How much humidity does human body feel comfortable?

When the air relative humidity is 50%-60%, the human body feels most comfortable. 1 Influencing factors of human thermal comfort. 2. How to combine the requirements of human thermal comfort in HVAC scheme design? 3. The human body's response to the dynamic environment. 4. The physiological and psychological basis of human body's response to hot and humid environment. 1. Human thermal balance. 1. Basic physiological requirements of human body: 1. Metabolic rate: the rate at which the human body releases energy in chemical reactions. The temperature of different parts of the human body is different, and the organ with high metabolic rate has higher temperature. Air humidity is the degree of air dryness or humidity, which is usually described by relative humidity in meteorology. It is expressed in percentage, that is, the ratio of the actual vapor pressure in the atmosphere to the saturated vapor pressure at the same temperature. If there is no water vapor in the atmosphere, the relative humidity is zero; When the vapor pressure in the atmosphere is equal to the saturated vapor pressure at the same temperature, it means that the vapor content in the atmosphere is saturated and the relative humidity is 100%. Therefore, the greater the percentage of relative humidity, the greater the air humidity. Humidity is closely related to industry and agriculture, people's daily life and health. For example, in the south where summer is long and humidity is high, ventilation, moistureproof and moistureproof must be considered in architectural design. So that wind energy from cross flow or corners can be blown slowly, and indoor hot and humid air can be eliminated. Therefore, a unique climate architectural style has been formed for thousands of years, such as "building bamboo buildings in the southwest to prevent moisture". In modern urban architecture, skyscrapers have sprung up, and underground buildings have also been launched. The regulation of microclimate in underground buildings, especially the regulation of humidity, must be paid enough attention. Humidity is closely related to human health. Because the human body can only maintain physiological balance through thermal metabolism and water and salt metabolism. For example, in hot summer, the human body mainly relies on sweating and evaporation to lose excess heat to maintain a body temperature of 37 degrees. When the air humidity is low, the air can easily absorb the moisture of the human body and make it evaporate and dissipate heat normally; When the air humidity is high, the sweating and evaporation of the human body are blocked, and the excess heat in the body is difficult to be discharged in time, and people will feel sultry and even heatstroke. In addition, hot and humid weather can make people upset, impatient, impulsive, and even behave abnormally; High temperature and humidity can also cause pinkeye epidemic. The invasion of moisture is also the chief culprit of rheumatoid arthritis, osteoarthritis, diarrhea, edema, loss of appetite, chest tightness, drowsiness and limb pain. Chinese scientists have pointed out that when the temperature is 18-22 degrees and the relative humidity is about 50%, the human body is most comfortable. When the temperature is 26 degrees and the relative humidity reaches 90%, people feel that the temperature seems to be 32 degrees and the relative humidity is 20%. When the temperature is higher than 36 degrees and the relative humidity is above 50%, the number of heatstroke will increase obviously. It can be seen that the comprehensive effect of high temperature and high humidity has the greatest impact on human health, so remind friends to take precautions.