Pinch Analysis involves an analysis of the potential maximum heat recovery for a process.

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The minimum approach temperature difference (DT_min) between composite curves influences the heat transfer area, and the operating cost of a process.

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The DT_min should be as small as possible to ensure that energy saving can be maximised and to maintain an overall process profitability.

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The sum of heat excess (heat surplus) minus sum of heat demands equals the minimum energy targets for a process.

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The shifted temperature interval is used to factor in energy losses from hot and cold composites

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Setting the minimum energy target using Problem Table Analysis (PTA) is a process getting the overall sum of net enthalpies throughout temperature intervals.

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In the PTA, a negative heat flow across temperature intervals will give the hot utility target.

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If there exist energy surplus at a lower temperature interval, it is good to use it to satisfy energy demand at a higher temperature interval.

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Heat can be transferred from low temperature to a high temperature, with the aid of energy.

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Knowing the Pinch Point allows engineers to identify if there are suboptimal heat exchange within a process.

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