47
(b) Indoor Condition:
25°C DB, 16°C WB
Outdoor Condition:
35°C DB
EWB
EDB
Outdoor temperature
35°C
TC
SC
PI
19
24
29.18 18.11
9.99
25
x
2
y
2
z
2
27
29.30 21.10 10.00
By Interpolation Method
25°C – 24°C
=
x
2
– 29.18kW
27°C – 24°C
29.30kW – 29.18kW
x
2
= 29.22kW
Similarly
,
y
2
= 19.11kW
z
2
= 9.99kW
Repeat the same process for (c) & (d) in 1
st
Step
(c) x
3
= 24.78kW; y
3
= 22.37kW; z
3
= 10.68kW
(d) x
4
= 26.82kW; y
4
= 17.83kW;
z
4
= 10.84kW
2
nd
Step:
To obtain the TC, SC & PI for
(a) Indoor Condition:
25°C DB, 17°C WB
Outdoor Condition:
35°C DB
EWB
EDB
Outdoor temperature
35°C
TC
SC
PI
16
25
26.93 24.04
9.85
17
x
5
y
5
z
5
19
29.22 19.11
9.99
By Interpolation Method
17°C – 16°C
=
x
5
– 26.93kW
19°C – 16°C
29.22kW – 26.93kW
x
5
= 27.69kW
Similarly
,
y
5
= 22.40kW
z
5
= 9.90kW
Repeat the same process for (b) in 2
nd
Step
(c) x
6
= 24.46kW; y
6
= 20.86kW; z
6
= 10.73kW
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
27.69 22.40
9.90
x
y
z
24.46 20.86 10.73
By Interpolation Method
37°C – 35°C
=
x – 27.69kW
40°C – 35°C
24.46kW – 27.69kW
x = 226.40kW
Similarly
,
y = 21.78kW
z = 10.23kW