Research On Indoor Humanthermal Response Based Onsolar Radiation

A large number of glass curtain wall are used as the outer protective structure in modern buildings,and more interior space of the building is exposed to solar radiation.The sunlight entering the room will affect the indoor thermal environment and form an asymmetric temperature field.At the same time,the sunlight will inevitably hit the human body directly,causing the rise of radiated area temperature and thermal sensation of human body.At present,most researches focus on the influence of solar radiation on indoor thermal environment and thermal sensation,while few researches pay attention to the change of human thermal physiological parameters under solar radiant.This paper uses a solar radiation simulation device in an artificial climate room to conduct a laboratory research.The solar radiation intensity and indoor temperature are strictly controlled.By collecting the human subjective thermal comfort evaluation(thermal sensation and thermal comfort and thermal acceptable degrees)and the related heat sensitive physiological parameters(the skin temperature,skin blood flow and heart rate),to quantitatively evaluate the influence of solar radiation on human thermal comfort.A total of 18 healthy college students were recruited in this paper.They were wearing typical winter clothing(1.21clo)in an indoor environment at 22℃,and conducted experiments with radiation intensities of 200W/m~2,300W/m~2 and400W/m~2.The results show that in the thermally neutral environment,when the solar radiation directly radiates the human body,the thermal sensation vote of the human body will increase.However,due to the asymmetric effect of radiation,the thermal comfort and thermal acceptability of the human body will decrease under long-term irradiation.As for the influence of solar radiation on physiological parameters,the heart rate did not change significantly during the irradiation process,while the skin surface blood flow showed a good regulation ability of skin blood vessels with a large range of changes.This paper quantitatively reveals the influence of solar radiation on the subjective thermal comfort evaluation of human body,monitors the changes of related physiological parameters,and elaborates the mechanism of parameter changes from the physiological point of view,and obtains the comfortable skin temperature range under the influence of solar radiation through linear fitting formula.The relevant conclusions can be used to optimize the design of HVAC system under solar radiant in winter.