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Appl. Sci. 2017, 7(5), 448; doi:10.3390/app7050448

Experimental Study on Heat Transfer Performance of Vacuum Tube Heat Collector with Thermal Storage

1
School of Energy and Environment, Southeast University, Nanjing 210096, China
2
Jiangsu Provincial Key Laboratory of Solar Energy Technology, Nanjing 210096, China
*
Author to whom correspondence should be addressed.
Academic Editor: Xianchang Li
Received: 11 March 2017 / Revised: 25 April 2017 / Accepted: 25 April 2017 / Published: 28 April 2017
(This article belongs to the Special Issue Advances in Thermal System Analysis and Optimization)
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Abstract

This experimental study is intended to explore the heat performance of a novel vacuum tube heat collector with thermal storage. In order to enhance the heat transfer performance, we add radial metal fins to the U-tube which is used as the heat transfer channel of water. Meanwhile, in order to increase the thermal capacity of the heat collector, the heat collector model is designed to be larger than the general collector and is filled with the phase change materials (PCMs). In the U-tube, paraffin is chosen as the PCM. Then, during the experiment, to study the energy absorption and desorption characteristics of the heat collector, we chose to test during the day and night in the summer and the transition season. The experimental results show that, at night, the outlet water temperature of the vacuum tube heat collector has been enhanced by using PCM. The outlet water temperature decreases with the increase of flow rate. View Full-Text
Keywords: PCM; solar water heat collector; paraffin; thermal energy storage; U-tube PCM; solar water heat collector; paraffin; thermal energy storage; U-tube
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Huang, X.; Chen, Z.; Shi, J. Experimental Study on Heat Transfer Performance of Vacuum Tube Heat Collector with Thermal Storage. Appl. Sci. 2017, 7, 448.

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