Alloy selections in high-temperature metal hydride heat pump systems for industrial waste heat recovery

Journal article


Ge, Y. and Lang, P. (2022). Alloy selections in high-temperature metal hydride heat pump systems for industrial waste heat recovery. Energy Reports. 8, p. 3649–3660. https://doi.org/10.1016/j.egyr.2022.02.279
AuthorsGe, Y. and Lang, P.
Abstract

In an energy intensive industrial site such as a steel plant, there are plenty of medium and low temperature waste heat which could be recovered for heating purposes with advanced and feasible technologies for example metal hydride (MH) heat pumps. Compared to other heat pump systems such as those with compression and absorption cycles, the MH heat pump has some distinctive advantages including low carbon system in terms of less electricity input and environmentally friendly working mediums, compactness, and most importantly achievable heat output with relatively high temperature. However, the applicable alloys for the high-temperature MH heat pump systems are critical and need to be purposely selected. Accordingly, in this paper, a comprehensive procedure to select alloys for the high-temperature MH heat pump systems is explained based on the operating temperatures, system efficiencies and thermodynamic equilibriums. From the database of literatures, totally 82 alloys are potentially used for this special application of which 1560 alloy pairs are formed and each pair consists of one high-temperature alloy and another low-temperature alloy. Subsequently, a number of applicable alloys are selected for each designed temperature of heat pump output and one pair is ultimately finalised. The alloy can be further examined considering of its thermophysical properties, heat transfer behaviours, costs and safety issues.

KeywordsWaste heat recovery ; High-temperature metal hydride (MH) heat pumps; Alloy selections; System efficiencies
Year2022
JournalEnergy Reports
Journal citation8, p. 3649–3660
PublisherElsevier
Digital Object Identifier (DOI)https://doi.org/10.1016/j.egyr.2022.02.279
Web address (URL)https://www.sciencedirect.com/science/article/pii/S2352484722005273?via%3Dihub
Publication dates
Print15 Mar 2022
Publication process dates
Accepted25 Feb 2022
Deposited04 Apr 2022
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