NUMERICAL SIMULATION OF THERMAL PERFORMANCE OF SALINITY GRADIENT SOLAR POND AND ITS HEATING APPLICATION
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 m2 is needed to meet the daily heat load demand for a normal household with a floor area of 200 m2.
solar pondsalinity gradientnumerical analysisefficiencyheat storageheating
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