Thermal performance of phase change material energy storage floor for active solar water-heating system |
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Authors: | Ruolang Zeng Xin Wang Wei Xiao Yinping Zhang Qunli Zhang and Hongfa Di |
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Affiliation: | (1) School of Chemistry and Biological Engineering, Changsha University of Science &; Technology, Changsha, 410004, People’s Republic of China;(2) Materials &; Thermochemistry Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, People’s Republic of China |
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Abstract: | The conventional active solar water-heating floor system contains a big water tank to store energy in the day time for heating
at night, which takes much building space and is very heavy. In order to reduce the water tank volume or even cancel the tank,
a novel structure of an integrated water pipe floor heating system using shapestabilized phase change materials (SSPCM) for
thermal energy storage was developed and experimentally studied in this paper. The thermal performances of the floors with
and without the SSPCM were compared under the intermittent heating condition. The results show that the Energy Storage Ratio
(ESR) of the SSPCM floor is much higher than that of the non-SSPCM floor; the SSPCM floor heating system can provide stable
heat flux and prevent a large attenuation of the floor surface temperature. Also, the SSPCM floor heating system dampens the
indoor temperature swing by about 50% and increases the minimum indoor air temperature by 2°C–3°C under experimental conditions.
The SSPCM floor heating system has a potential of making use of the daytime solar energy for heating at night efficiently. |
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