A comprehensive review on solar water heaters

被引：151
作者：
Jaisankar, S. [1 ]
Ananth, J. [2 ]
Thulasi, S. [3 ]
Jayasuthakar, S. T. [3 ]
Sheeba, K. N. [4 ]
机构：
[1] Star Lion Coll Engn & Technol, Thanjavur 614206, Tamil Nadu, India
[2] Roever Engn Coll, Dept Mech Engn, Perambalur 620009, Tamil Nadu, India
[3] Anna Univ Technol, Dept Mech Engn, Tiruvarur, Tamil Nadu, India
[4] Natl Inst Technol, Dept Chem Engn, Tiruchirappalli 620015, Tamil Nadu, India
来源：
RENEWABLE & SUSTAINABLE ENERGY REVIEWS | 2011年 / 15卷 / 06期
关键词：
Solar water heater; Thermal performance; Heat exchangers; Twisted tapes; Aero profile; Variable headers; FRICTION FACTOR CHARACTERISTICS; TWISTED TAPE INSERTS; THERMAL PERFORMANCE; PRESSURE-DROP; NATURAL-CIRCULATION; LAMINAR-FLOW; PLATE; TUBE; EFFICIENCY; SIMULATION;
D O I：
10.1016/j.rser.2011.03.009
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Solar water heating system proves to be an effective technology for converting solar energy into thermal energy. The efficiency of solar thermal conversion is around 70% when compared to solar electrical direct conversion system which has an efficiency of only 17%. Hence solar water heaters play a vital role in domestic as well as industrial sector due to its ease of operation and simple maintenance. Extensive works on improving the thermal efficiency of solar water heaters resulted in techniques to improve the convective heat transfer. Passive technique has been used to augment convective heat transfer. These techniques when adopted in solar water heaters proved that the overall thermal performance improved significantly. This paper reviews various techniques to enhance the thermal efficiency in solar water heater. In addition to this, a detailed discussion on the limitations of existing research, research gap and suggested possible modifications is made. (C) 2011 Published by Elsevier Ltd.
引用
收藏
页码：3045 / 3050
页数：6
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