Assessment of power-to-power renewable energy storage based on the smart integration of hydrogen and micro gas turbine technologies. (8th May 2022)

• Record Type: Journal Article
• Authors: Escamilla, Antonio; Sánchez, David; García-Rodríguez, Lourdes
• Is Part Of: International journal of hydrogen energy. Volume 47:Number 40(2022)
• Page Start: 17505
• Page End: 17525
• Publication Date: 2022-05-08
• Subjects: Power-to-Power -- Micro-gas turbines -- Renewable hydrogen -- Energy storage systems; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2022.03.238
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: Power-to-Power is a process whereby the surplus of renewable power is stored as chemical energy in the form of hydrogen. Hydrogen can be used in situ or transported to the consumption node. When power is needed again, hydrogen can be consumed for power generation. Each of these processes incurs energy losses, leading to a certain round-trip efficiency (Energy Out/Energy In). Round-trip efficiency is calculated considering the following processes; water electrolysis for hydrogen production, compressed, liquefied or metal-hydride for hydrogen storage, fuel-cell-electric-truck for hydrogen distribution and micro-gas turbine for hydrogen power generation. The maximum achievable round-trip efficiency is of 29% when considering solid oxide electrolysis along with metal hydride storage. This number goes sharply down when using either alkaline or proton exchange membrane electrolyzers, 22.2% and 21.8% respectively. Round-trip efficiency is further reduced if considering other storage media, such as compressed- or liquefied-H2 . However, the aim of the paper is to highlight there is still a large margin to increase Power-to-Power round-trip efficiency, mainly from the hydrogen production and power generation blocks, which could lead to round-trip efficiencies of around 40%–42% in the next decade for Power-to-Power energy storage systems with micro-gas turbines. Highlights: Round-trip e_ciency of P2P energy storage system with micro gas turbines between 22% and 29%. . Literature review of hydrogen electrolysis systems available in the market. Thermodynamic analysis of H2 compression with a speci_c energy consumption of around 10% of H2 energy content. Hydrogen storage in high-pressure vessels, lique_ed and in metal hydrides. Hydrogen transportation by Fuel Cell Electric Truck for an average distance of 200 km per trip.