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Wednesday, July 15, 2020 | History

2 edition of investigation of a high steam velocity heat transfer apparatus ... found in the catalog.

investigation of a high steam velocity heat transfer apparatus ...

John Hastings Tweet

investigation of a high steam velocity heat transfer apparatus ...

by John Hastings Tweet

  • 115 Want to read
  • 30 Currently reading

Published .
Written in English

    Subjects:
  • Steam engineering.

  • Edition Notes

    Other titlesHigh steam velocity heat transfer apparatus, An investigation of.
    The Physical Object
    Pagination[4], 68 leaves,
    Number of Pages68
    ID Numbers
    Open LibraryOL16798998M

    Air Heater or Air Preheaters - An air heater or air preheater is a heat transfer apparatus through which combustion air is passed and heated by a medium of higher temperature, such as the products of combustion, steam or other fluid. Arch - An arch is the flat or sloped portion of the heater radiant section opposite the floor. Fernandez-Seara [8, 9] designed and built an experimental lab-scale apparatus to analyze the heat transfer coefficients using the Wilson plot method, where the Wilson plot method is a remarkable.

    A major parameter for evaluating heat transfer coefficients is the Nusselt number, Nu ¼ hD h=k c ð1Þ where h is the convective heat transfer coefficient defined as h ¼ k [email protected] @*n T 0jet T wall ð2Þ where @T/@n gives the temperature gradient component normal to the wall. The selection of Nusselt number to measure the heat transfer. HEAT TRANSFER. The rate at which heat is transmitted from a hot gas to a cooler metal surface over which the gas is flowing has been the subject of a great deal of investigation both from the experimental and theoretical side. A more or less complete explanation of this process is necessary for a detailed analysis of the performance of steam.

    DESCRIPTION OF APPARATUS A. Heat-Transfer Apparatus A schematic diagram of the heat-transfer apparatus used is shown in Figure 1. This apparatus consists of two cycles a process water cycle and a steam cycle. In the process water recycle system, water from a 55 gallon. @article{osti_, title = {Physical principles of heat pipes}, author = {Ivanovski, M N and Sorokin, V P and Yagodkin, I V}, abstractNote = {Heat pipes are used whenever high rates of heat transfer or the control or conversion of heat flows are required. This book covers the physical principles of operation of heat pipes and choice of working fluid related to temperature range.


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Investigation of a high steam velocity heat transfer apparatus .. by John Hastings Tweet Download PDF EPUB FB2

A heat transfer experiment was performed on steam-water two-phase flow in an annular flow path with a uniformly heated rod under the conditions of the mass flow rates from heat fluxes below x 10 5 W /m 2. cross section and high gas velocity, which can cause the high heat transfer coefficient.

In addition, the turbulent intensity of syngas flow across membrane helical coils increases with the decrease of radial pitch to cause the increase of the local heat transfer coefficients on membrane helically coiled tube surface.

Results N 2 Gas He. steam, was designed for investigation of high pressure and high Re steam or two-phase flow thermal-hydraulic problems in nuclear reactors. LAFLOST was also capable to instrument the study of heat transfer and pressure drop, steam void friction and other problems concerning with the performance of steam-water two phase flow.

The maximum bubble interfacial heat transfer coefficient is related to the bubble rise velocity. The steam Nusselt number (N u s = 2 h R n / λ w) is used to represent the maximum bubble interfacial heat transfer coefficient.

The steam-water Reynolds number (Re w s = (2 u s R n) / ν w) is used to represent the effect of inertia : Binbin Qiu, Qingchuan Yang, Fanrui Meng, Dan Zhang, Daotong Chong, Jiping Liu, Junjie Yan.

As shown in Fig. 12 for the equivalent thermal resistance circuit, total wall heat flux (and overall heat transfer coefficient h t inside the tube), taking account of the superheated condition of steam–gas mixtures, is given by (20) q t ″=h t (T s b −T wi)= T s b −T wi 1 h c +h s T b −T s i T s b −T s i + 1 h f where h f is the heat Cited by: A method for simulating continuous process conditions was developed in the 60 L heat transfer test rig at the University of Auckland.

Heat transfer was measured for conditions of to g/L [SiO 2], to °C surface temperature, to m/s flow velocity, and to g/L red mud concentration.

A deposition model is proposed to. •A variety of high-intensity heat transfer processes are involved with combustion and chemical reaction in the gasifier unit itself. •The gas goes through various cleanup and pipe-delivery processes to get to our heat transfer processes involved in these stages are generally less intense.

The experimental apparatus used in steam jet condensation, except the steam nozzle, was the same as that used in, as shown in Fig. 1(a). It consisted mainly of a steam generator, a surge tank, a water tank, and a high-speed video camera.

Steam was generated by the steam generator and flowed through adiabatic pipes. Sizing Steam Pipes - Steam is a compressible gas where the capacity of a pipe line depends on the size of the pipe and the steam pressure. Speed and Velocity Converter - Convert speed and velocity units - m/s, km/h, knots, mph and ft/s.

Online calculator to quickly determine Steam Velocity through Piping. Includes 53 different calculations. Equations displayed for easy reference.

To change the steam velocity, you would have to redesign the exchanger for lower internal cross sectional area. If you did that you may have to change PID constants in the control loop to achieve a critically damped control response.

You can not consider this as a simple heat transfer problem as there is an active feedback controller in the system. Again, this creates quality issues and excess costs, all caused by not considering the velocity in the heat exchanger.

Velocity Affects Thermal Transfer. Often less understood, is the effect of velocity on the thermal transfer characteristics of the heat exchanger: It turns out that the higher the velocity through the heat exchanger, the higher.

The second heat transfer process is convection, or heat transfer due to a flowing fluid. The fluid can be a gas or a liquid; both have applications in aerospace technology. In convection heat transfer, the heat is moved through bulk transfer of a non-uniform temperature fluid.

Mean heat-transfer coefficient over a surface. The term mean heat-transfer coefficient is open to various interpretations. In textbooks one often sees expressions for mean heat-transfer coefficient written (2) α = 1 L ∫ 0 L α d x= 1 L ∫ 0 L q Δ T d x where x is distance measured along a surface of length quantity has no particular significance when both q and ΔT depend on x.

Heat Pipe Apparatus superconducting device and involves the transfer of heat by boiling and condensation of a fluid and hence transfer of heat takes place under nearly isothermal condition.

In this apparatus the comparison of heat pipe with the copper pipe as good conductor of heat and with the stainless steel pipe as same material of construction is made. INVESTIGATION OF HEAT TRANSFER AUGMENTATION THROUGH USE OF INTERNALLY FINNED AND ROUGHENED TUBES (Final Summary Report) while at equal pumping power, the performance was as high as percent.

These improvements, which are attributed to increased area Schematic of Steam Condensation Apparatus 3. Isothermal Friction Factors for Smooth. Hideo Ide is a professor in the Graduate School of Science and Engineering at Kagoshima University, Japan. He received his doctor of engineering degree in from Kyushu University, Japan.

His main research interests are in the elucidation of flow and heat transfer phenomena in gas–liquid two-phase flow in mini- and microchannels, the problems of heat removal. Find out about the principles of steam engineering and heat transfer, including a comprehensive guide to engineering best practice covering all aspects of steam and condensate systems; from the boiler house and steam distribution system up to the point of use; through the condensate recovery system and returning to the boiler.

Virtually all major applications and products are discussed. for true evaluation of the heat transfer process. The following theore tical analysis covers bubbly and annular dispersed flow regions that are of prime interest for water reactors design.

2.a - BUBBLY FLOW This region should cover both subcooled and low qualities boiling. With high heat fluxes local boiling occurs before the average. This paper presents an experimental investigation into the heat transfer and pressure drop characteristics of air flow in a staggered flat tube bank in crossflow with laminar-forced convection.

Numerical simulation and experimental study were conducted in order to analyze flow patterns and finally to find out appropriate alternatives for uniform flow in the transition zone of the vertical type Heat Recovery Steam Generator (HRSG) for a gas turbine combined cycle.

To understand flow patterns in the interconnecting duct between the gas turbine exhaust and the inlet of the HRSG, flow.The forced convective heat transfer (FCHT) properties of nanofluids, made of Fe3O4 nanomaterials and deionized water, are firstly measured by a self-made forced convective heat transfer apparatus.

The nanofluid flows through a horizontal copper tube in the transition region with Reynolds numbers in the range of &#x; Some parameters .Boiling heat transfer correlations were obtained for the maximum and minimum heat fluxes. Relationships among q min / q max ⁠, Weber number, and liquid Jakob number were ling evidence was found to indicate that significant cooling of the wake and/or the forward stagnation line can be caused by large-scale liquid–solid contacts while other parts of the surface experienced.