Temperature And Humidity Independent Control Of Air-conditioning Systems Adaptability In Green Office Buildings

With the rapid development of China's social economy and the rapid rise of the construction industry,building energy consumption has become China's third largest social energy consumption.Because of its low consumption,economic and environmental advantages,green building has become a necessary means of sustainable development in China.The thermal and humidity coupling control of traditional air-conditioning system in green building leads to high energy consumption and poor comfort.And THIC air-conditioning system overcomes the disadvantage of traditional air-conditioning system and it is inevitable to apply it to green building.This paper analyzed the adaptability of THIC air-conditioning system from the perspectives of economy and energy consumption of green office buildings,and divided the wet hours area suitable for China's green office buildings.Firstly,the operating mechanism,advantages and disadvantages of different THIC air-conditioning systems were summarized,and compared with traditional air-conditioning systems,they have energy-saving and comfort advantages.And the integrated COP mathematical models of different THIC air-conditioning systems were developed to provide preliminary screening basis for energy consumption calculation.Secondly,based on the number of hours when the moisture content of outdoor air is greater than 12g/kg and annual working hours of 3285 h,the humidity hours of 242 cities in China were counted and summarized,and the humidity hour area was preliminarily divided.Then,the physical model of a green office building in Beijing was modeled by SketchUP.Taking this physical model as an example,EnergyPlus was used to simulate hourly load plus time frequency energy consumption calculation method,and the energy consumption of different THIC air-conditioning systems in typical urban of four wet hours areas in summer was simulated and calculated.Urumqi is a typical city for the area of wet hours ?,and these three THIC air-conditioning systems have little difference in energy efficiency.Harbin is a typical city for the area of wet hours ?,The order of energy saving is: Heat pump type double stage runner desiccant air-conditioning system>Heat pump heat recovery dual temperature cold source air-conditioning system > Heat pump type two-stage solution dehumidification air-conditioning system.Beijing is a typical city for the area of wet hours ?,The order of energy saving is: Heat pump type double stage runner desiccant air-conditioning system>Heat pump type two-stage solution dehumidification air-conditioning system>Heat pump heat recovery dual temperature cold source air-conditioning system.Haikou is a typical city for the area of wet hours ?,The order of energy saving is: Heat pump type two-stage solution dehumidification air-conditioning system>Heat pump type double stage runner desiccant air-conditioning system>Heat pump heat recovery dual temperature cold source air-conditioning system.Finally,based on the energy consumption index,the adaptability of different THIC systems in green office buildings is analyzed by using the dynamic recovery annual limit method,and the classification standards of equipment recovery years grade and dynamic recovery years grade are put forward.Based on the number of wet hours and the years of dynamic recovery,the THIC wet hours area suitable for green office buildings are obtained through the comprehensive analysis of energy consumption and economy,and the adaptability of different THIC air-conditioning systems in green office buildings is analyzed in an all-round way.In the THIC wet hour ?area of Urumqi as a typical city,the three kinds of THIC air-conditioning systems studied in this paper are not suitable for the green office buildings in this area.In THIC Wet hour area with Harbin as a typical city and THIC Wet ?hour with Beijing as a typical city,the most suitable ? air-conditioning system is heat pump heat recovery dual temperature cold source air-conditioning system.In the THIC Wet hour ?area with the highest average wet hours,the air-conditioning system which is most suitable for the green office building in this area is the heat pump type two-stage solution dehumidification air-conditioning system.