FORM
SAMPLE SELECTION
Water Cooled Condenser (YCWS)
GIVEN – Chill 200 GPM of water from 56ºF to 44ºF and 0.0001 evaporator fouling factor with 85ºF to 95ºF con- densing water available. Fouling factor of 0.0005 spe- cial field for the condenser.
FIND – The required unit size capacity, kW, EER, and water pressure drop.
SOLUTION:
1.Chilled water range = 56ºF - 44ºF = 12ºF and correc- tion factors are 1.0133 for Tons and 0.9993 for kW for the cooler.
2. Capacity (tons) = | GPM x Chilled Water Range | ||
| 24 | ||
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= | 200 x 12 | = 100TR | |
| 24 | ||
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2.From the rating, a model YCWS0120SC has a ca- pacity range required. For the cooler leaving water temperature of 44ºF and a condenser leaving water temperature of 95ºF, the unit capacity rating table in- dicates:
Tons = 110.3
KW = 86.2
EER = 15.4
Correcting for the 12ºF chilled water range and the 0.0005
Tons | = 110.3 x 1.0133 x 0.9961 = 111.3TR |
KW | = 86.2 x 0.9993 x 1.0065 = 86.7 |
The unit is suitable.
3.Determine the average full load kW and EER at 95.0 Tons
95.0X (86.7) = 74KW
111.3
EER = | Tons x 12 | = 95.0 X 12 = 15.4 | |
Kw | 74 | ||
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4. Determine the cond. Heat rejection as follows:
Heat Rejection (MBH) = (Tons x 12) + (kW x 3.415)
=(95.0 x 12) + (74 x 3.415)
=1140 + 253
=1393
5.Determine GPM condensing water as follows:
MBH x2
GPM Condenser Water = Cond Water Range
6.From curves on pages 10 and 11, the pressure drops with 200GPM through the cooler and 288 through the condenser of the Model YCWS120SC
Cooler Pressure Drop at 200 GPM = 2.9ft Condenser Pressure Drop at 288 GPM = 5.5ft
YORK INTERNATIONAL | 13 |
