Study On Performance Of Composite Heating System Of Thermosyphon Radiator And Air Source Heat Pump

At present,China's environmental and energy problems are getting worse.In the traditional heating method,the large consumption of coal is an important cause of this crisis.The air source heat pump operates on the principle of “anti-Carnot cycle”,and its operating efficiency is greater than 1,which has the advantages of high efficiency and energy saving.Therefore,the use of air source heat pumps can significantly reduce the amount of coal used compared to other heating methods,thereby mitigating environmental and energy crises.However,the traditional air source heat pump utilization method cannot balance the comfort and energy saving of heating.To this end,this paper proposes a heating end of a thermosyphon radiator,and conducts a performance study on the air source heat pump system combined with the thermosyphon radiator.The study found that the efficient heating end can further improve the performance of the air source heat pump system,while also improving the thermal comfort of the heating room.The main research contents are as follows:Firstly,this paper selects an office room in the Taiyuan area of Shanxi as the research object,and conducts on-site testing of the thermosiphon radiator and the air source heat pump composite heating system.The outdoor temperature of the test room,the indoor temperature,the surface temperature of the thermosyphon radiator,the suction pressure of the compressor of the air source heat pump unit,the exhaust pressure,the heating power of the heating system,the input power and the COP were actually measured.The results show that the indoor temperature remains at around 21 °C with the fluctuation of the outdoor temperature,showing good comfort and stability.The thermosiphon type heat sink has a large temperature rise rate and a fast thermal response during the startup phase of the system.The suction and discharge pressures of the compressor were stable during the test.Although the discharge pressure of the compressor increased with the decrease of the outdoor temperature,the maximum discharge pressure of the heat pump unit was still met.During the test period,the average outdoor temperature was about-3.2 ° C,and the average heating COP of the new heating system was about 2.82.Compared with the air source heat pump + floor radiant heating system,the new heating system is more efficient.In addition,this paper uses SketchUp software to build a building model,using EnergyPlus software to simulate the calculation of the building model in the severe cold climate zone(Shenyang),cold climate zone(Taiyuan),summer hot winter cold climate zone(Wuhan),new heating The heating supply,energy consumption,operating costs and pollutant emissions of the system during operation.And compare the energy consumption,operating cost and pollutant discharge of the electric boiler and coal boiler heating system under the same heat supply.The study found that the thermosyphon radiator and the air source heat pump composite heating system have obvious economic and environmental advantages compared with other heating systems.Therefore,the new heating system proposed in this paper can meet the needs of users during winter heating and has high operating efficiency.Compared with the electric boiler and coal boiler heating method,the system has certain advantages in terms of economy and environmental protection.