Experimental study of PCM melting in triplex tube thermal energy storage for liquid desiccant air conditioning system

被引：101

作者：

Al-Abidi, Abduljalil A. ^{[1
,2
]}

Mat, Sohif ^{[1
]}

Sopian, K. ^{[1
]}

Sulaiman, M. Y. ^{[1
]}

Mohammad, Abdulrahman Th. ^{[1
]}

机构：

[1] Univ Kebangsaan Malaysia, Solar Energy Res Inst, Bangi 43600, Selangor, Malaysia

[2] Sanaa Community Coll, Dept HVAC Engn, Sanaa, Yemen

来源：

ENERGY AND BUILDINGS | 2013年 / 60卷

关键词：

Melting; Triplex tube heat exchanger; Phase change material; Thermal energy storage; SOLIDIFICATION; PERFORMANCE; BEHAVIOR;

D O I：

10.1016/j.enbuild.2013.01.031

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Thermal energy storage such as latent heat thermal energy storage can reduce the energy supply-demand discrepancy and improve the efficiency of solar energy systems because of its high thermal energy density (per unit mass and per unit volume). The present work investigates the application of a triplex tube heat exchanger with a phase-change material (PCM) (paraffin wax RT 82) in the middle tube to power a liquid-desiccant air-conditioning system. The experiment examined the effects of mass flow rates and heating methods selected on PCM melting. Three techniques were investigated: heating the inside tube, heating the outside tube, and heating both sides tube. The PCM temperature gradients in the radial, angular, and axial directions were analyzed. Results indicated that the third case (i.e., heating both sides) achieved complete PCM melting within a short time and used a lower inlet heat transfer fluid temperature compared with the other cases. No significant temperature variation in the axial direction was indicated. The heat transfer phenomena in the radial and angular directions can be predicted in melted PCM. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：270 / 279

页数：10

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