Performance Evaluation of the Louver-type Double-skin Facade System using PCM Film for Cooling Energy Reduction

Abstract

Purpose: There are problems with the construction method for liquid-type phase change materials (PCMs), and with the load generated in the melting process. The PCM film is thus used as a solution for enhancing stability and workability, reducing indoor cooling energy and PCM film installability. In this study, film applicability is considered; we propose a louver-type double skin system using PCM film, evaluate its performance in comparison with existing liquid-type PCMs, and confirm the installability of PCM film and the cooling energy reduction effect. Method: A total of four types of experimental bodies were manufactured for comparative analysis of thermal performance and temperature change. The experimental period was 4 days a week, the actual data measurement was performed every 12 h during the night and daytime, the results were compared and analyzed graphically, and the possibility of installing a louver-type double-hull system using PCM film was verified. The cooling energy reduction effect was also confirmed. Result: Although the liquid-type PCM had the best performance, its practical use in building materials was evaluated based on workability and stability. On the other hand, the performance of the PCM film was 11.66% lower than that of the liquid PCM, which was determined to be high. There will be need for further work on deriving the melting temperature using an appropriate PCM film, and controlling the sensible and latent heat effects to satisfy both the cooling and the heating effects.