Research On Heating Performance Of The Air Carry Energy Radiant Air-conditioning In The Climate Of High-humidity And Cold-winter Zone

Cold–winter and high-humidity climate zone is located in decentralized heating zone,which is characterized by wet and rainy,last up to 2-2.5 months of the coldest month(?5?)and poor insulation performance of buildings in winter.In cold-winter and high-humidity zone,it is important and difficult of air-conditioning design to meet comfortable and energy-saving requirements for buildings in winter and summer,but also to consider the initial investment and operating costs of the system.The air carry energy radiant air-conditioning system,as an newly emerging form of radiation in recent years,can meet the dual needs of heating in winter and cooling in summer.It not only has the advantages of the traditional radiation terminal system like good comfort and low energy consumption,but also solves some of its problems like easy condensation,difficult maintenance.Currently,A series of problems have been resolved in transfer energy process and condensation of the air carry energy radiant air-conditioning system in summer conditions,but the applicability of the system to heating in winter has not been studied before.Therefore,in order to verify the feasibility of the air carry energy radiant air-conditioning system applied to cold-winter and high-humidity zone,this paper will focus on the analysis of the heating performance under winter conditions,then simulates and optimizes the installation of the end of the radiant plate system by CFD software.The specific work is as follows:Firstly,to compare and analyze the heating performance of different air-conditioning systems in winter conditions,this paper takes the residential building as the research object and analyzes the indoor thermal environment distribution and system energy consumption in the experimental room,using the traditional convection air-conditioning system and the air carry energy radiant air-conditioning system.The result shows that the system is energy-saving and comfortable in winter conditions.The indoor temperature is higher than 2? and the power consumption per unit area is 4 times lower,compared to the split air-conditioning terminal.At the same time,in order to further explore the feasibility of the air carry energy composite radiant end of the winter heating in office buildings,this paper experiments on a meeting room in Shaoshan City and analyzes the system's reaction rate and the temperature rise of the indoor thermal environment by equal increment of the indoor set temperature(16?–24?).The result shows that the winter heating requirement can be met in winter when the temperature is set to 16?,and the system operates quickly and reaches steady state within 30 minutes.Secondly,in view of the diversity of the installation of the end of the radiant plate system,this paper will optimizes the typical installation methods of the air carry energy radiant air-conditioning system by the experimental data and theoretical basis.The main analysis is to study the heat transfer characteristics and air distribution.The simulation result shows that the indoor thermal comfort of the composite radiant plate is the best which the air temperature gradient does not exceed 1.5?/m.It can be widely used in future heating practice projects.In summary,the air carry energy radiant air–conditioning system not only can meet the indoor heating requirements in winter conditions,but also has the characteristics of comfort and energy saving in cold-winter and high-humidity zone.The research in this paper can provide some references for the theoretical design and practical application of radiant heating using air as the energy carrier.