Experiments and CFD-PBM simulation were performed in this study to investigate the effects of helically-finned tube (HFT) internals on gas-liquid flow a laboratory-scale bubble column. Hydrodynamic parameters, including gas holdup, size field as well turbulence properties, compared for an empty column other two columns with bare-tube (BT) or HFT internals. We found that bare rods promote stabil...

Amongst the wide range of metal foam applications, the heat exchange industry is the most notable. Heat exchangers are devices that transfer heat from one medium to another that in most cases the two media are air and water. Specifically, aircooled heat exchangers consist of a number of water tubes to transfer the heat between the pumped air and the flowing water through the tubes. Covering the...

Ambient air vaporizers, depending on their efficiency, can be up to several meters high. Therefore, they have a large outside surface area exposed the wind. Forced flow through vaporizer structure beneficial effect improving heat transfer from environment. On other hand, if is placed in region of significant wind velocities, forces acting considerable. This paper presents CFD analysis ambient w...

The influence of the improvement finned tube radiator unit structure on fluid flow and heat transfer effect locomotive was studied. A saw-toothed fin with aluminum instead copper proposed to keep position size flat hot water pipe unchanged. CFD simulation analysis carried out by ICEPAK17.0, under conditions an ambient temperature 24.6 °C, atmospheric pressure 85,040 Pa air density ? = 0.94 kg/m...

Due to the use of welded finned tubes in heat exchangers, gas blocks are characterized by very good electric energy production performance, and their reliability can reach 98%. Finned used exchangers usually welded. Such should be characterised following properties: high thermal resistance high-temperature corrosion a flue atmosphere, appropriate joint strength hardness. The most popular techno...