Application Of GSHP+ASHP+solar Energy Complementary Heating System In Northern Urban Towns

At present,small sized boilers which are featured by high energy consumption,small capacity and scattered distribution are widely used in the northern region.The environmental problem it brings has become one of the important factors causing haze weather and cannot be underestimated.In the case of the increasingly serious environmental problems,seeking a heating method powered by clean energy has become an urgent task to alleviate the problem of pollution in China.Nowadays in the context of multi-building energy technology,the development of multi-energy system obtains much concern.The key to promote the use of the multi-energy system to lager areas is achieve a desired energy-saving environmental protection target and the economic feasibility.Based on the above background,and relying on China's large-scale renewable energy development projects,we use the energy consumption simulation software TRNSYS for mathematical modeling of the multi-source complementary heating system,and then carry out a research combined with context analysis and system optimization.Multi-source complementary heating system involves the coupling and complementation of a variety of energies.The connection between different heat sources requires consideration of performance characteristics,and for different heat sources there are different control modes of the operation system.Taking solar energy,air source and geothermal energy as clean renewable energy sources,we build a multi-source complementary heating system based on the ground source heat pump,the air source heat pump and the solar energy.The system is designed to combine the cleanliness and timeliness of solar energy,the stability and high investment performances of ground source heat pump,the lower initial investment and high operating costs and their superiorities in wide distribution range and high energy utilization efficiency.And then,based on the simulation of TRNSYS software,we adopt the GHP-library module and HVAC-library module to establish the model of soil source heat pump system and make a simulation.Meanwhile the control parameters of each heat source were optimized according to different scenarios.In order to realize the practical engineering application value of the system,this project simulates the energy consumption with the example of 50 square meters of residential buildings in some one small town in the northern area,and optimize for the control of different situations on the TRNSYS platform.Considering the circumstances of the heating hot water temperature guarantee situation,the average temperature changes(the reduction and recovery)of the subsurface soil and the conditions of cop system of the annual heat pump unit,we take the annual cost as optimal goal to get a best plan with the impact of the heat supply ratio of the residential building of different climates and the capacity of the supply / storage tank.Then compared with the current local heating charge standards,we determine the feasibility of its application.Finally,the situation of heating in the regional context is analyzed under the influence of multiple factors,such as different climate zones,equipment costs,price level,different loan interest rates and so on.With the result of different impact factors on the heating design program,we get the feasibility plan and program environmental benefits for the small town community in the northern town using the clean energy heating in many scenarios,which provides a theoretical basis for renewable energy heating with multiple heat sources.