CAJ | 학술논문

目前车用空调冷凝器均为平行流冷凝器,作为热泵蒸发器时易结霜,且化霜时排水不畅.而圆管翅片换热器换热性能较差,难以满足结构布置要求.开发了?5管径的小管径换热器,与平行流换热器进行了性能对比测试.结果表明:采用小管径管片式换热器时,制冷模式下COP提高了17.4%~23.7%,热泵模式下COP提高12.6%~35.8%,且在热泵模式下可降低压缩机排气温度15~28℃.小管径管片式换热器在电动汽车热泵系统应用前景广阔.
목전차용공조냉응기균위평행류냉응기,작위열빙증발기시역결상,차화상시배수불창.이원관시편환열기환열성능교차,난이만족결구포치요구.개발료?5관경적소관경환열기,여평행류환열기진행료성능대비측시.결과표명:채용소관경관편식환열기시,제랭모식하COP제고료17.4%~23.7%,열빙모식하COP제고12.6%~35.8%,차재열빙모식하가강저압축궤배기온도15~28℃.소관경관편식환열기재전동기차열빙계통응용전경엄활.
The parallel flow microchannel (PFM) heat exchanger is widely used in automotive air conditioning system, but it has the disadvantage of easy-frost and difficult in water-drain in defrost . The traditional tube and fin heat exchanger can overcome the frost and defrost problem but has low efficiency. In this paper a ?5 tube and fin heat exchanger is developed for the automotive heat pump. Performances of small diameter tube-and-fin heat exchanger and PFM heat exchanger are compared based on benchmark test. Results show that the system with small diameter tube-and-fin heat exchanger has 17.4%~23.7% higher COP in air conditioning mode, 12.6%~35.8% higher COP and 15~28℃ lower compressor discharge temperature in heat pump mode, which indicates that small diameter tube-and-fin heat exchanger is a promising solution to the automotive heat pump system of electric vehicle.