Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/89661
Title: Operational modeling of multistream heat exchangers with phase changes
Authors: Hasan, M.M.F. 
Karimi, I.A. 
Alfadala, H.E.
Grootjans, H.
Keywords: Cryogenics
LNG
Main cryogenic-heat exchanger
MINLP
Multi-stream heat exchangers
Phase change
Superstructure
Issue Date: Jan-2009
Citation: Hasan, M.M.F., Karimi, I.A., Alfadala, H.E., Grootjans, H. (2009-01). Operational modeling of multistream heat exchangers with phase changes. AIChE Journal 55 (1) : 150-171. ScholarBank@NUS Repository.
Abstract: Multistream heat exchangers (MSHE) enable the simultaneous exchange of heat among multiple streams, and are preferred in cryogenic processes such as air separation and LNG. Most MSHEs are complex; proprietary and involve phase changes of mixtures. Although modeling MSHE is crucial for process optimization, no such work exists to our knowledge. We present a novel approach for deriving an approximate operational (vs. design) model from, historic data for an MSHE. Using a superstructure of simple 2-stream exchangers, we propose a mixed-integer nonlinear programming (MINLP) formulation to obtain a HE network that best represents the MSHE operation. We also develop an iterative algorithm to solve the large and nonconvex MINLP model in reasonable time, as existing commercial solvers fail to do so. Finally, we demonstrate the application of our work on an MSHE from an existing LNG plant, and successfully predict its performance over a variety of seasons and feed conditions. © 2008 American Institute of Chemical Engineers.
Source Title: AIChE Journal
URI: http://scholarbank.nus.edu.sg/handle/10635/89661
ISSN: 00011541
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

52
checked on Feb 27, 2018

WEB OF SCIENCETM
Citations

46
checked on Apr 16, 2018

Page view(s)

33
checked on Dec 7, 2018

Google ScholarTM

Check


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.