curved tubevisualizationsecondary flowIn the present study, the two-phase heat transfer coefficient characteristics of HFC-134a, evaporating inside a plate fin-and-tube evaporator with plain fin geometry, are experimentally investigated. The experimental apparatus consists essentially of a well modified ...
Deteriorated heat transfer (DHT), or heat transfer deterioration (HTD), is characterized by the rapid increase in the wall temperature or the drop in the heat transfer coefficient compared to normal heat transfer. From: Applied Thermal Engineering, 2018 ...
The objective of this experimental study is to evaluate the heat transfer coefficient outside a tube with annular transverse fins, derived from strips of copper mechanically bound and coupled outside. Water is used as the heating medium, in turbulent conditions and flowing at different temperatures ...
Overall heat transfer coefficientHorizontal-tube falling filmDesalinationIn this paper, two sets of experimental devices have been established for studying the falling film evaporation outside a horizontal tube and condensation inside a horizontal tube, with three different tube arrangements and seawater as...
Tube digestionHeat transfer coefficientPrediction modelScaleBased on the actual production data of gibbsite refinery in Vietnam, prediction model of heat transfer coefficient is established due to the mechanism of heat transfer, which is validated by actual production data. The results show that the ...
Re: Heat Transfer Coefficient #5 Alberto Schroth Guest Posts: n/a In my problem, my geometry is a closed tube with an inlet boundary condition described by an UDF which varies the velocity as a function time (sin[wt]). All the walls are adiabatic except for the end of the tube which...
Advantages: high heat transfer coefficient, compact structure and detachable structure. Disadvantages: small processing capacity, low operating pressure, less than 1.5 Mpa, operating temperature can not be too high. 3. Fin Heat Exchanger (1) Finned-tube heat exchanger ...
Study on the overall heat transfer coefficient for the tube-in-tube heat exchanger used in mixed-gases coolers. Adv Cryogenic Eng 2002;47B:1483-90.M.Q. Gong, J.F. Wu, E.C. Luo, Y.F. Qi, Q.G. Hu, Y. Zhou, Study on the overall heat transfer coefficient for the tube-in-tube ...
The paper presents a research on the heat-transfer coefficient at the surface of a sprinkled tube bundle, using a boiling simulation. A tube bundle consists of thirteen copper tubes divided into two rows and it is located in a low-pressure chamber where vacuum is generated by an exhauster vi...
At a constant Reynolds number, the relative J factor (ratio of heat transfer coefficient to friction factor, relative to smooth tube values), had values from 0.93 to 1.16, with four dimpled tube configurations having values larger than unity. Despite the extremely simple design, this outperforms...