寒冷地区双级压缩供暖的优化研究  

Study on Optimization of Two-Stage Compression Heating in Cold Area

作　　者：单宝琦 刘芳[1] 王宗伟 Shan Baoqi;Liu Fang;Wang Zongwei

机构地区：[1]山东建筑大学热能工程学院

出　　处：《洁净与空调技术》2019年第3期35-38,共4页Contamination Control & Air-Conditioning Technology

摘　　要：北方寒冷地区的“煤改电”工程主要应用双级压缩的空气源热泵,与传统的单级压缩热泵相比具有压缩比小、排气温度低、COPh高的优点;为进一步提高双级压缩的性能,利用MATLAB结合REFPROP软件对R410A制冷剂在一级节流中间完全冷却的双级压缩中进行模拟。分析蒸发温度、冷凝温度以及制冷剂流量变化时对制热性能产生的影响,以及这些基本参数变化时对应的最佳工况点,结果发现当蒸发温度在-30℃^-20℃(-18℃^-10℃)之间变化时,最佳中间温度在9℃~11℃(13℃)之间;冷凝温度在35℃~50℃之间变化时,最佳中间温度在9℃~13℃之间;控制高压级的质量流量在2.8kg/s;当室外温度在超低温工况(低温工况)范围内,控制低压级质量流量在1.9kg/s(2.0kg/s),能使两级压缩的性能达到最佳状态。In the coal power conversion project in the cold region of north China, the main application of two-stage compression air source heat pump, compared with the traditional single-stage compression heat pump has the advantages of compression ratio small exhaust temperature COPh high;In order to further improve the performance of the two-stage compression using the MATLAB software REFPROP for R410A refrigerant in the middle of the primary throttling cool completely in the two-stage compression condensation temperature and evaporation temperature refrigerant flow simulation analysis the impact of change on the heating performance, as well as the basic parameters change corresponding to the best working point, the results showed that when the evaporation temperature in the 20-30 (18-10) change, the best middle temperature between September 11 (13);The optimum temperature is between 35 and 50.

关 键 词：两级压缩 空气源热泵 中间完全冷却 R410A 中间温度 COP 

分 类 号：TU832[建筑科学—供热、供燃气、通风及空调工程]