|
| |
| |
| The Net refrigeration capacity in tons shall be obtained by the following equation: |
| |
| Net refrigeration capacity (TR)= |
m*Cp (tin-tout) |
|
|
|
|
| |
3024 |
|
|
| |
| Where |
m = mass flow rate of chilled water, kg/hr |
| |
Cp = Specific heat, Kcal/Kg °C |
| |
tin = Chilled water temperature at evaporator inlet °C |
| |
tout= Chilled water temperature at evaporator outlet °C |
|
| |
The energy efficiency of a chiller is commonly expressed in one of the three following rations: |
| |
| Coeffcient of performance |
| COP = |
kw refrigeration effect |
|
|
|
|
| |
KW input |
|
|
| |
| Energy efficiency ratio |
| EER = |
Btu/h refrigeration effect |
|
|
|
|
| |
Watt input |
|
|
| |
| Power per Ton |
| |
kW/Ton = kW input |
|
|
|
|
| |
Tones refrigeration effect |
|
|
|
|
|
| |
| CONVERSION FACTOR |
| To Convert |
From |
To |
Multiply By |
| |
cm |
inch |
0.3937 |
| |
cm |
metre |
0.01 |
| |
feet |
cm |
30.48 |
| |
feet |
metre |
0.3048 |
| |
metre |
cm |
100 |
| |
metre |
feet |
3.281 |
| |
metre |
inch |
39.37 |
| |
metre |
km |
0.001 |
| |
mm |
cm |
0.1 |
| |
mm |
inch |
0.03937 |
| |
sq ft |
sq m |
0.0929 |
| |
sq ft |
sq cm |
|
|
| |
| |
| CONVERSION FACTOR |
| Pressure |
atmosphere |
cm of mecury |
76 |
| |
atmoshpere |
in of mercury |
29.92 |
| |
atmoshpere |
kg/sq cm |
1.0333 |
| |
atmoshpere |
kPa |
101. 325 |
| |
BTU |
kg calories |
0.252 |
| |
BTU |
h-p/hr |
3.927x4 |
| |
BTU |
KW/hr |
|
| |
|
atmosphere |
0.03342 |
| |
in of mercury |
kg/sq cm |
0.03453 |
| |
in of mercury |
lb/sq ft |
70.73 |
|
| |
| |
| MASS |
foot pound |
BTU |
1.286 x 10x3 |
| |
foot pound |
horsepower/hr |
5.050 x 10x3 |
| |
|
kilogram calories |
3.241 x 10x4 |
| |
foot pound |
kilogram metre |
0.1383 |
| |
|
kilowatt/hr |
3. 766 x 10x7 |
| |
kgs/sq cm |
atmoshphere |
0.9678 |
| |
kgs/sq cm |
in of mercury |
28.96 |
| |
kgs/sq cm |
ibs/sq ft |
2048 |
|
| |
| |
| To Convert |
From |
To |
Multiply By |
| Power / |
hp |
BTU/min |
42.44 |
| Energy |
hp |
kg cal/min |
10.7 |
| |
hp |
KW |
0.7457 |
| |
h-p |
watts |
745.7 |
| |
hp (boiler) |
BTU/h |
33.479 |
| |
hp (boiler) |
KW |
9.803 |
| |
KW |
BTU/min |
56.869 |
| |
KW |
foot lb/min |
4.425x10x4 |
| |
KW |
h-p |
1.341 |
| |
KW |
kg cal/min |
14.33 |
| |
KW |
watt |
1000 |
| |
KW-hrs |
BRU |
3415 |
| |
KW-hrs |
foot lbs |
2.655x106 |
| |
KW-hrs |
h-p hrs |
1.340 |
| |
KW-hrs |
kg calories |
860.5 |
| |
KW-hrs |
kg metres |
3.671x105 |
| |
watts |
BRU/min |
0.05692 |
| |
watts |
feet lb/min |
44.253 |
| |
watts |
foot lb/sec |
0.7376 |
| |
watts |
h-p |
1.341x103 |
| |
watts |
kg cal/min |
0.01434 |
| |
watts |
KW |
0.001 |
| |
watts-hrs |
BTU |
3.415 |
| |
watts-hrs |
foot lb |
2655 |
| |
watts-hrs |
h-p/hrs |
1.341x103 |
| |
watt-hrs |
kg calories |
0.8605 |
| |
watts-hrs |
kg metres |
367.1 |
| |
watts-hrs |
KW hrs |
103 |
|
| |
| |
| TEMP |
Tem (0C) +273 |
Abs temp (0C) |
1 |
| |
Tem (0C) + 17.78 |
Tem (0F) |
|
| |
Tem (0F) + 460 |
Abs temp (0F) |
1 |
| |
Tem (0F) - 32 |
Tem (0C) |
5/9 |
|
| |
| 17-02-2011 |
