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판형열교환기 내부에서 R32 응축열전달 현상에 관한 실험적 연구
강진호(JIn ho Kang),김덕규(deokgyu Kim),문지훈(Ji hoon Moon),박창용(Chang Yong Park) 대한설비공학회 2019 대한설비공학회 학술발표대회논문집 Vol.2019 No.11
This experimental study was performed to measure the heat transfer coefficient and pressure drop in a brazed plate heat exchanger. R32 were used for the experiment. The tested heat exchanger was operated as an condenser. The two phase condition at the condenser inlet was controlled by a pre-heater powered by electricity. A test facility was built up to measure the two phase flow heat transfer coefficient at the conditions that were mass flux rate of 35, 40 ㎏/㎡s, saturation temperature of 35℃, and heat flux of from 3 ㎾/m². The inlet vapor quality was varied from 0.1 to 0.7 at the saturated inlet condition. The refrigerant outlet quality was calculated by difference of water temperature. This experiment showed that heat transfer coefficient increased usually with vapor quality.