Storage of electrical energy with thermal storage and return through a thermodynamic cycle

US8938966B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Tobias Jockenhoevel · Koblenzer Straße, DE
• Norbert König · Augsburg, DE
• Rainer Nies · Erlangen, DE
• Nicolas Vortmeyer · Essen, DE
• Erik Wolf · Schkölen, DE

Key dates

• Filing date: Mar 5, 2009
• Grant date: Jan 27, 2015
• Expiry date: May 20, 2032

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E20/16
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A device and a method for using overcapacities in the power grid is provided. In case of an oversupply of energy, the energy is transferred to a thermal storage device directly via a heating element and in the discharge case of the thermal storage device the heat is removed from the thermal storage device and made available to a thermodynamic cycle whereby electrical energy is produced. The heat from the thermal storage device is used to preheat air in an air feed line to a combustion chamber, or fuel is pre-heated using heat from the thermal storage device.