Abstract
This study conducted a comparative experiment of PCM melting temperature using a chamber for the purpose of providing basic data, to apply PCM to an underfloor radiant heating system. The underfloor radiant heating system in the chamber applied the standard floor structure of the apartment building, and the changes in indoor temperature and floor surface temperature were compared when none-PCM, 44℃, 35℃, and 28℃ PCM were applied to the lower part of the heating pipe. As a result of the experiment, the time required to reach the maximum temperature after operating the boiler at the indoor air temperature, was the fastest when PCM was not applied. And in the case of the floor surface temperature, the time to reach the maximum temperature was the fastest at 28℃ PCM. However, the time to reach the minimum temperature after the boiler stop, that is, the time to maintain heat, was the longest for indoor as well as floor surface temperatures, when 35℃ PCM was applied.
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