The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 19, 2013
Filed:
May. 09, 2007
Alfred Rufer, Villars-sous-Yens, CH;
Daniel Favrat, Epalinges, CH;
Philippe Barrade, Chavannes-Renens, CH;
Sylvain Lemofouet, Romanel-sur-Lausanne, CH;
Alfred Rufer, Villars-sous-Yens, CH;
Daniel Favrat, Epalinges, CH;
Philippe Barrade, Chavannes-Renens, CH;
Sylvain Lemofouet, Romanel-sur-Lausanne, CH;
Ecole Polytechnique Federale de Lausanna (EPFL), Lausanne, CH;
Abstract
Different types of energy storage systems are described, in particular hydro-pneumatic storage systems. In one, energy is stored by compressing gas in a chamber () with a liquid piston and released by gas expansion. A spray head or grid at the top of the chamber () supplies liquid as a shower through the gas being compressed or expanding in the cylinder () to maintain an isothermal condition. In another, energy is stored from an array of solar cells connected to an array of supercapacitors forming an auxiliary storage, and a main energy storage device such as a hydro-pneumatic storage system, for supply to an AC or DC network. The efficiency is improved by connecting the solar cells via the array of supercapacitors to the AC or DC network. An immersed hydro-pneumatic storage device for off-shore/on-shore power generation systems comprises a cylinder that is immersed in a liquid mass, wherein energy is stored by compressing gas with a liquid piston and energy is released by gas expansion. The mass of liquid maintains an isothermal condition in the cylinder during compression and expansion.