不同结构储热水箱分层特性的实验研究

doi:10.16085/j.issn.1000-6613.2017-0690

化工进展 ›› 2018, Vol. 37 ›› Issue (01): 44-52.DOI: 10.16085/j.issn.1000-6613.2017-0690

不同结构储热水箱分层特性的实验研究

黄震, 王子龙, 张华, 黄华杰

上海理工大学制冷及低温工程研究所, 上海 200093

收稿日期:2017-04-19 修回日期:2017-06-19 出版日期:2018-01-05 发布日期:2018-01-05
通讯作者: 王子龙,博士,讲师,研究方向为太阳能高聚光电池的冷却及相关技术。
作者简介:黄震(1992-),男,硕士研究生,从事太阳能及热泵热水器储热水箱相关技术研究。
基金资助:
国家自然科学基金（51606126，51476022）及上海市自然科学基金（15ZR1428800）项目。

Experimental analysis on stratification characteristics of different structure tanks

HUANG Zhen, WANG Zilong, ZHANG Hua, HUANG Huajie

Institute of Refrigeration and Cryogenics, University of Shanghai for Science and Technology, Shanghai 200093, China

Received:2017-04-19 Revised:2017-06-19 Online:2018-01-05 Published:2018-01-05

摘要/Abstract

摘要： 在太阳能集热系统中，储热水箱内的温度分层效果受不同水箱结构的影响巨大。为研究这一特性，搭建了一套储热水箱分层特性测试实验台，对直接进口式、三层孔板式和盒状结构水箱进行了测试实验。水箱内初始水温为70℃，在相同的进水温度和不同的流量条件下，根据实验数据绘制了不同结构水箱内的各层温度变化曲线。结果显示，进水流量越大，水箱内混合效应越大，各层温度趋于一致的时间越短。在热力学定律的基础上，计算并分析了3种结构水箱的取出效率、（火用）和Str数等分层特性指标。结果表明，3种结构中，盒状结构水箱内的温度分层效果最好，对热量的利用率最高，盒装结构有效地抑制了冷热水混合效应，其次为三层孔板式水箱，而直接进口式水箱的温度分层效果最差。

关键词: 储热水箱, 分层效果, 取出效率, (火用), 分层数

Abstract: In solar energy heat-collecting system, temperature stratification effect of the storage tank is greatly influenced by different tank structures. A test rig of storage tank was established in order to study the stratification characteristics. Experiments of three different structure tanks (direct import, three layers and stratifier)were carried out. The initial water temperature in the tank is 70℃. Under the same inlet water temperature and different quantities of flow rate, the temperature variation curves of each layer in different structure tanks were drawn according to the experimental data. Results showed that with the increase of influent flow rate, the mixing effect in the storage tank is strengthened and the temperature of each layer tends to be consistent with less time. Based on the law of thermodynamics, the indexes of stratification effect such as extraction efficiency, dimensionless exergy and stratification number of these tanks were analyzed. Results also showed that among these different structure tanks, the stratifier has a best stratification effect and effectively inhibits the mixing effect. Besides, three layers tank has a better stratification effect than the direct import ones.

Key words: water storage tank, stratification effect, extraction efficiency, dimensionless exergy, stratification number

中图分类号:

TK114

黄震, 王子龙, 张华, 黄华杰. 不同结构储热水箱分层特性的实验研究[J]. 化工进展, 2018, 37(01): 44-52.

HUANG Zhen, WANG Zilong, ZHANG Hua, HUANG Huajie. Experimental analysis on stratification characteristics of different structure tanks[J]. Chemical Industry and Engineering Progress, 2018, 37(01): 44-52.

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不同结构储热水箱分层特性的实验研究

Experimental analysis on stratification characteristics of different structure tanks

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