Author: Riyaz Amir Papar
Publisher:
ISBN:
Category :
Languages : en
Pages : 194

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Author: Sujoy Kumar Saha
Publisher: Springer
ISBN: 3030207730
Category : Science
Languages : en
Pages : 125

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Book Description
This Brief deals with electrode design and placement, enhancement of both liquid and gas flow, vapor space condensation, in-tube condensation, falling film evaporation, correlations. It further provides a fundamental understanding of boiling and condensation, pool boiling, critical heat flux, convective vaporization, additives for single-phase liquids like solid particles, gas bubbles, suspensions in dilute polymer and surfactant solutions, solid additives and liquid additives for gases, additives for boiling, condensation and absorption, mass transfer resistance in gas phase (condensation with noncondensible gases, evaporation into air, dehumidifying finned tube heat exchangers, water film enhancement of finned tube exchanger), controlling resistance in liquid phase, and significant resistance in both phases. The volume is ideal for professionals and researchers dealing with thermal management in devices.

Author:
Publisher: Academic Press
ISBN: 0080575870
Category : Technology & Engineering
Languages : en
Pages : 543

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Book Description
Advances in Heat Transfer is designed to fill the information gap between regularly scheduled journals and university level textbooks by providing in-depth review articles over a broader scope than is allowable in either journals or texts.

Author: S.G. Kandlikar
Publisher: Routledge
ISBN: 1351442198
Category : Science
Languages : en
Pages : 786

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Book Description
Provides a comprehensive coverage of the basic phenomena. It contains twenty-five chapters which cover different aspects of boiling and condensation. First the specific topic or phenomenon is described, followed by a brief survey of previous work, a phenomenological model based on current understanding, and finally a set of recommended design equa

Author: Syed Waqas Ahmad
Publisher:
ISBN:
Category :
Languages : en
Pages :

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The effect of surface modification and high intensity electric field (uniform and non - uniform) acting separately or in combination on pool boiling of R-123 is presented in this thesis. The effect of surface modification was investigated on saturated pool boiling of R-123 for five horizontal copper surfaces modified by different treatments, namely: an emery polished surface, a fine sandblasted surface, a rough sandblasted surface, an electron beam (EB) enhanced surface and a sintered surface. Each 40 mm diameter heating surface formed the upper face of an oxygen-free copper block, electrically heated by embedded cartridge heaters. The experiments were performed from the convective heat transfer regime to the critical heat flux, with both increasing and decreasing heat flux, at 1.01 bar, and additionally at 2 bar and 4 bar for the emery polished surface. Significant enhancement of heat transfer with increasing surface modification was demonstrated, particularly for the EB enhanced and sintered surfaces. The emery polished and sandblasted surface results are compared with nucleate boiling correlations and other published data. The effect of uniform and non-uniform electric fields on saturated pool boiling of R-123 at 1.01 bar pressure was also examined. This method of heat transfer enhancement is known as electrohydrodynamic abbreviated as EHD-enhancement. A high voltage potential was applied at the electrode located above the heating surface, which was earthed. The voltage was varied from 0 to 30 kV. The uniform electric field was provided through a 40 mm diameter circular electrode of stainless steel 304 wire mesh having an aperture of 5.1 mm, while the non-uniform electric field was obtained by using a 40 mm diameter circular rod electrode with rods 5 and 8 mm apart. The effect of uniform electric field was investigated using all five modified surfaces, i.e. emery polished, fine sandblasted, rough sandblasted, EB enhanced and sintered surfaces, while non - uniform electric field was tested using the emery polished, fine sandblasted, EB enhanced and sintered surfaces. The effect of pressure on EHD enhancement was also examined using emery polished surface at saturation pressure of 2 and 4 bars while the electric field was fix at 20 kV corresponding to 2 MV/m. Further, the bubble dynamics is presented for the emery polished surface obtained using a high-speed high - resolution camera.

Author:
Publisher:
ISBN:
Category : Heat engineering
Languages : en
Pages : 594

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Author: M. Mohamed Ohadi
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 140

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Book Description
Comprises 15 contributions drawn from the November 1995 ASME International Mechanical Engineering Congress and Exposition. Topics include progress in enhanced heat and mass transfer; thermal characteristics of refrigerants/refrigerant mixtures; new methods to improve thermal performance of power and

Author: Alok Kumar
Publisher:
ISBN:
Category :
Languages : en
Pages : 216

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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 16

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Author: Sri Laxmi Priya Raghupathi
Publisher:
ISBN:
Category :
Languages : en
Pages : 194

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Book Description