一种新型相变蓄热水箱应用于太阳能组合系统的实验研究

A new type of phase change heat storage tank in solar energy combination system

介绍了一种新型笼屉式相变蓄热水箱,通过实验测试对比分析相变蓄热水箱与普通蓄热水箱对太阳能组合系统的太阳能保证率及系统能效比的影响。实验表明:同等水箱容积,使用相变蓄热水箱时太阳能集热系统的小时集热量为普通蓄热水箱的3.7倍,相变蓄热水箱有利于提高太阳能保证率及系统能效比。在太阳能辐照强度相似的情况下,相变蓄热水箱会使太阳能保证率平均提高72%,使系统能效比平均提高26%。同时相变蓄热水箱可减少夜间水箱上部的热损失,使水箱上部水温降减少50%。

In this paper,a new type of cage drawer phase change heat storage tank is introduced.The phase change heat storage tank and ordinary heat storage tank are compared and analyzed through experimental tests on their solar energy guarantee rate and system energy efficiency ratio.The experimental results show that the hourly heat collection with the phase change heat storage tank is 3.7 times of that with the ordinary heat storage tank at the same tank size.The phase change heat storage water tank is beneficial to improve the solar energy guarantee rate and the energy efficiency ratio of the system.When the solar radiation intensity is similar,the phase change heat storage tank will increase the solar energy guarantee rate by 72%on average and increase the energy ef ficiency of the system by 26%compared with the average EER.At the same time,the phase change heat storage tank can reduce the heat loss in the upper part of the water tank at night,and the water temperature drop in the upper part of the water tank can be reduced by 50%.