内置隔板开孔方式对太阳能蓄热水箱热分层的影响

doi:10.12028/j.issn.2095-4239.2019.0055

储能科学与技术 ›› 2019, Vol. 8 ›› Issue (5): 897-903.doi: 10.12028/j.issn.2095-4239.2019.0055

内置隔板开孔方式对太阳能蓄热水箱热分层的影响

王烨^1,2, 宋荣飞¹, 胡悦¹, 鲁红钰¹

1 兰州交通大学环境与市政工程学院, 甘肃兰州 730070;
2 铁道车辆热工教育部重点实验室, 甘肃兰州 730070

收稿日期:2019-04-10 修回日期:2019-05-07 出版日期:2019-09-01 发布日期:2019-05-16
通讯作者: 王烨(1972-),男,教授,博士生导师,从事自然对流及暖通空调研究,E-mail:wangye@mail.lzjtu.cn。
作者简介:王烨(1972-),男,教授,博士生导师,从事自然对流及暖通空调研究,E-mail:wangye@mail.lzjtu.cn。
基金资助:
国家自然科学基金（51476073，51266004），兰州交通大学大学生创新创业训练计划项目（2019052）。

Effect of obstacles with different opening means on thermal stratification in hot water storage tanks

WANG Ye^1,2, SONG Rongfei¹, HU Yue¹, LU Hongyu¹

1 School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, Gansu, China;
2 Key Laboratory of Railway Vehicle Thermal Engineering, Ministry of Education of China, Lanzhou 730070, Gansu, China

Received:2019-04-10 Revised:2019-05-07 Online:2019-09-01 Published:2019-05-16

摘要/Abstract

摘要： 为研究具有内置隔板的太阳能蓄热水箱隔板开孔尺寸及位置对其内部热分层效果的影响，对9种隔板开孔位置的太阳能蓄热水箱内温度场进行了数值分析，结果显示：在相同的流动参数及开孔面积条件下，隔板中心开1个圆孔的水箱热分层效果最好。对于多开孔的水箱，开孔位置对水箱内热分层影响不大，但对蓄热量影响显著。对于隔板中心开1个圆孔的水箱，在不同流动参数条件下，冷、热水出口温差随着冷水入口流速的增大呈先增后减的趋势，当冷水入口流速大于0.9 m/s时，减弱了热分层的稳定性。

关键词: 太阳能蓄热水箱, 隔板, 开孔位置, 热分层

Abstract: The solar hot water storage tank is one of the important equipment of the solar energy application system. At present, the research on the performance of the hot water storage tank mainly focuses on the position and shape of the inlet pipe, the flow parameters, the position and geometry of the obstacle in the water tank. There is no report on the influence of the position and size of the opening of obstacles on the thermal stratification in the solar hot water storage tank. This study aims to evaluate the effect of 9 different positions of the opening of obstacles on thermal stratification and to obtain the optimal structure of the solar hot water storage tank and its optimum operating parameters. The results indicate that the tank with one circular opening in the center of the obstacle provides the optimum thermal stratification under the same flow parameters and opening area. For the tanks with multiple openings, the opening position has little effect on thermal stratification in the tank, but a significant effect on thermal energy storage. For the tank with one circular opening in the center of the obstacle, the temperature difference between the hot and cold water outlets increases first and then decreases with the increase of cold water inlet velocity under different flow parameters. When the cold water inlet velocity is greater than 0.9 m·s^-1, it will weaken the stability of thermal stratification.

Key words: solar hot water storage tank, obstacle, position of the opening, thermal stratification

中图分类号:

TU822

王烨, 宋荣飞, 胡悦, 鲁红钰. 内置隔板开孔方式对太阳能蓄热水箱热分层的影响[J]. 储能科学与技术, 2019, 8(5): 897-903.

WANG Ye, SONG Rongfei, HU Yue, LU Hongyu. Effect of obstacles with different opening means on thermal stratification in hot water storage tanks[J]. Energy Storage Science and Technology, 2019, 8(5): 897-903.

参考文献

[1] KONG L K, YUAN W X, ZHU N. CFD simulations of thermal stratification heat storage water tank with an inside cylinder with openings[J]. Procedia Engineering, 2016, 146:394-399.
[2] CRISTOFARI C, NOTTON G, POGGI P, et al. Influence of the flow rate and the tank stratification degree on the performances of a solar flat-plate collector[J]. International Journal of Thermal Sciences, 2003, 42(5):455-469.
[3] JORDAN U, FURBO S. Thermal stratification in small solar domestic storage tanks caused by draw-offs[J]. Solar Energy, 2005, 78(2):291-300.
[4] 田振华, 周友援, 柳军飞. 海洋温差能发电自升降平台系统建模与仿真[J]. 兵器装备工程学报, 2014, 35(1):31-33. TIAN Z H, ZHOU Y Y, LIU J F. Modeling and simulating of thermal recharging(TREC) and power unit[J]. Journal of Ordnance Equipment Engineering, 2014, 35(1):31-33.
[5] LOUISE J S, SIMON F. Entrance effects in solar storage tanks[J]. Solar Energy, 2003, 75(4):337-348.
[6] GARCIA-MARI E, GASQUE M, GUTIERREZ-COLOMER R P, et al. A new inlet device that enhances thermal stratification during charging in a hot storage tank[J]. Applied Thermal Engineering, 2013, 61(2):663-669.
[7] WANG Z L, ZHANG H, DOU B L, et al. Experimental and numerical research of thermal stratification with a novel inlet in a dynamic hot water storage tank[J]. Renewable Energy, 2017, 111:353-371.
[8] LAVAN Z, THOMPSON J. Experimental study of thermally stratified hot water storage tanks[J]. Solar Energy, 1977, 19(5):519-524.
[9] MONCHO-ESTEVE I, GASQUE M, GONZ'ALEZ-ALTOZANO P, et al. Simple inlet devices and their influence on thermal stratification in a hot water storage tank[J]. Energy and Buildings, 2017, 150:625-638.
[10] HAN S M, WU S T. Computer simulation of a solar energy system with a viscous-entrainment liquid storage tank model[J]. Application of Solar Energy, 1978:165-183.
[11] 王登甲, 刘艳峰. 太阳能热水采暖蓄热水箱温度分层分析[J]. 建筑热能通风空调, 2010, 29(1):16-19. WANG D J, LIU Y F. Analysis of thermal stratification inside a solar storage tank[J]. Building Energy& Environment, 2010, 29(1):16-19.
[12] IEVERS S, LIN W X. Numerical simulation of three-dimensional flow dynamics in a hot water storage tank[J]. Applied Energy, 2009, 86(12):2604-2614.
[13] ALTUNTOP N, ARSLAN M, OZCEYHAN V, et al. Effect of obstacles on thermal stratification in hot water storage tanks[J]. Applied Thermal Engineering, 2005, 25(14):2285-2298.
[14] JINNY R, ANDREW C, ADELE M, et al. Temperature stratification from thermal diodes in solar hot water storage tank[J]. Solar Energy, 2010, 84(3):507-511.
[15] 朱宁, 王占恒, 王大水, 等. 太阳能蓄热水箱的温度分层研究[J]. 太阳能, 2013(18):16-18. ZHU N, WANG Z H, WANG D S, et al. Study of thermal stratification inside a solar storage tank[J]. Solar Energy, 2013(18):16-18.
[16] LOUISE J S, SIMON F. Entrance effects in solar storage tanks[J]. Solar Energy, 2003, 75(4):337-348.
[17] YA C'I W, GHORAB M, ENTCHEV E, et al. Three-dimensional unsteady CFD simulations of a thermal storage tank performance for optimum design[J]. Applied Thermal Engineering, 2013, 60(1):152-163.
[18] ZACH'AR A, FARKBS I, SZLIVKA F. Numerical analyses of the impact of plates for thermal stratification inside a storage tank with upper and lower inlet flows[J]. Solar Energy, 2003, 74(4):287-302.
[19] 胡延铎, 李亚奇, 宋鸿杰, 等. 壳管式与圆柱式梯级相变蓄热装置的数值模拟与比较[J]. 兵器装备工程学报, 2015, 36(3):102-106. HU Y D, LI Y Q, SONG H J, et al. Numerical simulation and comparison of shell-and-cylinder and cylindrical step change thermal storage devices[J]. Journal of Ordnance Equipment Engineering, 2015, 36(3):102-106.
[20] 王烨, 鲍成柯, 付银安, 等. 圆锥形顶太阳能蓄热水箱锥顶结构及运行参数优化[J]. 农业工程学报, 2017, 33(22):255-261. WANG Y, BAO C K, FU Y A, et al. Structure and operating parameter optimization of solar hot water storage tank with conical top[J]. Transactions of the Chinese Society of Agricultural Engineering, 2017, 33(22):255-261.
[21] AVIV A, BLYAKHMAN Y, BEERI O, et al. Experimental and numerical study of mixing in a hot-water storage tank[J]. Journal of Solar Energy Engineering, 2009, 131(1):83-90.
[22] 陶文铨. 数值传热学[M]. 第二版. 西安:西安交通大学出版社, 2001.
[23] 王烨, 徐燃. 青藏线空调列车室内气流组织的沿线变化数值分析[J]. 重庆大学学报, 2014, 37(9):59-67. WANG Y, XU R. Numerical study of airflow distribution in airconditioned train in Qinghai-Tibet railway[J]. Journal of Chongqing University, 2014, 37(9):59-67.
[24] HALLER M Y, CRUICKSHANK C A, STREEICHER W, et al. Methods to determine stratification efficiency of thermal energy storage processes-review and theoretical comparison[J]. Solar Energy, 2009, 83(10):1847-1860.
[25] ERDEMIR D, ALTUNTOP N. Improved thermal stratification with obstacles placed inside the vertical mantled hot water tanks[J]. Applied Thermal Engineering, 2016, 100:20-29.

内置隔板开孔方式对太阳能蓄热水箱热分层的影响

Effect of obstacles with different opening means on thermal stratification in hot water storage tanks

PDF

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 2

编辑推荐

Metrics

本文评价

[1]	王烨, 蔺虎相, 胡悦, 王苗, 林源山. 半球形顶太阳能蓄热水箱内置错层隔板结构及运行参数优化[J]. 储能科学与技术, 2020, 9(3): 942-950.
[2]	孙小祥1, 2，赵剑曦2. 凝胶铅酸蓄电池热失控现象探讨[J]. 储能科学与技术, 2017, 6(1): 122-126.