Application Analysis Of Multi-Energy Complementary Small Heating System

The study of heating mode is one of the hot spots in the current rural revitalization plan and urbanization.Coal to gas and coal to electricity have encountered some problems.Single energy development and utilization show great fragility in the construction of new countryside.The development direction of new countryside construction and urbanization construction is to seek truth from facts and adopt multi-energy complementary heat supply system according to local conditions.Based on application characteristics of solar energy collection Heating,air source heat pump heating and gas water heater heating in rural buildings,a set of heating systems with solar collector heating,air source heat pump heating and gas water heater heating is designed.Each heating unit can be combined and complementary to each other.Through theoretical analysis and extensive experimental research,some valuable conclusions are obtained.A mathematical model of multi energy supplementary heat supply system is established.The mathematical models of solar collector heating unit,air source heat pump heating unit and gas water heater heating unit are established respectively.The control strategy of the system is given,and the mathematical model of double coil heat storage tank is studied.A multi energy supplementary small heat supply system experimental platform was built and experimental research was carried out.The working principle of the experimental system is analyzed.The operation performances of solar energy heating unit,air source heat pump heating unit and gas water heater heating unit are tested and analyzed respectively,and the complementary operation among the three heating units is tested and analyzed experimentally.The optimal design of multi energy complementary small heat supply system is carried out.The objective function is the minimum initial investment,the lowest annual operating cost and the largest comprehensive energy efficiency ratio.Orthogonal experiment method and enumeration method are used to optimize the different combinations of the three heating units,and the corresponding system configuration scheme is obtained.Taking a two-storey building in Shunyi,Beijing as the research object,the optimal design of heating system was carried out.Finally,an optimal heating system consisting of heat pump and hot water heater was determined.The optimal design model was further validated by a case study.