Study on the thermal environment in underground mall space for temporary stay of people who cannot return home and their physical effects on the sleeping environment

As a result of the investigation of the thermal environment in the underground mall space without air conditioning and the sleep experiment assuming night stay, the maximum temperature in summer without air conditioning was almost the same as the maximum temperature of outside air. However, the lowest temperature in winter was warmer than the lowest outside temperature, and the thermal environment advantage of the underground mall was confirmed. In addition, as a measure to improve the PMV value, we examined the effect of adding a wind velocity in summer and increasing the temperature in winter.