Journal of Heat Transfer

Volume: Page/CID:

Heat Transfer and Friction Factor of Coil-Springs Inserted in the Horizontal Concentric Tubes
The goal of this investigation is to obtain definitive information about the heat transfer characteristics of circular coil-spring turbulators. This is achieved by measuring the wall temperatures on t...

Heat Transfer Characteristics of a Swirling Laminar Impinging Jet
This paper describes the characteristics of the heat transfer and flow of a swirling laminar impinging jet in a comparatively narrow space with a confined wall. Air is impinged on a flat surface with ...

J. Heat Transfer / Volume 132 / Issue 1 / Research Papers / Heat Exchangers

Exergy Study of Fouling Factors in Heat Exchanger Networks

J. Heat Transfer -- January 2010 -- Volume 132, Issue 1, 011802 (4 pages)
doi:10.1115/1.3194766

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ABSTRACT

REFERENCES (12)

Author(s):
Zunlong Jin, Qiwu Dong, and Minshan Liu
Thermal Energy Engineering Research Center, Zhengzhou University, Zhengzhou 450002, P.R. China

Selectionof fouling factors is somewhat arbitrary in heat exchanger networks(HENs) synthesis. Fouling factors were reconsidered in this article forheat exchanger networks design. An objective function based on exergoeconomicanalysis was introduced to assess optimal less conservative fouling factors.The objective took account of exergy consumption expense and heatexchanger capital cost at the same time. The exergy consumptionof heat transfer in HENs was calculated using subsection integralon balanced composite curves. The proposed method was applied toan industrial case. Numerical results indicated that the optimal lessconservative fouling factors were 80% of the original values andthe heat transfer area of the system saved 350 m² comparedwith root design. So it is necessary to reconsider thevalues of fouling factors for HENs design and that exergoeconomicanalysis is useful in determining the optimal less conservative foulingfactors.