Effect of combined mechanical air supply for floor radiant heating based on CFD technology on human thermal comfort
Computational fluid dynamics numerical simulation method was used to explore the influence of two kinds of air distribution changes on human thermal comfort in the form of floor radiant heating combined with mechanical air supply.According to the simulated average temperature,humidity,wind speed and their distribution of the working area,the human body comfort under the two working conditions was explored.The thermal comfort of human body was quantitatively evaluated by comparing the temperature difference between head and foot,vertical temperature difference and thermal comfort index of predicted mean vote and predicted percentage dissatisfied.The results showed that when the air speed and temperature were the same,the average temperature of the lower air supply face and the upper air supply face were basically the same,the wind speed increased by 0.02 m·s-1,and the humidity decreased by 0.6％.The air temperature stratification of the upper air supply was more obvious.The temperature difference between the head and foot of the two was 0.09 ℃ and 0.02 ℃ respectively,which would not make people feel uncomfortable.The predicted mean vote and predicted percentage dissatisfied values of the upper and lower air supply air distribution were-0.18,6％.All of them met the requirements of GB/T 33658-2017.After comprehensive consideration of indoor temperature distribution and temperature difference between head and foot,it showed that the airflow organization effect of lower air supply was better in floor radiant heating compound mechanical air supply.
thermal comfortcomputational fluid dynamicsair supply positionpredicted mean votepredicted percentage dissatis-fied
万方数据
维普
