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Definition of a Robustness Indicator for Assessment of Heat Exchanger Network Performances

Payet, Lucille and Théry Hétreux, Raphaële and Hétreux, Gilles and Floquet, Pascal Definition of a Robustness Indicator for Assessment of Heat Exchanger Network Performances. (2017) Computer Aided Chemical Engineering, 40. 1813-1818. ISSN 1570-7946

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Official URL: https://doi.org/10.1016/B978-0-444-63965-3.50304-4

Abstract

Due to process variabilities and operational modifications, operation parameters of the HEN may alter its output temperatures. Flexibility of HEN refers to the ability of a system to operate for a finite number of points. The first level of flexibility concerns the robustness (ability of the system to absorb disturbances without changing utility flowrates). Assuming that some parameters p vary with a normal distribution characterized by its mean value pmean and standard deviation psd, a linear system is solved where the left-hand term involves matrices representing the HEN (fluctuations of the HEN characteristics, except topology) and right-hand side involves fluctuations of input temperatures of the HEN. Due to this linear formulation, the normally distributed inputs also propagate along a normal distribution output temperatures. A robustness criterion is then defined evaluating the probability of a selected critical value output distribution to fall within a predefined interval. This robustness criterion can only be significant when a thorough data analysis is carried out to identify the relevant perturbations and their frequency of occurrence.

Item Type:Article
HAL Id:hal-01886952
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
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Deposited By: Loetitia MOYA
Deposited On:03 Oct 2018 11:57

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