Study On Testing And Simulation Optimization Of Air Source Heat Pump Heating System In Han Dan Area

Energy use and environmental protection have always been the focus of global attention,and the global energy development trend is gradually changing to the direction of clean energy.Nowadays,China’s energy consumption accounts for the forefront of the world,of which coal consumption still accounts for the largest proportion,the coal combustion process will have a huge impact on the ecological environment,China’s heating area is vast and mainly concentrated in the northern regions,before and after the heating season,especially in the Beijing-Tianjin-Hebei region haze weather is serious.Under China’s clean heating-related policies,heat pump heating technology has been widely promoted and applied.Firstly,the working principle of low temperature air source heat pump heating technology was introduced,combined with the building profile and relevant heating codes for building heat load calculation and equipment selection calculation,and the low temperature air source heat pump heating system was built through the selection design calculation.Secondly,a test program was developed for the low-temperature air source heat pump heating system,and tests were conducted according to the test program.The main test parameters included total supply and return water temperature of the heat pump system,circulating water flow rate,supply and return water temperature of single unit,ambient temperature,relative humidity,power consumption and other parameters.The overall operational performance of the heat pump heating system was analyzed and economic and environmental analysis was conducted.The average temperature and relative humidity during the test period were 1.8℃and 65.2%,the average daily heat production of the system was 1902.07 k W,and the average daily COP of the system was2.6.Under the same heat production conditions,the air source heat pump heating system had the lowest operation cost and fuel consumption,and the CO₂ emission reduction was38134.2 kg and 154594.2 kg compared with that of gas boiler and coal-fired boiler respectively.This shows that the heating system has good performance and good economy and environmental protection during the test period.Then,a TRNSYS low temperature air source heat pump heating model was built to simulate the weather conditions and building heat load in Handan area during the heating season,and the measured and simulated data were combined to compare and validate the unit return water temperature,unit heat production and unit operating heat production performance coefficient COP in the heating system,and it was verified that the relative errors could be concluded to be within±15%,which could verify the accuracy of the model It is convenient to optimize the simulation study.Finally,on the basis of the original model,a variable flow rate model and a solar coupling model were built and compared with the original system heat production and heating performance coefficient COP for analysis,and the results showed that the two models were better than the original system model in both heat production and heating performance coefficient COP,and the solar coupling system was compared with the solar collector area a,solar azimuth angle Azimuth,solar Slope,the rated heat load cap of the low-temperature air source heat pump unit and the volume v of the heat storage tank corresponding to the unit area are simulated and optimized for the solar coupled system.