一种用于低温环境下新型空气源热泵循环研究

Cycle Analysis of Heating and Refrigeration in New Air-source Heat Pump

提出了一种在低温环境下能扩大制热能力空气源热泵装置,既可按传统单级空气源热泵方式运行,又可按复叠循环方式运行。在低温环境下对两种空气源热泵循环特性进行模拟比较。模拟结果表明,在环境温度很低条件下,该热泵仍可获得较大制热量和较高COP值,并具有较小压缩比和较低压缩机排气温度。热泵制热应在最佳节能控制条件下运行以实现最大限度节能。它为解决热泵的低温适用范围和低温条件下节能等问题提供了一条可取的途径。

An air source heat pump operating in cascade cycle way was presented. The new-type heat pump can operate not only in a single-stage cycle, but also in a cascade cycle. The operation performance of the heat pump was stimulated. The results indicate that, in the extremely cold conditions, the heat pump obtains large heating, high COP, small compression ratio, and low discharge temperature. For heating, the heat pump operates in conditions of optimal control to maximize energy-saving. It provides a favorable approach for extending the applicable range of the heat pump and conserving energy in cold regions.