thermal management – TechConnect Briefs

Increased Heat Transfer through Dropwise Condensation on a Bio-inspired Superhydrophobic-Hydrophilic Surface

Mondal B., Mac Giolla Eain M., Xu Q.F., Egan V., Punch J., Lyons A.M., City University of New York, US

Condensation of water vapor is an essential process in power generation, water collection, and thermal management. Because of the high surface energy of the metal surfaces, filmwise condensation of water vapor occurs, forming a static, [...]

Effect of CuO/water nanofluid in the enhancement of convective heat transfer for electronic cooling

Selvakumar P., Suresh S., National Institute of Technology, Tiruchirappalli, IN

In this work CuO nanoparticles are synthesized using sol gel technique and water based nano fluids of two different volume concentrations are prepared. Thermal conductivity and viscosity are measured. A copper heat sink having rectangular [...]

Thermal-managed sputtered micro machined gas chromatography columns for oilfield applications

Haudebourg R., Vial J., Thiébaut D., Sassiat P., Azzouz I., Danaie K., Bourlon B., Schlumberger, FR

Since the late 70s, new approaches have been proposed to replace conventional gas chromatograph apparatus by silicon based micro fabricated separation systems. The main challenge in miniaturized gas chromatography consists in the reproducible and collective [...]

Graphene Nanoplatelet Membranes for Aerospace Applications

Rawal S., Ravine J., Czerw R., Lockheed Martin Space Systems Company, US

Graphene nanoplatelets (GNP), conceptually described as unrolled carbon nanotubes, exhibit attractive properties including the highest thermal conductivity known and twice the surface area of carbon nanotubes. By blending with a minimal ratio of carbon nanotubes [...]

Cooling and Power Conversion using Nanometer Gaps

Tavkhelidze A., Cox I., Cool Chips plc, UK

Our nanotech answer to these basic industrial processes is not to make very small turbines or compressors, but instead to take advantage of the physics that occurs at very small sizes. In this case, instead [...]

Self-Heating Effects in GaN/AlGaN Heterostructure Field-Effect Transistors and Device Structure Optimization

Filippov K.A., Balandin A.A., University of California Riverside, US

In this paper we present results of our simulation of temperature rise in GaN/AlGaN HFETs characterized by different geometry, layered structure, doping density and substrate type. We do note make simplifying assumptions of the uniform [...]