Study On Air Distribution Of Air Conditioning In Hotel

This paper expounds the importance of indoor air quality and summarizes the research trends of different air flow organizations,indicating that it is effective to use computational fluid dynamics to simulate indoor space.The research object of this subject is a private room of a hotel in Beijing,and the numerical simulation model of air flow organization of four kinds of air conditioning is established according to the data of the building and climatic parameters of the city,and the indoor temperature,wind speed and pollutant concentration were simulated by FLUENT software.The k-? model and the wall function method are applied to the boundary conditions and the k-? two equation turbulence model and SIMPLE algorithm are used in calculating.Numerical simulation are made to test the four kinds of air-flow organization including sending from above and flow out from above on the same said,sending from above and flow out from above on the different said,Displacement ventilation1(the air send from under the table and spread around)and Displacement ventilation2(the air from the lower part of a wall),and the simulation result are used to analyze on the aspects of velocity filed,temperature filed and pollutant concentration respectively.The average values of different planes and points are taken as the analysis objects to describe the four kinds of airflow organization,then the simulation results are compared in the three aspects mentioned before.The results show that traditional air flow organizations like sending from above and flow out from above on the same said and sending from above and flow out from above on the different said can meet the basic requirements of temperature and wind speed of comfort air-conditioning,and the latter turns out to be more effective.However,in these two ways,the control of pollutant concentration is lacking.The ventilation mode of displacement ventilation 1 and displacement ventilation mode of 2 not only can meet the requirements of temperature and wind speed,but also has a good effect on the control of pollutant concentration.In order to verify the validity of the numerical simulation results,the model sending from above and flow out from above on the same said is adopted to measure the Characteristic point temperature in a cell model.The measured data are compared with the numerical simulation results under the same conditions and the corresponding positions,thus the rationality of the numerical simulation results is verified.The research work has carried on the more comprehensive calculation and analysis to the air flow organization mode of the air conditioning in the hotel,and the conclusion provides a useful reference for the design of the air conditioning system.