Heat Transfer Enhancement in Plate and Fin Extended Surfaces PDF Download
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Author: Sujoy Kumar Saha
Publisher: Springer
ISBN: 3030207366
Category : Science
Languages : en
Pages : 145
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Book Description
This Brief deals with heat transfer and friction in plate and fin extended heat transfer enhancement surfaces. It examines Offset-Strip Fin (OSF), Enhancement Principle, Analytically Based Models for j and f vs. Re, Transition from Laminar to Turbulent Region, Correlations for j and f vs. Re, Use of OSF with Liquids, Effect of Percent Fin Offset, Effect of Burred Edges, Louver fin, heat transfer and friction correlations, flow structure in the louver fin array, analytical model for heat transfer and friction, convex louver fin, wavy fin, 3D corrugated fin, perforated fin, pin fins and wire mesh, types of vortex generators, metal foam fin, plain fin, packings, numerical simulation of various types of fins.
Author: Sujoy Kumar Saha
Publisher: Springer
ISBN: 3030207366
Category : Science
Languages : en
Pages : 145
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Book Description
This Brief deals with heat transfer and friction in plate and fin extended heat transfer enhancement surfaces. It examines Offset-Strip Fin (OSF), Enhancement Principle, Analytically Based Models for j and f vs. Re, Transition from Laminar to Turbulent Region, Correlations for j and f vs. Re, Use of OSF with Liquids, Effect of Percent Fin Offset, Effect of Burred Edges, Louver fin, heat transfer and friction correlations, flow structure in the louver fin array, analytical model for heat transfer and friction, convex louver fin, wavy fin, 3D corrugated fin, perforated fin, pin fins and wire mesh, types of vortex generators, metal foam fin, plain fin, packings, numerical simulation of various types of fins.
Author: Bengt Sundén
Publisher: Witpress
ISBN:
Category : Science
Languages : en
Pages : 320
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Book Description
Descripción del editor: "This volume is concerned with the heat transfer from extended surfaces, such as fins attached to a primary transfer surface. These are used extensively within heat exchanges and on heat transfer equipment to ensure that a specified rate of heat transfer is achieved between a heat source and sink. All of the chapters come from invited contributors and follow a unified outline and presentation.Contents: Overview of Extended Surface Heat Transfer ââ,¬â€œ Fins; Coupled Forced Convection, Conduction and Thermal Radiation of a Rectangular Fin in a Confined Space; Mechanistic Investigation of the Performance of a Triangular Fin; Conjugate Free and Mixed Convection Heat Transfer from a Vertical Fin Embedded in a Porous Medium; About Fin Performance and Optimization; Two-Dimensional Effects in Extended Surface Assessment; Steady-State Heat Transfer and Performance Assessment; Multi-Louvred Fin Surfaces; Methodology for the Design of Multi-Stream Plate-Fin Heat Exchangers; Incorporation of a Consideration of Operability into the Design of Multi-Stream Heat Exchangers." (WIT Press).
Author: Alexander Louis London
Publisher: CRC Press
ISBN: 9781560320128
Category : Heat exchangers
Languages : en
Pages : 798
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Book Description
Heat exchangers are a crucial part of aerospace, marine, cryogenic and refrigeration technology. These essays cover such topics as complicated flow arrangements, complex extended surfaces, two-phase flow and irreversibility in heat exchangers, and single-phase heat transfer.
Author: Sadik Kakaç
Publisher: Springer Science & Business Media
ISBN: 9401591598
Category : Technology & Engineering
Languages : en
Pages : 670
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Book Description
Heat transfer enhancement in single-phase and two-phase flow heat exchangers in important in such industrial applications as power generating plant, process and chemical industry, heating, ventilation, air conditioning and refrigeration systems, and the cooling of electronic equipment. Energy savings are of primary importance in the design of such systems, leading to more efficient, environmentally friendly devices. This book provides invaluable information for such purposes.
Author: Daniel Dannelley
Publisher:
ISBN:
Category : Electronic dissertations
Languages : en
Pages : 122
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Book Description
This work investigates a technique to improve extended surface heat transfer through the use of fractal-like geometric patterns. When fractal-like geometries are considered, significant gains in the available surface area for fins can be achieved without large increases in fin volume or mass. For certain fractal patterns, the surface area of a fin can even be increased while reducing the mass of the fin. This would provide direct benefit for situations where the extended surface volume is restricted or minimized weight is desired. Fractal-like geometries are presented to increase the effectiveness and effectiveness per unit mass of fins for natural convection heat transfer as well as increase effectiveness per mass for radiation heat transfer. Common extended surface heat transfer methods and developments were reviewed to obtain an understanding of the focus and limitations of previous work. Based on this literature review, it has been observed that the use of fractal-like geometries has been utilized for engineering applications. However, the use of fractal-like geometries for extended surface heat transfer has not been studied and therefore justified an investigation into their behavior. In an initial investigation, fractal-like fins were manufactured in the patterns of the baseline and first three iterations of the Sierpinski carpet (base width of 0.1016 m, 0.0508 m, 0.0254 m) and modified Koch snowflake (base width of 0.1016 m) in order to quantify practicality and thermal performance. It was observed that fractal-like fins could result in increased fin effectiveness per unit mass by as much as 59%. Motivated by the initial experimental results, subsequent studies utilized computational modeling with a commercially available, industry standard computational modeling program. A computational investigation of iii natural convection heat transfer from fractal-like fins was able to further support conclusions of the experimental results as well as model an additional iteration. Fin effectiveness per unit mass was increased by a minimum of 37% for the conditions tested. Finally, a computational investigation of radiation heat transfer from fractal-like fins showed that fin effectiveness per unit mass increased by a minimum of 25% for the conditions tested.
Author: Alejandro Datas
Publisher: Woodhead Publishing
ISBN: 0128204214
Category : Science
Languages : en
Pages : 370
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Book Description
Ultra-High Temperature Thermal Energy Storage, Transfer and Conversion presents a comprehensive analysis of thermal energy storage systems operating at beyond 800°C. Editor Dr. Alejandro Datas and his team of expert contributors from a variety of regions summarize the main technological options and the most relevant materials and characterization considerations to enable the reader to make the most effective and efficient decisions.This book helps the reader to solve the very specific challenges associated with working within an ultra-high temperature energy storage setting. It condenses and summarizes the latest knowledge, covering fundamentals, device design, materials selection and applications, as well as thermodynamic cycles and solid-state devices for ultra-high temperature energy conversion.This book provides a comprehensive and multidisciplinary guide to engineers and researchers in a variety of fields including energy conversion, storage, cogeneration, thermodynamics, numerical methods, CSP, and materials engineering. It firstly provides a review of fundamental concepts before exploring numerical methods for fluid-dynamics and phase change materials, before presenting more complex elements such as heat transfer fluids, thermal insulation, thermodynamic cycles, and a variety of energy conversation methods including thermophotovoltaic, thermionic, and combined heat and power. Reviews the main technologies enabling ultra-high temperature energy storage and conversion, including both thermodynamic cycles and solid-state devices Includes the applications for ultra-high temperature energy storage systems, both in terrestrial and space environments Analyzes the thermophysical properties and relevant experimental and theoretical methods for the analysis of high-temperature materials
Author: Sujoy Kumar Saha
Publisher: Springer
ISBN: 303020748X
Category : Science
Languages : en
Pages : 175
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Book Description
This Brief deals with externally finned tubes, their geometric parameters, Reynolds number, dimensionless variables, friction factor, plain plate fins on round tubes, the effect of fin spacing, correlations, pain individually finned tubes, circular fins with staggered tubes, low integral fin tubes, wavy fin, enhanced plate fin geometries with round tubes, Offset Strip Fins, convex louver fins, louvered fin, perforated fin, mesh fin, vortex generator, enhanced circular fin geometries, spine or segmented fin, wire loop fin, flat extruded tubes with internal membranes, plate and fin automotive radiators, performance comparison, numerical simulation, advanced fin geometries, hydrophilic coatings, internally finned tubes and annuli, spirally fluted and indented tube, advanced internal fin geometries, and finned annuli. The book is ideal for professionals and researchers dealing with thermal management in devices.
Author: Ralph L. Webb
Publisher: Wiley-Interscience
ISBN:
Category : Science
Languages : en
Pages : 584
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Book Description
Indeed, today "second generation" enhancement concepts are routing in the automotive and refrigeration industries to obtain lower cost, smaller heat exchanger size, and higher energy efficiency in system operation. And the aerospace, process, and power generation industries are not far behind.
Author: Allan D. Kraus
Publisher: John Wiley & Sons
ISBN: 0471436631
Category : Science
Languages : en
Pages : 1120
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Book Description
Drei anerkannte Experten dieses schnellebigen, modernen Fachgebiets erläutern hier Theorie, Design und Anwendungen eines breiten Spektrums von Oberflächen, die speziell für den effizienten Wärmetransport ausgelegt sind. Behandelt werden u. a. kompakte Wärmetauscher, periodische Wärmeströme und Siedevorgänge an Kühlrippen. Umfassend und informativ!
Author: Chakole M.M.
Publisher: Anchor Academic Publishing
ISBN: 3960675496
Category : Technology & Engineering
Languages : en
Pages : 99
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Book Description
Heat exchangers are widely used in the industrial sector, e.g. in the refrigeration, air conditioning, petrochemical, and agricultural food industry. The high cost of energy and material has resulted in an increased effort aimed at producing high performance heat exchanger equipment. Passive methods of heat transfer enhancement do not need external power for enhancement. One of these kinds of passive technique is twisted tape inserts that enhance the performance of heat exchangers. Using multiple twisted tape inserts gives better enhancement than a single twisted tape insert. Using nanofluid gives also better thermal performance than water. Therefore, nanofluid along with twisted tape inserts was used in this study. For this study, different combinations of multiple twisted tape inserts were designed and fabricated. These different combinations contain dual, triple, and quadruple twisted tapes. Directions of twists are also varied which enables to study the effect of different swirl flow generators. Nanofluid is used with various volume concentrations of 0.07%, 0.14% and 0.21% in order to investigate the effect of nanoparticle concentration on heat transfer enhancement. Experimental investigation was carried out by having a constant heat flux condition and by varying the volume flow rate of flow from 2 to 10 lpm.
