Chilled water absorption refrigeration

Figure 11-19. Lithium bromide hermetic absorption refrigeration system, double effect, liquid chiller/heater. As shown in chilling mode, water is the refrigerant under low absolute pressure (boiling at 40°F) (Used by permission Cat. 521-606, form 16DF-1 PD, 1994. Carrier Corporation, a United Technologies Company.)...

Hot water or steam can also be used in absorption-type chillers to provide chilled water with the reduction in electrical power needed for the refrigeration process. 

Ammonia absorption refrigeration is particularly applicable when low level heat is available for operation of the stripper reboiler and power costs are high. Steam jet refrigeration is the large scale system of choice when chilled water is cold enough, that is above 40T or so. 

The chilled water (7°C) for the absorber is supplied by an absorption refrigeration unit, using heat recovered from the compressor intercooler as the energy source. Heat for ammonia vaporization, as previously noted, is available at 35°C and is recovered from the secondary gas cooler. The system uses circulating condensate as the energy transfer medium. 

Install additional cooling towers, sea water cooling system, air coolers and refrigeration systems install additional cooling headers and pumps Use waste heat at absorption chillers, for producing chilled water... 

FCOJ. Proper reconstitution of FCOJ is essential for valid taste panel results. Since orange juice flavor is of a rather delicate, mild, or light type, the water source used to reconstitute the concentrate must be relatively free of off-flavors, such as sulfurous. Distilled water should be used whenever practical. In addition, if the water used for reconstitution is placed in a refrigerator, walk-in cooler, etc. for chilling, care must be taken to have the water container covered securely to eliminate possible absorption of foreign flavors. And, of course, the reconstituted product itself, if being chilled prior to tasting, should be protected. 

Air-Conditioning Heating Refrigeration Institute. Standard for Absorption Water Chilling and Water Heating Packages-, Arlington, VA, 2000. 

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