摘要
将喷射器应用于直膨式太阳能热泵,通过热力学第一定律和第二定律进行理论研究。分析了喷射器的接受室压降和太阳辐照强度对喷射器的性能及系统性能的影响,并对系统中各部件的火用损和火用损率进行了分析。结果表明:在本文设计模拟工况下,优化的循环系统性能要优于常规循环,COP最大提高率为10.84%,制热量最大提高率为24.17%,接受室存在最优压降使得系统性能最优,太阳辐照强度的增加使得系统性能得到优化,集热器/蒸发器的火用损占比最大,集热器/蒸发器与压缩机的节能潜力最大。
This paper proposes that ejector is applied in direct expansion solar assisted heat pump water heater（ DX-SAHP）, conducts theoretical study based on the first law and second law of thermodynamics. The performance of ejector and system is analyzed through different pressure drops in the suction chamber of ejector and the solar radiation intensity, and the exergy destruction and exergy destruction rate of various components are analyzed simultaneously. Under the given conditions,results show that optimized cycle outperforms conventional cycle in the COP and heating capacity,COP maximum improvement ratio is 10. 84%,heating capacity maximum improvement ratio is 24. 17%,optimum values of pressure drops exist making system performance optimal,the increase of solar radiation intensity benefits the optimized cycle,the collector/evaporator exergy destruction rate is largest,the energy saving potential of the collector/evaporator and the compressor are the largest.
作者
刘业凤
余军
LIU Ye-feng;YU Jun(School of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)
出处
《建筑节能》
CAS
2018年第6期38-43,共6页
BUILDING ENERGY EFFICIENCY
基金
上海市浦江人才计划资助(17PJ1407200)
关键词
喷射器
直膨式太阳能辅助热泵
能量分析
火用分析
ejector
Direct Expansion Solar Assisted Heat Pump （DX -SAHP）
energy analysis
exergy analysis
