Pool Boiling of HFE 7200–C4H4F6O Mixture on Hybrid Micro-Nanostructured Surface

Abstract

Steadily increasing heat dissipation in electronic devices has generated renewed interest in direct immersion cooling. The ideal heat transfer fluid for direct immersion cooling applications should be chemically and thermally stable, and compatible with the electronic components. These constraints have led to the use of Novec fluids and fluroinerts as coolants. Although these fluids are chemically stable and have low dielectric constants, they are plagued by poor thermal properties like low thermal conductivity (about twice that of air) and low specific heat (same as that of air). These factors necessitate the development of new heat transfer fluids with improved heat transfer properties and applicability. C4H4F6O is a new heat transfer fluid which has been identified using computer-aided molecular design (CAMD) and knowledge-based approaches. A mixture of Novec fluid (HFE 7200) with C4H4F6O is evaluated in this study. Pool boiling experiments are performed at saturated condition on a 10 mm × 10 mm silicon test chip with CuO nanostructures on a microgrooved surface, to investigate the thermal performance of this new fluid mixture. The mixture increased the critical heat flux moderately by 8.4% over pure HFE 7200. Additional investigation is necessary before C4H4F6O can be considered for immersion cooling applications.

Pool boiling of Novec 7300 and self-rewetting fluids on electrically-assisted supersonically solution-blown, copper-plated nanofibers

“…In addition to that, owing to their chemical inertness, unlike other fluids, FC fluids pose no harm for the microelectronics characteristics. Pool boiling of several fluorinerts, Novec fluids and other dielectric fluids have been reported earlier on different surfaces and in several mixtures [23][24][25][26]. As these fluorinerts and Novec fluids are used in direct liquid cooling of the electronic components, pool boiling study of these fluids is essential.…”

Pool boiling of Novec 7300 and DI water on nano-textured heater covered with supersonically-blown or electrospun polymer nanofibers

“…Heat removal in pool boiling significantly depends on the coolants used, and such coolants as DI water, alcohols, Fluorinert fluids and fluid mixtures were explored [31][32][33][34][35][36][37][38]. Suspensions of nanoparticles [39][40][41] or surfactant solutions [42] were also used as coolants aiming to shift the CHF to a higher value.…”

Experimental study of nucleate pool boiling heat transfer of self‐rewetting solution by surface functionalization with TiO2 nanostructure

“…Organic and inorganic phase change materials have obtained extensive attention in recent years due to their higher latent heat, suitable phase‐transition temperature, and stable physical and chemical properties . The use of newly developed materials or structures combined with pool boiling to increase heat transfer developing, and nano‐surface can significantly improve the boiling heat transfer effect . Different oxide materials such as as alumina, titania, silica, zinc oxide and CuO have been used as a functional surface of the coating .…”