Economic dispatch optimization of a metal hydride storage system for supplying heat and electricity in a residential application

Muñoz, Carlos; Reininghaus, Nies; Puszkiel, Julián; Pistoor, Astrid; Kroener, Michael; Dyck, Alexander; Vehse, Martin; Klassen, Thomas; Jepsen, Julian

doi:10.1016/j.ecmx.2026.101579

Economic dispatch optimization of a metal hydride storage system for supplying heat and electricity in a residential application

Publication date

2026-01-21

Document type

Forschungsartikel

Author

Muñoz, Carlos

Reininghaus, Nies

Puszkiel, Julián

Pistoor, Astrid

Kroener, Michael

Dyck, Alexander

Vehse, Martin

Klassen, Thomas

Jepsen, Julian

Organisational unit

Werkstoffkunde

Angewandte Werkstofftechnik

DTEC.bw

DOI

10.1016/j.ecmx.2026.101579

URI

https://openhsu.ub.hsu-hh.de/handle/10.24405/23734

Scopus ID

2-s2.0-105028355632

Publisher

Elsevier

Series or journal

Energy Conversion and Management: X

ISSN

2590-1745

Periodical volume

30

Article ID

101579

Peer-reviewed

✅

Part of the university bibliography

✅

Language

English

Keyword

Cost minimization

Economic dispatch

Household

Metal hydride

Optimization

Sector integration

System modeling

dtec.bw

Abstract

To achieve affordable, clean energy, incorporating renewable energy into existing energy systems is the key. One challenge is the fluctuating nature of renewable resources, which can be asynchronous with energy demands. Hydrogen storage, particularly metal hydride storage, is a favorable solution for balancing supply and demand. In particular, metal hydride storage, compared with pressurized or liquefied hydrogen storage, is a favorable technology choice due to its storage energy density (50-100 kg H˙2/m³) and its low operating temperature and pressure. This paper presents a simulation-based framework to investigate the optimal design and operation of a coupled Electrolyzer-Fuel Cell-Metal Hydride system (SET-Unit) for minimizing operational and capital expenses in a residential application. The results show that integrating heat pumps with a metal-hydride storage system and photovoltaics can achieve 83% energy self-sufficiency and a 7.1-year payback period. Combining SET-Unit, gas boilers, and photovoltaics can result in 28% energy self-sufficiency, annual savings of over 2221 EUR, and a payback period of 7.4 years. The SET-Unit, combined with renewable energy sources such as photovoltaics, and the in-market available gas boilers or heat pumps, shows benefits in efficiency, annual energy cost reduction, and a relatively short payback period for the household. Using the low end of published values for capital expenses, economic feasibility can be achieved.

Description

This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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