Research On The Development & Application Of Solar Radiant Floor Heating System

Solar energy as an inexhaustible, renewable energy known as the 21st century, is one of the most important energy. It is very important in energy conservation, reduce pollution and improving people's standards of life.Based on the characteristics in the north of China that village dwellings is relatively dispersed and full of solar energy, taking village dwellings in Shijiazhuang for example, propose a heating system—solar radiant floor heating system.According to geographical location and climate conditions in Shijiazhuang, we made theoretical analysis and design calculation on solar radiant floor heating system. Based on the analysis of the distribution and utilization of solar energy resources, we chose a suitable solar heating system; identified for local collector medium; considering the utilization rate of solar heating system, we calculated the area of solar collector and volume of heat storage; decided the power of aidde heating system by the heating load for space heating; according to the distribution mode, purpose and direction, determined the radiant floor heating pipes piping mode, pipe pitch; selected the appropriate control system to make sure it would control and run automatically.In order to verify the correctness,feasibility and reliability of the design calculations, did the work include construction and installation, testing and experimental research. Selected representative weather conditions for analysis, include the days of fine ,cloudy and overcast, measured the solar irradiation, water temperature in heat storage system, indoor temperature and outdoor temperature, and made analysis about the data.The test results show that the quantity of heat the solar collector collects in the fine days can work 2～4 hours at night and the indoor temperature can reach about 15℃; after stopping the floor radiant heating system, the indoor temperature changes a little. It can fulfill the needs in heating the house. In the cloudy days and overcast days , it can't and the aided heating system will work for some hours.The test shows that the system operates in a good and reliable condition, and it can meet the requirement of design. It has nice economic and enviroment benefits and is worthy of promotion.The research can be taken as a example in doing other works about heating in Shijiangzhuang region, such as designing and constucting, etc.