Exact(23)
It successfully finds the minimum needs of hot and cold utilities stratified according to their temperature levels.
With only few modifications additional 9% of hot utilities and 5% of cold utilities savings are possible.
The operating pinch procedure was used to estimate the consumption of hot and cold utilities for non-integrated process.
Also, it is shown that the use of minimum amounts of cold utilities does not necessarily conduct to the minimum total cost.
For the case study, the hot and cold utilities are reduced by 61.5% and 20.6% compared to energy consumptions for the base case.
It is shown that optimal integrated process consumes 45% of hot and 30% of cold utilities required by non-integrated process.
Similar(37)
By using this diagram, it can be achieve to the concepts such as: 1- retrofit of the HEN for energy saving, 2- the best location of hot and cold utility, 3- The actual amount of required hot and cold utility.
On the other hand, cold utility streams are composed into a cold UCC that comprises energy outflows and energy consumption (energy acceptors).
Combining every exchanger minimized cost with the cost of hot utility and cold utility gives the total cost of the HEN for a particular ΔTmin.
In the PSD process, the bottom stream is heated by hot utility in reboiler and the vapor stream is condensed by cold utility in condenser.
To demonstrate this, energy targeting through conventional pinch analysis leads to 7.74 MW and 13.00 MW of hot and cold utility energy demand, respectively.
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