CAJ | 학술논문

R32涡旋压缩机存在排气温度过高的问题，利用两相制冷剂喷射可降低排气温度同时提升性能。基于经济器系统，提出了R32涡旋压缩机的两相喷射制冷系统，利用模拟仿真对其设计和控制方法进行了研究。从压缩机的角度，分析了喷射口等效直径对两相喷射压缩机性能的影响，并指出了两相喷射时喷射压力和喷射干度的优化方向。通过对两相喷射系统的模拟分析，在系统层面上对中间换热器的换热能力进行了优化配置和对中间喷射压力进行了优化控制，并提出根据排气温度来确定最优中间压力的方法，即将排气温度控制为135℃对应的中间压力为最优中间压力。经过优化后的两相喷射系统，不仅解决了排气温度过高的问题，而且能够提升制冷量7.1％~11.4％，提升COP 2.6％~6.2％。
R32와선압축궤존재배기온도과고적문제，이용량상제랭제분사가강저배기온도동시제승성능。기우경제기계통，제출료R32와선압축궤적량상분사제랭계통，이용모의방진대기설계화공제방법진행료연구。종압축궤적각도，분석료분사구등효직경대량상분사압축궤성능적영향，병지출료량상분사시분사압력화분사간도적우화방향。통과대량상분사계통적모의분석，재계통층면상대중간환열기적환열능력진행료우화배치화대중간분사압력진행료우화공제，병제출근거배기온도래학정최우중간압력적방법，즉장배기온도공제위135℃대응적중간압력위최우중간압력。경과우화후적량상분사계통，불부해결료배기온도과고적문제，이차능구제승제랭량7.1％~11.4％，제승COP 2.6％~6.2％。
To overcome the disadvantage of high discharge temperature in R32 compressor, two-phase refrigerant injection was proposed to decrease discharge temperature as well as improve system performance in severe conditions, and an improved injection system with e-conomizer was proposed to realize two-phase injection. Based on the validated dynamic distributed parameter model of R32 scroll compres-sor, the optimization of heat transfer capability of internal heat exchanger and intermediate pressure according to system performance and discharge temperature were discussed. Through the optimized design and control of the two-phase injection system, the cooling capacity was enhanced by 7. 1% -11. 4% and COP was improved by 2. 6% -6. 2%.