Air-cooled condensers The air-cooled condensers locate purposes in family, advertisement, and commercial refrigerating, chilling, freezing, and air-con structures with a typical potential of 20—120 plenty (Figure three. 18). The centrifugal fan air-cooled condensers (with a capability of 3-100 plenty) are fairly used for warmth restoration and auxiliary air flow functions. actually, they hire outdoors air because the cooling medium. fanatics draw air earlier the refrigerant coil and the latent warmth of the refrigerant is got rid of as brilliant warmth by means of the air flow. some great benefits of air-cooled condensers are: • • • • • • no water requirement, normal outside install, removing of freezing, scaling, and corrosion difficulties, removing of water piping, circulate pumps, and water therapy, low set up fee, and occasional upkeep and repair requirement. nonetheless, they've got a few risks, as given under: • • • • • excessive condensing temperatures, excessive refrigerant expense as a result of lengthy piping runs, excessive energy standards in keeping with kW of cooling, excessive noise depth, and a number of devices required for large-capacity structures. Refrigeration Cycles and structures 133 Evaporative condensers Evaporative condensers are it sounds as if water-cooled designs and paintings at the precept of cooling by way of evaporating water right into a relocating air move. The effectiveness of this evaporative cooling approach is dependent upon the rainy bulb temperature of the air coming into the unit, the amount of ventilation and the potency of the air/water interface. Evaporative condensers use water sprays and ventilation to condense refrigerant vapors contained in the tubes. The condensed refrigerant drains right into a tank known as a liquid receiver. Refrigerant subcooling could be finished by means of piping the liquid from the receiver again throughout the water sump the place extra cooling reduces the liquid temperature even additional. In an evaporative condenser (Figure three. 19a), the fluid to be cooled is circulated contained in the tubes of the unit's warmth exchanger. warmth flows from the method fluid throughout the coil tubes to the water outdoors, that's cascading downward over the tubes. Air is pressured upward throughout the coil, evaporating a small percent of the water, soaking up the latent warmth of vaporization, and discharging the warmth to the ambience. the rest water falls to the sump to be recirculated by way of the pump, whereas water entrained within the air flow is reclaimed and again to the sump via the mist eliminators on the unit discharge. the one water fed on is the volume evaporated plus a small volume that is deliberately bled off to restrict the focus of impurities within the pan. With the non-compulsory prolonged floor coil the recirculating water pump may be close off and the unit operated dry in periods of belowdesign ambient temperatures. Air remains to be compelled upward in the course of the coil, however the warmth is now dissipated to the ambience by way of brilliant cooling by myself. the next are a few features of those condensers: • * * • • * diminished circulating water for a given capability, water therapy is critical, decreased area requirement, smal piping sizes and brief total lengths, smal approach pumps, and availability of enormous ability devices and indoor configurations.