Performance Optimization of Irreversible Air Heat Pumps Considering Size Effect

被引:0
作者
BI Yuehong [1 ,2 ]
CHEN Lingen [3 ]
DING Zemin [3 ]
SUN Fengrui [3 ]
机构
[1] Institute of Civil & Architectural Engineering, Beijing University of Technology
[2] Beijing Key Laboratory of Green Built Environment and Energy Efficient Technology
[3] Institute of Thermal Science and Power Engineering, Naval University of Engineering
基金
中国国家自然科学基金;
关键词
Irreversible Air Heat Pump; Thermodynamic Optimization; Heating Load Density; Size Effect; Finite Time Thermodynamics;
D O I
暂无
中图分类号
TB657.2 [空调器];
学科分类号
0807 ; 080705 ;
摘要
Considering the size of an irreversible air heat pump(AHP), heating load density(HLD) is taken as thermodynamic optimization objective by using finite-time thermodynamics. Based on an irreversible AHP with infinite reservoir thermal-capacitance rate model, the expression of HLD of AHP is put forward. The HLD optimization processes are studied analytically and numerically, which consist of two aspects:(1) to choose pressure ratio;(2) to distribute heat-exchanger inventory. Heat reservoir temperatures, heat transfer performance of heat exchangers as well as irreversibility during compression and expansion processes are important factors influencing on the performance of an irreversible AHP, which are characterized with temperature ratio, heat exchanger inventory as well as isentropic efficiencies, respectively. Those impacts of parameters on the maximum HLD are thoroughly studied. The research results show that HLD optimization can make the size of the AHP system smaller and improve the compactness of system.
引用
收藏
页码:223 / 229
页数:7
相关论文
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