Experiment research on control strategy of solar phase change thermal storage floor heating system in severe cold zone

The heating period in Xinjiang area is up to 6 months, and annual solar energy distribution is about 5 800 MJ/(m2·a), which provides favorable conditions for solar thermal utilization. One of the issues of solar energy heating is how to solve the contradiction between the unstable solar energy and the continuous building heating demand. Taking an office building in Urumqi as an example, constructs a hybrid solar phase change thermal storage floor heating system. Experimentally studies the effect of the solar collector inlet and outlet temperature and the system operation mode on indoor heating in the different solar radiation intensity, obtains the heating capacity, thermal storage capacity and make-up heat capacity of the system, and summarizes the control strategy of this hybrid system.