Influence of mean radiation temperature on thermal environment evaluation index of industrial plants
To explore the influence of radiation on indoor thermal environment evaluation,the effect of the mean radiation temperature on indoor thermal environment evaluation index wet-bulb globe temperature(TWBG)was studied.The air temperature,relative humidity,air speed and TWBG of different work sites were tested in a foundry workshop.The variation law of mean radiant temperature and air temperature in the foundry workshop was analyzed,and the influence of the difference between mean radiant temperature and air temperature on indoor TWBG was revealed.The changes in thermal environment parameters such as air temperature,mean radiation temperature,and relative humidity with indoor TWBG were studied.The compensation relationship between environmental parameters and mean radiation temperature was revealed.The results show that the mean radiation temperature is approximately 10 ℃ higher than the air temperature in the foundry workshop,and the difference between the mean radiation temperature and the air temperature has a significant impact on the indoor TWBG.As the indoor TWBG increases,the mean radiation temperature and air temperature increase while the humidity decreases.The air temperature and mean radiation temperature increases by an average of 1.75 ℃ and 3 ℃,and the relative humidity decreases by an average of 5 percentage point when the TWBG increases by 1℃.When the TWBG reaches occupational exposure limits,the range of foundry workshop air temperature is 34.4-35.3 ℃,the range of mean radiation temperature is 28.2-33.4 ℃,and the range of relative humidity is 57.9％-60.9％.To maintain the identical TviBG,the air temperature reduces by 0.2-0.4 ℃ or the relative humidity increases by 1-2 percentage point to compensate when the mean radiation temperature increases by 1℃.The research results can provide a reference for the design of indoor environmental parameters and thermal environment evaluation of industrial plants.
safety and hygiene engineering technologyindustrial plantsmean radiation temperaturewet-bulb globe temperature
万方数据
维普
