Effects of the Wall Properties on the Cooling Efficiency in a Thermosyphon Containing PCM Suspensions

Ching-Jenq Ho, Shih-Ming Lin and Chi-Ming Lai
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Ching-Jenq Ho: Department of Mechanical Engineering, National Cheng-Kung University, University Road, Tainan City 701, Taiwan
Shih-Ming Lin: Department of Mechanical Engineering, National Cheng-Kung University, University Road, Tainan City 701, Taiwan
Chi-Ming Lai: Department of Civil Engineering, National Cheng-Kung University, University Road, Tainan City 701, Taiwan

Energies, 2021, vol. 14, issue 3, 1-16

Abstract: This study explores the effects of pipe wall properties (thermal conductivity k and wall thickness t w ) on the heat transfer performance of a rectangular thermosyphon with a phase change material (PCM) suspension and a geometric configuration (aspect ratio = 1; dimensionless heating section length = 0.8; dimensionless relative elevation between the cooling and the heating sections = 2) that ensures the optimum heat transfer efficiency in the cooling section. The following parameter ranges are studied: the dimensionless loop wall thickness (0 to 0.5), wall-to-fluid thermal conductivity ratio (0.1 to 100), modified Rayleigh number (10 10 to 10 11 ), and volumetric fraction of PCM particles (0 to 10%). The results show that appropriate selection of k and t w can lead to improved heat transfer effectiveness in the cooling section of the PCM suspension-containing rectangular thermosyphon.

Keywords: latent heat; phase change material; thermosyphon; heat transfer; wall material (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: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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