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자동차용(自動車用) 폐(廢) 라디에이터를 이용한 히트 파이프형 환기배열(換氣排熱) 회수기(回收器)에 관한 연구(硏究)
임용빈,최상조,김정훈,김종수,Im, Yong-Bin,Choi, Sang-Joe,Kim, Jeong-Hoon,Kim, Jong-Soo 한국자원리싸이클링학회 2006 資源 리싸이클링 Vol.15 No.3
최근 실내 공기질에 대한 관심이 집중되고 있으며, 본 연구에서는 자동차용 폐 라디에이터를 재활용하여 진동형 히트 파이프 (pulsating heat pipe : PHP)타입의 환기열 회수기로 제작하고, 그 성능에 대해 평가하였다. 작동유체로는 R-134a를 사용하였으며, 충전율은 내부체적비($\varphi$) 30% 및 40%로 PHP를 제작하였다. PHP의 높은 열전달 성능으로 인해 컴팩트 열교환기로 제작가능하였으며, 기존의 환기열 회수기와 대등한 성능을 보여주었다. 또한 부하변동에 따라 유닛의 개수를 증감할 수 있는 Cassette type일 뿐 아니라, 자동차용 폐 열교환기의 재활용으로 높은 경제성과 효율성이 기대된다. For keeping the indoor air quality, we develop the pulsating heat pipe(PHP) type heat recovery ventilator using an used radiator for vehicles. We compare the PHP type with existing model. There are some merits that are able to change the unit number according to heat load and show us the similar performance to existing models.
장력 감김으로 부착된 가로방향 휜-미니채널의 공기측 열전달 특성
김종수,임용빈,Kim Jong-Soo,Im Yong-Bin 한국마린엔지니어링학회 2005 한국마린엔지니어링학회지 Vol.29 No.6
Pipes, tubes. and tubular sections with external transverse high fins have been used extensively for heating cooling, and degumidifying air and other gases. This work was performed to investigate an air side heat transfer charactieristics of minichannel with tension wound transverse fin. This estimate was confirmed conversion heat capacity the air side surface area enlargement and heat transfer charactieristics performed available inlet tube side hot water mass flux or outlet tube side air frontal air velocity. The most suitable tension wound transverse finned minichannel was measured extremely low in air side pressure drop and fin effectiveness $3.3\~4.4$. The pressure drop $0.9\~2.8Pa$ was ranged frontal air velocity $0.5\~1.2m/s$. It is also appeared that heat transfer in air side could be better conversion heat area which has been increased $330\%$ of heat capacity compared with the bare tube.
톱니형휜이 부착된 2중 열교환관을 이용한 엔진 배열회수기에 관한 실험적 연구
양태진,김종수,임용빈,Yang Tae-Jin,Kim Jong-Soo,Im Yong-Bin 한국마린엔지니어링학회 2005 한국마린엔지니어링학회지 Vol.29 No.6
In this study, high performance waste heat recovery heat exchanger was developed using the bayonet tube with spiral serrated fins. Especially, heat exchanger of the bayonet tube type was operated well because of double water passes mechanism and characteristics. A cooling water Passes down inner tubes to thimble-form tubes, then flows back up as it boils. The heat exchanger of bayonet tube type was composed of steel tube with 7channels$(I.D_1\;14mm.\;I.D_2\;31.6mm)$ and spiral serrated fins. The performance tests were conducted under the following conditions A cooling water flow rate was 273kg/h and engine l·pm was varied from 750rpm to 3500 rpm. From the experimental result. waste heat recovery was 9.21kW when engine rpm was 3500. and pressure drop was $15\~260mmHg/m^3$ The effectiveness of heat exchanger was about /$0.7\~0.9$. The performance of heat exchanger was evaluated by using the $\varepsilon-NTU$ method. In the study the NTU of the heat exchanger was $1.57\~2.33$.