Organic working fluids

Details Organic working fluids Organic working fluids

2007-05-29

2010-11-02

Nguyen, Hoang M (Department: 3748)

Power plants

Motive fluid energized by externally applied heat

Process of power production or system operation

C060S671000

Reexamination Certificate

active

07823386

ABSTRACT:
The present invention provides an improved, commercially available organic working fluid, which is operable under a broad range of temperatures, is thermally stable, has a high auto-ignition temperature, low freezing point and high critical temperature and is benign to the environment, and safe for human use. Such an organic working fluid is useful in organic Rankine cycle (ORC) power plants or units and other systems of the like as an intermediate fluid for heat-recovery wherein heat from various heat sources is transferred using the intermediate fluid to a further working fluid and converted into work, and the intermediate fluid is also exploited to produce electricity. Such organic working fluids are also operable as heat transfer fluids either in ORC power plants or units or in other heat transfer systems. For this purpose the present invention presents a working fluid comprising at least one highly branched, heavy iso-paraffin hydrocarbons, or a mixture of two or more of such hydrocarbons. Preferably, at least one highly branched iso-paraffin hydrocarbon is present as the major component (i.e. at least 50°% by volume) in the working fluid. A preferred subclass of the class of the branched iso-paraffins which are suitable to be incorporated in organic working fluids of the present invention includes 8 to 20 carbon atom-containing hydrocarbons having at least one methyl radical (CH3) arranged to achieve a highly stable compound.

REFERENCES:
patent: 2404927 (1946-07-01), Schmerling et al.
patent: 3040528 (1962-06-01), Tabor et al.
patent: 3648456 (1972-03-01), Bechtold et al.
patent: 3865896 (1975-02-01), McCoy et al.
patent: 4760705 (1988-08-01), Yogev et al.
patent: 6518321 (2003-02-01), O'Rear et al.
patent: 6571548 (2003-06-01), Bronicki et al.
patent: 6598397 (2003-07-01), Hanna et al.
patent: 6806087 (2004-10-01), Kibby et al.
patent: 6960839 (2005-11-01), Zimron et al.
patent: 6977225 (2005-12-01), Iyer et al.
patent: 7225621 (2007-06-01), Zimron et al.
patent: 2005/0109387 (2005-05-01), Marshall
N. S. Christopher, et al., “Closed Cycle Vapor Turbogenerator—A Reliable Remote Prime Power Source”, International Telecommunications Energy Conference, 2 cover pages and pp. 443-449 (Oct. 1982).
D. Tracy, “Considerations for evaluating, maintaining pipe line coatings”, Pipe Line and Gas Industry (Aug. 1997).
W. Frichtl, “Two Decades of Security Along TransAlaska Pipeline”, Pipeline and Gas Journal, 4 pages (Jul. 1997).
U.S. Appl. No. 12/045,454, filed Mar. 10, 2008, Batscha, et al.

Affiliated with

Also associated with

Rating

Organic working fluids does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Organic working fluids, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Organic working fluids will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4184168