Speaker
Description
A new approach to cooling systems proposes the use of the metal alloys characterized by high heat capacity and thermal conductivity compared to water. The application of liquid metal as a coolant in the nuclear power industry and in renewable energy sources, electronics devices, new cooling management system using electromagnetic pumps and Li-ion batteries, increases the efficiency and performance of such devices.
The biggest disadvantages of using liquid metal as a cooling system are cost and weight (the density of liquid metal is more than six times higher than that of water). However, liquid metals have the advantage of excellent heat extraction and spreading capability, which leads to more effective work and a reduction in the coolant charge.
This work is on the development of heat transfer fluids to extend the working temperature range and reduce the melting point (to reduce heat tracing requirements) simultaneously with a high boiling temperature to allow efficient thermodynamic cycles. The coolant should also be characterized by high thermal conductivity, which is desired for efficient heat transfer, low viscosity, which is beneficial for pressure drop and pumping power, and a high heat capacity, which would allow for direct thermal storage and improve safety (toxicity) and corrosion behavior. The Ga-Sn-Zn based alloys meet the best of the above requirements.
However, a lack of understanding of their thermophysical properties limits potential applications of these alloys. This study presents the results of the basic thermophysical structure-sensitive properties (density, surface tension, viscosity, electrical conductivity, thermoelectric power and thermal conductivity) for the ternary Ga-Sn-Zn alloy with different admixtures (Al, Bi, In, Li, Na, Pb) that have a significant effect on the properties of this basic eutectic.
| Speaker Country | Ukraine |
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