Abstract
PMV control system was applied for a ceiling radiation cooling/heating system utilizing groundwater as heat source/sink. One of our main aims is to develop an equipment system and control method that make it possible to maintain a comfortable indoor thermal environment by circulating cold water cooled by heat exchange with groundwater without the need to use a heat pump in summer. The subject tests on thermoregulatory behavior was carried out in the summer of 2016. This paper presents the results of research about summer target figure for PMV of a ceiling radiation cooling system using groundwater including the power consumption of the electric fan and air-conditioner based on thermoregulatory behaviors.