太阳能供暖静置期埋地储热水体散热特性分析

许莉; 李勇; 刘艳峰; 梁宇翔; 王登甲

doi:10.19912/j.0254-0096.tynxb.2024-0363

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太阳能学报 ›› 2025, Vol. 46 ›› Issue (7) : 733-740. DOI: 10.19912/j.0254-0096.tynxb.2024-0363

第二十七届中国科协年会学术论文

太阳能供暖静置期埋地储热水体散热特性分析

许莉¹, 李勇^1,2, 刘艳峰^1,2, 梁宇翔¹, 王登甲^1,2

作者信息 +

ANALYSIS OF HEAT DISSIPATION CHARACTERISTICS OF BURIED THERMAL STORAGE WATER PIT DURING STANDBY PERIOD FOR SOLAR HEATING SYSTEMS

Xu Li¹, Li Yong^1,2, Liu Yanfeng^1,2, Liang Yuxiang¹, Wang Dengjia^1,2

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文章历史 +

摘要

建立倒金字塔形埋地储热水体的三维瞬态模型,并通过西藏浪卡子县埋地储热水体的实测结果进行验证,研究几何形状对太阳能供暖静置期埋地储热水体热性能的影响。结果表明,水体高10 m时,随着坡角的增加,水体顶部和侧壁的自然对流换热系数减小,底部的自然对流换系数增加;当水体高度小于等于10 m时,储热水体的总热损失随着坡角的增加而降低。当坡角为30°、60°、90°、高度分别为12、10、10 m时水体储热效率最高,其中水体高度为10 m、坡角为60°时,储热效果最优。

Abstract

A three-dimensional transient model of pit thermal energy storage （PTES） with an inverted pyramid shape is established and verified using measured results from a PTES system in Langkazi County, Tibet. The influence of geometric shape on thermal performance of PTES during the standby period is studied. The results indicate that with a PTES height of 10 m, the natural convection heat transfer intensity at the top and side of PTES decreases with an increase in the slope angle, while the natural convection heat transfer intensity at the bottom increases. For the height of PTES less than or equal to 10 m, the total heat loss of PTES decreases with the increase in the slope angle. The optimal heat storage efficiencies of PTES is achieved when the slope angles are 30°, 60°, and 90°, and the heights are 12 m, 10 m, and 10 m, respectively. After a standby period for 60 hours, with a PTES height of 10 m and a slope angle of 60°, the highest heat storage efficiency is achieved.

导出引用

许莉, 李勇, 刘艳峰, 梁宇翔, 王登甲. 太阳能供暖静置期埋地储热水体散热特性分析[J]. 太阳能学报. 2025, 46(7): 733-740 https://doi.org/10.19912/j.0254-0096.tynxb.2024-0363

Xu Li, Li Yong, Liu Yanfeng, Liang Yuxiang, Wang Dengjia. ANALYSIS OF HEAT DISSIPATION CHARACTERISTICS OF BURIED THERMAL STORAGE WATER PIT DURING STANDBY PERIOD FOR SOLAR HEATING SYSTEMS[J]. Acta Energiae Solaris Sinica. 2025, 46(7): 733-740 https://doi.org/10.19912/j.0254-0096.tynxb.2024-0363

中图分类号： TU832

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