Daikin EWWD800I-SS [37/51] Hydraulic performance
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Daikin EWWD800I-SS [37/51] Hydraulic performance

Daikin EWWD800I-SS [37/51] Hydraulic performance
3
1
9
• Hydronic Systems • Single Unit
37
• Single Unit • Water cooled chiller, standard efficiency • EWWD-I-SS
9 Hydraulic performance
9 - 1 Water Pressure Drop Curve Evaporator/Condenser
EPD_1a-2_Rev.01_1
Size
340 400 460 550 650 700 800 850 900 950 C10 C12 C13 C14 C15 C16 C17 C18
Cooling Capacity (kW)
333 394 460 538 640 705 782 844 910 986 1027 1155 1204 1274 1346 1401 1455 1510
Water Flow (l/s) - Evaporator
15.91 18.82 21.98 25.70 30.58 33.68 37.36 40.32 43.48 47.11 49.07 55.18 57.52 60.87 64.31 66.94 69.52 72.14
Evaporator Pressure Drops (kPa)
37 50 54 62 55 44 58 53 53 66 51 52 56 47 58 62 66 71
Water Flow (l/s) - Condenser
19.33 22.92 26.80 31.44 37.31 41.14 45.53 49.21 53.03 57.52 60.39 67.32 70.33 74.34 78.55 82.08 85.52 89.01
Condenser Pressure Drops (kPa)
26 28 30 26 25 25 28 28 26 23 24 24 24 25 24 24 24 23
Size
360 440 500 600 750 800 850 950 C10 C11 C12
Cooling Capacity (kW)
362 433 506 573 720 795 866 933 976 1038 1134
Water Flow (l/s) - Evaporator
17.30 20.69 24.18 27.38 34.40 37.98 41.38 44.58 46.63 49.59 54.18
Evaporator Pressure Drops (kPa)
64 48 54 68 48 48 47 50 72 46 52
Water Flow (l/s) - Condenser
20.69 24.77 28.95 33.16 41.16 45.42 49.50 51.79 56.14 60.22 65.64
Condenser Pressure Drops (kPa)
48 47 51 66 48 48 47 50 50 65 65
EWWD~I-SS
Pressure Drops
EWWD~I-XS
Water fl ow and pressure drop referred to nominal condition: evaporator water in/out: 12/7°C – condenser water in/out: 30/35°C
Water fl ow and pressure drop refe
rred to nominal condition: evaporator water in/out: 12/7°C – condenser water in/out: 30/35°C
EPD_1a-2_Rev.01_2
Evaporator and Condenser Pressure Drops
To determinate the evaporator or condenser pressure drop for different versions or at different working condition, please refer to the following formula:
PD
2
(kPa) = PD
1
(kPa) x
1.8
where:
Q
2
(l/s)
Q
1
(l/s)
PD
2
Pressure drop to be determinated (kPa)
PD
1
Pressure drop at nominal condition (kPa)
Q
2
water fl ow at new working condition (l/s)
Q
1
water fl ow at nominal condition (l/s)
How to use the formula: Example (evaporator)
The unit EWWD340I-SS has been selected for working at the following conditions:
- evaporator water in/out: 11/6°C
- condenser water in/out: 30/35°C
The cooling capacity at these working conditi
ons is: 322 kW
The evaporator water fl ow at these working conditions is: 15.38 l/s
The unit EWWD340I-SS at nominal working conditions has the following data:
- evaporator water in/out: 12/7°C
- conden
ser water in/out: 30/35°C
The cooling capacity at these working conditions is: 333 kW
The evaporator water fl ow at these working conditions is: 15.90 l/s
The evaporator pressure drop at these working conditions is: 37 kPa
T
he evaporator pressure drop at the selected working condition will be:
PD
2
(kPa) = 37 (kPa) x
1.8
PD
2
(kPa) = 35 (kPa)
15,38 (l/s)
15.90 (l/s)
NOTE - Important
If the calculated evaporator water pressure drop is below 10 kPa or above 100 kPa please contact the factory for dedicated evaporator.

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