Research On Application Of Gas Wall Hanging Furnace Complementary Solar Heating Technology

With the continuous expansion of cities and people’s increasing requirements for thermal comfort of the building’s thermal environment,existing urban district heating and traditional decentralized coal hand-fired boiler heating are difficult to solve the contradiction among thermal comfort,environmental protection and energy conservation,so it is urgent to vigorously develop renewable and clean energy distributed heating technology.The paper first proposes and designs a gas wall hanging furnace complementary solar heating and heating system,and the calculation methods for the selection of various equipment in the system is given.Using the solar radiation meteorological parameters of the typical meteorological year in TRNSYS to calculate the solar heat collection variation under the different inclination angle of the solar generator to determine the optimal inclination angle of solar collectors in the heating season of Xining City and other major cities in China.Secondly,taking a farm building in Xining as an example,the time-dependent thermal load simulation calculation of the building during the heating season was performed,and a TRNSYS dynamic simulation model of a gas wall hanging furnace complementary solar heating system was built.By analyzing the system heating seasonal solar guaranteed rate and system net income change under different collector areas,the system’s optimal collector area design value was determined,and then take the solar guaranteed rate as the optimization target,the thermal storage tank volume optimization study was carried out,which provides a design idea to promote the use of the system in China.Finally,based on the above-mentioned TRNSYS dynamic simulation data,the performance of the solar collector,the temperature change rule of the hot water storage tank,and the thermal efficiency of the gas-fired wall-hung boiler were discussed and compared.The application of the gas wall hanging furnace complementary solar heating system not only has significant economic and energy saving benefits,but also can effectively reduce carbon dioxide emissions during the heating season and achieve the effect of energy saving and emission reduction.