Welcome To UTPedia

We would like to introduce you, the new knowledge repository product called UTPedia. The UTP Electronic and Digital Intellectual Asset. It stores digitized version of thesis, dissertation, final year project reports and past year examination questions.

Browse content of UTPedia using Year, Subject, Department and Author and Search for required document using Searching facilities included in UTPedia. UTPedia with full text are accessible for all registered users, whereas only the physical information and metadata can be retrieved by public users. UTPedia collaborating and connecting peoples with university’s intellectual works from anywhere.

Disclaimer - Universiti Teknologi PETRONAS shall not be liable for any loss or damage caused by the usage of any information obtained from this web site.Best viewed using Mozilla Firefox 3 or IE 7 with resolution 1024 x 768.

PATH ANALYSIS FOR THE RETROFIT OF HEAT EXCHANGER NETWORKS AND THE UTILITY SYSTEM

OSMAN ELSIDDIG, ABDELBAGI (2011) PATH ANALYSIS FOR THE RETROFIT OF HEAT EXCHANGER NETWORKS AND THE UTILITY SYSTEM. PhD thesis, Universiti Teknologi Petronas.

[img] PDF
Download (5Mb)

Abstract

This study introduced a new approach for HEN retrofit that featuring area addition to the existing exchangers without massive topology changes in HEN. The approach has developed based on a combinatorial method to combine the available utility paths in HEN systematically to generate several alternatives for increasing the process-toprocess heat recovery. To ensure feasible heat transfer between hot and cold streams, the Heat Recovery Approach Temperature (HRA T) is maintained while increasing the heat recovery. The available exchangers' pressure drop is considered in calculating the film heat transfer coefficients. A demonstrative example showed several retrofit options where the energy savings ranged from $150K/yr to $450K/yr with payback of less than 2 years to refund the investment rose from the mandatory area addition. The developed approach is termed as 'Paths Combination Approach for HEN Retrofit'. Moreover, a concept of varying the process stream temperature has been established to further increase the heat recovery and make the infeasible solutions more competitive. This concept mainly depends on the process streams' flexibility to changing the inlet and outlet temperature; and termed as the Temperature Flexibility concept (TF concept). Implementation alternatives are generated and integrated into the paths combination approach. Given that major changes in process conditions are rarely desired, the temperature changes has been kept within a small magnitude regardless of the usual process temperature oscillations. A user friendly computer programme has been developed for performing the approach in view of the significant number of iterations required. Most of the infeasible retrofit solutions have changed to the feasible zone where higher savings are featured along the temperature flexibility range. The energy savings derived from HEN retrofit have been further investigated to study the impact on the utility system. Through a case study integrating HEN retrofit and utility system, the most efficient way was found to redistribute the steam surplus among the utility system devices while considering the turbines flow constraints. Accordingly, the power production in the utility system has increased

Item Type: Thesis (PhD)
Academic Subject : Academic Department - Chemical Engineering - Separation Process
Subject: UNSPECIFIED
Divisions: Engineering > Chemical
Depositing User: Users 2053 not found.
Date Deposited: 18 Jul 2013 15:58
Last Modified: 25 Jan 2017 09:42
URI: http://utpedia.utp.edu.my/id/eprint/6681

Actions (login required)

View Item View Item

Document Downloads

More statistics for this item...