Analysis on natural convection numerical calculation of the connection tube of the solar thermal collector

This paper takes the solar collector connection tube of the balcony hanging solar water heater as the numerical calculation model of FLUENT. By using standard k-s turbulence model and natural convection Boussinesq model for the three-dimensional numerical simulation of the natural convection features of solar collector tube, the distribution of the vadose water speed and temperature within the collector tube has been obtained, and the numerical calculation results are generally consistent with the experimental observation. The calculation results show that the heat transfer effect can be enhanced by increasing the heat transfer power of the horizontal heat pipe or by raising the inlet water temperature. The influence of different heat collector slant angles on the heat transfer result is studied in this paper as well.