(106g) Ensuring Process Safety of Heat Exchanger Networks Under Uncertainty
AIChE Annual Meeting
2021
2021 Annual Meeting
Computing and Systems Technology Division
Advances in Process Design
Monday, November 8, 2021 - 2:00pm to 2:15pm
We further extend the HEN synthesis to account for the uncertainty of SR predictions. This uncertainty is assumed to be in the form of pressure variations across a HENâs streams. These uncertainties, which are common during normal operation, can lead to lower SR values. If left unaccounted for, the SR minimum threshold originally proposed may not perform as expected in a plant setting and instead give a false sense of security. As the SR is itself a function of pressure, we use a robust counterpart of the safety constraint to tackle the worst-case scenario and ensure that the designed HEN can tolerate a certain level of variance that may be present in a plant. One benefit of this approach is that plants could use historical operating data to assume a level of variance and subsequently determine the most cost effective HEN configuration. We will demonstrate the overall safety-ensured HEN synthesis framework using several case studies.
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