Journal ArticleDOI
A Metho of Comparing Performance of Extended-Surface Heat Exchangers
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In this paper, the performance of a gas-cooled heat exchanger per unit of power expended to the flowing gas provided a useful figure of merit for extended-surface heat exchangers.Abstract:
The expression for the performance of a gas-cooled heat exchanger per unit of power expended to the flowing gas provides a useful figure of merit for extended-surface heat exchangers. As developed here, the expression accounts for the effects of both increased heat transfer coefficient and increased effective temperature difference with higher power expended. Previous expressions accounted for only the increase in heat transfer coefficient. The convenience of comparing different heat exchanger configurations, as well as different tube spacing in the same configuration, is shown.read more
Citations
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Journal ArticleDOI
Condensation of a refrigerant CFC11 in horizontal microfin tubes (Proposal of a correlation equation for frictional pressure gradient)
TL;DR: In this paper, local heat transfer and pressure drop measurements were made during condensation of CFC11 in horizontal microfin tubes and a correlation equation for the local frictional pressure gradient was derived, in which the effect of refrigerant mass velocity was introduced on the basis of the flow regime consideration.
Book ChapterDOI
A porous medium approach for the thermal analysis of heat transfer devices
TL;DR: In this paper, a method for modeling transport phenomena in heat transfer devices is discussed, which is based on the averaging method in which the heat transfer device are treated as a fluid-saturated porous medium.
Book ChapterDOI
Design Considerations for Air-Conditioning Evaporator and Condenser Coils
TL;DR: In this article, major factors affecting heat transfer between the refrigerant and air in a plate finned-tube heat exchanger, otherwise known as an evaporator or condenser coil, are discussed.
Journal ArticleDOI
Comparative analysis of microfin vs smooth tubes in R32 and R410A condensation
TL;DR: In this article, a comparative analysis of R32 and R410A condensation inside a 4.2 mm ID microfin tube is performed, where the effects of saturation temperature, vapour quality and mass velocities are evaluated.
Journal ArticleDOI
Numerical Simulation of a Heat Pump Evaporator Considering the Pressure Drop in the Distributor and Capillary Tubes
TL;DR: In this article, a simulation program was developed to evaluate the heat transfer performance of a multi-pass fin-tube evaporator, considering the pressure drop in the distributor and capillary tubes.
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.
Journal ArticleDOI
Extended performance evaluation criteria for enhanced heat transfer surfaces
Journal ArticleDOI
Methods for Evaluating the Performances of Compact Heat Transfer Surfaces
B. Cox,P. A. Jallouk +1 more
TL;DR: In this article, the authors evaluate the performance of compact surfaces based on their simultaneous heat transfer rats and pumping power expenditures and derive the minimum cost surface from a single plot and requires no specific cost information.