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
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