基于有限时间热力学结霜工况热泵性能分析  

Model of Air Source Heat Pump(ASHP) under Frosting Conditions Based on Finite-time Thermodynamics

作　　者：龚光彩[1] 王洪金[1] 吕东彦[1] 苏欢[1] 

机构地区：[1]湖南大学土木工程学院,湖南长沙410082

出　　处：《湖南大学学报（自然科学版）》2009年第S2期4-8,共5页Journal of Hunan University:Natural Sciences

基　　金：湖南省科技计划重点项目基金资助(08GK2016)

摘　　要：研究了结霜工况下蒸发温度变化对空气源热泵性能的影响.依据有限时间热力学内可逆原理,简化了结霜工况下的空气源热泵循环过程,并分析了实际热工过程的最大能效输出.利用CYCLEPAD软件,对结霜工况下的空气源热泵结霜性能进行数值模拟,得到结霜工况下制热量,机组的制热性能系数,压缩机排气温度等性能参数随时间变化的规律.研究表明,当蒸发温度发生骤降时,热泵机组的其他性能参数也随之骤降.因此,蒸发温度的变化能够表征空气源热泵在结霜工况下的运行性能.This paper studied the effect of vaporizing temperature on the dynamic characterics of ASHP under frost.Based on the princinples of finite-time thermodynamics,the complex process of the ASHP heating cycle can be simplified into an abstractive endo-reversible one.A numerical model was built up with the help of software CYCLEPAD,which can represent the variation of the factors such as the heating capacity,COP and the outlet temperature of the compessors with time.The effect of irreversible heat loss in the thermal cycles was analyzed.It shows that tremendous degerations in the above characteriscs all occure at the 60th minute as vaporizing temperature does.This phenomina demonstrates that the degeration of vaporizing temperature reveals the degeration in ASHP performances.

关 键 词：热泵系统 CYPCLEPAD 内可逆循环 结霜模型 

分 类 号：TU831.4[建筑科学—供热、供燃气、通风及空调工程]