Design And Analysis Of Energy Supply System Of "Sion-German Energy Conservation Demonstration Center"

At present,in our country and the world continue to research and promote the ultra low energy consumption building.Ultra low energy consumption building energy saving,energy saving,high energy utilization,is an important means to ease the energy crisis.The subject of this paper is the"Sino German super low energy consumption demonstration center" as the research object,"passive priority,active optimization" as the idea,strengthen the thermal performance of building envelope,make full use of solar energy,geothermal energy,air energy and other renewable energy,design a new energy system,reduce the large energy consumption caused by winter heating in cold regions.The building is still the first in the cold region.This topic according to German ultra low energy demonstration center building design,research and analysis energy system,the PVT solar air heating system,phase change heat storage system,dual source heat pump system integrated design,a phase change storage design for technology and PVT,air source geothermal ground source heat pump combined with energy supply system.PVT set design,which is based on the solar radiation intensity and heat collection efficiency,the PVT set of flat plate type 260m2 is determined.The heating area of the PVT is 170kwh,which meets the requirement of building heating.After selection and comparison analysis,the phase change materials,dosage optimization and encapsulation were determined.The total storage capacity of 137kw was 1/2,and the volume of the storage tank was 6m3,which was the same as the conventional volume of the heat storage capacity.During the day will be PVT system set heat storage in the phase transition in the tank,night storage of energy release,can satisfy the construction 9.5 hours of heating load,save night system power consumption.Air source and ground source heat pump design is in traditional ground source heat pump based on the increased air-cooling fin evaporator,air source heat pump and ground source heat pump two machine are combined into one,air energy and geothermal energy complementary,single soil source heat imbalance,air source heat pump low-temperature operation difficult to solve such problems.Using TRNSYS simulation software to build energy system model,the new energy system running state simulation,the results show that the air source heat pump,air source condition is significantly higher than the ground source.According to the simulation results,the design takes the air source and the ground source as the supplementary control scheme,and the control program is compiled to the communication language of the adult,and realizes the automatic control of the energy system.Energy system uses SIEMENS Apogee building monitoring platform,the building indoor and outdoor heat moisture environment,air quality,energy supply operation status and other monitoring,according to the monitoring results analysis,control of energy integration system complementary operation,the realization of the platform for automatic control system.Energy system using server SQL database,the collection of a large number of data for screening analysis,and upload to the Internet to share.Energy system analysis and energy efficiency analysis results show that,for the ultra low energy supply system in cold regions,the investment growth rate is small,relative to the gas furnace + cold water unit system investment recovery period is only 3.25 years,saving coal every year to reduce CO2 emissions 8260 kg.The new energy supply system design,ultra low energy consumption building in the cold region to promote the application of energy-saving significance,for energy-saving emission reduction work has laid a solid theoretical foundation.