Design of welded chevron plate heat exchanger: application of recuperator in LiBr-water absorption systems
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DOI 10.1007/s12206-020-1033-3
Journal of Mechanical Science and Technology 34 (11) 2020 Original Article DOI 10.1007/s12206-020-1033-3 Keywords: · Absorption refrigeration system · Chevron · Heat recovery · Plate heat exchanger · Recuperator · Waste heat
Correspondence to: Chan Woo Park [email protected]
Citation: Kim, B. R., Kim, M. S., An, S.-K., Park, C. W. (2020). Design of welded chevron plate heat exchanger: application of recuperator in LiBr-water absorption systems. Journal of Mechanical Science and Technology 34 (11) (2020) 4763~4771. http://doi.org/10.1007/s12206-020-1033-3
Received May 21st, 2019 Revised
June 11th, 2020
Accepted August 6th, 2020
Design of welded chevron plate heat exchanger: application of recuperator in LiBr-water absorption systems Byung Ryeon Kim1, Min Soo Kim1, Sung-Kuk An2 and Chan Woo Park1,3 1
School of Mechanical Design Engineering, Jeonbuk National University, 567, Baekje-daero, Deokjin-Gu, 2 Jeonju-city, Jeonbuk 54896, Korea, Samil Industry Corp., 330-31, Palbok-dong 1-ga, Deokjin-gu, Jeonju3 city, Jeonbuk 54843, Korea, Department of Energy Storage/Conversion Engineering of Graduate School, Jeonbuk National University, Jeonju, Jeollabuk-do 54896, Korea
Abstract
As applications of the heat pump and refrigeration, thermally-driven absorption systems which use the lithium bromide and water pair have been widely utilized in various industrial fields since the waste heat can be used directly to obtain the desired effects. A recuperator preheats a working fluid, which enters a generator in the absorption system, decreasing the required heating load. The present study addresses the optimum design of the weldedplate-type heat exchanger as an application of the recuperator. Computational fluid dynamics (CFD) predicted the flow characteristics through chevron plate heat exchangers of different structural dimensions; based on the predictions, optimized dimensions in terms of the heat transfer rate and friction factor was selected. Then, four headers using the selected dimensions were investigated by the CFD technique for selecting the desired plate heat exchanger. Experimental investigations were conducted on the selected configuration as well, and the results were compared with those of the CFD simulation.
† Recommended by Editor Yong Tae Kang
1. Introduction
© The Korean Society of Mechanical Engineers and Springer-Verlag GmbH Germany, part of Springer Nature 2020
Waste heat is a renewable energy alleviating our requirement of fossil fuels; in addition, it enables more efficient power generation and thus reduces power-production costs. The waste heat can also be efficiently used to operate the absorption systems for both heat pump and refrigeration applications [1]. In addition, eco-friendly working fluids, e.g., lithium bromide (LiBr)water pair, spurs the use of the absorption systems in various industrial fields for preventing ozone depletion and greenhouse effect. A recuperator has been frequently used in heat-driven absorption systems to recycle the heat source so tha
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