Heat transfer in a twin-screw multiphase pump: Thermal modeling and one application in the petroleum industry

Within the past 30 years, many Enhanced Heat Transfer (EHT) technologies have become available in a number of forms for application in heat exchangers. These technologies are used in various industries to widely different extents. In 1999, H. Joshi, T. Rudy, and A. Wanni, former Ph.D. students of Dr. Ralph L. Webb and specialists in the application of EHTs in the Petroleum Industry prepared a paper for the Journal of Enhanced Heat Transfer that reviewed the extent of use of EHT Technologies in the Petroleum Industry [1]. The current paper reviews how the application of EHT in the Petroleum Industry has changed in the last 14 years.

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Thermal Contact Electronic Packaging in Solar Pointing Space Environment

Journal of Solar Energy Engineering ◽

10.1115/1.2929950 ◽

1991 ◽

Vol 113 (1) ◽

pp. 42-50 ◽

Cited By ~ 2

Author(s):

Kurt O. Lund ◽

Anthony M. Colangelo ◽

Gregory S. McKim

Keyword(s):

Heat Transfer ◽

Space Shuttle ◽

Thermal Contact ◽

Thermal Modeling ◽

Radiation Heat Transfer ◽

Thermal Design ◽

Space Environment ◽

Radiation Heat ◽

Flow Paths ◽

Flux Intensity

A thermal design for a solar pointing Space Shuttle mission is presented. The apparatus, which will measure solar flux intensity variations, contains sensors and data acquisition electronics which must be maintained within certain temperature constraints. The thermal design, which utilizes parallel heat flow paths and conduction fins to reject dissipated heat, is shown by finite difference thermal modeling to maintain component temperatures within these constraints. In the thermal modeling, arithmetic nodes are used to represent surface radiosity for radiation heat transfer. Also, the concept of mean fin conduction length and effective fin capacitance are introduced as means of simplifying the model representation of the conduction fins. An experiment was conducted to evaluate the chip/fin contact conductance.

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Numerical Investigation on a Twin-Screw Multiphase Pump Under low IGVF

International Journal of Fluid Machinery and Systems ◽

10.5293/ijfms.2021.14.4.335 ◽

2021 ◽

Vol 14 (4) ◽

pp. 335-344

Author(s):

Shuaihui Sun ◽

Pengbo Wu ◽

Pengcheng Guo ◽

Guangzhi Yi ◽

Ahmed Kovacevic

Keyword(s):

Numerical Investigation ◽

Multiphase Pump ◽

Twin Screw

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Thermal Modeling Using Two-Port Network Impedance Fractional-Order Approximations

10.1115/detc2021-69968 ◽

2021 ◽

Author(s):

Jean-François Duhé ◽

Stéphane Victor ◽

Pierre Melchior ◽

Youssef Abdelmounen ◽

François Roubertie

Keyword(s):

Heat Transfer ◽

Frequency Domain ◽

Fractional Order ◽

Heat Dissipation ◽

Thermal Modeling ◽

Building Design ◽

Frequency Domain Analysis ◽

Conductive Heat ◽

Frequency Behavior ◽

Thermal Phenomena

Abstract Sufficiently accurate thermal modeling is necessary for many applications such as heat dissipation, melting processes, building design or even bio-heat transfers in surgery. Circuit models help modeling heat transfer dynamics: this method is simple and is often used to model thermal phenomena. However, such models well approximates low and high frequency behavior but they are not accurate enough in the middle band of interest, thus lacking of precision in dynamical terms. A more complete and accurate description of conductive heat transfer can be obtained by using a two-port network. The resulting analytical expressions are complex and nonlinear in the frequency ω. This complexity in the frequency domain is difficult to handle when it comes to control applications and more specifically in real-time applications such as surgery. Consequently, an analysis of this thermal two-port network in the frequency domain directly leads to fractional-order systems. A frequency domain analysis of the series and shunt impedances will be presented and different approximations will be explored in order to obtain simple but sufficiently precise linear fractional transfer function models. The series impedances are approximated by using asymptotic and pole-zero approximations and the shunt impedance is approximated by using a capacitance approximation and two fractional model approximations.

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