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Faisabilité du recours aux batteries gravitaires dans le secteur résidentiel : étude de cas.

Feasibility of gravity batteries in residential homes: a case study.

Numéro : 3479

Auteurs : JARAUSCH C. L., AVERY T. B., SETIAWAN E., HOESS A. J., LIU H., GROLL E. A.

Résumé

Sustainable energy generation and storage are key factors in the transformation of society towards a carbon-free future. While great progress has been made in the development of renewable energy generation systems, there is still a mismatch between the global energy supply and demand. Renewable energy sources, such as solar and wind energy, are subject to variable efficiencies that depend heavily on local weather conditions. Thus, energy storage is necessary for a sustainable energy grid to meet the demand of high usage phases during periods of lower energy production. Although many systems currently depend on chemical batteries for energy storage, these systems face issues regarding the limited availability of materials needed for fabrication as well as the energy intensive production and recycling processes tied to such systems. Thus, the feasibility, scalability, and use cases of simplified and environmentally friendly alternative energy storage options must be investigated. Subsequently, a feasibility study on the use of a gravity battery as a form of domestic energy storage was conducted in Purdue University’s DC Nanogrid House, an ongoing project that aims to convert a residential property to run solely on DC power whilst operating predominantly independent of the grid. Gravity batteries store energy in the form of potential by lifting a weight using a motor-winch combination. When needed, the battery is discharged by lowering the weight and utilizing a generator to convert the potential energy back into electricity. This is an attractive form of energy storage for its simplicity and longevity without the need for chemical components. In the present paper, the energy consumption data of the DC Nanogrid House was first analyzed to set goals for the required storage capacity of the system, followed by the development of an initial design that was later modeled using CAD. This design went through a techno-economic analysis and was optimized to meet the building and safety specifications. The case study and the techno-economic analysis performed were all used in determining that while gravity batteries continue to show great promise in industry, the insufficient volumetric energy density and efficiency of the systems make the technology currently unviable to be effectively utilized on the residential scale.

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Pages : 10 p.

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Détails

  • Titre original : Feasibility of gravity batteries in residential homes: a case study.
  • Identifiant de la fiche : 30032927
  • Langues : Anglais
  • Source : 2024 Purdue Conferences. 8th International High Performance Buildings Conference at Purdue.
  • Date d'édition : 15/07/2024

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