|Publication number||US3736745 A|
|Publication date||Jun 5, 1973|
|Filing date||Jun 9, 1971|
|Priority date||Jun 9, 1971|
|Publication number||US 3736745 A, US 3736745A, US-A-3736745, US3736745 A, US3736745A|
|Original Assignee||Karig H|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (7), Referenced by (94), Classifications (11)|
|External Links: USPTO, USPTO Assignment, Espacenet|
United States Patent Karig 1 1 June 5, 1973 s41 SUPERCRITICAL THERMAL POWER 3,237,403 3 1966 Feher ..60/36 SYSTEM USING COMBUSTION GASES 3,324,652 6/1967 Msollet v.60 36 2,756,215 7/1956 BllIgCSS et al. ..60/39.52
 Inventor: Horace E. Karig, La Jolla, Calif. primary E A1 Lawrence s i h  Assignee: The United States of America as Assistant Examiner-warren Olsen represented by the Secretary of the Navy, Washington, DC.
Attorney-Richard S. Sciascia, Ervin F. Johnston and Thomas G. Keough  Filed: June 9, 1971  ABSTRACT  Appl. No.: 151,331 A supercritical thermal power system including components conventionally included in a Rankine cycle, uses a portion its own combustion gases as its only  U.S. Cl. ..60/39.02, 60/3952, 606/37396, working fluid The System recirculates a the bustion gases, cools them, and purges the excess 12;] amounts from the system. The cooled remainder pop 1 0 6 1 tion is reheated to conserve energy and mixed with oxygen and fuel in the combustion chamber to lower the temperature of the burning gases to pass cooler com-  References C'ted bustion gases to a turbine for minimizing failure other- UNITED STATES PATENTS wise due to excessive heat in the system. By using a portion of the system s own combustion gases as the 3,559,402 2/1971 Stone et al ..60/279 onl working fluid, the systems overall efficiency is 2,895,291 7/1959 Lewis et significantly increased over contempory systems. 2,884,912 5/1959 Lewis .....123/119 A 3,220,191 11/1965 Berchtold ..60/36 8 Claims, 2 Drawing Figures smsu: 1
STAGE LOAD COMBUSTlON TURBINE I CHAMBER 3000 PSIA I l l3I5F 3020 PSIA |445F V I 1500 PSlA l |2 CONDENSER il b 3 REGENERATOR 12:: 125F I30 I 85F 14 I 68F 3050 PSIA I450 PSIA PATENIEDJux 51915 3.736. 745
SHEETIDFZ SINGLE STAGE LOAD TURBINE COMBUSTION CHAMBER 3000 PSIA l3l5F 3020 PSIA ISOOPSIA 13 couoenssn REGENERATOR m 1 l25F V ,l 850 F 3050 PSIA F I450 PSIA l5 INVENTOR.
HORACE E. KARIG ATTORNEYS IATENIEDJUH 5 I975 3. 736. 745
SHEET 2 0F 2 3050 PSIA ms PSIA REGENERATOR K 85F 3020 PSIA COMBUSTION CHAMBER 3000 PSIA I500 PSIA F 3050 PSIA CONDENSER I30 SINGLE I450 PSIA STAGE LOAD TURBINE l3b L IS INVENTOR.
HORACE E. KARIG THOMAS GLENN KEOUGH ERVIN F. JOHNSTON ATTORNEYS SUPERCRITICAL THERMAL POWER SYSTEM USING COMBUSTION GASES FOR WORKING FLUID STATEMENT OF GOVERNMENT INTEREST The invention described herein may be manufactured and used by or for the Government of the United States of America for governmental purposes without the payment of any royalties thereon or therefor.
BACKGROUND OF THE INVENTION A wide variety of thermal power systems operating generally within a Carnot cycle have been developed throughout the years. One notable example is the Walter engine which called for the direct combustion of hydrogen peroxide and diesel oil in a combustion chamber and feeding the combustion gases through a prime mover to effect an energy conversion. A disadvantage of the Walter engine resided in its having to tolerate the hot combustion gases being directly fed into the prime mover. Since the gases by being so hot tended to damage the prime mover, water was sprayed into the combustion chamber to bring the combustion temperature within a workable range; however, the heat required to evaporate'the cooling water seriously degraded the systems efficiency. In addition, the Walter engine, an open-cycle system required that the exhaust gases be pumped out of the system. This creates considerable design difficulties, especially where the ambient pressure is high, as is the case at great depths in the ocean. An alternate system approach is to design a closedcycle power system using a secondary recirculating fluid for effecting a power transfer when it is heated by combustion gases in a boiler-like chamber. An immediate disadvantage of this approach is apparent since a relatively inefficientheat transfer occurs as the gases heat the secondary recirculating fluid to seriously lower this systems overall efficiency. An attempt to raise the efficiency in a closed-cycle system has been proposed by Ernest G. Feher in US. Pat. No. 3,237,403 issued Mar. 1, 1966 in his Supercritical Cycle Heat Engine. This heat engine used CO at supercritical temperatures and pressures as the secondary recirculating fluid to function as the working fluid in a modified Rankine cycle. The advantages of employing carbon dioxide as the working fluid at its supercritical temperature and pressure levels are disclosed and thoroughly explained in the Feher Patent and this publication provides a nearly complete background for a thorough understanding of the'present invention. However, with the Feher approach, a serious loss of efficiency burdens the engine which is created at the heat transfer interface between the heater element and the recirculating C The Feher engine does not directly use the combustion gases to drive the turbine but rather relies on a conventional heat exchange in a heater for system power. Here again, direct employment of uncooled combustion gases as the working fluid in a turbine has been avoided due to the combustion gases high temperature which causes heat damage to the turbine.
SUMMARY OF THE INVENTION The present invention is directed to providing a supercritical thermal power system using its combustion gas as its only working fluid and includes a turbine receiving the combustion gas to provide an energy conversion. A regenerator and condenser receive the combustion gas expelled from the turbine and condense the excess amounts of water vapor and CO to either expel or to store them. While passing through the regenerator in the opposite direction, the residue of the carbon dioxide is raised above its critical temperature and assumes the gaseous state. The gaseous residue is fed to a combustion chamber where oxygen and a distillate fuel are being burned to form more combustion gas. In the chamber the gaseous residue is mixed with the burning oxygen and fuel to cool the resultant combustion gas which is vented to drive the turbine. Directly employing the combustion gases as the working fluid results in a higher overall system efficiency and by mixing the gaseous residue with the burning oxygen and fuel, the temperature of the combustion gases is lowered to prevent heat damage to the turbine.
A prime object of the invention is to provide a thermal power system having a higher overall system efficiency.
Another object is to provide a thermal power system using its combustion gases as its only working fluid.
Still another object is to provide a system using recirculating combustion gases comprised mostly of CO: at supercritical temperatures as its working fluid.
Yet another object is to provide a closed thermal power system designed to store its combustion byproducts.
Still another object is to provide a closed thermal power system having a high discharge pressure to overcome ambient pressures found at extreme ocean depths.
A further object is to provide a thermal power system burning low-cost hydrocarbon fuel and oxygen at low temperatures not requiring elaborate heat exchangers or feed water injectors.
Still another object is to provide a thermal power system of small size yet having a high overall efficiency.
These and other objects of the invention will become more readily apparent from the ensuing description when taken with the drawings.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic representation of one embodiment of the invention.
FIG. 2 is a schematic representation of another embodiment of the invention.
DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings, two representative thermal power systems are depicted each embracing the heart of the present invention, that being, using the combustion gas as its only working fluid to effect an energy conversion. In both of these systems the specific temperatures and pressures discussed in the specification and appearing on the drawings are for purposes of demonstrating specific embodiments. If different efficiencies are tolerable, then variation from the identified temperatures and pressures is permissible within the teachings of the invention.
A turbine 10, preferably a single stage turbine, is assembled to allow a low gas expansion ratio and is capable of operating at high efficiency over a wide operating range to convert heat energy to rotary motion. The turbine receives combustion gases at 3000 PSIA and 1600 F., exacts an energy conversion, and vents or exhausts them at 1500 PSIA and at 1445 F. A mechanically interconnected load 11 converts the turbines rotary motion to electrical power, or whatever other energy conversion desired, and a mechanical linkage 11a extends to another system component, the purpose of which will be elaborated on below.
Exhausted combustion gases are received by a regenerator 12 which cools the exhausted gases to approximately l25 F and vents them to its downstream side. Within a cross duct 12a in the regenerator the exhausted combustion gases are maintained above the critical 87 F. temperature of CO to retain the CO portion of the combustion gases in its gaseous state. However, within the cross duct, water vapor, formed as a by-product of burning and diffused throughout the combustion gases, is condensed and flows along with the other combustion gases at the duct outlet.
The physical construction of the regenerator optionally assumes one of many of a variety of different configurations. A typical regenerator is no more than an elongate cylinder having a pair of concentrically, coaxially disposed ducts the inner one 112a passing the exhaust gases in one direction and the outer one 12b having a cooler fluid traversing in the other direction, as will be explained later, to cause the desired temperature drop in the exhaust gases.
Following the regenerator, a coil 13a in a condenser 13 receives the cooled combustion gases, now lowered to the 125 F. temperature at approximately 1450 PSIA pressure. A sufficient quantity of sea water is pumped through another coil 13b in the condenser to perform a direct conductional cooling of the combustion gases bringing the carbon dioxide below its critical temperature of 87 F. Because CO pressurized to 1100 PSIA, or greater, undergoes a direct change of state from gaseous form to liquid form, or vice versa, when brought to its critical temperature of 87 F., the carbon dioxide in the present system, being under a pressure of approximately 1450 PSIA, undergoes a direct transition to change from the gaseous state to the liquid state. Such an immediate change in state takes place in the condenser by the heat transfer occurring between the carbon dioxide in condenser coil 13a and the sea water in condenser coil 13b.
Having liquid CO and liquid water in the system downstream from coil 13a permits the purging of carbon monoxide or other noncondenseable gases also created as by-products of the burning process. A simple valve arrangement 14 allows purging and disposal of these by-products to increase the systems overall efficiencies. In addition, when the amounts of water vapor and carbon dioxide created during burning are beyond the quantity needed for maintaining a suitable level of working fluid this excess amount of the liquid form of the combustion gas is vented at this point. For more efficient operation, most of the water is purged to retain carbon dioxide as the systems major working fluid.
With the remainder of the combustion gases, that portion not being vented off at valve 14, still in the systern, a pump 15 draws it in at 1450 PSIA pressure at 68 F. The pump increases the remainders pressure to 3050 PSIA and slightly raises its temperature to 85 F. Although the temperature of the remaining gases, optionally, is raised above the critical 87 F. temperature in the pump to convert it to the gaseous state, system efficiency was enhanced by feeding it back through regenerator 12 via the above mentioned longitudinal duct 12b.
The heat transfer between the combustion gases vented from the turbine through longitudinal duct 12a and the remainder of combustion gas passing through longitudinal duct 12b is mutually beneficial to both fluids. The hot gases in duct 12a are cooled by the liquid remainder in duct 12b to condense water vapor and to lower their temperature. Simultaneously, the liquid remainder in duct 12b is heated above and beyond its critical temperature to change to the gaseous state and to raise the remainders temperature to approximately l3l5 F. at 3020 PSIA. Thusly, the heated remainder has been appropriately preprocessed to be recirculated and recycled back to a combustion chamber 16.
The combustion chamber is connected to receive oxygen and a distillate fuel from a source of oxygen 17 and a source of fuel 18. Suitable valving is provided to ensure that the proper volumes of each are fed to the combustion chamber for complete burning.
Since the stoichiometric burning of diesel oil, for example, in oxygen produces a burning temperature of approximately 6000 F., most combustion chambers are unable to contain such a high temperature, with the exception of heavy, massive chambers made of substantial volumes of high refractory materials. In the present invention, to lower the internal temperature of the combustion chamber, the remainder of the combustion gases of the previous cycle are recycled back into the combustion chamber to mix with the burning oxygen and fuel. Further protection of the chamber from overheating is ensured by directing the flow of recycled gas to line the chamber inner walls insulating them from the flames. The temperature of combustion is significantly reduced by the recycled remainder and the temperature of the burning combustion gases is brought considerably below that temperature which causes damage to the chamber and the following turbine. Since temperatures in excess of 3000 F. may cause heat damage to a stainless steel coaxial boiler or a conventional turbine, bringing the gases ducted to the turbine to a temperature of 1600 F. at 3000 PSIA, leaves an adequate margin of safety. Thus, by the mixing action of the remainder of the combustion gases of the preceding cycle with the burning oxygen and fuel, the overall thermal efficiency of this system is measured to approach 42 percent, far above the efficiencies reached by contemporary systems calling for the injection of water coolants in the combustion chamber.
By prepressurizing the system with carbon dioxide at approximately 1450 PSIA and including a mechanical linkage 11a, shown in phantom between loadll and pump 15, the system is readied for immediate operation.
A modification of the aforedescribed system is shown in FIG. 2 which, in addition to having the components already identified, includes a water separator is connected on the downstream side of longitudinal duct 12a. The water separator passes condensed water at 1475 PSIA and F. to a water storage compartment separated from the fuel oil in source 18 by a flexible wall 18a. The pressurized condensed water acting on the flexible wall tends to force the remaining volume of fuel oil into the combustion chamber at a high flow rate. A metering pump 18b is desirably included to precisely regulate the fuel flow to the combustion chamber.
In a similar manner, a feeder line on the downstream side of pump 15 feeds excess liquified CO to a C0 storage tank 20 and also to a bank of bottles representing oxygen source 17. As oxygen is used and the bottles become empty, excess CO is stored by merely opening an ingress valve 17a and shutting an egress valve 17b. Here again, a metering pump 17c allowing the selective change from one oxygen bottle to the other and for regulating the bottle s flow rate is highly desirable to ensure reliable system operation.
An advantage of storing the recovered products of combustion in, for example, a submersible where precise bouyancy and trim control are important, becomes apparent when it is noted that the energy-transfer process imparts no gain or loss of weight making weight or trim compensation unnecessary.
Obviously, many modifications and variations of the present invention are possible in the light of the above teachings, and, it is therefore understood that within the scope of the disclosed inventive concept, the invention may be practiced otherwise than specifically described.
What is claimed is:
l. A supercritical thermal power system producing and using a portion of its composite combustion gas as its only working fluid comprising:
a regenerator having a first duct and a second duct receiving said combustion gas in said first duct at a first pressure and a first temperature for venting said combustion gas at a reduced second pressure and second temperature while providing an energy conversion said first pressure and said second pressure being in excess of 1100 PSIA;
a condenser coupled to said first duct for lowering the temperature of said combustion gas below a critical temperature for effecting an immediate change of state of the carbon dioxide in said combustion gas to a liquid form;
means connected to the said condenser for purging an excess quantity of said liquid form of said carbon dioxide from said system while retaining a remainder of said liquid form in said system;
means joining said condenser to said second duct for increasing the pressure and temperature of the remainder of said liquid form of said carbon dioxide to a value substantially corresponding to said first pressure and to a temperature level above the critical temperature of said liquid form of said carbon dioxide to change the state of said remainder to a gaseous fluid at the output of said second duct;
a source of oxygen;
a source of distillate fuel; and
a combustion chamber connected to the oxygen source, the distillate fuel source, and the output of said second duct, upon feeding said gaseous fluid to said combustion chamber during combustion of said oxygen and said distillate fuel, resultant combustion gases are cooled to a magnitude which prevents heat damage to said system and which ensures higher system efficiency.
2. A system according to claim 1 in which said regenerater passes said combustion gas at said second pressure and said second temperature to effect a partial reduction of temperature of said combustion gas and said condenser is serially connected and water cooled to further reduce the temperature of said combustion gas below the critical temperature of carbon dioxide ensuring its change of state to said liquid form.
3. A system according to claim 2 in which said increasing means includes a pump joined to said second duct, said remainder quantity is changed in state to said gaseous fluid by the heat of said combustion gas at said second pressure and said second temperature, thereby ensuring the raising of the temperature of said gaseous fluid to a level above its critical temperature.
4. A system according to claim 3 in which the purging means includes a water separator having a water feeder line connected to said distillate fuel source for replacing burned fuel with condensed water vapor and said water cooled condenser is provided with a C0 feeder line connected to said oxygen source for replacing burned oxygen with condensed CO rendering said system completely closed with in-system storage of combustion by-products.
5. A method of raising the overall system efficiency of a supercritical thermal power system by using its composite combustion gas as its working fluid comprising:
extracting work from said combustion gas in an energy converter; Y lowering the temperature of said combustion gas below the critical temperature of carbon dioxide; condensing said carbon dioxide to a liquid form; purging excess said liquid form of said carbon dioxide from said system;
raising the temperature of said liquid form of said carbon dioxide to a gaseous form;
mixing said gaseous form of said carbon dioxide in a combustion chamber with a. hot combustion gas created as oxygen and distillate fuel burns in said combustion chamber said gaseous form being cooler than said hot combustion gas to cool the mixed combustion gas;
feeding the mixed combustion gas to said energy converter for preventing heat damage to said energy converter and to raise said overall system efficiency; and
maintaining said combustion gas at supercritical pressure levels throughout said system to further raise said overall system efficiency.
6. A method according to claim 5 further including:
storing said excess said liquid form of said carbon dioxide making said system closed and self contained.
7. A system according to claim 1 in which a heat transfer occurring as said combustion gas has its temperature reduced from said first temperature to said second temperature raises the temperature of the remainder of said liquid form of said combustion gas above the critical temperature of said liquid form of said combustion gas to ensure a change of state to said gaseous form.
8. A system according to claim 7 in which said first temperature is in excess of 1400 F, said first pressure is in excess of 1475 PSIA, said second temperature is in excess of F, said second pressure is in excess of 1425 PSIA and said critical temperature is substantially 87 F.
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US2756215 *||Aug 2, 1950||Jul 24, 1956||Garrett Corp||Method of preparing a substantially dry inert gas useful for inerting spaces|
|US2884912 *||Dec 2, 1948||May 5, 1959||Baldwin Lima Hamilton Corp||Closed cycle method of operating internal combustion engines|
|US2895291 *||Dec 2, 1948||Jul 21, 1959||Baldwin Lima Hamilton Corp||Recycling method of operating for power plants|
|US3220191 *||May 14, 1962||Nov 30, 1965||Escher Wyss Ag||Varying the pressure level of a closed-cycle gas turbine plant|
|US3237403 *||Mar 19, 1963||Mar 1, 1966||Douglas Aircraft Co Inc||Supercritical cycle heat engine|
|US3324652 *||Jul 7, 1965||Jun 13, 1967||Commissariat Energie Atomique||Process and apparatus for power production|
|US3559402 *||Apr 24, 1969||Feb 2, 1971||Us Navy||Closed cycle diesel engine|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US3808805 *||Jun 21, 1972||May 7, 1974||L Miramontes||Process for the conversion of exhaust gases of the internal combustion engines into harmless products|
|US3830062 *||Oct 9, 1973||Aug 20, 1974||Thermo Electron Corp||Rankine cycle bottoming plant|
|US4238925 *||Sep 11, 1978||Dec 16, 1980||Purification Sciences Inc.||Gas turbine system with oxygen vapor-fuel system|
|US4498289 *||Dec 27, 1982||Feb 12, 1985||Ian Osgerby||Carbon dioxide power cycle|
|US4984426 *||Apr 26, 1989||Jan 15, 1991||Santi Giunio G||Closed circuit system for recycling the exhaust gases of a combustion engine|
|US5175995 *||Oct 25, 1989||Jan 5, 1993||Pyong-Sik Pak||Power generation plant and power generation method without emission of carbon dioxide|
|US5177952 *||Mar 1, 1991||Jan 12, 1993||Rockwell International Corporation||Closed cycle power system|
|US5247791 *||Aug 17, 1992||Sep 28, 1993||Pyong S. Pak||Power generation plant and power generation method without emission of carbon dioxide|
|US5300265 *||Jun 26, 1990||Apr 5, 1994||Fluid Dynamics Pty Ltd.||Controlled atmosphere generating equipment|
|US5379728 *||Jun 1, 1993||Jan 10, 1995||Transglobal Technologies, Limited||Fuel supply system for internal combustion engines|
|US5515814 *||Sep 6, 1995||May 14, 1996||Transglobal Technologies, Limited||Apparatus and method for supplying fuel to internal combustion engines|
|US5590519 *||Jul 13, 1993||Jan 7, 1997||Bal Ab||Combined combustion and exhaust gas cleansing plant|
|US5802840 *||Mar 2, 1995||Sep 8, 1998||Crg Kohlenstoffrecycling Ges.Mbh||Process for the low-pollutant conversion of fossil fuels into mechanical power|
|US6170264 *||Feb 13, 1998||Jan 9, 2001||Clean Energy Systems, Inc.||Hydrocarbon combustion power generation system with CO2 sequestration|
|US6196000 *||Jan 14, 2000||Mar 6, 2001||Thermo Energy Power Systems, Llc||Power system with enhanced thermodynamic efficiency and pollution control|
|US6247316||Mar 22, 2000||Jun 19, 2001||Clean Energy Systems, Inc.||Clean air engines for transportation and other power applications|
|US6389814||Dec 20, 2000||May 21, 2002||Clean Energy Systems, Inc.||Hydrocarbon combustion power generation system with CO2 sequestration|
|US6523349||Jun 19, 2001||Feb 25, 2003||Clean Energy Systems, Inc.||Clean air engines for transportation and other power applications|
|US6598398||May 21, 2002||Jul 29, 2003||Clean Energy Systems, Inc.||Hydrocarbon combustion power generation system with CO2 sequestration|
|US6622470||May 14, 2001||Sep 23, 2003||Clean Energy Systems, Inc.||Semi-closed brayton cycle gas turbine power systems|
|US6637183||May 14, 2001||Oct 28, 2003||Clean Energy Systems, Inc.||Semi-closed brayton cycle gas turbine power systems|
|US6824710||May 14, 2001||Nov 30, 2004||Clean Energy Systems, Inc.||Working fluid compositions for use in semi-closed brayton cycle gas turbine power systems|
|US6868677||May 24, 2002||Mar 22, 2005||Clean Energy Systems, Inc.||Combined fuel cell and fuel combustion power generation systems|
|US6898936||Dec 4, 2002||May 31, 2005||The United States Of America As Represented By The United States Department Of Energy||Compression stripping of flue gas with energy recovery|
|US6910335 *||Aug 22, 2003||Jun 28, 2005||Clean Energy Systems, Inc.||Semi-closed Brayton cycle gas turbine power systems|
|US6918253||Jan 11, 2001||Jul 19, 2005||Thermoenergy Power Systems, Llc||Power system with enhanced thermodynamic efficiency and pollution control|
|US6945029||Nov 17, 2003||Sep 20, 2005||Clean Energy Systems, Inc.||Low pollution power generation system with ion transfer membrane air separation|
|US7007474||Dec 4, 2002||Mar 7, 2006||The United States Of America As Represented By The United States Department Of Energy||Energy recovery during expansion of compressed gas using power plant low-quality heat sources|
|US7021063||Mar 10, 2004||Apr 4, 2006||Clean Energy Systems, Inc.||Reheat heat exchanger power generation systems|
|US7043920||Jul 8, 2003||May 16, 2006||Clean Energy Systems, Inc.||Hydrocarbon combustion power generation system with CO2 sequestration|
|US7191587||Oct 31, 2003||Mar 20, 2007||American Air Liquide, Inc.||Hybrid oxygen-fired power generation system|
|US7278267 *||Feb 23, 2005||Oct 9, 2007||Kabushiki Kaisha Toshiba||Steam turbine plant|
|US7882692||Apr 30, 2007||Feb 8, 2011||Clean Energy Systems, Inc.||Zero emissions closed rankine cycle power system|
|US8161748||Mar 1, 2004||Apr 24, 2012||Clearvalue Technologies, Inc.||Water combustion technology—methods, processes, systems and apparatus for the combustion of hydrogen and oxygen|
|US8596075||Aug 31, 2010||Dec 3, 2013||Palmer Labs, Llc||System and method for high efficiency power generation using a carbon dioxide circulating working fluid|
|US8613195||Oct 21, 2011||Dec 24, 2013||Echogen Power Systems, Llc||Heat engine and heat to electricity systems and methods with working fluid mass management control|
|US8616001||Aug 8, 2011||Dec 31, 2013||Echogen Power Systems, Llc||Driven starter pump and start sequence|
|US8616323||Mar 11, 2010||Dec 31, 2013||Echogen Power Systems||Hybrid power systems|
|US8631639 *||Mar 30, 2009||Jan 21, 2014||General Electric Company||System and method of cooling turbine airfoils with sequestered carbon dioxide|
|US8776532||Feb 11, 2013||Jul 15, 2014||Palmer Labs, Llc||Partial oxidation reaction with closed cycle quench|
|US8783034||Nov 7, 2011||Jul 22, 2014||Echogen Power Systems, Llc||Hot day cycle|
|US8794002||Dec 4, 2009||Aug 5, 2014||Echogen Power Systems||Thermal energy conversion method|
|US8813497||Aug 21, 2012||Aug 26, 2014||Echogen Power Systems, Llc||Automated mass management control|
|US8857186||Nov 7, 2011||Oct 14, 2014||Echogen Power Systems, L.L.C.||Heat engine cycles for high ambient conditions|
|US8869531||Nov 28, 2011||Oct 28, 2014||Echogen Power Systems, Llc||Heat engines with cascade cycles|
|US8869889||Sep 19, 2011||Oct 28, 2014||Palmer Labs, Llc||Method of using carbon dioxide in recovery of formation deposits|
|US8959887||Nov 4, 2013||Feb 24, 2015||Palmer Labs, Llc||System and method for high efficiency power generation using a carbon dioxide circulating working fluid|
|US8966901||Oct 3, 2012||Mar 3, 2015||Dresser-Rand Company||Heat engine and heat to electricity systems and methods for working fluid fill system|
|US9014791||Apr 19, 2010||Apr 21, 2015||Echogen Power Systems, Llc||System and method for managing thermal issues in gas turbine engines|
|US9062608||Mar 14, 2013||Jun 23, 2015||Palmer Labs, Llc||System and method for high efficiency power generation using a carbon dioxide circulating working fluid|
|US9062898||Oct 3, 2012||Jun 23, 2015||Echogen Power Systems, Llc||Carbon dioxide refrigeration cycle|
|US9091278||Aug 19, 2013||Jul 28, 2015||Echogen Power Systems, Llc||Supercritical working fluid circuit with a turbo pump and a start pump in series configuration|
|US9115605||Dec 4, 2009||Aug 25, 2015||Echogen Power Systems, Llc||Thermal energy conversion device|
|US9118226||Oct 10, 2013||Aug 25, 2015||Echogen Power Systems, Llc||Heat engine system with a supercritical working fluid and processes thereof|
|US9194340||Aug 29, 2013||Nov 24, 2015||Enhanced Energy Group LLC||Cycle piston engine power system|
|US9316404||Aug 4, 2010||Apr 19, 2016||Echogen Power Systems, Llc||Heat pump with integral solar collector|
|US9341084||Oct 10, 2013||May 17, 2016||Echogen Power Systems, Llc||Supercritical carbon dioxide power cycle for waste heat recovery|
|US9410449||Dec 11, 2013||Aug 9, 2016||Echogen Power Systems, Llc||Driven starter pump and start sequence|
|US9441504||Jun 22, 2010||Sep 13, 2016||Echogen Power Systems, Llc||System and method for managing thermal issues in one or more industrial processes|
|US9458738||Dec 11, 2013||Oct 4, 2016||Echogen Power Systems, Llc||Heat engine and heat to electricity systems and methods with working fluid mass management control|
|US9523312||Nov 1, 2012||Dec 20, 2016||8 Rivers Capital, Llc||Integrated LNG gasification and power production cycle|
|US9562473||Aug 11, 2014||Feb 7, 2017||8 Rivers Capital, Llc||Gas turbine facility|
|US9581082||Jun 12, 2014||Feb 28, 2017||8 Rivers Capital, Llc||Partial oxidation reaction with closed cycle quench|
|US9638065||Jan 27, 2014||May 2, 2017||Echogen Power Systems, Llc||Methods for reducing wear on components of a heat engine system at startup|
|US9752460||Jan 27, 2014||Sep 5, 2017||Echogen Power Systems, Llc||Process for controlling a power turbine throttle valve during a supercritical carbon dioxide rankine cycle|
|US20040003592 *||Jul 8, 2003||Jan 8, 2004||Fermin Viteri||Hydrocarbon combustion power generation system with CO2 sequestration|
|US20040065088 *||Aug 22, 2003||Apr 8, 2004||Fermin Viteri||Semi-closed brayton cycle gas turbine power systems|
|US20040128975 *||Nov 17, 2003||Jul 8, 2004||Fermin Viteri||Low pollution power generation system with ion transfer membrane air separation|
|US20040134197 *||Oct 31, 2003||Jul 15, 2004||Ovidiu Marin||Hybrid oxygen-fired power generation system|
|US20050229603 *||Feb 23, 2005||Oct 20, 2005||Kabushiki Kaisha Toshiba||Steam turbine plant|
|US20050236602 *||Nov 30, 2004||Oct 27, 2005||Fermin Viteri||Working fluid compositions for use in semi-closed Brayton cycle gas turbine power systems|
|US20050241311 *||Apr 18, 2005||Nov 3, 2005||Pronske Keith L||Zero emissions closed rankine cycle power system|
|US20100018216 *||Mar 17, 2009||Jan 28, 2010||Fassbender Alexander G||Carbon capture compliant polygeneration|
|US20100247292 *||Mar 30, 2009||Sep 30, 2010||General Electric Company||System and Method of Cooling Turbine Airfoils with Sequestered Carbon Dioxide|
|US20100326084 *||Mar 4, 2010||Dec 30, 2010||Anderson Roger E||Methods of oxy-combustion power generation using low heating value fuel|
|US20110179799 *||Aug 31, 2010||Jul 28, 2011||Palmer Labs, Llc|
|US20110185701 *||Sep 26, 2008||Aug 4, 2011||Central Research Institute of Electric Power Indus try||Turbine equipment and power generating plant|
|CN102834670A *||Jan 26, 2011||Dec 19, 2012||帕尔默实验室有限责任公司|
|CN102834670B *||Jan 26, 2011||Jan 20, 2016||帕尔默实验室有限责任公司||利用二氧化碳循环工作流体高效发电的系统和方法|
|DE10147000B4 *||Sep 25, 2001||Feb 2, 2012||Alstom Technology Ltd.||Verfahren zum Betrieb einer Kraftwerksanlage|
|EP1219800A2 *||Dec 4, 2001||Jul 3, 2002||ALSTOM Power N.V.||Gas turbine cycle|
|EP1219800A3 *||Dec 4, 2001||Sep 7, 2005||ALSTOM Technology Ltd||Gas turbine cycle|
|EP2196650A1 *||Sep 26, 2008||Jun 16, 2010||Central Research Institute of Electric Power Industry||Turbine facility and power generating apparatus|
|EP2196650A4 *||Sep 26, 2008||Nov 3, 2010||Central Res Inst Elect||Turbine facility and power generating apparatus|
|EP2687680A3 *||Mar 5, 2013||Aug 27, 2014||Kabushiki Kaisha Toshiba||Axial turbine and power plant|
|EP2840312A3 *||Jan 26, 2011||Nov 18, 2015||Palmer Labs, LLC|
|WO1991002886A1 *||Aug 21, 1989||Mar 7, 1991||Shigeru Muraki||Thermal power generation method|
|WO1995024545A1 *||Mar 2, 1995||Sep 14, 1995||Crg Kohlenstoffrecycling Ges.Mbh||Process for the low-pollutant conversion of fossil fuels into power|
|WO2003027460A1 *||Sep 24, 2002||Apr 3, 2003||Alstom Technology Ltd||Method for operating a power station using co2|
|WO2003046340A1 *||Oct 4, 2002||Jun 5, 2003||Alstom Technology Ltd||Oxygen fired circulating fluidized bed steam generator|
|WO2004044388A1 *||Nov 10, 2003||May 27, 2004||L'air Liquide - Societe Anonyme A Directoire Et Conseil De Surveillance Pour L'etude Et L'exploitation Des Procedes Georges Claude||Hybrid oxygen-fired power generation system|
|WO2011094294A3 *||Jan 26, 2011||Jun 14, 2012||8 Rivers Capital, Llc|
|WO2014036256A1||Aug 29, 2013||Mar 6, 2014||Enhanced Energy Group LLC||Cycle piston engine power system|
|WO2014036258A1||Aug 29, 2013||Mar 6, 2014||Enhanced Energy Group LLC||Cycle turbine engine power system|
|U.S. Classification||60/772, 60/597, 60/39.52, 60/279|
|International Classification||F02C3/00, F01K25/00, F02C3/34|
|Cooperative Classification||F02C3/34, F01K25/005|
|European Classification||F01K25/00B, F02C3/34|