Thermal performance of an integrated collector storage solar water heater (ICSSWH) with phase change materials (PCM)

被引:135
作者
Chaabane, Monia [1 ]
Mhiri, Hatem [1 ]
Bournot, Philippe [2 ]
机构
[1] Ecole Natl Ingenieurs Monastir, Unite Therm & Thermodynam Proc Ind, Monastir 5000, Tunisia
[2] UMR CNRS 6595, IUSTI, F-13013 Marseille, France
关键词
Computational Fluid Dynamics (CFD) simulation; Integrated collector storage solar water heater (ICSSWH); Phase change material (PCM); Thermal performance; Night losses; HEATING SYSTEMS; CPC REFLECTORS;
D O I
10.1016/j.enconman.2013.07.089
中图分类号
O414.1 [热力学];
学科分类号
摘要
In this paper, we propose a numerical study of an integrated collector storage solar water heater (ICS-SWH). Two numerical models in three-dimensional modeling are developed. The first one which describes a sensible heat storage unit (SHSU), allowing validating the numerical model. Based on the good agreement between numerical results and experimental data from literature, and as this type of solar water heater presents the disadvantage of its high night losses, we propose to integrate a phase change material (PCM) directly in the collector and to study its effect on the ICSSWH thermal performance. Indeed, a second 3D CFD model is developed and series of numerical simulations are conducted for two kind (myristic acid and RT42-graphite) and three radiuses (R = 0.2 m, R = 0.25m and R = 0.3 m) of this PCM layer. Numerical results show that during the day-time, the latent heat storage unit (LHSU) performs better than the sensible one when myristic acid is used as PCM. Regarding the night operating of this solar system, it is found that the LHSU is more effective for both PCMs as it allows lower thermal losses and better heat preservation. (C) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码:897 / 903
页数:7
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