【作者】 韩延民； 王如竹； 代彦军； 邓建；

【Author】 Han Yanmin Wang Ruzhu Dai Yanjun Deng Jian (Institute of Refrigeration and Cryogenics, Shanghai Jiaotong University, Shanghai, 200030)

【机构】 上海交通大学制冷与低温工程研究所；

【摘要】 提出一种新型结构的太阳能温度分层水箱,改善了传统水箱实现温度分层对水箱高度的依赖。借助于CFD软件,对处于相同边界条件下,结构不同的两种水箱达到稳态时内部温度场的分布进行了对比分析,发现新型结构的水箱能够在低Richardson数时实现温度分层。并以总储能焓值和可用能(火用)值为指标, 对比水箱的能量储存品质,发现新型分层水箱能够在总储能相同条件下储存更多的可用能。更多还原

【Abstract】 A new type of thermally stratified solar water tank is analyzed in this paper. Unlike the normal water tank, the thermal stratification in this new water tank is not dependent on tank height only. Under similar boundary conditions, thermal stratification effect is simulated by CFD software to compare the two kind of structural tanks on their thermal performance at the steady state. It is found that the new water tank can build thermal stratification at lower Ri number. Also, enthalpy and exergy index for energy storage are used as to evaluate the performances of the water tank. It is found that the new tank can have a high energy value than the normal one under the same external environment conditions.更多还原