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DATA WITH REFERENCE TO WATER REQUIRED FOR REFRIGERATION AND AIR CONDITIONING SYSTEMS CONVERSION EQUIVALENT 1 » B.T.U. * Heat required to raise 1 deg* F. 1 lb* of water REFRIGERATION One ton of refrigeration la the heat equivalent to the melting of One Tern of lee at 58° F. in 24 hours* A ton of refrigeration will absorb 200 B.T.U. per minute or 12,000 B*T*U* per hoar. When waste water is used to eool a refrigeration eon* denser, all the heat which is absorbed by the refrigeration system from the cooled space must be picked up and dissipated by the waste water* When City water at a reasonable temperature of 75° or 80° is used for cooling a refrigeration system a maximum rise of 12° can be allowed for water through a refrigeration condenser before the head pressure becomes excessive, and the brake horse-power on the motor becomes excessive. The maxi* m m rise in the temperature of the water before it is wasted for efficient operation of the refrigeration system determines the minimum amount of water wasted per ton of refrigeration* All facts are proven by our moat simple mathematics as stated above in our standard "Conversion Equivalent of 1 B.T.U. • and "Definition of Refrigeration"» For examplet If one ton of refrigeration is equal to 200 B.T*U* per m&*and 1 B.T.U. will raise the temperature of 1 1b. of water 1 deg* F. and we can stand a 12° rise in the water before it Is wasted, we divide 200 B.T.U. by 12° F. v2j0f0l « 16*66 lbs. of water must be wasted per ton of refrigeration, 16*66 lbs. of water a 2 gallons* This is a minimum amount of water wasted per ton of refrigeration. A greater amount of water wasted is the usual practice* When a cooling tower or evaporative condenser Is used and the water is recovered and recirculated, a much greater quantity of water is circulated per ton of refrigeration per min. for the simple reason that a maximum rise of 6° to 10" is the usual practice, but due to the fact that the only water wasted is by evaporation* drift and continuous drain, the recirculating system” will save approximately 26^ of water as compared to the waste water system* Difference of opinion will be expressed by some manufacturers and salesmen of cooling tower and evaporative condenser recirculating systems with exaggerated claims up to as high as 98# to 98# of the water saved* These claims are