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23
Performance Data
3
rd
Step:
To obtain the TC, SC & PI for
(a) Indoor Condition:
25°C DB, 17°C WB
Outdoor Condition:
37°C DB
EWB
EDB
Outdoor temperature
35°C
37°C
40°C
TC
SC
PI
TC
SC
PI
TC
SC
PI
25
17
1.87
1.63
0.63
x
y
z
1.74
1.52
0.68
By Interpolation Method
⇒
37°C – 35°C
=
x – 1.87kW
40°C – 35°C
1.74kW – 1.87kW
⇒
x = 1.82kW
Similarly
,
y = 1.59kW
z = 0.65kW