Condensation Medium
The heat collected by the water cooler, along with the excess of the compressor heat, must be rejected to the radiator. Directly or indirectly, ambient atmospheric air, as a rule, is used as the heat sink. For air coolers, a capacitor consists of refrigerant-to-air coil and one or more fans to circulate outside air through the coil. Performance capacitor depends on the power of the air flow and air's dry bulb temperature.
Air-cooled condenser air flow rates range from 600 to 1200cfm/ton with 10-30F approach between the ambient dry bulb temperature and the temperature of condensation of the refrigerant. For R-22 in typical HVAC applications, condensing temperature is about 105F. Thus, the ambient temperature shall be not more than 95F. ambient air temperature condensing temperature increases, and the net cooling capacity decreases by about 2% for every 5F raising the temperature of condensation.
Water-cooled chillers tend to use the tower to reject the condenser heat in the atmosphere and Cracks. 9-17 this text refer to this subject in detail.
In cooler, with 85F capacitor water supplied from the cooling tower, a condensing temperature drops to 94-98F, reducing the lift required compressor, as well as significantly improve the chiller COP compared to air cooled machines.
Table 1.5 illustrates the relative efficiency and operating costs for different types of electric drive chillers with both air-and water-cooled condensate...
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Chillers