喷气增焓空气源热泵系统模拟分析

Simulation and Analysis of Air Source Heat Pump Integrated with Enhanced Vapor Injection

为了提高带经济器的喷气增焓空气源热泵系统的性能,建立相关理论模型,模拟分析了不同工况下喷气比、经济器效能以及制冷剂种类对热泵性能的影响。结果表明:制热量和压缩机功率随喷气比的增大而增大,存在最佳喷气比使COP最大,排气温度最小;制热量、压缩机功率以及排气温度随经济器效能的增大而减小,COP随经济器效能的增大而增大;R22,R134A,R410A三种制冷剂在同等条件下,R134A的制热量、压缩机功率和排气温度最小,COP最大,R410A的制热量和压缩机功率最大,COP最小,R22在制热量、压缩机功率以及COP方面介于R134A与R410A之间,但其排气温度是三种制冷剂中最高的。

In order to improve the performance of enhanced vapor injectionair source heat pump system with economizer, a related theoretical model was established to simulate and analyze the effects of vapor injection ratio, economizer efficiency and refrigerant on heat pump performance under different test conditions. The results show that heating capacity and compressor power increase with the increase of vapor injection ratio, there is an optimal vapor injection ratio to maximize COP and the minimum exhaust temperature;heating capacity, compressor power and exhaust temperature decrease with the increase of economizer efficiency, and COP increases with the increase of economizer efficiency;R22, R134A, R410A under the same conditions, R134A has the smallest heating capacity, compressor power and exhaust temperature, the largest COP, R410A has the largest heating capacity and compressor power, and the smallest COP, the performance of R22 in terms of heating capacity, compressor power and COP is between R134A and R410A, but its exhaust temperature is the largest among the three refrigerants.