Journal
THERMOCHIMICA ACTA
Volume 663, Issue -, Pages 77-84Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.tca.2018.03.014
Keywords
Phase change; Thermal energy storage; Stearyl alcohol; Stearic acid; Graphite; Thermal conductivity
Funding
- South African Research Chairs Initiative of the Department of Science and Technology
- National Research Foundation (NRF) of South Africa [97994]
- African Laser Centre (ALC) of the University of Pretoria
- Energy Institutional Research Theme of the University of Pretoria
Ask authors/readers for more resources
Mixtures of stearyl alcohol with palm triple pressed acid (essentially a mixture of palmitic and stearic acid derived from palm oil) were prepared and characterized to assess their phase change thermal energy storage utility. Unlike the other mixtures, the 35 mol% stearyl alcohol mixture showed a single crystallization exotherm peak, albeit with a small shoulder, in differential scanning calorimetry. The enthalpy associated with this phase change was 158 +/- 5 kJ kg(-1) and the crystallization peak temperature was 46 degrees C. Inclusion of 10 wt.% graphite nanoplatelets increased the solid state and melt state thermal conductivities by factors of approximately six and twelve respectively. This nanocomposite showed no deterioration in thermal properties after hundred heating and cooling cycles between the end-temperatures of 30 degrees C and 60 degrees C when scanned at a rate of 10 degrees C min(-1). There was also no evidence of graphite platelet sedimentation in the molten liquid after two months at 80 degrees C.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available