Temperature dependence of thermophysical and rheological properties of seven vegetable oils in view of their use as heat transfer fluids in concentrated solar plants

Hoffmann Jean-François, Vaitilingom Gilles, Henry J.F., Chirtoc M., Olives R., Goetz V., Py X.. 2018. Temperature dependence of thermophysical and rheological properties of seven vegetable oils in view of their use as heat transfer fluids in concentrated solar plants. Solar Energy Materials and Solar Cells, 178 : 129-138.

Quartile : Q1, Sujet : ENERGY & FUELS / Quartile : Q1, Sujet : PHYSICS, APPLIED / Quartile : Q1, Sujet : MATERIALS SCIENCE, MULTIDISCIPLINARY

Résumé : Selecting a heat transfer fluid (HTF) depends on the value of thermophysical parameters. In response to the need for innovative heat transfer fluids in concentrated solar power (CSP) plants, vegetable oil offers a promising solution. The relevant thermophysical properties are density, thermal conductivity and specific heat capacity. Moreover, a rheological property, the dynamic viscosity is also relevant. The objective of this work was to study and compare these properties for seven different vegetable oils (rapeseed, soybean, sunflower, palm, copra, cotton and jatropha) in the temperature range from ambient to 250 °C. For all the properties studied, the values evolved with increasing temperature and were influenced by the fatty acid composition of each vegetable oil. Experimental results are compared with those in the literature and are found to be consistent. The temperature dependencies are correlated to temperature using polynomial equations. The correlations presented here may be useful as a database for the selection of innovative heat transfer fluids.

Mots-clés géographiques Agrovoc : France, Burkina Faso

Mots-clés libres : Vegetable oils, Thermophysical properties, Thermal conductivity, Specific heat capacity, Dynamic viscosity, Heat transfer fluid

Classification Agris : Q60 - Traitement des produits agricoles non alimentaires
P06 - Sources d'énergie renouvelable

Champ stratégique Cirad : Axe 2 (2014-2018) - Valorisation de la biomasse

Auteurs et affiliations

• Hoffmann Jean-François, Université de Perpignan (FRA)
• Vaitilingom Gilles, CIRAD-PERSYST-UPR BioWooEB (FRA)
• Henry J.F., URCA (FRA)
• Chirtoc M., URCA (FRA)
• Olives R., Université de Perpignan (FRA)
• Goetz V., CNRS (FRA) - auteur correspondant
• Py X., Université de Perpignan (FRA)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/588467/)

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