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정영권(Young-Kwon Jung),김현주(Hyeon-Ju Kim),이호생(Ho-Saeng Lee),윤정인(Jung-In Yoon) 한국해양환경·에너지학회 2012 한국해양환경·에너지학회 학술대회논문집 Vol.2012 No.11
해수냉난방(Sea Water Air Conditioning) 시스템에서는 물을 해수와 판형 열교환기에서 열교환하여 고/저온의 물을 건물에 보내어 냉난방하는 방식을 채택하고 있다. 기존 판형 열교환기에는 비싼 티타늄 소재를 이용하지만, 이는 설비 구축 단계 및 유지 보수 단계까지 비용이 증가되는 약점을 지니고 있다. 따라서 기존의 티타늄이나 스테인리스보다 높은 열적 성능을 가진 소재를 판형열교환기에 적용하면 비용뿐 아니라 에너지를 효율적으로 이용할 수 있다. 본 연구에서는 판형 열교환기의 기존 소재(티타늄, 스테인리스 등)를 대체할 수 있는 코팅(DLC, 테프론 코팅)된 판형 열교환기를 제작하여, 유량에 따른 열전달 성능을 무차원수인 j factor로 분석하였다. Plate heat exchangers are currently used not in the chemical industry, but also in marine plants such as OTEC (Ocean Thermal Energy Conversion) and SWAC (Sea Water Air Conditioning). The plate heat exchangers, which are to exchange heat between hot(water) and cold side(seawater), have been widely adopted in many industrial application. Plate Heat Exchanger uses the expensive titanium. however, it has a weakness that equipment costs and maintenance costs increased. It was carried out in order to investigate the heat transfer performance for PHE. Heat transfer was investigated with the characteristic parameters, j factor.
정영권(Young-Kwon Jung),이호생(Ho-Saeng Lee),김현주(Hyeon-Ju Kim),윤정인(Jung-In Yoon) 한국해양환경·에너지학회 2012 한국해양환경공학회 학술대회논문집 Vol.2012 No.5
Plate heat exchanger is being applied in the field of marine plants and chemical industry, such as OTEC and SWAC equipment. The study aims to interpret the thermal and pressure drop characteristics of plate heat exchangers to determine the geometric design parameters such as the channel space. In this study, heat transfer performance was numerically studies with respect to the flow pattern and channel space. The results from numerical analysis indicated that the j factor was linearly decreased with flow reate over every case. As the flow increases within channel spaces, the j factor was found to be decreased linearly. And the f factor is linearly decreasing with the increase of mass flow rate. The f factor was constant with flow rate over every case. As the flow increased within channel spaces, the f factor was found to be constant.