Airwell Wespak 2.69 [15/28] Cooling capacity
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Airwell Wespak 2.69 [15/28] Cooling capacity

Airwell Wespak 2.69 [15/28] Cooling capacity
Page 15
Cooling Capacity
25
20
10
15
5
5
10
15
20
25
30
35
0
0
35791113
4
5
6
7
Entering water temp. (°C)
E
D
C
A
B
0
10
20
30
40
22
28 32
15 16 17 19 21 22
10
3
kcal/h
kW
0
10
20
30
10
3
kcal/h
kW
5
0
10
15
10
3
kcal/h
kW
0
10
5
20
15
Unit size
2.69 3.991.39
Unit sizes
2.69 3.991.39
Cooling Capacity
(kcal/h)
Cooling capacity
(kW)
Wet bulb temperatures (°C)
24
26
t
30
Data are given for humidity level of 40 to 60 %
Sizes
1.39
2.69
3.99
500
-
- 3 300
1 000
1 650
2 200 4 050
-
1 500
2 500
1 850
3 000
-
-
Air flow (m
3
/h)
A B C D E
Dry bulb temperatures (°C)
Given : Capacity of a 2.69 unit, air flow : 2500 m
3
/h, dry bulb temperature : 24 °C, wet bulb temperature : 19 °C, water : 7/12 °C.
Draw a vertical line upward from the inlet water temperature (7 °C) to the curve of ∆t = 5 °C.
Draw a horizontal line from this point, and then draw 2 verticals downward from the crossing points of both curves DB 24 °C and WB 19 °C
to the curve C corresponding to the required air flow (2500 m
3
/h).
At the side scale, read the total capacity (15420 W) and the sensible capacity (10285 W).
Calculate the water flow : 15420 x 0.86 / 1000 / (12 - 7) = 2.65 m
3
/h.
Read pressure drop on chart page 17.
Example of selection

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