Investigation of thermal properties and enhanced energy storage/release performance of silica fume/myristic acid composite doped with carbon nanotubes     
Yazarlar (5)
Ahmet Sarı
Karadeniz Teknik Üniversitesi, Türkiye
Amir Al-Ahmed
King Fahd University Of Petroleum And Minerals, Suudi Arabistan
Doç. Dr. Alper BİÇER Tokat Gaziosmanpaşa Üniversitesi, Türkiye
Fahad A Al-Sulaiman
King Fahd University Of Petroleum And Minerals, Suudi Arabistan
Gökhan Hekimoğlu
Karadeniz Teknik Üniversitesi, Türkiye
Makale Türü Özgün Makale
Makale Alt Türü SSCI, AHCI, SCI, SCI-Exp dergilerinde yayınlanan tam makale
Dergi Adı Renewable Energy
Dergi ISSN 0960-1481 Wos Dergi Scopus Dergi
Dergi Tarandığı Indeksler SCI-Expanded
Makale Dili İngilizce
Basım Tarihi 09-2019
Cilt No 140
Sayı 1
Sayfalar 779 / 788
DOI Numarası 10.1016/j.renene.2019.03.102
Makale Linki https://linkinghub.elsevier.com/retrieve/pii/S0960148119304148
Özet
Myristic acid (MA) with a melting temperature around 54 °C has huge prospects for solar passive thermal energy storage applications. However, like all other fatty acids (FA), it is also suffers from issues like leakage and low thermal conductivity (TC), when considered for latent heat thermal energy storage (LHTES) applications. Here, to overcome the seepage problem, MA was incorporated within the silica fume (SF) using simple direct impregnation method. To deal with the TC issue, prepared SF/MA pre-composite was doped with carbon nanotubes (CNTs) at three different weight percentage (0.3, 0.5 and 1.0 wt%) and eventually enhanced its TC by about 9.4%, 21.9% and 43.8%, respectively. The chemical and morphological structures of the SF/MA/CNTs developed as novel shape-stabilized composite PCMs (SS-CPCMs) were evaluated by FTIR, XRD, SEM and DSC analysis. The heat storage capacities of the doped and undoped SS-CPCMs were found in the range of about 87–91 J/g with good thermal stability up to 190 °C. Long standing-thermal cycling study was performed with the selected SS-CPCM doped with CNTs (1.0 wt%). No visible degradation or chemical changes were observed even after 1000 thermal cycles. CNTs doping significantly improved the heating and cooling performance of SF/MA composite.
Anahtar Kelimeler
Composite PCM | Myristic acid | Silica fume | Thermal conductivity | Thermal energy storage