Passive Downward Heat Transfer in Reverse Thermosyphon Enabled Bubble Pump with Two Working Media for U-Tube Solar Thermal Collector

The study is aimed to evaluate the impact of multi-phase nanofluid flow enhance heat transfer. effect liquid medium and pumping together with enabling a bubble pump reverse thermosyphon arranged as an extension U-tube solar thermal collector could affect passive downward transfer numerically. selection were based on different phase change material accomplishment respect their optimal concentrations, geometry compared. occurrence dry out limit expansion boiling phenomena identified by experimental work. amount in was adjudged resistance, temperature between evaporator condenser, fill ratio, tilt angle, coefficient, efficiency, etc. In this paper, effects major control parameters performance energy are discussed.
 HIGHLIGHTS
 
 Continuous operation 2 working media, using source finned for feasible
 CFD model 2-D considering has successfully reproduced both characteristics fluid transfer
 Optimal efficiency
 Reduced rate loss, increased storage integrating PCM directly inside U-tube, enhanced incorporating high capacity realized
 Suitable media vital contributed improved system efficiency reduced operational cost
 GRAPHICAL ABSTRACT