Compare the COP of the ammonia refrigeration system of Figure 7.21 to that of the single-stage system
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Compare the COP of the ammonia refrigeration system of Figure 7.21 to that of the single-stage system of Figure 7.20, operating with the same working fluid between the same minimum and maximum cycle pressures, and given that the temperature at the outlet of the direct contact heat exchanger equals 40?C. Assume that the isentropic efficiency of all the compressors is the same and is 0.8.
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saturated vapor Fan Cooling load (100 kW) P/ MPa 10 - 0.1 100 Compressor Evaporator Refrigerated Room 200 Condenser saturated liquid Valve (a) Process flow diagram. 300 h/kJ/kg 3 400 2 Cooling Tower Cooling water Pump 500 (b) The thermodynamic cycle in the P-h diagram of the working fluid.
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Properties of NH3 are calculated with STANMIX The notation is that of Figure 720 and 721 Design Data ...View the full answer
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Related Book For
Thermodynamics Fundamentals And Engineering Applications
ISBN: 9780521862738
1st Edition
Authors: William C. Reynolds, Piero Colonna
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