際際滷shows by User: raidrashad / http://www.slideshare.net/images/logo.gif 際際滷shows by User: raidrashad / Wed, 15 Apr 2020 16:13:09 GMT 際際滷Share feed for 際際滷shows by User: raidrashad Cascaded Thermodynamic and Environmental Analyses of Energy Generation Modalities of a High-Performance Building Based on Real-Time Measurements /slideshow/cascaded-thermodynamic-and-environmental-analyses-of-energy-generation-modalities-of-a-highperformance-building-based-on-realtime-measurements/232061181 entropy-22-00445-200415161309
This study presents cascaded thermodynamic and environmental analyses of a high-performance academic building. Five different energy efficiency measures and operation scenarios are evaluated based on the actual measurements starting from the initial design concept. The study is to emphasize that by performing dynamical energy, exergy, exergoeconomic, and environmental analyses with increasing complexity, a better picture of building performance indicators can be obtained for both the building owners and users, helping them to decide on different investment strategies. As the first improvement, the original design is modified by the addition of a ground-air heat exchanger for pre-conditioning the incoming air to heat the ground floors. The installation of roof-top PV panels to use solar energy is considered as the third case, and the use of a trigeneration system as an energy source instead of traditional boiler systems is considered as the fourth case. The last case is the integration of all these three alternative energy modalities for the building. It is determined that the use of a trigeneration system provides a better outcome than the other scenarios for decreased energy demand, for cost reduction, and for the improved exergy efficiency and sustainability index values relative to the original baseline design scenario. Yet, an integrated approach combining all these energy generation modalities provide the best return of investment.]]>
This study presents cascaded thermodynamic and environmental analyses of a high-performance academic building. Five different energy efficiency measures and operation scenarios are evaluated based on the actual measurements starting from the initial design concept. The study is to emphasize that by performing dynamical energy, exergy, exergoeconomic, and environmental analyses with increasing complexity, a better picture of building performance indicators can be obtained for both the building owners and users, helping them to decide on different investment strategies. As the first improvement, the original design is modified by the addition of a ground-air heat exchanger for pre-conditioning the incoming air to heat the ground floors. The installation of roof-top PV panels to use solar energy is considered as the third case, and the use of a trigeneration system as an energy source instead of traditional boiler systems is considered as the fourth case. The last case is the integration of all these three alternative energy modalities for the building. It is determined that the use of a trigeneration system provides a better outcome than the other scenarios for decreased energy demand, for cost reduction, and for the improved exergy efficiency and sustainability index values relative to the original baseline design scenario. Yet, an integrated approach combining all these energy generation modalities provide the best return of investment.]]> Wed, 15 Apr 2020 16:13:09 GMT /slideshow/cascaded-thermodynamic-and-environmental-analyses-of-energy-generation-modalities-of-a-highperformance-building-based-on-realtime-measurements/232061181 raidrashad@slideshare.net(raidrashad) Cascaded Thermodynamic and Environmental Analyses of Energy Generation Modalities of a High-Performance Building Based on Real-Time Measurements raidrashad This study presents cascaded thermodynamic and environmental analyses of a high-performance academic building. Five different energy efficiency measures and operation scenarios are evaluated based on the actual measurements starting from the initial design concept. The study is to emphasize that by performing dynamical energy, exergy, exergoeconomic, and environmental analyses with increasing complexity, a better picture of building performance indicators can be obtained for both the building owners and users, helping them to decide on different investment strategies. As the first improvement, the original design is modified by the addition of a ground-air heat exchanger for pre-conditioning the incoming air to heat the ground floors. The installation of roof-top PV panels to use solar energy is considered as the third case, and the use of a trigeneration system as an energy source instead of traditional boiler systems is considered as the fourth case. The last case is the integration of all these three alternative energy modalities for the building. It is determined that the use of a trigeneration system provides a better outcome than the other scenarios for decreased energy demand, for cost reduction, and for the improved exergy efficiency and sustainability index values relative to the original baseline design scenario. Yet, an integrated approach combining all these energy generation modalities provide the best return of investment. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/entropy-22-00445-200415161309-thumbnail.jpg?width=120&amp;height=120&amp;fit=bounds" /><br> This study presents cascaded thermodynamic and environmental analyses of a high-performance academic building. Five different energy efficiency measures and operation scenarios are evaluated based on the actual measurements starting from the initial design concept. The study is to emphasize that by performing dynamical energy, exergy, exergoeconomic, and environmental analyses with increasing complexity, a better picture of building performance indicators can be obtained for both the building owners and users, helping them to decide on different investment strategies. As the first improvement, the original design is modified by the addition of a ground-air heat exchanger for pre-conditioning the incoming air to heat the ground floors. The installation of roof-top PV panels to use solar energy is considered as the third case, and the use of a trigeneration system as an energy source instead of traditional boiler systems is considered as the fourth case. The last case is the integration of all these three alternative energy modalities for the building. It is determined that the use of a trigeneration system provides a better outcome than the other scenarios for decreased energy demand, for cost reduction, and for the improved exergy efficiency and sustainability index values relative to the original baseline design scenario. Yet, an integrated approach combining all these energy generation modalities provide the best return of investment.
Cascaded Thermodynamic and Environmental Analyses of Energy Generation Modalities of a High-Performance Building Based on Real-Time Measurements from Ozyegin University
]]> 70 0 https://cdn.slidesharecdn.com/ss_thumbnails/entropy-22-00445-200415161309-thumbnail.jpg?width=120&height=120&fit=bounds document Black http://activitystrea.ms/schema/1.0/post http://activitystrea.ms/schema/1.0/posted 0 An experimental and analytical study to show the effect of the /slideshow/an-experimental-and-analytical-study-to-show-the-effect-of-the-202212567/202212567 anexperimentalandanalyticalstudytoshowtheeffectofthe-191206074359
The main purpose of this paper is showing the enhancement of thermal conductivity of the epoxy with many percentages of carbon fiber into it. In addition to pure epoxy and pure carbon fiber, three percentages of carbon fiber are used in this study, which are 20, 40, and 60%, respectively. All of these samples are tested at different values of applied powers (input power) (10, 25, 40, 55, and 70 W). A comparison between pure epoxy, pure carbon fiber and the composites that involve all these percentages is done. In addition, the study involves the effect of these simples on the performances of both Aluminum and cooper heat sinks. It is shown from the results that increasing in fiber carbon percentage leads to increase in thermal conductivity of composite, heat sink junction temperature, overall heat sink efficiency, and density of composite. The increasing in overall heat sink efficiency leads to decrease the height of heat sink, and consequently decreasing its cost. For instance at 70 W power input, increasing the fiber carbon percentage(from 0 to 100%) for each material of heat sink, leads to decrease the average fin length by 48% ,decrease the manufacturing cost by 47%, increase in junction temperature by 65 %, and increase fin efficiency by 2.5 %.]]>
The main purpose of this paper is showing the enhancement of thermal conductivity of the epoxy with many percentages of carbon fiber into it. In addition to pure epoxy and pure carbon fiber, three percentages of carbon fiber are used in this study, which are 20, 40, and 60%, respectively. All of these samples are tested at different values of applied powers (input power) (10, 25, 40, 55, and 70 W). A comparison between pure epoxy, pure carbon fiber and the composites that involve all these percentages is done. In addition, the study involves the effect of these simples on the performances of both Aluminum and cooper heat sinks. It is shown from the results that increasing in fiber carbon percentage leads to increase in thermal conductivity of composite, heat sink junction temperature, overall heat sink efficiency, and density of composite. The increasing in overall heat sink efficiency leads to decrease the height of heat sink, and consequently decreasing its cost. For instance at 70 W power input, increasing the fiber carbon percentage(from 0 to 100%) for each material of heat sink, leads to decrease the average fin length by 48% ,decrease the manufacturing cost by 47%, increase in junction temperature by 65 %, and increase fin efficiency by 2.5 %.]]> Fri, 06 Dec 2019 07:43:59 GMT /slideshow/an-experimental-and-analytical-study-to-show-the-effect-of-the-202212567/202212567 raidrashad@slideshare.net(raidrashad) An experimental and analytical study to show the effect of the raidrashad The main purpose of this paper is showing the enhancement of thermal conductivity of the epoxy with many percentages of carbon fiber into it. In addition to pure epoxy and pure carbon fiber, three percentages of carbon fiber are used in this study, which are 20, 40, and 60%, respectively. All of these samples are tested at different values of applied powers (input power) (10, 25, 40, 55, and 70 W). A comparison between pure epoxy, pure carbon fiber and the composites that involve all these percentages is done. In addition, the study involves the effect of these simples on the performances of both Aluminum and cooper heat sinks. It is shown from the results that increasing in fiber carbon percentage leads to increase in thermal conductivity of composite, heat sink junction temperature, overall heat sink efficiency, and density of composite. The increasing in overall heat sink efficiency leads to decrease the height of heat sink, and consequently decreasing its cost. For instance at 70 W power input, increasing the fiber carbon percentage(from 0 to 100%) for each material of heat sink, leads to decrease the average fin length by 48% ,decrease the manufacturing cost by 47%, increase in junction temperature by 65 %, and increase fin efficiency by 2.5 %. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/anexperimentalandanalyticalstudytoshowtheeffectofthe-191206074359-thumbnail.jpg?width=120&amp;height=120&amp;fit=bounds" /><br> The main purpose of this paper is showing the enhancement of thermal conductivity of the epoxy with many percentages of carbon fiber into it. In addition to pure epoxy and pure carbon fiber, three percentages of carbon fiber are used in this study, which are 20, 40, and 60%, respectively. All of these samples are tested at different values of applied powers (input power) (10, 25, 40, 55, and 70 W). A comparison between pure epoxy, pure carbon fiber and the composites that involve all these percentages is done. In addition, the study involves the effect of these simples on the performances of both Aluminum and cooper heat sinks. It is shown from the results that increasing in fiber carbon percentage leads to increase in thermal conductivity of composite, heat sink junction temperature, overall heat sink efficiency, and density of composite. The increasing in overall heat sink efficiency leads to decrease the height of heat sink, and consequently decreasing its cost. For instance at 70 W power input, increasing the fiber carbon percentage(from 0 to 100%) for each material of heat sink, leads to decrease the average fin length by 48% ,decrease the manufacturing cost by 47%, increase in junction temperature by 65 %, and increase fin efficiency by 2.5 %.
An experimental and analytical study to show the effect of the from Ozyegin University
]]> 70 1 https://cdn.slidesharecdn.com/ss_thumbnails/anexperimentalandanalyticalstudytoshowtheeffectofthe-191206074359-thumbnail.jpg?width=120&height=120&fit=bounds document Black http://activitystrea.ms/schema/1.0/post http://activitystrea.ms/schema/1.0/posted 0 THE EFFECT OF SKULDUGGERY IN FUEL OF DIESEL ENGINES ON THE PERFORMANCE OF I. C. ENGINE /raidrashad/the-effect-of-skulduggery-in-fuel-of-diesel-engines-on-the-performance-of-i-c-engine-114104249 theeffectofskulduggeryinfuelof-2-15-180912172545
The current research aimed to study the effect of fraud in the diesel fuel on environmental pollution, the study included two samples of diesel fuel., first sample is used currently in all diesel engines vehicles, and it produced in colander of oil of Baiji, the second sample is producer manually from mixing of the Lubricating oils and kerosene with ratio (1/40), were prepared and tested in research laboratories and quality control of the North Refineries Company /BAIJI by using standard engine (CFR). comparison between two models of fuel in terms of the properties of the mixing fuel and the properties of diesel fuel standard. The results proved that the process of mixing these , leading to the minimization of Cetane number and flash point. While the viscosity increase in mixing fuel, comparison with fuel producer in the refinery, and which identical to the minimum standard specifications of diesel fuel.]]>
The current research aimed to study the effect of fraud in the diesel fuel on environmental pollution, the study included two samples of diesel fuel., first sample is used currently in all diesel engines vehicles, and it produced in colander of oil of Baiji, the second sample is producer manually from mixing of the Lubricating oils and kerosene with ratio (1/40), were prepared and tested in research laboratories and quality control of the North Refineries Company /BAIJI by using standard engine (CFR). comparison between two models of fuel in terms of the properties of the mixing fuel and the properties of diesel fuel standard. The results proved that the process of mixing these , leading to the minimization of Cetane number and flash point. While the viscosity increase in mixing fuel, comparison with fuel producer in the refinery, and which identical to the minimum standard specifications of diesel fuel.]]> Wed, 12 Sep 2018 17:25:45 GMT /raidrashad/the-effect-of-skulduggery-in-fuel-of-diesel-engines-on-the-performance-of-i-c-engine-114104249 raidrashad@slideshare.net(raidrashad) THE EFFECT OF SKULDUGGERY IN FUEL OF DIESEL ENGINES ON THE PERFORMANCE OF I. C. ENGINE raidrashad The current research aimed to study the effect of fraud in the diesel fuel on environmental pollution, the study included two samples of diesel fuel., first sample is used currently in all diesel engines vehicles, and it produced in colander of oil of Baiji, the second sample is producer manually from mixing of the Lubricating oils and kerosene with ratio (1/40), were prepared and tested in research laboratories and quality control of the North Refineries Company /BAIJI by using standard engine (CFR). comparison between two models of fuel in terms of the properties of the mixing fuel and the properties of diesel fuel standard. The results proved that the process of mixing these , leading to the minimization of Cetane number and flash point. While the viscosity increase in mixing fuel, comparison with fuel producer in the refinery, and which identical to the minimum standard specifications of diesel fuel. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/theeffectofskulduggeryinfuelof-2-15-180912172545-thumbnail.jpg?width=120&amp;height=120&amp;fit=bounds" /><br> The current research aimed to study the effect of fraud in the diesel fuel on environmental pollution, the study included two samples of diesel fuel., first sample is used currently in all diesel engines vehicles, and it produced in colander of oil of Baiji, the second sample is producer manually from mixing of the Lubricating oils and kerosene with ratio (1/40), were prepared and tested in research laboratories and quality control of the North Refineries Company /BAIJI by using standard engine (CFR). comparison between two models of fuel in terms of the properties of the mixing fuel and the properties of diesel fuel standard. The results proved that the process of mixing these , leading to the minimization of Cetane number and flash point. While the viscosity increase in mixing fuel, comparison with fuel producer in the refinery, and which identical to the minimum standard specifications of diesel fuel.
THE EFFECT OF SKULDUGGERY IN FUEL OF DIESEL ENGINES ON THE PERFORMANCE OF I. C. ENGINE from Ozyegin University
]]> 52 1 https://cdn.slidesharecdn.com/ss_thumbnails/theeffectofskulduggeryinfuelof-2-15-180912172545-thumbnail.jpg?width=120&height=120&fit=bounds document Black http://activitystrea.ms/schema/1.0/post http://activitystrea.ms/schema/1.0/posted 0 DETERMINATION OF THE TEMPERATURE DISTRIBUTION THE PERFORATED FINS UNDER NATURAL CONVECTION /slideshow/determination-of-the-temperature-distribution-the-perforated-fins-under-natural-convection-114103543/114103543 finsnaturalconvectionazizthandraaid-180912172209
This work treats the problem of heat transfer for perforated fins under natural convection. The temperature distribution is examined for an array of rectangular fins (15 fins) with uniform cross-sectional area (100x270 mm) embedded with various vertical body perforations that extend through the fin thickness. The patterns of perforations include 18 circular perforations (holes). Experiments were carried out in an experimental facility that was specifically design and constructed for this purpose. The heat transfer rate and the coefficient of heat transfer increases with perforation diameter increased]]>
This work treats the problem of heat transfer for perforated fins under natural convection. The temperature distribution is examined for an array of rectangular fins (15 fins) with uniform cross-sectional area (100x270 mm) embedded with various vertical body perforations that extend through the fin thickness. The patterns of perforations include 18 circular perforations (holes). Experiments were carried out in an experimental facility that was specifically design and constructed for this purpose. The heat transfer rate and the coefficient of heat transfer increases with perforation diameter increased]]> Wed, 12 Sep 2018 17:22:09 GMT /slideshow/determination-of-the-temperature-distribution-the-perforated-fins-under-natural-convection-114103543/114103543 raidrashad@slideshare.net(raidrashad) DETERMINATION OF THE TEMPERATURE DISTRIBUTION THE PERFORATED FINS UNDER NATURAL CONVECTION raidrashad This work treats the problem of heat transfer for perforated fins under natural convection. The temperature distribution is examined for an array of rectangular fins (15 fins) with uniform cross-sectional area (100x270 mm) embedded with various vertical body perforations that extend through the fin thickness. The patterns of perforations include 18 circular perforations (holes). Experiments were carried out in an experimental facility that was specifically design and constructed for this purpose. The heat transfer rate and the coefficient of heat transfer increases with perforation diameter increased <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/finsnaturalconvectionazizthandraaid-180912172209-thumbnail.jpg?width=120&amp;height=120&amp;fit=bounds" /><br> This work treats the problem of heat transfer for perforated fins under natural convection. The temperature distribution is examined for an array of rectangular fins (15 fins) with uniform cross-sectional area (100x270 mm) embedded with various vertical body perforations that extend through the fin thickness. The patterns of perforations include 18 circular perforations (holes). Experiments were carried out in an experimental facility that was specifically design and constructed for this purpose. The heat transfer rate and the coefficient of heat transfer increases with perforation diameter increased
DETERMINATION OF THE TEMPERATURE DISTRIBUTION THE PERFORATED FINS UNDER NATURAL CONVECTION from Ozyegin University
]]> 71 1 https://cdn.slidesharecdn.com/ss_thumbnails/finsnaturalconvectionazizthandraaid-180912172209-thumbnail.jpg?width=120&height=120&fit=bounds document Black http://activitystrea.ms/schema/1.0/post http://activitystrea.ms/schema/1.0/posted 0 Experimental Study of the Effect of Octane Number on the Performance Coefficients of of the Two Strokes Spark Ignition Engine /slideshow/experimental-study-of-the-effect-of-octane-number-on-the-performance-coefficients-of-of-the-two-strokes-spark-ignition-engine-114103015/114103015 effectofoctanenumberonthe-180912171925
Effect the octane number of fuel on the two-stroke I. C. E. ]]>
Effect the octane number of fuel on the two-stroke I. C. E. ]]> Wed, 12 Sep 2018 17:19:25 GMT /slideshow/experimental-study-of-the-effect-of-octane-number-on-the-performance-coefficients-of-of-the-two-strokes-spark-ignition-engine-114103015/114103015 raidrashad@slideshare.net(raidrashad) Experimental Study of the Effect of Octane Number on the Performance Coefficients of of the Two Strokes Spark Ignition Engine raidrashad Effect the octane number of fuel on the two-stroke I. C. E. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/effectofoctanenumberonthe-180912171925-thumbnail.jpg?width=120&amp;height=120&amp;fit=bounds" /><br> Effect the octane number of fuel on the two-stroke I. C. E.
Experimental Study of the Effect of Octane Number on the Performance Coefficients of of the Two Strokes Spark Ignition Engine from Ozyegin University
]]> 40 1 https://cdn.slidesharecdn.com/ss_thumbnails/effectofoctanenumberonthe-180912171925-thumbnail.jpg?width=120&height=120&fit=bounds document Black http://activitystrea.ms/schema/1.0/post http://activitystrea.ms/schema/1.0/posted 0 I.c. engine by using thermal storage technique /slideshow/ic-engine-by-using-thermal-storage-technique/114102718 i-180912171757
Improving the I. C. E. performance by using heat recovery heat exchanger (rotary heat exchanger)]]>
Improving the I. C. E. performance by using heat recovery heat exchanger (rotary heat exchanger)]]> Wed, 12 Sep 2018 17:17:57 GMT /slideshow/ic-engine-by-using-thermal-storage-technique/114102718 raidrashad@slideshare.net(raidrashad) I.c. engine by using thermal storage technique raidrashad Improving the I. C. E. performance by using heat recovery heat exchanger (rotary heat exchanger) <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/i-180912171757-thumbnail.jpg?width=120&amp;height=120&amp;fit=bounds" /><br> Improving the I. C. E. performance by using heat recovery heat exchanger (rotary heat exchanger)
I.c. engine by using thermal storage technique from Ozyegin University
]]> 75 1 https://cdn.slidesharecdn.com/ss_thumbnails/i-180912171757-thumbnail.jpg?width=120&height=120&fit=bounds document Black http://activitystrea.ms/schema/1.0/post http://activitystrea.ms/schema/1.0/posted 0 EFFECT THE FORM OF PERFORATION ON THE HEAT TRANSFER IN THE PERFORATED FINS /slideshow/effect-the-form-of-perforation-on-the-heat-transfer-114102516/114102516 effecttheformofperforationontheheattransfer-180912171657
Extended surface heat exchangers are easy in construction and extensively use in many of the industries. Continuous research is going on to improve its effectiveness by reducing the thermal boundary layer thickness and increasing the heat transfer surface area. Perforations in the fins one way that used to improve its effectiveness. An experimental study submitted to investigate the heat transfer by natural convection in a rectangular perforated fin plates. Five fins used in this work first fin non-perforated and others fins perforated by different shapes these fins perforation by different shapes (circle, square, triangle, and hexagon) but these perforations have the same cross section area(113 mm2. These perforations distributed on 3 columns and 6 rows. Experiments produced through in an experimental facility that was specifically design and constructed for this purpose. The results show that the drop in the temperature of the non-perforated fin from 72 to 57 oC while the temperature drop in perforated fins, at the same power supplied (126 W) was (72-52 oC), (72-51.5 oC), (72-50 oC) and (72 -48 oC) for shapes (hexagonal, square, circular and triangular) respectively Figure(9). The largest value of RAF at triangular perforation and the smaller value occurred in circular perforation. Also, triangular perforation gives best values of heat transfer coefficient and then the circular, square, hexagonal, and non-perforation respectively. Keywords: Heat transfer, Surface heat exchangers, Perforated fin plates]]>
Extended surface heat exchangers are easy in construction and extensively use in many of the industries. Continuous research is going on to improve its effectiveness by reducing the thermal boundary layer thickness and increasing the heat transfer surface area. Perforations in the fins one way that used to improve its effectiveness. An experimental study submitted to investigate the heat transfer by natural convection in a rectangular perforated fin plates. Five fins used in this work first fin non-perforated and others fins perforated by different shapes these fins perforation by different shapes (circle, square, triangle, and hexagon) but these perforations have the same cross section area(113 mm2. These perforations distributed on 3 columns and 6 rows. Experiments produced through in an experimental facility that was specifically design and constructed for this purpose. The results show that the drop in the temperature of the non-perforated fin from 72 to 57 oC while the temperature drop in perforated fins, at the same power supplied (126 W) was (72-52 oC), (72-51.5 oC), (72-50 oC) and (72 -48 oC) for shapes (hexagonal, square, circular and triangular) respectively Figure(9). The largest value of RAF at triangular perforation and the smaller value occurred in circular perforation. Also, triangular perforation gives best values of heat transfer coefficient and then the circular, square, hexagonal, and non-perforation respectively. Keywords: Heat transfer, Surface heat exchangers, Perforated fin plates]]> Wed, 12 Sep 2018 17:16:57 GMT /slideshow/effect-the-form-of-perforation-on-the-heat-transfer-114102516/114102516 raidrashad@slideshare.net(raidrashad) EFFECT THE FORM OF PERFORATION ON THE HEAT TRANSFER IN THE PERFORATED FINS raidrashad Extended surface heat exchangers are easy in construction and extensively use in many of the industries. Continuous research is going on to improve its effectiveness by reducing the thermal boundary layer thickness and increasing the heat transfer surface area. Perforations in the fins one way that used to improve its effectiveness. An experimental study submitted to investigate the heat transfer by natural convection in a rectangular perforated fin plates. Five fins used in this work first fin non-perforated and others fins perforated by different shapes these fins perforation by different shapes (circle, square, triangle, and hexagon) but these perforations have the same cross section area(113 mm2. These perforations distributed on 3 columns and 6 rows. Experiments produced through in an experimental facility that was specifically design and constructed for this purpose. The results show that the drop in the temperature of the non-perforated fin from 72 to 57 oC while the temperature drop in perforated fins, at the same power supplied (126 W) was (72-52 oC), (72-51.5 oC), (72-50 oC) and (72 -48 oC) for shapes (hexagonal, square, circular and triangular) respectively Figure(9). The largest value of RAF at triangular perforation and the smaller value occurred in circular perforation. Also, triangular perforation gives best values of heat transfer coefficient and then the circular, square, hexagonal, and non-perforation respectively. Keywords: Heat transfer, Surface heat exchangers, Perforated fin plates <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/effecttheformofperforationontheheattransfer-180912171657-thumbnail.jpg?width=120&amp;height=120&amp;fit=bounds" /><br> Extended surface heat exchangers are easy in construction and extensively use in many of the industries. Continuous research is going on to improve its effectiveness by reducing the thermal boundary layer thickness and increasing the heat transfer surface area. Perforations in the fins one way that used to improve its effectiveness. An experimental study submitted to investigate the heat transfer by natural convection in a rectangular perforated fin plates. Five fins used in this work first fin non-perforated and others fins perforated by different shapes these fins perforation by different shapes (circle, square, triangle, and hexagon) but these perforations have the same cross section area(113 mm2. These perforations distributed on 3 columns and 6 rows. Experiments produced through in an experimental facility that was specifically design and constructed for this purpose. The results show that the drop in the temperature of the non-perforated fin from 72 to 57 oC while the temperature drop in perforated fins, at the same power supplied (126 W) was (72-52 oC), (72-51.5 oC), (72-50 oC) and (72 -48 oC) for shapes (hexagonal, square, circular and triangular) respectively Figure(9). The largest value of RAF at triangular perforation and the smaller value occurred in circular perforation. Also, triangular perforation gives best values of heat transfer coefficient and then the circular, square, hexagonal, and non-perforation respectively. Keywords: Heat transfer, Surface heat exchangers, Perforated fin plates
EFFECT THE FORM OF PERFORATION ON THE HEAT TRANSFER IN THE PERFORATED FINS from Ozyegin University
]]> 113 3 https://cdn.slidesharecdn.com/ss_thumbnails/effecttheformofperforationontheheattransfer-180912171657-thumbnail.jpg?width=120&height=120&fit=bounds document Black http://activitystrea.ms/schema/1.0/post http://activitystrea.ms/schema/1.0/posted 0 Mixed convection heat transferin inclined tubes with constant heat flux /slideshow/mixed-convection-heat-transferin-inclined-tubes-with-constant-heat-flux/114102250 mixedconvectionheattransferininclinedtubeswithconstantheatfluxeuropeanjournalofscientificresearchvol-180912171533
Heat transfer in tubes ]]>
Heat transfer in tubes ]]> Wed, 12 Sep 2018 17:15:33 GMT /slideshow/mixed-convection-heat-transferin-inclined-tubes-with-constant-heat-flux/114102250 raidrashad@slideshare.net(raidrashad) Mixed convection heat transferin inclined tubes with constant heat flux raidrashad Heat transfer in tubes <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/mixedconvectionheattransferininclinedtubeswithconstantheatfluxeuropeanjournalofscientificresearchvol-180912171533-thumbnail.jpg?width=120&amp;height=120&amp;fit=bounds" /><br> Heat transfer in tubes
Mixed convection heat transferin inclined tubes with constant heat flux from Ozyegin University
]]> 124 4 https://cdn.slidesharecdn.com/ss_thumbnails/mixedconvectionheattransferininclinedtubeswithconstantheatfluxeuropeanjournalofscientificresearchvol-180912171533-thumbnail.jpg?width=120&height=120&fit=bounds document Black http://activitystrea.ms/schema/1.0/post http://activitystrea.ms/schema/1.0/posted 0 Experimental Study of the Effect of Octane Number on the Performance Coefficients of of the Two Strokes Spark Ignition Engine /slideshow/experimental-study-of-the-effect-of-octane-number-on-the-performance-coefficients-of-of-the-two-strokes-spark-ignition-engine/111046781 effectofoctanenumberonthe-180822200658
The experiments had been carried out using two stroke, single cylinder type (TD113), with compression ratio of (7.3:1) Coupled to hydraulic dynamometer type (TD115). The results showed that there is enhancement of the engine performance with increasing octane number. This appears clearly when comparing the results of performance with fuel of 75 and 95 octane number. The torque increases 10% at speed of 2750 RPM. The break power also increases 18% when the octane number changed from 75 to 95 at 3000 RPM of engine speed. The same change in octane number will increase the thermal efficiency by 9% at 2300 RPM of engine speed. The break specific fuel consumption decreases at the same ratio of thermal efficiency 9% but at 2400 RPM. The less fuel consumption happens at 2400 RPM for octane number 95.]]>
The experiments had been carried out using two stroke, single cylinder type (TD113), with compression ratio of (7.3:1) Coupled to hydraulic dynamometer type (TD115). The results showed that there is enhancement of the engine performance with increasing octane number. This appears clearly when comparing the results of performance with fuel of 75 and 95 octane number. The torque increases 10% at speed of 2750 RPM. The break power also increases 18% when the octane number changed from 75 to 95 at 3000 RPM of engine speed. The same change in octane number will increase the thermal efficiency by 9% at 2300 RPM of engine speed. The break specific fuel consumption decreases at the same ratio of thermal efficiency 9% but at 2400 RPM. The less fuel consumption happens at 2400 RPM for octane number 95.]]> Wed, 22 Aug 2018 20:06:57 GMT /slideshow/experimental-study-of-the-effect-of-octane-number-on-the-performance-coefficients-of-of-the-two-strokes-spark-ignition-engine/111046781 raidrashad@slideshare.net(raidrashad) Experimental Study of the Effect of Octane Number on the Performance Coefficients of of the Two Strokes Spark Ignition Engine raidrashad The experiments had been carried out using two stroke, single cylinder type (TD113), with compression ratio of (7.3:1) Coupled to hydraulic dynamometer type (TD115). The results showed that there is enhancement of the engine performance with increasing octane number. This appears clearly when comparing the results of performance with fuel of 75 and 95 octane number. The torque increases 10% at speed of 2750 RPM. The break power also increases 18% when the octane number changed from 75 to 95 at 3000 RPM of engine speed. The same change in octane number will increase the thermal efficiency by 9% at 2300 RPM of engine speed. The break specific fuel consumption decreases at the same ratio of thermal efficiency 9% but at 2400 RPM. The less fuel consumption happens at 2400 RPM for octane number 95. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/effectofoctanenumberonthe-180822200658-thumbnail.jpg?width=120&amp;height=120&amp;fit=bounds" /><br> The experiments had been carried out using two stroke, single cylinder type (TD113), with compression ratio of (7.3:1) Coupled to hydraulic dynamometer type (TD115). The results showed that there is enhancement of the engine performance with increasing octane number. This appears clearly when comparing the results of performance with fuel of 75 and 95 octane number. The torque increases 10% at speed of 2750 RPM. The break power also increases 18% when the octane number changed from 75 to 95 at 3000 RPM of engine speed. The same change in octane number will increase the thermal efficiency by 9% at 2300 RPM of engine speed. The break specific fuel consumption decreases at the same ratio of thermal efficiency 9% but at 2400 RPM. The less fuel consumption happens at 2400 RPM for octane number 95.
Experimental Study of the Effect of Octane Number on the Performance Coefficients of of the Two Strokes Spark Ignition Engine from Ozyegin University
]]> 91 4 https://cdn.slidesharecdn.com/ss_thumbnails/effectofoctanenumberonthe-180822200658-thumbnail.jpg?width=120&height=120&fit=bounds document Black http://activitystrea.ms/schema/1.0/post http://activitystrea.ms/schema/1.0/posted 0 PERFORMANCE ENHANCEMENT OF THE I.C. ENGINE BY USING THERMAL STORAGE TECHNIQUE /slideshow/performance-enhancement-of-the-ic-engine-by-using-thermal-storage-technique/111046731 i-180822200521
The project of this work is to control the temperature of a mixture which enters to the I.C.E. and keeping it within a certain range which enhance its performance. Four stroke, Engine working with benzene as a fuel was used. Experimental data were taken including the exhaust temperature and the flow rate of both air and fuel. These data were formulated by using suitable theoretical relations for heat exchanger. The dimensions of the exchanger were assumed to control the inlet mixture temperature. The results proved that it is possible to control the entering mixture temperature which enters to the I.C.E. by controlling to the speed of rotary exchanger. The results were that, at the temperatures of the environment 5oC and 10 oC it was prove that the RPM of the exchanger should be 10 RPM, also at the environment temperatures 20,30, and 40 oC ,the rotation speed should be within the ranges (3-10),(2-5.5) and (1-2) RPM respectively. In order to guarantee staying the entering mixture temperature within, the required range. KEYWORDS Thermal Storage, I.C. Engine, Rotary Heat Exchanger - )27 27( 27]]>
The project of this work is to control the temperature of a mixture which enters to the I.C.E. and keeping it within a certain range which enhance its performance. Four stroke, Engine working with benzene as a fuel was used. Experimental data were taken including the exhaust temperature and the flow rate of both air and fuel. These data were formulated by using suitable theoretical relations for heat exchanger. The dimensions of the exchanger were assumed to control the inlet mixture temperature. The results proved that it is possible to control the entering mixture temperature which enters to the I.C.E. by controlling to the speed of rotary exchanger. The results were that, at the temperatures of the environment 5oC and 10 oC it was prove that the RPM of the exchanger should be 10 RPM, also at the environment temperatures 20,30, and 40 oC ,the rotation speed should be within the ranges (3-10),(2-5.5) and (1-2) RPM respectively. In order to guarantee staying the entering mixture temperature within, the required range. KEYWORDS Thermal Storage, I.C. Engine, Rotary Heat Exchanger - )27 27( 27]]> Wed, 22 Aug 2018 20:05:21 GMT /slideshow/performance-enhancement-of-the-ic-engine-by-using-thermal-storage-technique/111046731 raidrashad@slideshare.net(raidrashad) PERFORMANCE ENHANCEMENT OF THE I.C. ENGINE BY USING THERMAL STORAGE TECHNIQUE raidrashad The project of this work is to control the temperature of a mixture which enters to the I.C.E. and keeping it within a certain range which enhance its performance. Four stroke, Engine working with benzene as a fuel was used. Experimental data were taken including the exhaust temperature and the flow rate of both air and fuel. These data were formulated by using suitable theoretical relations for heat exchanger. The dimensions of the exchanger were assumed to control the inlet mixture temperature. The results proved that it is possible to control the entering mixture temperature which enters to the I.C.E. by controlling to the speed of rotary exchanger. The results were that, at the temperatures of the environment 5oC and 10 oC it was prove that the RPM of the exchanger should be 10 RPM, also at the environment temperatures 20,30, and 40 oC ,the rotation speed should be within the ranges (3-10),(2-5.5) and (1-2) RPM respectively. In order to guarantee staying the entering mixture temperature within, the required range. KEYWORDS Thermal Storage, I.C. Engine, Rotary Heat Exchanger - )27 27( 27 <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/i-180822200521-thumbnail.jpg?width=120&amp;height=120&amp;fit=bounds" /><br> The project of this work is to control the temperature of a mixture which enters to the I.C.E. and keeping it within a certain range which enhance its performance. Four stroke, Engine working with benzene as a fuel was used. Experimental data were taken including the exhaust temperature and the flow rate of both air and fuel. These data were formulated by using suitable theoretical relations for heat exchanger. The dimensions of the exchanger were assumed to control the inlet mixture temperature. The results proved that it is possible to control the entering mixture temperature which enters to the I.C.E. by controlling to the speed of rotary exchanger. The results were that, at the temperatures of the environment 5oC and 10 oC it was prove that the RPM of the exchanger should be 10 RPM, also at the environment temperatures 20,30, and 40 oC ,the rotation speed should be within the ranges (3-10),(2-5.5) and (1-2) RPM respectively. In order to guarantee staying the entering mixture temperature within, the required range. KEYWORDS Thermal Storage, I.C. Engine, Rotary Heat Exchanger - )27 27( 27
PERFORMANCE ENHANCEMENT OF THE I.C. ENGINE BY USING THERMAL STORAGE TECHNIQUE from Ozyegin University
]]> 52 2 https://cdn.slidesharecdn.com/ss_thumbnails/i-180822200521-thumbnail.jpg?width=120&height=120&fit=bounds document Black http://activitystrea.ms/schema/1.0/post http://activitystrea.ms/schema/1.0/posted 0 DETERMINATION OF THE TEMPERATURE DISTRIBUTION THE PERFORATED FINS UNDER NATURAL CONVECTION /raidrashad/determination-of-the-temperature-distribution-the-perforated-fins-under-natural-convection perforatedfinsnaturalconvection-180822200403
This work treats the problem of heat transfer for perforated fins under natural convection. The temperature distribution is examined for an array of rectangular fins (15 fins) with uniform cross-sectional area (100x270 mm) embedded with various vertical body perforations that extend through the fin thickness. The patterns of perforations include 18 circular perforations (holes). Experiments were carried out in an experimental facility that was specifically design and constructed for this purpose. The heat transfer rate and the coefficient of heat transfer increases with perforation diameter increased. KEYWORDS: Perforated Fins, Temperature Distribution, Natural Convection.]]>
This work treats the problem of heat transfer for perforated fins under natural convection. The temperature distribution is examined for an array of rectangular fins (15 fins) with uniform cross-sectional area (100x270 mm) embedded with various vertical body perforations that extend through the fin thickness. The patterns of perforations include 18 circular perforations (holes). Experiments were carried out in an experimental facility that was specifically design and constructed for this purpose. The heat transfer rate and the coefficient of heat transfer increases with perforation diameter increased. KEYWORDS: Perforated Fins, Temperature Distribution, Natural Convection.]]> Wed, 22 Aug 2018 20:04:03 GMT /raidrashad/determination-of-the-temperature-distribution-the-perforated-fins-under-natural-convection raidrashad@slideshare.net(raidrashad) DETERMINATION OF THE TEMPERATURE DISTRIBUTION THE PERFORATED FINS UNDER NATURAL CONVECTION raidrashad This work treats the problem of heat transfer for perforated fins under natural convection. The temperature distribution is examined for an array of rectangular fins (15 fins) with uniform cross-sectional area (100x270 mm) embedded with various vertical body perforations that extend through the fin thickness. The patterns of perforations include 18 circular perforations (holes). Experiments were carried out in an experimental facility that was specifically design and constructed for this purpose. The heat transfer rate and the coefficient of heat transfer increases with perforation diameter increased. KEYWORDS: Perforated Fins, Temperature Distribution, Natural Convection. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/perforatedfinsnaturalconvection-180822200403-thumbnail.jpg?width=120&amp;height=120&amp;fit=bounds" /><br> This work treats the problem of heat transfer for perforated fins under natural convection. The temperature distribution is examined for an array of rectangular fins (15 fins) with uniform cross-sectional area (100x270 mm) embedded with various vertical body perforations that extend through the fin thickness. The patterns of perforations include 18 circular perforations (holes). Experiments were carried out in an experimental facility that was specifically design and constructed for this purpose. The heat transfer rate and the coefficient of heat transfer increases with perforation diameter increased. KEYWORDS: Perforated Fins, Temperature Distribution, Natural Convection.
DETERMINATION OF THE TEMPERATURE DISTRIBUTION THE PERFORATED FINS UNDER NATURAL CONVECTION from Ozyegin University
]]> 39 3 https://cdn.slidesharecdn.com/ss_thumbnails/perforatedfinsnaturalconvection-180822200403-thumbnail.jpg?width=120&height=120&fit=bounds document Black http://activitystrea.ms/schema/1.0/post http://activitystrea.ms/schema/1.0/posted 0 THE EFFECT OF SKULDUGGERY IN FUEL OF DIESEL ENGINES ON THE PERFORMANCE OF I. C. ENGINE /slideshow/the-effect-of-skulduggery-in-fuel-of-diesel-engines-on-the-performance-of-i-c-engine/111046408 theeffectofskulduggeryinfuelof-2-15-180822195611
The current research aimed to study the effect of fraud on the diesel fuel on environmental pollution, the study included two samples of diesel fuel. The first sample is used currently in all diesel engines vehicles, and it produced in the colander of oil of Baiji, the second sample is producer manually from the mixing of the Lubricating oils and kerosene with a ratio (1/40), were prepared and tested in research laboratories and quality control of the North Refineries Company /BAIJI by using the standard engine (CFR). Comparison between two models of fuel in terms of the properties of the mixing fuel and the properties of diesel fuel standard. The results proved that the process of mixing these, leading to the minimization of Cetane number and flash point. While the viscosity increase in mixing fuel, comparison with fuel producer in the refinery, and which identical to the minimum standard specifications of diesel fuel. The tests had been carried out using the engine of (TQ) four-stroke type (TD115) with a single-cylinder and compression ratio (21:1) a complement to the hydraulic type Dynamometer (TD115).]]>
The current research aimed to study the effect of fraud on the diesel fuel on environmental pollution, the study included two samples of diesel fuel. The first sample is used currently in all diesel engines vehicles, and it produced in the colander of oil of Baiji, the second sample is producer manually from the mixing of the Lubricating oils and kerosene with a ratio (1/40), were prepared and tested in research laboratories and quality control of the North Refineries Company /BAIJI by using the standard engine (CFR). Comparison between two models of fuel in terms of the properties of the mixing fuel and the properties of diesel fuel standard. The results proved that the process of mixing these, leading to the minimization of Cetane number and flash point. While the viscosity increase in mixing fuel, comparison with fuel producer in the refinery, and which identical to the minimum standard specifications of diesel fuel. The tests had been carried out using the engine of (TQ) four-stroke type (TD115) with a single-cylinder and compression ratio (21:1) a complement to the hydraulic type Dynamometer (TD115).]]> Wed, 22 Aug 2018 19:56:11 GMT /slideshow/the-effect-of-skulduggery-in-fuel-of-diesel-engines-on-the-performance-of-i-c-engine/111046408 raidrashad@slideshare.net(raidrashad) THE EFFECT OF SKULDUGGERY IN FUEL OF DIESEL ENGINES ON THE PERFORMANCE OF I. C. ENGINE raidrashad The current research aimed to study the effect of fraud on the diesel fuel on environmental pollution, the study included two samples of diesel fuel. The first sample is used currently in all diesel engines vehicles, and it produced in the colander of oil of Baiji, the second sample is producer manually from the mixing of the Lubricating oils and kerosene with a ratio (1/40), were prepared and tested in research laboratories and quality control of the North Refineries Company /BAIJI by using the standard engine (CFR). Comparison between two models of fuel in terms of the properties of the mixing fuel and the properties of diesel fuel standard. The results proved that the process of mixing these, leading to the minimization of Cetane number and flash point. While the viscosity increase in mixing fuel, comparison with fuel producer in the refinery, and which identical to the minimum standard specifications of diesel fuel. The tests had been carried out using the engine of (TQ) four-stroke type (TD115) with a single-cylinder and compression ratio (21:1) a complement to the hydraulic type Dynamometer (TD115). <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/theeffectofskulduggeryinfuelof-2-15-180822195611-thumbnail.jpg?width=120&amp;height=120&amp;fit=bounds" /><br> The current research aimed to study the effect of fraud on the diesel fuel on environmental pollution, the study included two samples of diesel fuel. The first sample is used currently in all diesel engines vehicles, and it produced in the colander of oil of Baiji, the second sample is producer manually from the mixing of the Lubricating oils and kerosene with a ratio (1/40), were prepared and tested in research laboratories and quality control of the North Refineries Company /BAIJI by using the standard engine (CFR). Comparison between two models of fuel in terms of the properties of the mixing fuel and the properties of diesel fuel standard. The results proved that the process of mixing these, leading to the minimization of Cetane number and flash point. While the viscosity increase in mixing fuel, comparison with fuel producer in the refinery, and which identical to the minimum standard specifications of diesel fuel. The tests had been carried out using the engine of (TQ) four-stroke type (TD115) with a single-cylinder and compression ratio (21:1) a complement to the hydraulic type Dynamometer (TD115).
THE EFFECT OF SKULDUGGERY IN FUEL OF DIESEL ENGINES ON THE PERFORMANCE OF I. C. ENGINE from Ozyegin University
]]> 20 2 https://cdn.slidesharecdn.com/ss_thumbnails/theeffectofskulduggeryinfuelof-2-15-180822195611-thumbnail.jpg?width=120&height=120&fit=bounds document Black http://activitystrea.ms/schema/1.0/post http://activitystrea.ms/schema/1.0/posted 0 Effect the form of perforation on the heat transfer /slideshow/effect-the-form-of-perforation-on-the-heat-transfer/111046277 effecttheformofperforationontheheattransfer-180822195305
It presents the effect of the perforation form on the heat transfer. perforated fins, the heat sink ]]>
It presents the effect of the perforation form on the heat transfer. perforated fins, the heat sink ]]> Wed, 22 Aug 2018 19:53:05 GMT /slideshow/effect-the-form-of-perforation-on-the-heat-transfer/111046277 raidrashad@slideshare.net(raidrashad) Effect the form of perforation on the heat transfer raidrashad It presents the effect of the perforation form on the heat transfer. perforated fins, the heat sink <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/effecttheformofperforationontheheattransfer-180822195305-thumbnail.jpg?width=120&amp;height=120&amp;fit=bounds" /><br> It presents the effect of the perforation form on the heat transfer. perforated fins, the heat sink
Effect the form of perforation on the heat transfer from Ozyegin University
]]> 57 2 https://cdn.slidesharecdn.com/ss_thumbnails/effecttheformofperforationontheheattransfer-180822195305-thumbnail.jpg?width=120&height=120&fit=bounds document Black http://activitystrea.ms/schema/1.0/post http://activitystrea.ms/schema/1.0/posted 0 https://cdn.slidesharecdn.com/profile-photo-raidrashad-48x48.jpg?cb=1735418786 Engineering ceng.tu.edu.iq/college-administration/staff/756-raad-rashad.html https://cdn.slidesharecdn.com/ss_thumbnails/entropy-22-00445-200415161309-thumbnail.jpg?width=320&height=320&fit=bounds slideshow/cascaded-thermodynamic-and-environmental-analyses-of-energy-generation-modalities-of-a-highperformance-building-based-on-realtime-measurements/232061181 Cascaded Thermodynamic... https://cdn.slidesharecdn.com/ss_thumbnails/anexperimentalandanalyticalstudytoshowtheeffectofthe-191206074359-thumbnail.jpg?width=320&height=320&fit=bounds slideshow/an-experimental-and-analytical-study-to-show-the-effect-of-the-202212567/202212567 An experimental and an... https://cdn.slidesharecdn.com/ss_thumbnails/theeffectofskulduggeryinfuelof-2-15-180912172545-thumbnail.jpg?width=320&height=320&fit=bounds raidrashad/the-effect-of-skulduggery-in-fuel-of-diesel-engines-on-the-performance-of-i-c-engine-114104249 THE EFFECT OF SKULDUGG...