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윤백,박현연,유국철,김용찬,Yoon, Baek,Park, Hyun-Yeon,Yoo, Guk-Chul,Kim, Yong-Chan 대한설비공학회 1999 설비공학 논문집 Vol.11 No.4
A computer program was developed for simulating performance(capacity, power consumption and etc.) of air-conditioners using compressor, fin-tube heat exchanger and capillary tube. The program consists of five modules, condenser, evaporator, compressor, capillary tube simulation modules and properties modules of refrigerant and moist air, The present program is focused on R22 only, however can be easily extended for other refrigerants such as R407C and R410A just by adding property modules. The compressor simulation module utilizes performance maps supplied by manufacturers-map-based model. The condenser and evaporator simulation modules are modeled using tube-by-tube method. Simulation results(capacity and power consumption) were compared with calorimeter test results of actual air-conditioners of window and split types, where more than 82% of the data lied within ${\pm}5$% of the predicted results.
열전달 촉진 핀-관 열교환기의 공기측 압력강화 및 열전달 특성에 관한 실험
윤백,길용현,박현연,김영생,Youn, Baek,Kil, Yong Hyun,Park, Hyun Yeon,Kim, Young Saeng 대한기계학회 1998 大韓機械學會論文集B Vol.22 No.11
Heat transfer and pressure drop for ${\phi}10.07$ dry surface fin-tube heat exchanger with wave and wave-slit fins were measured for different fin spacings and number of tube rows. Longitudinal and transverse tube spacings of the heat exchangers are 21.65mm and 25mm respectively, and wave depth of wave fin is 1.5mm. The experiments were performed for 4 different fin spacings, 1.3, 1.5, 1.7 and 2.0mm, and the number of tube rows were 1,2 and 3 rows. The present results were compared with the previous results for the wave depth of 2mm. Also hydrophilic coated and bare fins were tested. Correlations for Colburn j-factor and friction factor were developed.
웨이브 및 웨이브-슬릿 열전달촉진 휜-관 열교환기의 공기측 압력강하 및 열전달 특성에 관한 실험
윤백,길용현,박현연,유국철,김영생,Yoon, Baek,Gil, Yong-Hyun,Park, Hyun-Yeon,Yoo, Guk-Chul,Kim, Young-Saeng 대한설비공학회 1998 설비공학 논문집 Vol.10 No.5
Air side heat transfer and pressure drop for fin-tube heat exchanger with wave and wave-slit fins were measured for various fin spacings and number of tube rows. Outer diameter of the tube including fin collar is 10.07mm, and experiments were done with dry surface condition. Longitudinal and transverse tube spacings of the heat exchangers are 21.65mm and 25mm respectively, and wave depth of the wave fin is 2mm. Experiments were conducted for 1, 2 and 3 rows and 3 different fin spacings, 1.3, 1.5 and 1.7mm. An attempt was made to demonstrate advantage of the enhanced fins over the plane fin by introducing the concept of fan power, Effect of the number of tube rows on heat transfer was discussed in connection with general mechanisms of heat transfer enhancement for fin-tube heat exchanger. Also the effect of hydrophilic coating was investigated. Lastly, correlations for Colburn j-factor and friction factor were developed.
성능 및 신뢰성 예측을 위한 멀티에어컨 사이클 시뮬레이션 개발
김태헌(Tae Hun Kim),박현연(Yeon Hyun Park),김중호(Jung Ho Kim),윤백(Baek Youn),박용종(Yong Jong Park),홍순철(Soon Cheol Hong) 대한기계학회 2012 대한기계학회 춘추학술대회 Vol.2012 No.5
멀티형 에어컨의 정격성능 및 신뢰성 예측이 가능한 사이클 시뮬레이션 해석 프로그램을 개발하였다. 프로그램은 다수의 실내기, 1 개의 실외기, 2개의 인버터 압축기와 배관 등의 요소부품으로 구성되어 있다. 시스템의 구성은 요소부품을 자유롭게 설계 창에서 연결가능 하게 되어있다. 실제 10HP 제품실험 자료와 비교결과 표준성능조건에서는 5% 내외, 신뢰성 성능영역에서는 10% 내외로 일치하는 것을 알 수 있다. Multi - type air conditioner with predictable performance and reliability of the rating cycle simulation program has been developed. Program. a number of indoor units and one outdoor, two inverter compressors and Piping components are composed of elements such as: Component parts of the system configuration. drag and drop design freely, that is reachable from the windows. Comparing actual results with the experimental data 10HP product standard condition 5% in terms of performance, reliability condition area, about 10% of the match as we can see that.
휜-관 열교환기에 있어서 각종 휜 형상의 성능 특성에 관한 실험적 연구
윤백,김영생,박환영,박현연,Yoon, Baek,Kim, Young-Saeng,Park, Hwan-Young,Park, Hyun-Yeon 대한설비공학회 1999 설비공학 논문집 Vol.11 No.4
Air side heat transfer and pressure drop for ø9.52 fin-tube heat exchanger with various types of slit and louver fins were measured, and compared with wave-slit fin. Longitudinal and transverse tube spacings of the heat exchangers are 21.65mm and 25mm respectively. Actual heat exchanger was tested using water, and the tests were performed for 2 row heat exchangers with 3 different fin spacings, 1.3, 1.5 and 1.7mm. The overall performance of the enhanced fins was evaluated by comparing heat transfer coefficient with respect to fan power.