真空与低温
真空與低溫
진공여저온
VACUUM AND CRYOGENICS
2014年
4期
213-218
,共6页
有限时间热力学%不可逆空气制冷机%经济性能
有限時間熱力學%不可逆空氣製冷機%經濟性能
유한시간열역학%불가역공기제랭궤%경제성능
Finite-time thermodynamics%irreversible air refrigeration cycle%exergoeconomic optimization
文章用有限时间热力学理论和方法，研究了恒温热源条件下不可逆空气制冷机的有限时间经济性能，导出了利润率解析式。用数值计算分析了压比、热源温比、热导率分配、压缩机和膨胀机的效率等参数对利润率的影响，并优化了循环压比和换热器的热导率分配。通过价格比，将有限时间经济性能目标与制冷率、熵产率及生态学目标建立了联系。所得结果对实际空气制冷设备的设计有一定指导意义。
文章用有限時間熱力學理論和方法，研究瞭恆溫熱源條件下不可逆空氣製冷機的有限時間經濟性能，導齣瞭利潤率解析式。用數值計算分析瞭壓比、熱源溫比、熱導率分配、壓縮機和膨脹機的效率等參數對利潤率的影響，併優化瞭循環壓比和換熱器的熱導率分配。通過價格比，將有限時間經濟性能目標與製冷率、熵產率及生態學目標建立瞭聯繫。所得結果對實際空氣製冷設備的設計有一定指導意義。
문장용유한시간열역학이론화방법，연구료항온열원조건하불가역공기제랭궤적유한시간경제성능，도출료리윤솔해석식。용수치계산분석료압비、열원온비、열도솔분배、압축궤화팽창궤적효솔등삼수대리윤솔적영향，병우화료순배압비화환열기적열도솔분배。통과개격비，장유한시간경제성능목표여제랭솔、적산솔급생태학목표건립료련계。소득결과대실제공기제랭설비적설계유일정지도의의。
Based on the Finite-time thermodynamic theory and method,the exergoeconomic optimization is carried out on an irreversible air refrigerator coupled with constant-temperature heat reservoirs and the analytical expression of the profit rate is derived. The effects of pressure ratio,heat source temperature ratio,and compressor as well as expander effi-ciencies on the profit rate are analyzed based on numerical examples. The pressure ratio and distribution of heat conduc-tance between two heat exchangers are also optimized. By selecting particular price ratios,the optimization of profit rate can be converted to the optimizations of cooling load,entropy generation rate and ecological function objectives. The re-sults obtained herein may provide some guidelines for the design of air refrigerating machines.
