Cooling of ammonia and water vapor
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This post was last edited by sxf1028102800 on 2018-4-16 23:16. Assuming both are ammonia and water vapor in quantities of 1000 cubic feet each, with a temperature of 150 degrees. When passing through two coolers with identical operating conditions, which is cooled better: ammonia or water vapor? Thank you, points appreciated
Visually, the condensation of ammonia gas and water vapor generally releases more than 2,000 units of heat
Why is ammonia effective for cooling? Could you explain?
The specific heat of water vapor is greater than that of ammonia; therefore, for the same amount of heat removed, the temperature of ammonia drops more than that of water vapor. To turn water vapor into a liquid state, more heat must be removed.
The K value for air coolers can be used as a reference: 625 for ammonia, and 770 for water vapor. Vaporized latent heat water 2441, ammonia 1336. In this case, although the heat obtained from water is 770/625 == 1.23 times that amount, the heat required is 2441/1336 = 1.82 times as much; thus, more heat is needed for ammonia to liquefy