New Additive Type Amorphous-Carbon/Zn Modifier of the Thermal Conductivity of Alcohol Fuel

Abstract

A functional inorganic-additive modifier of the thermal conductivity of biofuel type alcohol anhydrous was developed based on an amorphous carbon nanocomposite containing dispersed zinc. Dispersion and modification of thermal conductivity in biofuels type anydrous alcohol were considered, as well as in petro-diesel and a blend of biodiesel and petro-diesel. Fuels, alcohol, diesel and biodiesel acted as a continuous medium dispersing the particles of C/Zn. Both thermal conductivity and thermal resistivity measurements were carried out showing that the amorphous nanocomposite particles C/Zn act as an additive to improve the thermal conductivity of alcohol. The same phenomenon has not been identified for diesel, biodiesel and its blends. Increasing the thermal conductivity of the alcohol generated by adding of particles is discussed as a function of the concentration and molecular interactions on the surface of additive particles.

Graphite Dispersions as a Basis for Development of High Thermal Conductivity Fluids

“…Suspensions were kept under constant sonication during 30 minutes, for better dispersion and homogenization [4.5]. The thermal resistivity and conductivity of fluids and particle suspensions were measured using a thermal properties analyzer KD2 PRO DECAGON DEVICES, which has an accuracy of about ± 0,01WmK [4]. This equipment uses the transient hot wire method, being a direct and fast method of thermal conductivity of materials.…”

“…To enhance the thermal conductivity simple idea of dispersion of solid particles in conventional refrigerants has been applied, based on Maxwell's studies, which carried out several investigations in systems of this type [1]. The previous approach is justified in a theoretical way, since solids are better conductors of heat that liquids [4]. In this sense, this work investigate the effect of addition of graphite particles on the thermal conductivity of conventional fluids, such as mineral oil, ethylene glycol, glycerin distilled and liquid Vaseline using sonication to disperse particles.…”