11. Ph畛 l畛c PL-5
Th担ng s畛 v畉t l箪 c畛a kh担ng kh鱈 kh担
t Cp 了.102 a.106 袖.106 僚.106 Pr
o
C kg/m3 kJ/kg.oC W/m.oC m2/s Pa.S m2/S
0 1,293 1,005 2,44 18,8 17,2 13,28 0,707
10 1,277 1,005 2,51 20,0 17,6 14,16 0,705
20 1,205 1,005 2,59 21,4 18,1 15,06 0,703
30 1,165 1,005 2,67 22,9 18,6 16,00 0,701
40 1,128 1,005 2,76 24,3 19,1 16,96 0,699
50 1,093 1,005 2,83 25,7 19,6 17,96 0,698
B畉NG CHUY畛N 畛I N V畛
1. p su畉t :
1 psi = 6,89476 kPa = 6894,76 N/m2
1 in Hg = 3,38639 kPa
1 in H2O = 0,24908 kPa
1 ft H2O = 2,98896 kPa
1 tonf/in2 = 15,4443 MPa
1 bar = 105 N/m2 = 105 Pa
1 at = 0,9807 Bar = 735,5 mmHg = 10 mH2O
1 kgf/cm2 = 1 at = 98,0665 kPa = 104 mmAq
1 mm Hg = 1 torr = 133,322 Pa
1 mmH2O = 9,80665 Pa
1 mmAq = 1 kgf/m2 = 9,807 N/m2
2. Nhi畛t 畛 :
5
[ ] 5
t o C = T o K 27315 = . t o F 32 = .T o R 27315
,
9 9
,
3. Kh畛i l動畛ng ri棚ng
1 lb/in3 = 27,68 g/cm3
1 lb/ft3 = 16,019 kg/m3
1 kg/m3 = 0,06243 lb/ft3
4. Gia t畛c
1 ft/s2 = 0,3048 m/s2
1 m/s2 = 3,2835 ft/s2
5. L動u l動畛ng th畛 t鱈ch
1 cfm = 4,71947.10-4 m3/s = 1,699 m3/h
1 m3/h = 0,588578 cfm
6. Chi畛u di
1 in = 25,4 mm
1 ft = 12 in = 304,8 mm = 0,333 yard
1 yard = 0,9144 m
1 mile = 1,609344 km = 5280 ft
1 m = 3,2808 ft
7. Di畛n t鱈ch
1 m2 = 10,7639 ft2 = 1550 in2
1 are = 100 m2
1 hectare = 104 m2
314
12. 1 ft2 = 144 in2 = 929 cm2
1 in2 = 645,16 mm2
8. Th畛 t鱈ch
1 Gal (US) = 3,7854 L鱈t = 0,13368 ft3
1 in3 = 16,387 cm3
1 ft3 = 0,0283168 m3
1 m3 = 35,3147 ft3
1 cm2 = 0,061024 in3
9. Kh畛i l動畛ng
1 oz = 28,3495 g
1 lb = 0,45359237 kg = 16 oz
1 quital = 100 kg
1 Ton = 1016,05 kg
1 kg = 2,2046 lb
1 g = 15,432 grains
10. C担ng su畉t
1 HP = 0,7457 kW
1 W = 1 J/s
1 T担n l畉nh (USRT) = 12.000 Btu/h = 3,5169 kW
1 T担n l畉nh (JRT) = 13.175 Btu/h = 3,86 kW
11. Nng l動畛ng
1 kWh = 3600 kJ = 3412 Btu
1 kCal = 4,187 kJ
1 Btu = 1,05506 kJ = 0,25198 kCal
1 Cal = 3,968 Btu
1 ft.lbf = 1,35582 J
1 Therm = 105,506 MJ
1 kJ = 1 kW.s
12. T畛c 畛 :
1 fpm = 0,00508 m/s
1 fps = 0,3048 m/s
1 m/s = 196,85 fpm
13. L畛c :
1 lbf = 4,44822 N
1 tonf = 9,964 kN
1 kip = 4,44822 kN
1 kgf = 1 kp = 9,80665 N
TI LI畛U THAM KH畉O
1. H ng Trung, Nguy畛n Qu但n . Gi叩o tr狸nh th担ng gi坦 v i畛u ti畉t kh担ng kh鱈. Tr動畛ng
畉i h畛c B叩ch khoa, H N畛i , 1993
2. H ng Trung, Nguy畛n Qu但n . C董 s畛 k畛 thu畉t i畛u ho kh担ng kh鱈 . Nh xu畉t b畉n Khoa
h畛c v K畛 thu畉t, H N畛i, nm 1997.
3. L棚 Ch鱈 Hi畛p . K畛 thu畉t i畛u ho kh担ng kh鱈. Nh xu畉t b畉n Khoa h畛c v K畛 thu畉t, HN畛i,
nm 1998
4. Tr畉n Ng畛c Ch畉n . K畛 thu畉t th担ng gi坦. Nh xu畉t b畉n x但y d畛ng, H N畛i, nm 1998
5. Catalogue c叩c m叩y i畛u ho c畛a h達ng Carrier
6. Catalogue c叩c m叩y i畛u ho c畛a h達ng Trane
315
13. 7. Catalogue c叩c m叩y i畛u ho c畛a h達ng Toshiba
8. Catalogue c叩c m叩y i畛u ho c畛a h達ng Mitsubishi
9. Catalogue c叩c m叩y i畛u ho c畛a h達ng Daikin
10. Catalogue c叩c m叩y i畛u ho c畛a h達ng National
11. Catalogue c叩c m叩y i畛u ho c畛a h達ng Hitachi
12. Catalogue c叩c m叩y i畛u ho c畛a h達ng York
13. Catalogue c叩c m叩y i畛u ho c畛a h達ng LG
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16. ASHRAE 1989 Fundamentals Handbook (SI) - Atlanta, GA, 1989
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316