科研之友
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摘要
The large energy consumption of the building sector is mainly resourcing to active systems for cooling and heating of indoor spaces. According this, the external envelopes of offices and commercial buildings are systematically composed by large glazed areas that lead to high energy losses in the winter and large solar gains in summer. The incorporation of phase change materials into building elements is a growing trend for improving the thermal energy storage capacity in the latent form and the thermal inertia. Thermal Energy Storage systems (TES), using phase change materials (PCM) in buildings, are widely investigated technologies and a fast developing research area. Therefore, there is a lack of publish research reviews on PCM solutions applied into glazed areas. This review focuses on PCM technologies developed for the translucent and transparent building envelope, such as windows, shutters and other shading devices. This review gives special attention to describe and to discuss the thermal properties, the energy storage and the saving potentials of innovative PCM solutions and presents the main results of research carried out on this domain. The most used strategy to apply the PCM into these building elements is the direct incorporation using macro capsules containers (composed by different materials). The main conclusions taken from the research studies on prototype solutions show the PCM potential to enhance the thermal performance of buildings through the glazing and shading devices. This studies show that the PCM technology applied to the glazed areas of the building envelope can significantly improve the energy efficiency, and with the reduction of the product costs this technology will appear soon into the typical building construction systems.
