Determination of Optimum Hot-Water Temperatures for PCM Radiant Floor-Heating Systems Based on the Wet Construction Method

Sustainability

Sanghoon Baek¹  Sangchul Kim² 

[1] Industry Academic Cooperation Foundation, Hankyong National University, 327, Jungang-ro, Anseong-si, Gyeonggi-do 17579, Korea;School of Architecture, Hankyong National University, 327, Jungang-ro, Anseong-si, Gyeonggi-do 17579, Korea;

关键词: PCM radiant floor-heating system;    wet construction method;    hot-water temperature;    apartment housing;   

DOI  :  10.3390/su10114004

来源: DOAJ

【 摘 要 】

Owing to use of mortar, which demonstrates low heat storage and discharge performance, conventional radiant floor-heating systems, based on the wet construction method and hot-water circulation, consume large amounts of energy. This study proposes a new type of radiant floor-heating system that is capable of reducing energy consumption via use of the latent heat of a phase change material (PCM), whereby the phase change, which occurs within, is induced by the thermal energy supplied by hot water. Simulation analyses revealed that hot-water supply temperatures, required to maintain the floor-surface and indoor-air temperatures at the set point using PCM latent heat, were in the range 40⁻41 °C. At supply water temperatures measuring less than 39 °C or exceeding 42 °C, the latent-heat effect of the phase change of the PCM tended to fail, and the corresponding floor-surface temperature assumed a value different from that corresponding to the set point. By contrast, supply temperatures in the range 40⁻41 °C resulted in return temperatures measuring approximately 27.4⁻27.5 °C, which in turn corresponded to an indoor air temperature of 21.6⁻22.6 °C that was stably maintained within ±0.6 °C of the 22 °C set-point temperature.

【 授权许可】

Unknown