Simulation and Experimental Study on Temperature Field of Heat Storage Spherical Tank
Based on the actual demand of new energy storage such as megawatt compressed air energy storage and the consumption of renewable energy power with high proportion for large-scale high and medium-temperature medium energy storage technology,more and more engineering projects use large-scale pressure spherical tanks as heat storage vessels.Spherical tanks have obvious advantages such as the smallest surface area of the same volume and higher pressure bearing capacity than column tanks.The application of heat storage in the temperature stratification of water is less.In this paper,the internal temperature field of large-scale heat storage spherical tank in the process of high parameter wa-ter heat storage and heat release is studied by means of simulation and test,and the temperature change in the tank,the water volume of the thermocline and the heat storage efficiency of the spherical tank are compared and analyzed.The experimental results show that the actual heat storage efficiency of 200 m3 spherical tank is more than 91%by optimizing the water distribution design.The results of this paper verify the feasibility of the spherical tank as a new water heat storage vessel,especially in the high-pa-rameter water heat storage system with high temperature and cold temperature water in the same tanks,and provide a beneficial reference for the design and application of the subsequent large-scale medium-temperature spherical tank heat storage system.
new energy storagespherical tank for heat storagethermoclineheat storage efficiencymedium-temperature heat storage system
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