ESIE10-01 General Outline
Part 1 – System Outline 1–81
3
1
4
5
EWAD~C-PS
EWAD~C-PL
Water flow and pressure drop referred to nominal condition: evaporator water in/out: 12/7°C –
condenser air inlet: 35°C.
EWAD~C-PR
Water flow and pressure drop referred to nominal condition: evaporator water in/out: 12/7°C –
condenser air inlet: 35°C.
To determinate the pressure drop for different versions or at different working conditions.
Please refer to the following formula:
Where:
Q PD
2
Pressure drop to be determinate (kPa)
Q PD
1
Pressure drop at nominal condition (kPa)
Q Q
2
Water flow at new working condition (l/s)
Q Q
1
Water flow at nominal condition (l/s)
How to use the formula: Example
Q The unit EWAD650C-SS has been selected for working at the following conditions:
• Evaporator water in/out: 11/6°C
• Condenser air inlet: 46°C
Q The cooling capacity at these working conditions is: 536 kW
Q The water flow at these working conditions is: 25.61 l/s
Q The unit EWAD650C-SS at nominal working conditions has the following data:
• Evaporator water in/out: 12/7°C
• Condenser air inlet: 35°C
Q The cooling capacity at these working conditions is: 647 kW
Q The water flow at these working conditions is: 30.90 l/s
Q The pressure drop at these working conditions is: 73 kPa
820 890 980 C11 C12 C13 C14
Cooling Capacity (kW) 821 890 975 1074 1158 1279 1390
Water Flow (l/s) 39.22 42.53 46.6 51.30 55.31 61.12 66.41
Pressure Drops (kPa)57653061696073
820 890 980 C11 C12 C13 C14
Cooling Capacity (kW) 809 875 956 1053 1132 1251 1359
Water Flow (l/s) 38.65 41.81 45.69 50.30 54.11 59.76 64.95
Pressure Drops (kPa)56632959665870
PD
2
(kPa) = PD
1
(kPa) x
1.8
Q
2
(l/s)
Q
1
(l/s)
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