Tutorial solution of Thermal Power station (Principles of power system Vk-Mehta)
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This document contains solutions to multiple problems related to principles of power systems and heat and energy calculations. Solution 1 calculates the heat produced by 0.75kg of coal and the heat equivalent of 1KWh to find the efficiency. Solution 2 calculates the overall thermal and electrical efficiency and the heat produced per hour by a 75MW plant. It then finds the coal consumption per hour. Solution 3 calculates the maximum units that can be generated according to a load factor and the corresponding coal consumption per day. It also calculates the overall efficiency. Solution 4 calculates the maximum energy that can be produced in a day by a 60,000KW plant and the corresponding coal consumption and specific fuel consumption per day.
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1) Carnot, simple Rankine, and modified Rankine cycles are analyzed. The modified Rankine cycle with superheat has the highest efficiency of 40.86% and lowest SSC of 2.4820 kg/kWh.
2) "Metallurgical limit" refers to the maximum safe pressures and temperatures a power plant's components can withstand without damage.
3) Implementing reheating in the Rankine cycle increases efficiency to 41.05% and lowers SSC to 2.4663 kg/kWh by utilizing the steam's initial high temperature againLecture-1.pdf
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SFEE:
W = m[(h2 - h1) - (KE2 - KE1) - (PE2 - PE1)]
State 1: 1 bar, 20°C
h1 = 293.9 kJ/kg
KE1 = 0
PE1 = 0
State 2: 3.5 bar
Use isentropic process with s1 = s2
h2 = 341.4 kJ/kg
KE2 = 0.5*m*(7)^2 = 24.5 kJ/kg
PE2 - PE1 = 0
W = m[(h2 - h1) - (KE2 - KE1)]
= (341.2.5 analysing electrical energy and power
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