Get Advances in Industrial Heat Transfer PDF

By Alina Adriana Minea

ISBN-10: 143989907X

ISBN-13: 9781439899076

Advances in commercial warmth Transfer provides the fundamental rules of business warmth move enhancement. Serving as a reference and advisor for destiny learn, this e-book offers an entire technique, from remodeling apparatus to using nanofluids in industry.

Based at the most recent equipment of the scan and their interpretation, this booklet offers a unified perception of the commercial warmth move approach and tactics with a purpose to support reduce worldwide power intake. Containing either theoretical and functional effects, the ebook makes use of textual content, photographs, graphs, and definitions to demonstrate issues and spotlight concepts.

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Extra resources for Advances in Industrial Heat Transfer

Sample text

Qualitatively, the Wiedemann–Franz law can be understood by treating the electrons like a classical gas and comparing the resultant thermal conductivity to the electrical conductivity. 33 The fact that the ratio of thermal to electrical conductivity times the temperature is constant forms the essence of the Wiedemann–Franz law. It is remarkable that it is also independent of the particle mass and the number density of the particles. 3 are from Kittel (1976) and show a few values of Lorenz number at two different temperatures for selected metals.

2001; Shaikh et al. 2007), to cite just a few sources. This increase in thermal conductivity suggests that an increased heat transfer coefficient can be obtained by using such fluids. On the other hand, the presence of the solid particles increases in general the viscosity of the nanofluid and implicitly the pumping power with respect to the base fluid. The use of nanofluids seems to be a promising solution towards designing efficient heat exchanging systems, especially in the laminar flow regime.

Turbulent flow in a tube exhibits a low-velocity flow region immediately adjacent to the wall, known as the laminar boundary layer, with velocity approaching zero at the wall. Most of the thermal resistance occurs in this low-velocity region. Any roughness or enhancement technique that disturbs the laminar layer will enhance the heat transfer. The internal roughness of the tube surface is well known to increase the turbulent heat transfer coefficient. Therefore, for the example at hand, an enhancement technique employing a roughness or fin element of low height will disrupt the laminar layer and will thus enhance the heat transfer.

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Advances in Industrial Heat Transfer by Alina Adriana Minea

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