نتایج جستجو برای: finned tube
تعداد نتایج: 97473 فیلتر نتایج به سال:
Friction Loss and Heat Transfer Coefficient in Finned Tube Heat Exchangers for Reheating Massecuites
Equations developed for packed columns may be used to predict the overall heat transfer coefficient and friction loss in massecuite reheaters. The results seem to indicate that exchangers with the tubes staggered give higher heat transfer rates than those with the tubes in line.
The objectives of this study are to provide experimental data and a correlation that can be used in the optimal design of an evaporator under frost conditions. In the present study, we tested both a single stage and a two-stage evaporator with a variation of operating parameters and fin geometry under frost conditions. The effects of tube space and fin alignment on the heat transfer performance...
Heat exchangers are some of the most important parts in thermoacoustic devices. In an oscillatory flow condition, the flow and temperature fields around the heat exchangers can be quite complex and it may significantly affect their heat transfer behaviour. As a result, one cannot directly apply the heat transfer correlations for a steady flow to the design of heat exchangers operating in oscill...
Electroreception is an ancient subdivision of the lateral line sensory system, found in all major vertebrate groups (though lost in frogs, amniotes and most ray-finned fishes). Electroreception is mediated by 'hair cells' in ampullary organs, distributed in fields flanking lines of mechanosensory hair cell-containing neuromasts that detect local water movement. Neuromasts, and afferent neurons ...
During cross flow in a heat exchanger, heat transfer in the front portion of the tube is more compared to back portion of the tube. This is due to less formation of vortices at the backside of the tube. For uniform heat transfer to take place throughout the tube, it is necessary to increase the vortex formation at the rear side of the tube. The aim of this study is to explore the possibilities ...
In this study, the effects of thermal and hydraulic characteristics of wavy fin and tube heat exchanger are investigated. Simulation has been carried out by a commercial computational fluid dynamics code, ANSYS CFX12.0. The main objective of this study is to investigate the flow characteristics in turbulent flow. Results are predicted for the turbulent flow regime (2100≤Re≤7000) and compared wi...
This paper outlines a mathematical modelling approach to predict the steady-state behaviour of finned-coil evaporators. The model was built taking three domains into account: (i) refrigerant flow inside the coil; (ii) heat transfer through the walls; and (iii) air flow through the finned-coil array. The equations were obtained from the mass, momentum and energy conservation principles, mathemat...
Ray-finned fishes (Actinopterygii) represent more than 50 % of extant vertebrates and are of great evolutionary, ecologic and economic significance, but they are relatively underrepresented in 'omics studies. Increased availability of transcriptome data for these species will allow researchers to better understand changes in gene expression, and to carry out functional analyses. An internationa...
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