Study On Technology Of Solar Phase Change Regenerative Heating System

Under the dual situation of energy exhaustion and environmental pollution,solar heating project is widely used in engineering practice.At present,solar heating system USES ordinary water tank for heat storage,which has serious heat loss,low heat storage density and large space.Compared with sensible heat storage in ordinary water tank,latent heat storage has the advantages of large heat storage and stable temperature during phase change.If the solar heating system is combined with phase change heat storage technology,the energy can be saved better.The present research on phase change heat storage of solar energy heating system is mainly for the development of phase change materials preparation,phase change material encapsulation technology research and optimization of phase change heat storage device improvement,etc.,and for the entire system,after adding phase change heat storage device to solar heating system for few studies the influence of heating system,solar heating and phase change heat storage units in the study of the reasonable matching of the system also is less,this paper makes the following work around these two questions:(1)Combined with the solar radiation intensity and ambient temperature data of the heating season in Baotou region,this paper designed the solar heating system for urban buildings and introduced its operating principle,and obtained the experimental data of the heating system in the heating season of Baotou region in 2018-2019.(2)Establish the mathematical model of each component in the solar heating system,and then establish and simulate the overall mathematical model of the system.By comparing with the experimental data,the error between the simulated value and the experimental value of the fan coil outlet air temperature,the collector outlet temperature,the temperature inside the water tank and the return water temperature of the fan coil are all within a controllable range.In other words,the mathematical model of the solar heating system is proved to be reliable by the experiment.(3)On the basis of the solar heating system model,the matching method of the solarphase change regenerative heating system was summarized by coupling the phase change material module.The results show that the electric heating frequency of solar phase change regenerative heating system decreases,the utilization rate of solar energy is improved,and the temperature fluctuation in the water tank decreases.Solar phase change heat storage heating is a kind of very potential new-type technology,through the economic benefits of the phase change heat storage of solar energy heating system,comprehensive evaluation of energy-saving benefit,environmental benefit and has a better overall efficiency,the phase change heat storage for solar energy heating technology in the application of the western region in China provide certain theoretical basis and technical support.