摘要
在空气源热泵冷热水机组各部件模型的基础上,基于质量守恒定律、动量守恒定律和能量守恒定律,将这些部件模型有机地结合起来,建立了机组结霜工况下的动态数学模型.采用该模型对机组在不同工况下的性能进行了模拟分析,得到了风量、空气侧压降以及水侧换热器换热量、压缩机的轴功率等随结霜时间的变化.模拟结果表明,随着结霜量的增加,空气侧换热器的换热量减小,风量也将逐渐减小,而阻力却迅速增加;水侧换热器的换热量减小,水流量也减小.这为正确选择机组以及采取有效的除霜控制方式提供了依据.
A dynamic mathematical model of an air source heat pump water chiller/heater （ASHPWCH） under frosting was developed by connecting several of its component models according to principles of mass, momentum and energy conservation. The performances such as air flow, airside pressure drop, waterside heat exchange and power consumed by compressor vs. frosting time under different condition, were simulated and analyzed by using the ASHPWCH model developed. The simulation results indicated that the air flow, airside pressure drop, water flow and flux of heat exchange in water side decreased with the increase of frosting time, and the airside pressure increased. This will provide a basis for the correct selection of ASHPWCH unit and effective measures for its defrosting control.
出处
《湖南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2006年第1期29-32,共4页
Journal of Hunan University:Natural Sciences
基金
国家自然科学基金资助项目(50278021)
关键词
空气源热泵冷热水机组
结霜
除霜
动态数学模型
air source heat pump water chiller/heater
frosting
defrosting
dynamic mathematical model
