| Title |
A Numerical Analysis of a Revised VX Absorption Cooling Cycle |
| Keywords |
Absorption refrigeration ; 흡수식 냉동 ; Ammonia ; water ; 암모니아 ; 물 ; Low temperature heat sources ; 저온열원 ; Cycle simulation ; 사이클 해석 |
| Abstract |
A revised VX cycle using ammonia/water as the working fluid is a cycle which is suitable to produce cooling utilizing low temperature heat sources. The cycle was analyzed numerically to investigate the effects of the design and operating conditions on the performance. It was shown that both COP and cooling capacity were significantly influenced by the performance of the rectifier. Insufficient of the rectifier reduced both ammonia mass fraction and mass flow rate of the vapor entering the condenser, which produced cooling effect in the evaporator. As the temperature and the mass flow rate of the heat source increased, both COP and exergetic efficiency decreased due to the irreversibilities produced in heat exchangers, but cooling capacity did not vary much. Cooling capacity increased significantly as the coolant temperature decreased, although COP and exergetic efficiency remained nearly constant. |