Long-term thermal performance of a two-phase thermosyphon solar water heater

被引：62

作者：

Chen, Bo-Ren ^{[1
]}

Chang, Yu-Wei ^{[1
]}

Lee, Wen-Shing ^{[2
]}

Chen, Sih-Li ^{[1
]}

机构：

[1] Natl Taiwan Univ, Dept Mech Engn, Taipei 106, Taiwan

[2] Natl Taipei Univ Technol, Dept Air Conditioning & Refrigerat Engn, Taipei 106, Taiwan

来源：

SOLAR ENERGY | 2009年 / 83卷 / 07期

关键词：

Long-term thermal performance; Two-phase thermosyphon; Solar water heater; STORAGE;

D O I：

10.1016/j.solener.2009.01.007

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

This article investigates experimentally the long-term thermal performance of a two-phase thermosyphon solar water heater and compares the results with the conventional systems. Experimental investigations are conducted to obtain the system thermal efficiencies from the hourly, daily and long-term performance tests. Different heat transfer mechanisms, including natural convection, geyser boiling, nucleate boiling and film-wise condensation, are observed in the two-phase thermosyphon solar water heater while solar radiation varies. The thermal performance of the proposed system is compared with that of four conventional solar water heaters. Results show that the proposed system achieves system characteristic efficiency 18% higher than that of the conventional systems by reducing heat loss for the two-phase thermosyphon solar water heater. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：1048 / 1055

页数：8

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