Experimental study on indoor thermal comfort of different heating terminals

Measures the distributions of indoor air temperature, humidity, air velocity and wall surface temperature in four different heating terminals including fan coil, ceiling radiation, sidewall radiation and floor radiation at the indoor design temperature of 18 ℃. Based on the skin temperature test and subjective questionnaire survey of 16 subjects, compares and analyses the thermal comfort differences of above-mentioned four terminals. The results show that the indoor vertical temperature difference and radiation asymmetry of the four heating terminals meet the requirements of thermal comfort. The indoor vertical temperature difference of floor radiation is minimal, the foot temperature is the highest, the thermal sensation and thermal comfort vote values are the greatest, and the overall thermal comfort vote value and thermal acceptability are higher than those of the other three terminals. When using the ceiling radiation, the thermal sensation and thermal comfort vote values on head and upper body are higher than those of the other three terminals. Under the condition that the bottom end of the capillary is 0.5 m higher than the ground, the sidewall radiation has the maximum temperature gradient from head to foot, the overall thermal sensation and thermal comfort vote are little. When the air temperature difference of ceiling radiation and fan coil is little, ceiling radiation has higher thermal sensation and thermal comfort votes because of higher black globe temperature. When evaluating the radiation environment, it needs to modify the PMV prediction.