Thermal characteristics of expanded perlite/paraffin composite phase change material with enhanced thermal conductivity using carbon nanotubes     
Yazarlar (4)
Ali Karaipekli
Çankırı Karatekin Üniversitesi, Türkiye
Doç. Dr. Alper BİÇER Tokat Gaziosmanpaşa Üniversitesi, Türkiye
Ahmet Sarı
Karadeniz Teknik Üniversitesi, Türkiye
Vineet Veertyagi
Shri Mata Vaishno Devi University, Hindistan
Makale Türü Özgün Makale
Makale Alt Türü SSCI, AHCI, SCI, SCI-Exp dergilerinde yayınlanan tam makale
Dergi Adı Energy Conversion and Management
Dergi ISSN 0196-8904 Wos Dergi Scopus Dergi
Dergi Tarandığı Indeksler SCI-Expanded
Dergi Grubu Q4
Makale Dili İngilizce
Basım Tarihi 02-2017
Cilt No 134
Sayı 1
Sayfalar 373 / 381
DOI Numarası 10.1016/j.enconman.2016.12.053
Makale Linki http://linkinghub.elsevier.com/retrieve/pii/S0196890416311268
Özet
Paraffins constitute a class of solid-liquid organic phase change materials (PCMs). However, low thermal conductivity limits their feasibility in thermal energy storage (TES) applications. Carbon nano tubes (CNTs) are one of the best materials to increase the thermal conductivity of paraffins. In this regard, the present study is focus on the preparation, characterization, and improvement of thermal conductivity using CNTs as well as determination of TES properties of expanded perlite (ExP)/n-eicosane (C20) composite as a novel type of form-stable composite PCM (F-SCPCM). It was found that the ExP could retain C20 at weight fraction of 60% without leakage. The SEM and FTIR analyses were carried out to characterize the microstructure and chemical properties of the composite PCM. The TES properties of the prepared F-SCPCM were determined using DSC and TG analyses. The analysis results showed that the components of the composite are in good compatibleness and C20 used as PCM are well-infiltrated into the structure of ExP/CNTs matrix. The DSC analysis indicated that the ExP/C20/CNTs (1 wt%) composite has a melting point of 36.12 °C and latent heat of 157.43 J/g. The TG analysis indicated that the F-SCPCM has better thermal durability compared with pure C20 and also it has good long term-TES reliability. In addition, the effects of CNTs on the thermal conductivity of the composite PCM were investigated. Compared to ExP/C20 composite, the use of CNTs has apparent improving effect for the thermal conductivity without considerably affecting the compatibility of components, TES properties, and thermal stability.
Anahtar Kelimeler
Carbon nanotubes | Composite PCM | Expanded perlite | n-Eicosane (C20) | Thermal conductivity | Thermal energy storage