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Paths combination for HENs retrofit

A., Osman and M.I., Abdul Mutalib and M., Shuhaimi and K.A., Amminudin (2009) Paths combination for HENs retrofit. Applied Thermal Engineering, 29 (14-15). pp. 3103-3109. ISSN 13594311

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Abstract

With the significant increase in fuel price, energy conservation projects should be reviewed and analyzed properly. Retrofit of heat exchanger networks (HENs) is among the common projects to reduce the plant operational cost. This paper introduced a new procedure using the path analysis approach for HEN retrofit. The developed procedure attempts at generating options for retrofit solution. These options are created by combining the available utility paths in HEN systematically. Instead of relying on a single path, the heat load could be shifted from HEN utilities using a set of paths simultaneously. To ensure feasible heat transfer between the hot and cold streams throughout, Exchanger Minimum Approach Temperature (EMAT) is maintained while shifting the heat load. The available exchangers' pressure drop is considered in calculating the heat transfer coefficients. HEN devices are subjected to some additional area without any topological modification. In addition, the investment of such area could be recovered in a short span of time. The calculation of this approach encountered some iteration which has been overcome by mathematical programming. Demonstration example showed some options to be reasonable retrofit solutions. Energy savings ranged between $150 K and $450 K per year with payback time of less than 2 years were possible. © 2009 Elsevier Ltd. All rights reserved.

Item Type:Article
Uncontrolled Keywords:Cold streams; Common projects; Energy saving; Fuel prices; Heat exchanger network; Heat exchanger networks; Heat integration; Heat loads; Minimum approach; Operational costs; Path analysis; Payback time; Retrofit; Single path; Topological modification; Conservation; Energy conservation; Heat transfer; Investments; Mathematical programming; Regression analysis; Retrofitting; Thermal load; Heat exchangers
Subjects:T Technology > TP Chemical technology
Departments / MOR / COE:Departments > Chemical Engineering
ID Code:585
Deposited By: Assoc Prof Dr Mohamed Ibrahim Abdul Mutalib
Deposited On:09 Mar 2010 02:09
Last Modified:19 Jan 2017 08:25

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