Indoor Thermal Environment Simulation Of The Composite System Of Radiant Panel Heating And Cooling And Task Air Conditioning In Office

It is greatly significant to study the indoor particle distribution and movement for improving indoor air quality (IAQ) and indoor thermal comfort of the human body and promoting indoor environment. The combined system of the radiant floor heating and cooling and task air conditioning in office buildings compared with the traditional air conditioning mode has been proved to have a greater development potential, which has more obvious energy-saving and healthy comfort, etc. For the people speaking, breathing or coughing in office where they are staying many hours,the nose and mouth send out aerosol particles pollutants which carry viruses and bacteria. Suitable indoor airflow organization can discharge pollutants as soon as possible and reduce the risks of infection. The results from the application of CFD numerical simulation method that could make contributions to the aerosol particles spreading rule and accurately predicting concentration distribution as well as to the effective control of pollutants concentration of ventilation method.First of all,in order to improve simulation accuracy,we usethree particle motion models of Fluent software simulation for the experiment done in the literature. Comparing the calculated results with the experimental data, the analysis of different models suitable for indoor concentrations of particulate matter transport and the applicability of the concentration distribution. The results demonstrate that the indoor thermal environment simulation more accurate under the RNG κ-ε epsilon model predominate and DPM model for particle motion.On the basis of the above work, a certain office in Harbin, simulated calculation of the office for four. Analysis of three different radiant panel location and two cases of air supply outlet,which of the indoor temperature, velocity, PMV and pollutant concentration distribution under the winter and summer, it is concluded that the indoor environment meet the demand of the composite system design of air supply outlet and radiant panel layout position for working condition.Finally, using Fluent software for the four different cases in the form of outlet structure,to study the indoor air distribution simulation. It is concluded that pore size is 3mm orifice plate air supply outlets on indoor air distribution is the most reasonable, followed the louver outlet.