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Friday, May 15, 2020 | History

1 edition of Optimization of an internally finned rotating heat pipe found in the catalog.

Optimization of an internally finned rotating heat pipe

Geraldine L. Olson

Optimization of an internally finned rotating heat pipe

by Geraldine L. Olson

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  • 6 Currently reading

Published by Naval Postgraduate School, Available from National Technical Information Service in Monterey, Calif, Springfield, Va .
Written in English


Edition Notes

ContributionsSalinas, David
The Physical Object
Pagination63 p. ;
Number of Pages63
ID Numbers
Open LibraryOL25481313M

Your complete resource on heat pipe operation, behavior, performance characteristics, and limitations This book is designed to help students, operations engineers, and mechanical and electrical engineers in the electronic packaging industry grasp the principles of operation for a wide range of heat pipes. Packed with examples and design information, it takes you through the background and. Numerical Modeling of Heat Pipe Radiator and Fin Size Optimization for Low and No Gravity Environments. is approved in partial fulfillment of the requirements for the degree of. Master of Science in Engineering - Mechanical Engineering. Department of Mechanical Engineering. Yitung Chen, Ph.D., Committee Chair Robert Boehm, Ph.D., Committee MemberAuthor: Virginia Ruth Bieger.

Heat Transfer Analysis and Optimization of Engine Cylinder Fins by Varying Its Geometry and Material Rao In an internal combustion engine, the expansion of the high-temperature and - Parametric study of finned heat transfer for Air Cooled Motorcycle Engine, SAE Paper, . ATS tube-to-fin, liquid-to-air heat exchangers are made with the industry's highest density fins to maximize heat transfer from liquid to air, allowing the liquid to be cooled to lower temperatures than other heat exchangers on the market. The heat exchanger fins and tubes are made.

I went about your problem this way: (conduction heat loss to water) = (specific heat of water)(water mass flow through pipe)(temp of water flowing out - temp of water flowing in) (convective heat loss to air) = (heat transfer coefficient of cylinder wall to air)(surface area of cylinder exposed to air)(temperature of cylinder wall - ambient temperature). The length of the condenser of the heat pipe was opti- mized as a function of the radial heat flux rate and the ratio of the liquid flow rate in the annulus to that within the wick, Wa/Ww. The effect of pressure loss and recovery in the vapor passage of the heat pipe on the optimum length of condenser was Size: 3MB.


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Optimization of an internally finned rotating heat pipe by Geraldine L. Olson Download PDF EPUB FB2

Optimization of an internally finned rotating heat pipe - NASA/ADS A finite element formulation with linear triangular elements was used to solve the steady-state, two-dimensional conduction heat transfer equation in the condenser wall section of an internally finned rotating heat : Geraldine L.

Olson. Approved for public release; distribution is unlimitedA finite element formulation was used to solve the steady-state two-dimensional conduction heat transfer equation in the condenser wall section of an internally finned rotating heat : Jr.

William A. Davis. Optimization of an internally finned rotating heat pipe. By Geraldine L. Olson Download PDF (4 MB)Author: Geraldine L.

Olson. A finite element formulation was used to solve the steady-state two-dimensional conduction heat transfer equation in the condenser wall section of an internally finned rotating heat pipe.

A FORTRAN program using this method was coupled with the COPES/CONMIN program for sensitivity analysis of design variables and for automated design of the internal heat pipe geometry. In the present work the problem of optimizing the geometry of internally finned tubes in order to enhance the heat transfer under laminar flow conditions is studied.

The velocity and temperature distributions on the finned tube cross-section are determined with the help of a finite element model, and a global heat transfer coefficient is by:   The present work deals with thermal optimization of an internally finned tube having axial straight fins with axially uniform heat flux and peripherally uniform temperature at the wall.

The physical domain was divided into two regions: One is the central cylindrical region of the fluid extending to the tips of the fins and the other constituted the remainder of the tube by: 7. Similarly, the performance of the internally finned cylindrical condenser was remarkably superior to that of the smooth-wall cylindrical condenser.

A rotating heat pipe was tested using various copper condenser configurations including two smooth-wall cylinders, an internally finned cylinder and a truncated by: 1. Fig.1 The geometry of an internally finned tube.

Hot water is used as a medium to flow inside the tube with an inlet temperature of heat produced by hot water is taken away by means of convection to the fin and later on it is conducted through a rectangular micro fin to the surface of the Size: KB.

ANALYSIS OF AN INTERNALLY FINNED ROTATING HEAT PIPE. Salinas & P. Marto. Pages: Parametric study and optimization on heat transfer and flow characteristics in a rectangular channel with longitudinal vortex generators Tang et al.

Vol - Issue These are lecture notes for AME Intermediate Heat Transfer, a second course on heat transfer for undergraduate seniors and beginning graduate students. At this stage the student can begin to apply knowledge of mathematics and computational methods to the problems of heat transfer.

Thus. Fin spacing optimization at Lflow = mm (6”) Before optimizing with a fan, it's quite instructive to obtain an optimization curve with a constant flow.

Figure 5 on the next page shows a fin spacing optimization curve at a constant air flow volume of 25 CFM ( m3/hr) and Lfin = 25 mm. Note that, as shown in Figure 1,File Size: KB. Heat transfer for laminar flow in internally finned pipes with different fin heights and uniform wall temperature.

Abstract. An analysis is presented for fully developed laminar convective heat transfer in a pipe provided with internal longitudinal fins, and with uniform outside wall by: Optimization of a Finned Shell and Tube Heat Exchanger Using a Multi-Objective Optimization Genetic Algorithm.

fins increase the internal and external tube heat transfer. 39/ Techniques of Heat Transfer Enhan cement and their Application. Integral-fin tubes. Tubes having to fins/m, and mm fin height are routinely used in shell-and-tube exchangers for enhancement of single-phase liquids, for boiling, and for condensation of low File Size: 2MB.

Experimental study of exergetic performance of Al 2 O 3 nanofluid in a double‐pipe heat exchanger fitted by a new Modeling and validation of heat transfer in packed bed with internal heat generation. Niraj J. Kulkarni; Second law analysis of a fossil‐geothermal hybrid power plant with thermodynamic optimization of geothermal preheater.

Carnavos [46] () proposed heat transfer and friction factor correlations for internally finned tubes in the turbulent flow regime based on experimental tests with 21 tube geometries, including axial fins and helical fins up to 30°.

His database covered tests with air, water and an ethylene glycol/water mixture. Heat pipes are composed of a sealed container, lined internally with a wick and filled partially with a working fluid.

Heat pipes are liquid-vapor phase change devices that can transfer heat from a hot source to a cold source through capillary forces generated by the flow of liquid in a wick or other porous media.

Mech Heat Transfer HW3 Solution 1. (Problem in the Book) Turbine blades mounted to a rotating disc in a gas turbine engine are exposed to a gas stream that is at T∞ =C and maintains a convection coefficient of h= W /m 2 ⋅K over the blades, which areFile Size: KB.

CiteScore: ℹ CiteScore: CiteScore measures the average citations received per document published in this title. CiteScore values are based on citation counts in a given year (e.g.

) to documents published in three previous calendar years (e.g. – 14), divided by the number of documents in these three previous years (e.g. – 14). Heat transfer enhancement and optimization of flat-tube multilouvered fin compact heat exchangers with delta-winglet vortex generators Daniel Jonas Dezan, Leandro Oliveira Salviano, Jurandir Itizo.

•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.[2] studied the fluid flow and heat transfer characteristics of double-pipe heat exchanger with rotating inner tube.

The experiments carried out for the speed of rotation of inner tube from 0 to rpm. The effectiveness and NTU number obtained for parallel flow and counter flow arrangement.Reliable computational fluid dynamics (CFD) simulations of various constructal pin-fin models are performed, and detailed flow and heat transfer characteristics are presented.

The results show that by using the proposed system with optimized pin-fin heat exchanger the stored thermal energy can be increased by %.Cited by: