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Progress in Clean Energy, Volume 1 pp 371–387Cite as

Exergy-Based Design and Analysis of Heat Exchanger Networks

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Abstract

In this chapter, a new methodology for heat exchanger networks synthesis, extending traditional pinch technology to include exergy-destruction cost, is described and employed for practical applications. In the proposed approach, the cost rate of exergy destruction substitutes the utility cost in a trade-off between the operating and capital costs in the conventional pinch analysis to determine the optimum minimum approach temperature, ΔT min, in the energy assessment of heat exchanger networks (HENs). It is demonstrated that the balanced composite curves can be used directly in the calculation of the exergy destruction, heat recovery, and heat-transfer area for a specified minimum approach temperature. Moreover, it is showed that the grand composite curve can be utilized for determination of the optimal external utility allocation. The inclusion of thermal exergy destruction into pinch analysis decreases the optimum value of network ΔT min, due to increase in the system operating costs by considering both the external utility requirements and internal exergy destruction. The results of this assessment provide a better and more realistic utilization of external utilities considers the required capital investment. Two case studies are presented to show how to apply the proposed methodology effectively and practically. Case studies are analyzed using Aspen energy analyzer software.

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Abbreviations

ΔT :

Temperature difference, °K

ΔT min :

Minimum approach temperature, °K

A :

Heat-transfer area (m2)

T 0 :

Surrounding temperature (°K)

q :

Heat flow (kW)

T :

Temperature (°K)

h :

File heat-transfer coefficient (kW · m−2 · K−1)

Ėx:

Exergy flow (kW)

cx:

Cost per unit of exergy ($ · kW−1)

\( \dot{K} \) :

Cost rate ($ · s−1)

CC:

Capital cost of a heat exchanger ($)

a :

The installation cost set coefficient of a shell and tube heat exchanger

b, c :

The duty/area-related cost set coefficients of a shell and tube heat exchanger

N shell :

The number of heat exchanger shells in a heat exchanger

OC:

Operating cost ($ · year−1)

C :

Annual utility cost ($ · kW−1ċyear−1)

A f :

The annualization factor (year−1)

ROR:

The rate of return, percent of capital

PL:

Plant lifetime (year)

LMTD:

Log mean temperature difference

H:

Hot

C:

Cold

des:

Destruction

net:

Network

hu:

Hot utility

cu:

Cold utility

min:

Minimum

in:

Inlet

out:

Outlet

f:

Fuel

CI:

Capital investment

OM:

Operation and maintenance

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Authors and Affiliations

  1. Clean Energy Research Laboratory, Faculty of Engineering and Applied Science, University of Ontario Institute of Technology, 2000 Simcoe Street North, Oshawa, ON, Canada, L1H 74K

    S. Aghahosseini & I. Dincer

Authors
  1. S. Aghahosseini
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  2. I. Dincer
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Corresponding author

Correspondence to S. Aghahosseini .

Editor information

Editors and Affiliations

  1. Department of Mechanical Engineering, University of Ontario, Oshawa, Ontario, Canada

    Ibrahim Dincer

  2. Department of Mechanical Engineering, Dokuz Eylul University, Izmir, Turkey

    C. Ozgur Colpan

  3. Department of Energy Systems Engineering, Suleyman Demirel University, Isparta, Turkey

    Onder Kizilkan

  4. Department of Mechanical Engineering, Dokuz Eylul University, Izmir, Turkey

    M. Akif Ezan

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Aghahosseini, S., Dincer, I. (2015). Exergy-Based Design and Analysis of Heat Exchanger Networks. In: Dincer, I., Colpan, C., Kizilkan, O., Ezan, M. (eds) Progress in Clean Energy, Volume 1. Springer, Cham. https://doi.org/10.1007/978-3-319-16709-1_26

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  • DOI: https://doi.org/10.1007/978-3-319-16709-1_26

  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-319-16708-4

  • Online ISBN: 978-3-319-16709-1

  • eBook Packages: EnergyEnergy (R0)

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