Experimental study of fixed and fluidized beds of PCM with an internal heat exchanger

被引：10

作者：

Izquierdo-Barrientos, M. A. ^{[1
]}

Fernandez-Torrijos, M. ^{[1
]}

Almendros-Ibanez, J. A. ^{[2
,3
]}

Sobrino, C. ^{[1
]}

机构：

[1] Univ Carlos III Madrid, Dept Ingn Term & Fluidos, Avda Univ 30, Madrid 28911, Spain

[2] Univ Castilla La Mancha, Dept Mecan Aplicada & Ingn Proyectos, Escuela Ingenieros Ind, Campus Univ S-N, Albacete 02071, Spain

[3] Renewable Energy Res Inst, Sect Solar & Energy Efficiency, C Invest S-N, Albacete 02071, Spain

来源：

APPLIED THERMAL ENGINEERING | 2016年 / 106卷

关键词：

Fixed bed; Fluidized bed; Phase change material; Energy storage; Coil; Heat exchanger; THERMAL-ENERGY STORAGE; TRANSFER COEFFICIENT; AIR; PERFORMANCE;

D O I：

10.1016/j.applthermaleng.2016.06.049

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

This work presents the results of experiments performed in a thermal energy storage tank filled with particles, which was heated using hot air and then discharged with a cold water stream circulating inside a heat exchanger immersed in the bed. Both fixed- and fluidized-bed configurations were studied. The materials used were sand, which is a material commonly employed in sensible heat storage, and a granular phase change material (PCM), in which the phase change occurs over the temperature range of 4050 degrees C. Three different heat exchangers with different helical coil geometries were tested by measuring the temperatures in the bed and at the water inlet and outlet. Higher heat transfer coefficients between the bed and the water flow and higher heat exchanger effectiveness were observed for the heat exchanger with the greatest distance between coils, as it allows better contact between the bed particles and the heat exchanger surface when the particles are fluidized. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：1042 / 1051

页数：10

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