Power plant using CO.sub.2 as a working fluid
US4765143A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 4, 1987 |
| Grant date | Aug 23, 1988 |
| Priority date | — |
| Expiry date | Feb 4, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E20/16
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A system for storing electrical energy in the form of triple-point CO.sub.2 and then using such stored energy plus heat to generate electrical power. A reservoir of carbon dioxide liquid at about the triple point is created in an insulated vessel. Liquid carbon dioxide is withdrawn and pumped to a high pressure, which high pressure carbon dioxide is heated and expanded to create rotary power which generates electrical power. The discharge stream from the expander is cooled and returned to the vessel where carbon dioxide vapor is condensed by melting solid carbon dioxide. A fuel-fired gas turbine connected to an electrical power generator can be used to heat the high pressure carbon dioxide, and an ambient air stream flowing toward the gas turbine can be cooled by giving up heat to the high pressure carbon dioxide stream. The returning expanded carbon dioxide stream can be returned to a separate auxiliary vessel, and liquid carbon dioxide pumped from such auxiliary vessel to a main vessel wherein solid carbon dioxide is formed and then transferred to the auxiliary vessel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.