Abstract
Phase change materials (PCMs) can be used for thermal energy storage and temperature regulation during phase change, and have broad application prospects in energy-efficient use and energy saving. The compatibility between traditional phase change materials and building materials is too bad to combine in building energy conservation. Therefore, the new phase change materials have become a research focus in the field of phase change energy storage in buildings. In the paper, the research progress of phase change materials in recent years and the optimization and application of passive building energy-saving are reviewed.
Highlights
1 Introduction paper, the characteristics and the application of Phase change materials (PCMs) in active building energy efficiency were reviewed
Phase-change energy storage technology is based on PCMs for energy conversion and storage to cut down the energy demand during peak times
The results show that to improve the thermal comfort of the interior, the PCM is preferably placed in the middle of the outer wall
Summary
New organic composites in building PCMs draw attention currently. Zhang [9] prepared a composite PCM of sodium acetate and area and compared the positions of different PCMs in the external wall insulation based on the integrated discomfort level. The researchers built the test house after adding the PCM to the wall material of the test house through the encapsulation technique, proving that the material is effective in reducing the energy consumption of the building. The experimental study showed that this double-layer PCM increased the satisfaction of indoor thermal comfort conditions from 73% to 93% in a dry climate and from 63% to 75% in a semiarid climate. The energy consumption for heating was reduced by 17.5% in a dry climate and 10.4% in the semiarid climate. Zhang et al [12] designed a solar heating system with a phase change thermal storage tank, and experiments show that the system can keep the indoor temperature above 20 °C under the minimum -10 °C outdoor conditions.
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