Flow Boiling of R1336mzz(Z) in Tapered Microgaps with Asymmetric Dual-V Microchannels

• DOI: 10.2139/ssrn.4313656
• Publication Date: 2022-12-29T13:08:34Z
• Authors: Debora Carneiro M...; Valter Salles do ...; Gherhardt Ribatski; Satish G. Kandlikar
• Keywords: Working fluid

The development of high heat flux cooling technologies has attracted great interest investigations during the last decades, since number applications that require removal loads from restricted spaces continuously to grows. This demand motivated a series regarding flow boiling in microchannels, which provides capability with low temperature gradients. In recent investigation, new sinks composed bottom surface milled asymmetric Dual-V microchannels combined tapered microgap were presented, and occurrence inversion was documented for first time experiments using water as working fluid. It is noteworthy, however, despite its thermal properties use fluid may not meet some requirements, refrigerants necessary. addition, increasing concerns environmental impacts, novel global warming null ozone depleting potentials have been presented market, but often limited results are literature their performances. Hence, present work Hydro-Fluoroolefin R1336mzz(Z) (null ODP GWP = 2) copper containing plain manifold conducted, it observed if proposed geometry effective improving performance this refrigerant. Tests conducted three different surfaces, saturation equal 41°C inlet mass fluxes varied 400 1000 kg/m2s. Effects various parameters evaluated put context patterns high-speed camera. best promoted dissipation up 93 W/cm2 without reaching CHF, wall lower than 74 °C, pressure drop 10 kPa, maximum transfer coefficient 22 kW/m2K.