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하이브리드 열교환기 적용 컴팩트 고압 스팀 유닛 개발에 관한 기초 연구
김정훈(Jeung-Hoon Kim),임계훈(Gye-Hun Lim),김승현(Seung-Hyun Kim),진철규(Chul-Kyu Jin),박재홍(Jae-Hong Park),조성열(Sung-youl Cho),홍인기(In-Ki Hong),이상래(Sang-Rae Lee) 대한설비공학회 2015 대한설비공학회 학술발표대회논문집 Vol.2015 No.11
In the various plants such as power plant and petro-chemical plant and industrial facilities such as unit factory, the demand of heating and hot-water supply system using steam are more and more increasing. Compact steam unit is one of good solution in terms of energy reuse as system for making hot water and hot-water supply water using closed-loop system. It was intended to understand the characteristics of heat transfer and pressure drop using hybrid heat exchanger to apply high pressure compact steam unit(CSU) for industrial plants and unit factory by experimental methods. The experimental results are the followings. Heat balance between hot side and cold side was within ± 5 %. j factor was increased linearly as the Reynolds number was increased. And, Overall heat transfer coefficient exceeded 4,750 kcal/㎡h℃ when the flow velocity was 0.5 m/s above on both first test(narrow gap side) and second test(wide gap side). And, f factor was decreased as the Reynolds number was increased. Finally, pressure drop per unit length was below 0.5 bar/m on both first test(narrow gap side) and second test(wide gap side).