| With the development of the economy and construction industry,the problem of energy consumption is becoming more and more serious.Now is the era of economic globalization,each country will have a lot of business,in order to enhance the country’s comprehensive national strength,improve people’s living standards,most countries to develop their own infrastructure construction,so the proportion of building energy consumption in all energy consumption increased,and very obvious.Near zero energy buildings can use renewable energy to heat and cool buildings,it can adapt to climate characteristics and site conditions,heating,air conditioning,lighting and other needs can be reduced by passive architectural design,energy equipment and system efficiency can be maximized through proactive technical measures,largely using renewable energy provides a comfortable indoor environment with minimal energy consumption.Multi-renewable energy coupling energy supply system is a new energy supply system,with near zero energy consumption buildings,renewable energy system will become a very competitive energy supply method,to solve the problem of single use of various types of energy.In this paper,a nearly zero energy consumption building in Shenyang is taken as the research object to monitor its annual energy consumption for a long time,record and analyze the annual total energy consumption of cooling and heating of low energy consumption buildings;through the analysis of a large number of data and trsnsys software simulation analysis,single air source heat pump system,single ground source heat pump system,PVT curtain wall coupled air source heat pump system,PVT are combined The phase-change energy storage system of curtain wall coupled dual source heat pump system and PVT curtain wall coupled dual source heat pump system is simulated and analyzed,and the efficient matching mode of multi energy coupling system is obtained by comparing the experimental data analysis and simulation results.Through the simulation of the PV curtain wall coupled air source system,and through the data collection of the monitoring platform,it is concluded that the change of the PV curtain wall cavity temperature and the COP value of the air source heat pump unit is the trend of first increasing and then decreasing.The maximum COP value is 4.52 and the average COP value is 4.4 from 12 to 14 noon,and at this time in the whole heating season The interstage can ensure the continuous operation of the system.Through TRNSYS software,the author simulated and analyzed the five energy systems mentioned above,and obtained the efficient matching mode of the multi energy coupling system of the near zero energy consumption building in the severe cold area.According to this matching mode,the COP value of the whole heating season is 3.78,which is 20.1%higher than that of the single air source heat pump system and 30.3%higher than that of the single ground source heat pump system.Based on the long-term monitoring of the near zero energy consumption building,this paper analyzes the energy consumption of cooling and heating of the near zero energy consumption building,and provides data support for the actual operation energy consumption of low energy consumption buildings in China.Through data analysis,it is concluded that according to the simulated high-efficiency matching mode,the COP value of the actual coupled heat pump unit is 3.56,and the deviation from the simulation is 5.8%,which shows that the above matching mode of high energy efficiency is There is a certain applicability in the multi energy coupling system of near zero energy consumption buildings in severe cold area. |
