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:
Jun. 25, 2013
Filed:
Apr. 01, 2010
Lalit Chordia, Pittsburgh, PA (US);
John C. Davis, Pittsburgh, PA (US);
Lalit Chordia, Pittsburgh, PA (US);
John C. Davis, Pittsburgh, PA (US);
Thar Geothermal, Inc., Pittsburgh, PA (US);
Abstract
A geothermal energy system with reverse thermodynamic flow scheme that employs a pump or a compressor in series with a ground heat rejection or a ground heat absorber. The pumped geothermal energy system evaporates and condenses the working fluid at substantially the same pressure in the ground loop. The working fluid could be carbon dioxide, Freon, water or any other suitable refrigerant. The compressive geothermal system condenses the working from a vapor to a liquid above, below, and substantially equal to critical pressure using carbon dioxide as the working fluid.