广义空气源热泵制热/除霜周期的性能模型

Performance Model of General Air Source Heat Pump in a Single Frost / Defrost Cycle

常规空气源热泵和无霜空气源热泵可以统称为广义空气源热泵。本文分析了广义空气源热泵在制热/除霜(再生)过程的物理特征和能耗特点,并应用热力学原理建立了描述一个制热/除霜(再生)周期的热泵性能评价模型,推导出描述制热/除霜(再生)周期内的系统能效比COPs的通用表达式,据此分析不同类型空气源热泵存在性能差异的根本原因和性能优化方向。该模型为无霜空气源热泵技术路线的选择提供了一定的理论支持,同时可为各类空气源热泵的季节性能评价和适用性评判提供新的视角和基础工具。

Conventional air source heat pump and no-frost air source heat pump can be categorized as general air source heat pump. The physical characteristics and energy consumption of general air source heat pump system in a frost / defrost cycle is analyzed based on the first law of thermodynamics and a generalized performance model is deduced,which can be used for the prediction of performance difference and optimization of existing technologies. This model provides not only a theoretical basic for the development of frost-free air source heat pump,but also a basis for annual performance evaluation of air source heat pump systems.