Research On Thermal Insulation And Hygroscopic Mortar And Air Carrying Energy Radiant Air-conditioning System

The problem of hot and humid environment in buildings has always been one of the focuses of people’s continuous attention,and how to reduce energy consumption and improve thermal comfort has always been a research hotspot.The humidity control material can passively adjust indoor humidity to reduce energy consumption,while airborne energy radiant air conditioner can reduce condensation risk、conserve energy and get high comfort.Therefore,the research object of this paper is thermal insulation and hygroscopic mortar and air carrying energy radiant air-conditioning system(ACERS).The following are the specific research contents:Firstly,the radiation plate was used as the object,and the air-heat-wet process of the radiant panel as the surface cooler was analyzed by h-d diagram method.The theory is based on the air treatment point of view,the radiation panel is analogous to the special "cooler".In the case of heat and humidity treatment of indoor air,there are two cases: dry condition and wet condition.Under wet conditions,the radiant panel performs the enthalpy reduction and dehumidification cooling treatment on the air,and the radiant panel bears both the sensible heat load and the latent heat load.At the same time,the author also gives three methods for calculating the latent heat load of the radiation board,which can be used in the CFD simulation boundary.The ACERS also has this characteristic for analogy analysis.Then,the preparation and comprehensive properties of thermal insulation and hygroscopic mortar were introduced.And the author used the thermal insulation and hygroscopic mortar in the existing residential building for experimental research.In the dry and cold weather conditions,the experiment is carried out under four typical working conditions: steady-state closing windows、 window opening、air conditioning and air conditioning with window opening.The research results show that under these four working conditions,the humidity control thermal insulation mortar can adjust the indoor humidity、improve the indoor thermal comfort and save energy concurrently;Compared with the ordinary mortar room,the indoor temperature of the humidity conditioning room and the temperature of the inner wall of the outer wall should be about 1.5 ℃ higher,the relative humidity is about 10% lower,the moisture content is lower than 0.5g/kg·dry air,and the temperature and humidity distribution in the room is relatively uniform.Finally,the thermal insulation and hygroscopic mortar is combined with the ACERS,and the simulation is carried out by CFD numerical simulation method to simulate the hot and humid environment in the room when there is no thermal insulation and hygroscopic mortar.The results show that the temperature distribution of the air conditioning zones in the two simulated rooms is relatively uniform and the size is about 21.5 ℃.Compared with the ordinary mortar room,the relative humidity of the humidity-conditioning mortar room in the air-conditioned area is about 10% lower,which is basically consistent with the trend of the third chapter experiment.At the same time,the lower part of the orifice plate has a low temperature boundary zone to prevent condensation,and the dew point temperature of the Z=2.495 m section in the humidity conditioning room is larger than the minimum temperature of the orifice plate,so the two have better anti-knot Dew characteristics and thermal comfort after a cooperative work.The thermodynamic treatment of the radiant panel as a "cooler" can provide new ideas and calculation methods for the radiant panel composite cooling system,and the method for solving the latent heat load can be used for CFD simulation of ACERS.Cooperating the thermal insulation and hygroscopic mortar with the ACERS can further reduce the risk of condensation and provides a possibility to improve indoor thermal comfort.