Thermal properties and heat storage analysis of palmitic acid-TiO2 composite as nano-enhanced organic phase change material (NEOPCM). (25th April 2016)

• Record Type: Journal Article
• Authors: Sharma, R.K.; Ganesan, P.; Tyagi, V.V.; Metselaar, H.S.C.; Sandaran, S.C.
• Is Part Of: Applied thermal engineering. Volume 99(2016:Apr.)
• Page Start: 1254
• Page End: 1262
• Publication Date: 2016-04-25
• Subjects: Palmitic acid -- Nano-TiO2 -- Thermal analysis -- Nano-enhanced organic phase change material -- Thermal energy storage -- Thermal conductivity; Heat engineering -- Periodicals; Heating -- Equipment and supplies -- Periodicals; Periodicals; 621.40205
• DOI: 10.1016/j.applthermaleng.2016.01.130
• Languages: English
• ISSNs: 1359-4311

Abstract

Highlights: Novel composite of palmitic acid and TiO2 nanoparticles with enhanced thermal energy storage capabilities The composite is thermally reliable and chemically stable. Thermal conductivity of the composite increases significantly with the loading. Graphical Abstract: Abstract: In the present study, the phase change behavior of prepared novel composites of palmitic acid and solid nanoparticles of titanium dioxide (TiO2 ) for thermal energy storage has been investigated. The nanoparticles are dispersed into the base fluid in various mass fractions (0.5, 1, 3, and 5%), and their effects on the thermo-physical properties have been investigated. Structural analysis has been carried out by using FESEM, and crystallography was checked by XRD technique. The chemical/functional groups of the base fluid and composite PCMs have been analyzed by using FT-IR spectrum. The observations showed that the TiO2 nanoparticles do not affect the chemical structure of palmitic acid; however they improve the chemical stability. The phase transition temperature and latent heat of fusion has shown the significant stability with the increase in nanoparticle weight fractions. The accelerated thermal cycle test of the composite shows good thermal reliability for 1500 melt/freeze cycles. Thermal conductivity of palmitic acid increased gradually by 12.7, 20.6, 46.6, and 80% for the nanoparticle weight fractions of 0.5, 1, 3, and 5% respectively. Based on the results, it can be mentioned that the prepared palmitic acid based nano-enhanced organic phase change composite materials can be very well used as potential solar thermal energy storage materials.