Simultaneous diagnosis and retrofit of heat exchanger network via individual process stream mapping

Lai, Yee Qing; Manan, Zainuddin Abdul; Alwi, Sharifah Rafidah Wan

doi:10.1016/j.energy.2018.05.021

Cited by 24 publications

(1 citation statement)

References 16 publications

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“…While conventional PA based tools provide insights and idealised target values according to which economic HEN and utilities are to be planned, they have limitations in retrofit situations for improving the efficiency of a HEN. Heat retrofits attempt to resolve Pinch violations in the HEN, primarily through removing cross-Pinch heat transfer [21]. Many existing plants, however, have substantial cross-Pinch heat transfer but struggle to identify a series of cost-effective retrofits [22].…”

Section: Retrofit Approachesmentioning

confidence: 99%

Heat Pump Bridge Analysis Using the Modified Energy Transfer Diagram

et al. 2020

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Heat pumps are the key technology to decarbonise thermal processes by upgrading industrial surplus heat using renewable electricity. Existing insight-based integration methods refer to the idealised Grand Composite Curve requiring the full exploitation of heat recovery potential but leave the question of how to deal with technical or economic limitations unanswered. In this work, a novel Heat Pump Bridge Analysis (HPBA) is introduced for practically targeting technical and economic heat pump potential by applying Coefficient of Performance curves into the Modified Energy Transfer Diagram (METD). Removing cross-Pinch violations and operating heat exchangers at minimum approach temperatures by combined application of Bridge Analysis increases the heat recovery rate and reduce the temperature lift to be pumped at the same time. The insight-based METD allows the individual matching of heat surpluses and deficits of individual streams with the capabilities and performance of different market-available heat pump concepts. For an illustrative example, the presented modifications based on HPBA increase the economically viable share of the technical heat pump potential from 61% to 79%.

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Section: Retrofit Approachesmentioning

confidence: 99%