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Increasingly strict environmental and product-quality regulations coupled with the change of crude oil to high-sulfur and heavier oil have increased refineries' hydrogen demand. Various HNI (hydrogen network integration) methods have been used to achieve efficient use of hydrogen by refineries, leading to reduced energy consumption and cost. However, to minimize the energy consumption of a hydrogen...
On the grand composite curve of a heat exchange network, a heat pocket exists when a local heat source above the pinch point or a local heat sink below the pinch point appears. In this paper, heat recovery in the heat pocket is presented by combining the pinch technology and exergy analysis. When the heat pocket is big, hot streams in the pocket can be used to generate a higher level utility, and...
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