Journal ArticleDOI
Second law analysis in heat transfer
TLDR
In this article, the second law of thermodynamics is used as a basis for evaluating the irreversibility associated with simple heat transfer processes, such as heat augmentation techniques, heat exchanger design, and thermal insulation systems.About:
This article is published in Energy.The article was published on 1980-08-01. It has received 612 citations till now. The article focuses on the topics: Convective heat transfer & Heat transfer.read more
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Entropy generation minimization: The new thermodynamics of finite-size devices and finite-time processes
TL;DR: Entropy generation minimization (finite time thermodynamics, or thermodynamic optimization) is the method that combines into simple models the most basic concepts of heat transfer, fluid mechanics, and thermodynamics as mentioned in this paper.
Journal ArticleDOI
What is energy efficiency?: Concepts, indicators and methodological issues
TL;DR: In this article, the authors review the range of energy efficiency indicators that can be used, particularly at the policy level, and discuss the specific limitations and appropriate uses of physical thermodynamic, economic-thermodynamic and pure economic indicators.
Journal ArticleDOI
Local entropy production in turbulent shear flows: a high-Reynolds number model with wall functions
Fabian Kock,Heinz Herwig +1 more
TL;DR: In this article, entropy production in incompressible turbulent shear flows of Newtonian fluids is analyzed systematically and incorporated into a CFD code, based on asymptotic considerations wall functions for the four production terms are developed.
Journal ArticleDOI
Investigation of entropy generation in MHD and slip flow over a rotating porous disk with variable properties
TL;DR: In this paper, the effects of magnetic interaction number, slip factor and relative temperature difference on velocity and temperature profiles as well as entropy generation in magnetohydrodynamic (MHD) flow of a fluid with variable properties over a rotating disk are investigated using numerical methods.
Journal ArticleDOI
Rationalisation of second law analysis of heat exchangers
TL;DR: In this article, the authors present an approach that resolves some perceived inconsistencies and paradoxes in second law analysis of a compressible gas with friction and heat addition, and show that the basic entropy generation relationship for gas flows is controlled by the flow Mach number, consistent with an extension of Shapiro's classical one-dimensional flow analysis.
References
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Journal ArticleDOI
Compact heat exchangers
TL;DR: The third edition of the second edition as discussed by the authors was published in 1964 and contains basic test data for eleven new surface configurations, including some of the very compact ceramic matrices, in both the English and the Systeme International (SI) system of units.
Book ChapterDOI
Heat Transfer and Friction in Turbulent Pipe Flow with Variable Physical Properties
TL;DR: In this article, the authors discuss heat transfer and skin friction in turbulent pipe flow with variable physical properties and highlight analytical methods to describe heat transfer mechanisms for constant liquid properties quite satisfactorily and to take into account the influence of the variation of physical properties with temperature versus heat transfer.
Laws of Flow in Rough Pipes
TL;DR: In this paper, an experimental investigation was made of the turbulent flow of water in pipes with various degrees of relative roughness, and the laws of resistance and velocity distributions were obtained as a function of the roughness and Reynolds number.