Isıl Enerji Depolama Amaçlı Yapıca Kararlı Yeni Bir Faz Değişim Malzemesi Olarak Silikafume/Laurik Asit (LA) Kompoziti

Abstract

This paper is aimed to prepare, characterize, and determine thermal energy storage properties of silicafume/lauric acid(LA) composite as a novel formstable composite phase changematerial(PCM). The composite PCM was prepared by incorporating LA in the silicafume by using vacuum impregnation method. The LA could be retained by 30 wt% into the silicafume without the leakage of melted LA from the composite. The composite PCM was characterized by using SEM and FT-IR analysis techniques. Thermal energy storage properties of the composite PCMs were determined by DSC analysis. DSC results showed that the melting temperature and latent heat of the composite PCMs are 43.19 o C and 73.14 J/g, respectively. Thermal cycling test was conducted to determine the thermal reliability of the composite PCM and the results showed that the composite PCM had good thermal energy storage reliability and chemical stability. TG analysis revealed that the impregnated LA into the silicafume had good thermal stability. Thermal conductivity of the composite PCM was improved by adding carbon nanotubes (CNTs) in different mass fractions. The effect of CNTs addition on the thermal energy storage/release times of the produced composite PCM was also tested.