Comparison of the Efficiency of Cross-Flow Plate Heat Exchangers Made of Varied Materials

Krzysztof Grysa, Artur Maciąg () and Artur Ściana
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Krzysztof Grysa: Faculty of Management and Computer Modelling, Kielce University of Technology, 25-314 Kielce, Poland
Artur Maciąg: Faculty of Management and Computer Modelling, Kielce University of Technology, 25-314 Kielce, Poland
Artur Ściana: Faculty of Management and Computer Modelling, Kielce University of Technology, 25-314 Kielce, Poland

Energies, 2022, vol. 15, issue 22, 1-17

Abstract: This paper discusses a mathematical model for airflow through a cross-flow plate heat exchanger. The exhaust air is used to heat the supply air. Three kinds of plates are considered: made of aluminium, copper, and steel. The purpose of this research was to verify which material used to build the plate heat exchangers uses the exhaust air heat more efficiently. The method of the Trefftz function was used to determine approximate solutions to the analysed problem. The results obtained for 1.2 mm-thick plates and for external winter, summer, and spring–autumn temperatures are discussed. The results indicate that if the efficiency and price of the metals are considered, then steel is the best material for the plate heat exchanger. Thanks to the use of thin steel plates and the reduction in air exchange time to a few minutes, a cheap and efficient cross-flow heat exchanger can be obtained.

Keywords: heat transfer; cross-flow heat exchanger; recuperator; Trefftz method (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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