摘要
为了优化带经济器的R32空气源热泵系统的制热性能,结合涡旋压缩机的结构以及实际运行特点,本文利用MATLAB建立了系统的数学模型,并通过实验数据验证了仿真结果,研究了在不同环境温度下系统的补气压力、准一级压缩内容积比对相对喷气量的影响。研究结果表明:经济器系统较普通热泵系统,更适宜在环境温度低于-10℃的工况下运行;R32经济器热泵系统制热模式的最佳结构和运行参数为:系统的准一级压缩内容积比为1.1时,压缩机的相对喷气量值最大;当环境温度低于-10℃时,最佳相对喷气量宜取为0.22~0.33;当环境温度为-10~-5℃时,最佳相对喷气量宜取0.20~0.22;当环境温度高于-5℃时,则宜为0.18~0.20。相应的最佳相对喷气压力在0.85~1.31之间,处在最佳补气参数范围内,经济器热泵系统的优势越明显。
This study aimed to optimize the heat production performance of an enhanced vapor injection air-source heat pump system with R32.Combined with the structure and actual operation characteristics of a scroll compressor system,a complete mathematical model was established and programmed using MATLAB.After verification of the simulation results with experimental data,the influences of the vapor injection pressure of the system,and the specific volume ratio of the quasi-one-stage compression on the relative vapor injection volume of the system were explored under different ambient temperatures.It was found that the vapor injection heat pump system is more suitable for operation at ambient temperatures of below-10℃than an ordinary heat pump system.The optimal operating range of the heating mode of the air-source heat pump system with vapor injection was obtained.Because the specific volume ratio of the quasi-one-stage compression of the system is 1.1,the relative vapor injection volume is the maximum.When the ambient temperature is below-10℃,within-10--5℃or above-5℃respectively,the optimal relative injection volume should be within 0.22-0.33,0.20-0.22 and 0.18-0.20 respectively.The corresponding optimal relative inject pressure ranges 0.85-1.31.Within the range of the optimal vapor injection parameters,the advantages of the enhanced vapor injection air-source heat pump system with R32 are obvious.
作者
张童
赵蕾
李延
Zhang Tong;Zhao Lei;Li Yan(School of Building Services Science and Engineering, Xi′an University of Architecture and Technology , Xi′an,710000,China;Xi′an Johnson Industrial Co.,Ltd., Xi′an, 710075,China)
出处
《制冷学报》
CAS
CSCD
北大核心
2021年第1期117-125,共9页
Journal of Refrigeration
基金
国家自然科学基金(51878535)资助项目。
关键词
经济器
空气源热泵
低环温
R32
涡旋压缩机
vapor injection
air-source heat pump
low ambient temperature
R32
scroll compressor
