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1105 results about "Organic Rankine cycle" patented technology

The Organic Rankine Cycle (ORC) is named for its use of an organic, high molecular mass fluid with a liquid-vapor phase change, or boiling point, occurring at a lower temperature than the water-steam phase change. The fluid allows Rankine cycle heat recovery from lower temperature sources such as biomass combustion, industrial waste heat, geothermal heat, solar ponds etc. The low-temperature heat is converted into useful work, that can itself be converted into electricity.

Working fluids for thermal energy conversion of waste heat from fuel cells using rankine cycle systems

A process for recovering waste heat which comprises: (a) passing a liquid phase working fluid through a heat exchanger in communication with a process which produces the waste heat; (b) removing a vapor phase working fluid from the heat exchanger; (c) passing the vapor phase working fluid to an expander, wherein the waste heat is converted into mechanical energy; and (d) passing the vapor phase working fluid from the expander to a condenser, wherein the vapor phase working fluid is condensed to the liquid phase working fluid. The preferred working fluid is an organic Rankine cycle system working fluid comprising compounds having the following general structure: where x, y, z, and m are each selected from the group consisting of: fluorine, hydrogen, Rf, and R, wherein R and Rf are each an alkyl, aryl, or alkylaryl of 1 to 6 carbon atoms, and wherein Rf is partially or fully fluorinated.
Owner:HONEYWELL INT INC

Chloro- And Bromo-Fluoro Olefin Compounds Useful As Organic Rankine Cycle Working Fluids

Aspects of the present invention are directed to working fluids and their use in processes wherein the working fluids comprise compounds having the structure of formula (I):wherein R1, R2, R3, and R4 are each independently selected from the group consisting of: H, F, Cl, Br, and C1-C6 alkyl, at least C6 aryl, at least C3 cycloalkyl, and C6-C15 alkylaryl optionally substituted with at least one F, Cl, or Br, wherein formula (I) contains at least one F and at least one Cl or Br, provided that if any R is Br, then the compound does not have hydrogen. The working fluids are useful in Rankine cycle systems for efficiently converting waste heat generated from industrial processes, such as electric power generation from fuel cells, into mechanical energy or further to electric power. The working fluids of the invention are also useful in equipment employing other thermal energy conversion processes and cycles.
Owner:HONEYWELL INT INC

Organic working fluids

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 sub-class 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.
Owner:ORMAT TECH INC

Minisize distributed type solar energy driven combining system for supplying cool, hot energy and electricity

InactiveCN101055121AGreen and environmentally friendly distributed energy supplyEfficient recyclingSolar heat devicesEnergy efficient heating/coolingWater useAdsorption refrigeration
The invention relates to micro distributed solar-driven combined cooling heating and power system belonging to field of energy technology. The invention includes: solar collection system, organic Rankine cycle thermal power generation system, adsorption refrigeration system, heating and hot water system, hot water distribution system, control system, secondary combustion device. The solar collection system is connected to the pipe of the hot water distribution and control system via the secondary combustion device, and the organic Rankine cycle thermal power generation system and the adsorption refrigeration system and the heating and hot water system are parallel connected to downstream of the hot water distribution and control system via pipes. The invention provides hot water by employing the vacuum tube solar water heater, and provides electricity by using ORC generation system, and provides cold water used by air conditioner and hot water by using the adsorption refrigeration system; the regulation and control on the hot water distribution system is user-oriented, and the system generates electricity, refrigerates, heats based on user requirement, and the system prepares the secondary combustion device to suffice the requirement when illumination is inadequate or user requirement is overlarge.
Owner:SHANGHAI JIAO TONG UNIV

Low temperature solar energy-biomass energy combined heat and power system

The invention relates to a low temperature solar energy-biomass energy combined heat and power system and a generating process. The system comprises a heat transfer fluid (such as heat transfer oil, ionic liquid, and water) circulation loop, a working medium circulation loop of an organic Rankine cycle, a heating furnace smoke discharge pipeline, a hot water heating loop and a cooling water loop. A heating furnace is used for supplementing heat for the heat transfer fluid or used as a standby heat source, and the heating surface uses dimethyl ether, heavy oil, biomass or low-grade cheap fuel made from the biomass; propane (R290), pentafluoropropane (R245fa) and the like are used as circulation working media; the exhaust heat regeneration quantity of the organic Rankine cycle can be adjusted according to the heating demand of a user; and a solar concentrator of the system is a solar concentration and waste heat recovery integrated vacuum flat-plate concentrator with a heat regenerating measure at the bottom, and the waste heat of exhaust smoke of the heating furnace can be recovered while fully using solar energy. The system can directly and efficiently convert a large quantity of low-grade biomass fuel and low-density solar energy into electric energy and supplies heat to users at the same time.
Owner:KUNMING UNIV OF SCI & TECH

Fuel cell and organic Rankine cycle combined power generating system based on LNG (Liquefied Natural Gas) cold energy utilization

The invention discloses a fuel cell and organic Rankine cycle combined power generating system based on LNG (Liquefied Natural Gas) cold energy utilization. The fuel cell and organic Rankine cycle combined power generating system comprises a solid oxide fuel cell and gas turbine combined cycle system, an organic Rankine cycle system and an LNG cold energy source, wherein un-reacted fuel in an SOFC (Solid Oxide Fuel Cell) and air combust in a rear combustion chamber to generate a high-temperature and high-pressure gas which enters the gas turbine for doing work and outputting electric energy; high-temperature exhaust gas in the gas turbine sequentially preheats the air, fuel and water; the organic Rankine cycle system is used for recycling low-temperature flue gas waste heat which is left after being used for preheating the air, the fuel and the water; the low-temperature flue gas waste heat is converted into electric energy for outputting, so that the cascade utilization of energy is realized; the LNG cold energy source as a cold source of organic Rankine cycle is used for condensing exhausted gas of an organic working medium turbine, so that back pressure of the organic working medium turbine is remarkably reduced and power output of the organic Rankine cycle is increased; and meanwhile, the cold energy of the LNG is recycled. According to the fuel cell and organic Rankine cycle combined power generating system disclosed by the invention, the conversion efficiency of energy source can be remarkably improved, the discharge of pollutants is reduced and the performances of the system are improved.
Owner:XI AN JIAOTONG UNIV
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