. Commercial cooling of fruits and vegetables. Fruit; Fruit; Vegetables. Demister pads COOLED SPACE Closely spaced filaments or other packing Falling spray forms or melts ice on refrigerated coils Fan Pump Low-level float switch stops refrigeration when available water is frozen on coils. Ice load is controlled by water overflow or manual refill. Freezing inhibitor (if used) controls temperature. Fig. 28. A packed cooling tower in which cold water is sprayed over packing and air counter-flows through tower for cooling. Various types of packing material can be used to produce good contact betye
. Commercial cooling of fruits and vegetables. Fruit; Fruit; Vegetables. Demister pads COOLED SPACE Closely spaced filaments or other packing Falling spray forms or melts ice on refrigerated coils Fan Pump Low-level float switch stops refrigeration when available water is frozen on coils. Ice load is controlled by water overflow or manual refill. Freezing inhibitor (if used) controls temperature. Fig. 28. A packed cooling tower in which cold water is sprayed over packing and air counter-flows through tower for cooling. Various types of packing material can be used to produce good contact betyeen air and water in a limited space. In California, an arrange- ment of horizontally-stretched plastic filaments is widely used. Wood-slat or plastic demisters remove water droplets from the air, which en- ters the cooler or storage in ideal condition (fig. 28). Prefabricated towers can be purchased com- plete with fans, packing, and demisters, or they can be constructed from purchased materials and components. Ice accumulators used with packed towers Packed cooling-tower systems can be supplied with cold water from a tank containing mechan- ically refrigerated coils on which ice forms when the refrigeration load is light and melts when the load is heavy. Since the refrigeration system can operate continuously, it needs only a frac- tion ol the capacity that would be needed if it were required to cool an entire day's production during a few hours on a hot day. (Provision is often made for cooling the water with purchased ice in case of failure of the mechanical system.) Water must be circulated in the tank by a pro- peller, or agitated with air, to melt ice evenly. As an alter native arrangement, a refrigerated (oil may he used over which water flows from above, and which accumulates ice. This system Occupies more space than a coil in the: tank but good heat transfer between water and ice is assured without special agitation. A device that senses the thickness of the ice and st
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Keywords: ., bo, bookcentury1900, bookpublisherberkeley, booksubjectvegetables
