Intermittent Flow Pattern on Two Phase Flow Boiling with Horizontal Microchannel

Abstract

Industrial equipment products had been developed for a small and compact design. Cooling system is also developed to mini heat exchanger with microchannel as main component. The main study is to find the characteristic of flow pattern and heat transfer effect in microchannel. The experiment has been done with visual apparatus that placed after outlet of test section with inner diameter 0.5 mm. The working fluids used is a natural refrigerant (propane) that operated on a vary parameter of experiment condition i.e. saturation temperature, mass flux and heat flux. Mapping of flow pattern used Wang's Map. The result experiment reported intermittent flow pattern occurred along operated experiment. Heat transfer showed increasing value on initial occurred two phase. The observation to visual data has reported as additional of experiment analysis.

Flow Pattern of Two-phase Flow Boiling with Heat Transfer and Pressure Drop Using Natural Refrigerant (Propane) in Microchannel

“…The comparison of visualisation in sight glass with Wang map showed the same flow pattern. The figure below has been referred on the conference of quality in research 24) . 25) found data experiment from their research by inner diameter 0.8 mm with CO2 as working fluids.…”

Effect of Wall Resistance on the Total Thermal Resistance of a Stacked Microchannel Heat Sink

“…Since a microchannel is too small for channel geometry complexity compared to a minichannel, for very high heat dissipation in compact systems two-phase flow has been considered 18,19,20) . The establishment of reliable and accurate heat transfer coefficient has yet to be established for newer and more environmentally friendly refrigerants even for minichannels such as R-22, R134A, R744 21) , R410A, R407C 22) , R717 23) and R290 24,25) . A schematic of the water-cooled MCHS considered here is shown in Fig.…”

Numerical and Experimental Study of Flow Behaviours in Porous Structure of Aluminium Metal Foam

“…Due to the randomness and interconnected ligaments of the metal foam, the complicated flow behaviours must be explained in a different light if necessary. The investigation of flow pattern have been done in small systems like microchannels 21) . Thus, understanding the overall flow patterns, e.g., velocity contours and streamlines would be helpful before jumping straight into modelling the interface region, exclusively for the open-cell metal foam.…”