热泵驱动空调方式的理想性能系数对比研究  

Comparison analysis of ideal performance coefficients for different heat pumps driving air conditioning modes

作　　者：彭冬根[1] 徐少华 罗丹婷[1] Peng Donggen;Xu Shaohua;Luo Danting(School of Civil Engineering And Architecture,Nanchang University,Nanchang 330031,China)

机构地区：[1]南昌大学建筑工程学院,南昌330031

出　　处：《农业工程学报》2018年第B11期73-80,共8页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家自然科学基金项目(51766010);江西省研究生创新专项资金项目(YC2018-S122)

摘　　要：溶液除湿与热泵混合(liquiddehumidificationandheatpumphybridsystem,LDHP)系统、温湿度独立控制(temperature-humidity independent control system, THIC)系统以及传统热泵(heat pump system, HP)系统是目前研究较多的空调方式。该文通过构建3种空调方式的理想可逆过程,采用数值模拟的方法研究了上述系统的性能系数能达到的理论最大值。并对送风温差、热湿比和室内外环境空气参数的变化对系统性能系数的影响展开研究。结果表明,理想情况下增加送风温差或降低热湿比均会导致系统性能系数降低,且3种系统性能系数受送风温差影响更为明显。3种系统的性能系数均随着室内设计温度或相对湿度的增加而增大,在整个模拟范围内增长近1倍;而室外环境温度或相对湿度增加均会使3种系统性能系数(coefficient of per formance, COP)降低;其中室内外温度变化对系统性能系数影响较相对湿度更为明显。在模拟条件下,LDHP系统的性能系数均是最大,HP系统次之,THIC系统最低。该文研究成果对此3种空调方式的选择及优化提供了理论依据。The liquid dehumidification and heat pump hybrid(LDHP)system,the temperature-humidity independent control(THIC)system and traditional heat pump(HP)system have been being studied by researchers.In the LDHP system,the supply air was cooled by heat pump firstly and then was sent to the dehumidifier for dehumidification,finally the air after dehumidification was sent to the indoor environment.The heat and mass transfer in dehumidifier and regenerator would release/absorb moisture latent heat;therefore,heat absorption/extraction through a heat pump could be used to achieve isothermal dehumidification/regeneration in an ideal process.In the THIC system,the liquid dehumidification system was adopted to handle the fresh air and part of the return air,which was utilized to deal with the entire latent heat load indoors.Meanwhile,the rest of return air was cooled by the heat pump so as to remove indoor sensible heat load.In the ideal HP system,the outdoor air was preheated by indoor exhaust air in the total heat exchanger,and then mixed with return air,Then the mixed supply air was cooled and condensate by the heat pump.Under ideal conditions,the process from reheating the air under dew point to reach the air supply state was able to absorb heat from outdoor by the ideal heat engine in which the air under dew point was heated and output work yielded at the same time.In this paper,models of ideal reversible process were constructed to analyze the theoretical maximum of the coefficient of performance(COP)for the above-mentioned system under different conditions.Meanwhile,the influences of different supply air temperature,enthalpy humidity ratio,indoor and outdoor environmental air conditions on the COP of those system were also discussed.Results indicated that increasing the supply air temperature difference or reducing the enthalpy humidity ratio would decrease the COP of three mentioned systems in ideal condition,and simultaneously the COP was more significantly affected by the supply air temperature difference.When the ent

关 键 词：热泵 温度 湿度 理想工况 溶液除湿 温湿度独立控制 性能系数 

分 类 号：T831.6[一般工业技术]