太阳能相变储能水箱释能性能的数值模拟

doi:10.3969/j.issn.2095-4239.2013.04.006

储能科学与技术 ›› 2013, Vol. 2 ›› Issue (4): 377-382.doi: 10.3969/j.issn.2095-4239.2013.04.006

太阳能相变储能水箱释能性能的数值模拟

张永信¹, 李舒宏¹, 操恺², 李献亮¹, 顾维维¹

1 东南大学能源与环境学院,江苏南京 210096;
2 江苏省产品质量监督检验研究院,江苏南京 210007

收稿日期:2013-03-14 修回日期:2013-05-31 出版日期:2013-08-19 发布日期:2013-08-19
通讯作者: 李舒宏,博士,研究员,从事制冷与太阳能利用研究,E-mail:equart@seu.edu.cn.
作者简介:张永信(1987--),男,硕士研究生,E-mail:100yongyuan@163.com
基金资助:
"十二五"国家科技支撑计划(2011BAJ03B05)及江苏省科技支撑项目(BE2010747)

Numerical analysis of the discharging performance of a solar energy storage tank containing PCM modules

ZHANG Yongxin¹, LI Shuhong¹, CAO Kai², LI Xianliang¹, GU Weiwei¹

1 School of Energy and Environment,Southeast University,Nanjing 210096,Jiangsu,China;
2 Institute of Product Quality Supervision and Inspection of Jiangsu,Nanjing 210007,Jiangsu,China

Received:2013-03-14 Revised:2013-05-31 Online:2013-08-19 Published:2013-08-19

摘要/Abstract

摘要： 采用数值模拟软件FLUENT对含有相变储能模块的储热水箱(下文简称为相变储能水箱)和不含相变储能模块的普通水箱(直接进水)的释能工况进行数值模拟,并将模拟结果进行了对比.数值模拟结果表明水箱加入相变储能模块后,一方面相变储能模块的堆积起到了散流作用,减缓了进口水流造成的扰动;另一方面冷水进入水箱中通过相变储能模块缝隙时,相变储能模块对冷水有一定的加热作用.加入相变储能模块后,改善了释能过程的水箱内热分层效果,提高了储热水箱的释热总量.在流量为5 L/min时,相变储能水箱的释能效率比普通水箱的释能效率高7%,但是随着流量的增大,相变储能水箱的释能效率逐渐降低.

关键词: 相变储能, PCM, 数值模拟, 释能效率

Abstract: Numerical simulations were carried out on the discharging behaviour of a thermal energy storage water tank containing PCM modules and a tank containing only water. The modeling was done by using a CFD software package FLUENT. The results show that the cold inlet water can be heated by the PCM module during the discharging process and the PCM modules also act as a diffuser to reduce the disturbance caused by the inlet cold water. The PCM modules improve the thermal stratification of water during the discharging process. At a flow rate of 5 L/min, the discharging efficiency of the tank with PCM modules is 7% higher than that of the normal tank and the discharging efficiency of the water tank with PCM modules decreases with increasing water flow rate.

Key words: latent energy storage, PCM, numerical simulation, discharging efficiency

中图分类号:

TK02

张永信, 李舒宏, 操恺, 李献亮, 顾维维. 太阳能相变储能水箱释能性能的数值模拟[J]. 储能科学与技术, 2013, 2(4): 377-382.

ZHANG Yongxin, LI Shuhong, CAO Kai, LI Xianliang, GU Weiwei. Numerical analysis of the discharging performance of a solar energy storage tank containing PCM modules[J]. Energy Storage Science and Technology, 2013, 2(4): 377-382.

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太阳能相变储能水箱释能性能的数值模拟

Numerical analysis of the discharging performance of a solar energy storage tank containing PCM modules

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