Comparative study on field test of thermal comfort of different air conditioning system terminals

Conducts the indoor environment test and the on-site investigation of human thermal comfort in 12 office building cases using radiant floor, radiant ceiling and convection terminal air conditioning systems, respectively. The main research is to study the human thermal sensation changes with the operating temperature under different air conditioning system terminal conditions. The test finds that the neutral operating temperature of the human body in various air conditioning terminal environments is almost the same, about (25.4±0.1) ℃. However, the thermal comfort sensitivity (TCS) to temperature changes under different terminal conditions is quite different. The human body is the most sensitive to temperature changes in the radiant ceiling environment and the least sensitive in the radiant floor environment, and the convection terminal environment is at the middle level. The explanation given in this article is that the parts of the human body mainly affected by the terminal heat transfer in different air conditioning systems are different, and the cold spot density of different parts of the human body is different, which leads to obvious differences in TCS.