摘要
关于风量变化对结霜量影响的研究目前一直存在一定的分歧。本文通过对前人仿真方法和结论的分析,在保证翅片表面温度低于0℃的条件下,用凝水量来反映结霜量的大小,从而将动态模型简化为稳态模型,并在风量变化的同时考虑环境参数的变化以及换热器结构的变化。仿真结果表明风量对结霜量的影响与环境参数密切相关。干球温度的变化虽然影响结霜量的大小,但结霜量最大时对应的风量却不受空气干球温度的影响,临界风量随着相对湿度的增加而增加。另外换热器回路等结构参数也会一定程度地改变风量的影响作用。
Diverge on air flow rate＇ s impact on frosting rate exists for a long time. Previous research are all based on certain heat exchanger structure as well as ambient condition. By com- paring the simulation method and result, builts a steady state distributed parameter model and replaces frosting rate with condensed water rate. The simulation result indicates that the impact on frosting rate is relevant to ambient condition. Frosting is influenced by dry bulb temperature, but the corresponding air flow rate for marimum frosting is not influenced by dry blud temperature, relative humidity has a great impact on critical air flow rate. In addition, the structural parameters of heat exchanger can change the influence of air flow rate.
出处
《制冷与空调》
2007年第4期88-91,95,共5页
Refrigeration and Air-Conditioning
关键词
风量
结霜量
空气源热泵
air flow rate
frosting
air source heat pump
