Field Synergy Analysis of Thermal Storage Effect of Solar Energy Storage Tank

The internal structure of solar energy storage water tank partition design was carried out in this paper. The energy storage tank with different internal structure had been simulated to analysis convective heat transfer mechanism in the water tank by using CFD method. The temperature stratification mechanism of water tank had been deeply analysed to improve the availability of storage tank as the goal based on the heat transfer and flow field synergy theory. The calculation results showed that the partition plate in the water tank could obviously improve the effect of hot and cold stratification of the water tank, so that a good effect of cold and hot stratification from left to right could be achieved; The influence of flow field on temperature field had been studied by analyzing the degree of synergy between velocity vector and temperature gradient vector, The flow resistance, drag reduction mechanism and influencing factors in the water tank were studied by analyzing the synergy between the velocity vector and the pressure gradient vector; Through the adjustment of internal structure and the change of water flow and heat transfer and pressure gradient direction, that was to change the angle between the velocity and the temperature gradient and the velocity and pressure gradient, and It could effectively improve the energy storage and delamination effect of the water tank; and provided a theoretical basis for the future design of efficient solar energy storage tank with low flow resistance. (C) 2017 The Authors. Published by Elsevier Ltd.