盐梯度太阳池热性能数值模拟及其供热应用研究  

NUMERICAL SIMULATION OF THERMAL PERFORMANCE OF SALINITY GRADIENT SOLAR POND AND ITS HEATING APPLICATION

作　　者：郭永庆 杨艳 司杨 陈晓弢 麻林瑞 Guo Yongqing;Yang Yan;Si Yang;Chen Xiaotao;Ma Linrui(Qinghai Key Laboratory of Efficient Utilization of Clean Energy,New Energy Photovoltaic Industry Research Center,Qinghai University,Xining 810016,China)

机构地区：[1]青海大学新能源光伏产业研究中心,青海省清洁能源高效利用重点实验室,西宁810016

出　　处：《太阳能学报》2024年第9期414-420,共7页Acta Energiae Solaris Sinica

基　　金：青海省科技计划项目(2018-ZJ-774);青海大学青年科研基金(2020-QGY-14)。

摘　　要：首先,在构建太阳池一维瞬态模型的基础上,利用有限差分法对太阳池在不同结构尺寸和提热速率下的热性能进行数值仿真分析;进一步,结合数值仿真结果设计太阳池集成供热系统,探讨其在普通居民建筑供热方面的供热性能。结果表明,太阳池内温度将会因其结构尺寸的不同而产生差异,且当采用最佳结构尺寸时,系统将获得最高温度和能源效率。同时,为实现太阳池存储热量的有效利用,系统提热量应低于其最大提热速率。对于深度为1.5 m的小型太阳池,其下对流层全年温度在66.68~106.77℃间变化,年均能效为2.52%。同时,当以此小型太阳池为建筑面积200 m^(2)的普通住户供应日常生活所需热能时,应配套太阳池面积至少为250 m^(2)。Firstly,based on the one-dimensional transient model of solar pond,this paper simulates the thermal performance of solar pond under different structure sizes and heat extraction rates by using the finite difference method.Moreover,the integrated solar pond heating system is designed and its performance for domestic thermal energy supply is explored based on the numerical simulation results.The results show that the temperature of solar pond varies depending on the structure size,and solar pond obtains the highest temperature and energy efficiency when the optimal structural size is selected.Meanwhile,the heat extraction rate should be lower than its maximum value to achieve the efficient utilization of heat stored in the solar pond.For a solar pond with depth of 1.5 m,the temperature of LCZ varies from 66.68℃to 106.77℃throughout the year,and the average annual energy efficiency is 2.52%.Furthermore,a solar pond with area of more than 250 m^(2) is needed to meet the daily heat load demand for a normal household with a floor area of 200 m^(2).

关 键 词：太阳池 盐度梯度 数值分析 效率 储热 供热 

分 类 号：TK512.4[动力工程及工程热物理—热能工程]