A basic study on development of high-pressure compact steam unit applied hybrid heat exchanger

Title & Authors
A basic study on development of high-pressure compact steam unit applied hybrid heat exchanger
Kim, Jeung-Hoon; Lim, Gye-Hun; Kim, Seung-Hyun; Jin, Chul-Kyu; Park, Jae-Hong; Cho, Sung-Youl; Hong, In-Ki; Lee, Sang-Rae;

Abstract
In various industrial plants such as power generation plants, petrochemical plants, and unit factories, there is an increasing demand for a system that generates hot water using waste or surplus steam. Compact steam unit (CSU), which produces hot water by using steam, is a good solution considering energy reuse. In this study, as a basic study to develop a high-pressure CSU, heat transfer characteristics of a hybrid heat exchanger were investigated through experiments, in order to use the hybrid heat exchanger instead of a conventional plate heat exchanger as the core component of CSU. The experimental results are the followings. Heat balance between the hot side and cold side was satisfied within $\small{{\pm}5%}$. Overall heat transfer coefficient increased linearly as the Reynolds number increased and exceeded $\small{5,524W/m^2K}$ when the flow velocity was above 0.5 m/s. In addition, pressure drop also increased as the Reynolds number increased, and pressure drop per unit length was below 50 kPa/m.
Keywords
CSU(Compact steam unit);Hybrid heat exchanger;Overall heat transfer coefficient;Pressure drop;
Language
Korean
Cited by
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