Class 60/647 - Including operating at or above critical pressure

Subclass of Class 60 - Power plants
Definition: Process, in which motive fluid in the course of power production
No. of patents: 20
Last issue date: 02/19/2008

Number	Title	Issue Date
7331181	Reheating steam temperature control A heat control system of reheating steam of a power plant, in which method the reheating steam (S3) is superheated in a reheater in a first reheating stage and a second reheating stage. The steam (S6) superheated in the first reheating stage is directe...	02/19/2008
7185491	Steam engine A steam engine has a looped fluid container, in which working fluid is filled. A heating device, a cooling device and an output device are arranged at the fluid container. A lower side valve is provided at a fluid passage of the fluid container between the heating d...	03/06/2007
7062911	Natural thermo-carrier heat release system A natural thermo-carrier heat release system that provides open or closed temperature regulation on an object with temperature delta to receive the heat release based on the work principle of descending of a flow at lower temperature and ascending at higher temperat...	06/20/2006
7021063	Reheat heat exchanger power generation systems A reheat heat exchanger is provided particularly for use in Rankine cycle power generation systems. The reheat heat exchanger includes a high pressure path between a high pressure inlet and a high pressure outlet. The reheat heat exchanger also includes a low pressu...	04/04/2006
7007474	Energy recovery during expansion of compressed gas using power plant low-quality heat sources A method of recovering energy from a cool compressed gas, compressed liquid, vapor, or supercritical fluid is disclosed which includes incrementally expanding the compressed gas, compressed liquid, vapor, or supercritical fluid through a plurality of expansion engin...	03/07/2006
6968705	Method and plant for cooling fluids by direct contact with liquefied gases A method and apparatus for cooling a fluid in the liquid state, possibly also containing solid elements, comprising feeding said fluid into a containing member for said fluid and also feeding into said member a cooling fluid in the liquid state, such as a liquefied ...	11/29/2005
6964168	Advanced heat recovery and energy conversion systems for power generation and pollution emissions reduction, and methods of using same Disclosed herein are various systems and methods for producing mechanical power from a heat source. In various illustrative examples, the system may include a heat recovery heat exchanger, a turbine, an economizer heat exchanger, a condenser heat exchanger, and a li...	11/15/2005
6751959	Simple and compact low-temperature power cycle A simple, compact, and relatively efficient thermodynamic power cycle system and process for extracting heat from a heat source stream and converting a portion of the heat to mechanical power. The system and process are composed of the same series of four processing...	06/22/2004
6674830	Nuclear reactor plant The subject of the present invention is to provide a nuclear reactor plant of which is a direct cycle nuclear reactor using a carbon dioxide as a coolant such that a heat evacuation for liquefying coolant is reduced while a compressive work is reduced by ...	01/06/2004
5570578	Heat recovery method and device suitable for combined cycles A heat recovery method is disclosed suitable for combined gas turbine/steam turbine cycles including at the exhaust of a gas turbine a waste heat boiler in which water is first treated in a degassing unit connected to a first evaporator and comprising a c...	11/05/1996
4550569	Main steam inlet structure for steam turbine A main steam inlet structure of a steam turbine has two inlet tubes which are separable from an inner casing and an outer casing of the turbine and are arranged concentrically with a spacing therebetween to constitute an inflow passage for main steam are ...	11/05/1985
4543788	Process for converting the internal energy of liquid CO₂ into mechanical energy capable of producing work as it changes from liquid to gas over its critical temperature Process and machine are disclosed for converting the internal energy of a fluid into mechanical energy capable of producing work, based on the use of the fluid having two alternative states, liquid and gaseous, at temperatures below and above, respectivel...	10/01/1985
4498289	Carbon dioxide power cycle An improved direct fired power system generating and employing a combustion gas which includes carbon dioxide or a working fluid including a combustion chamber (20) for burning a mixture which includes oxygen, carbonaceous fuel and recycled carbon dioxide...	02/12/1985
4484446	Variable pressure power cycle and control system A variable pressure power cycle and control system that is adjustable to a variable heat source is disclosed. The power cycle adjusts itself to the heat source so that a minimal temperature difference is maintained between the heat source fluid and the po...	11/27/1984
4358930	Method of optimizing performance of Rankine cycle power plants A method for efficiently operating a Rankine cycle power plant (10) to maximize fuel utilization efficiency or energy conversion efficiency or minimize costs by selecting a turbine (22) fluid inlet state which is substantially in the area adjacent and inc...	11/16/1982
4338789	Method of varying turbine output of a supercritical-pressure steam generator-turbine installation A method of varying turbine output from approximately 85% rated load down to approximately 65% rated output or alternatively from 100% down to approximately 85% where the turbine forms part of a supercritical installation having a steam generator for gene...	07/13/1982
4232524	Production of industrial electrical energy from hydraulic energy A process for the production of electrical energy from a fluid circulating in a closed circuit, of the type employing a fluid brought to saturating vapor phase in a substantially vertical column, at the upper part of which the fluid is returned to liquid ...	11/11/1980
4187686	Power generator utilizing elevation-temperature differential A power generator including a closed pressure resisting tubular loop having a lower warmed end and an upper cooled end joined by connecting penstock column and a return column, the tubular loop being filled with fluid under pressure, the critical point of...	02/12/1980
4118934	Process and apparatus for transforming heat at a relatively low temperature into power or energy The invention relates to a process for transforming heat having a low temperature into motive power, wherein heat which is carried by a first fluid is used for heating a condensable second fluid which participates in a thermodynamic cycle and wherein the ...	10/10/1978
3971211	Thermodynamic cycles with supercritical CO₂ cycle topping Gas turbine, steam turbine and/or process steam systems are combined with supercritical carbon dioxide cycle engines to produce major improvements in net plant efficiency by using the heat inputs and outputs of the supercritical CO2 cycle to su...	07/27/1976

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Class 60/647 - Including operating at or above critical pressure