562results about "Steam generation using solar heat" patented technology

An electricity generation system is presented. The electricity generation system includes a solar preheater for preheating compressed discharge air, a combustor to receive the heated compressed air from the solar preheater, burn a fuel using the heated compressed air to generate hot burned gas, a first turbine to receive the hot burned gas from the combustor, expand the hot burned gas to generate exhaust gas, a heat recovery steam generator to receive the exhaust gas from the first turbine, generate vapor by heating a condensed fluid using the exhaust gas, a solar evaporator/superheater to receive a heated working fluid from the heat recovery steam generator, generate solar vapor by heating the heated working fluid, and a second turbine to drive a second generator using vapor and the solar vapor.

A solar thermal power generator includes an inclined elongated boiler tube positioned in the focus of a solar concentrator for generating steam from water. The boiler tube is connected at one end to receive water from a pressure vessel as well as connected at an opposite end to return steam back to the vessel in a fluidic circuit arrangement that stores energy in the form of heated water in the pressure vessel. An expander, condenser, and reservoir are also connected in series to respectively produce work using the steam passed either directly (above a water line in the vessel) or indirectly (below a water line in the vessel) through the pressure vessel, condense the expanded steam, and collect the condensed water. The reservoir also supplies the collected water back to the pressure vessel at the end of a diurnal cycle when the vessel is sufficiently depressurized, so that the system is reset to repeat the cycle the following day. The circuital arrangement of the boiler tube and the pressure vessel operates to dampen flow instabilities in the boiler tube, damp out the effects of solar transients, and provide thermal energy storage which enables time shifting of power generation to better align with the higher demand for energy during peak energy usage periods.

A thermal collection system has a first tank for storing relatively hot working fluid and a second tank for storing relatively cold working fluid. A heat exchanger is connected for receiving the relatively hot working fluid from the first tank for providing heat to the heat exchanger. The heat exchanger discharges the working fluid at a lower temperature than a temperature of the relatively hot working fluid of the first tank. A solar panel collector is connected for receiving the lower temperature working fluid from the heat exchanger and for heating the lower temperature working fluid and feeding same to a first control valve. The first control valve is operative for feeding working fluid from the solar collector selectively to one of the first tank and the second tank. The second tank has a second control valve selectively operative for permitting working fluid from the second tank to flow to the solar collector. Improved collection efficiencies in the solar collector may be obtained using the two tank structure for passing working fluid through the solar collector.

A combustion turbine power generation system can be combined with a solar Rankine power generation system such that the integrated system has improved power generation efficiency over two stand-alone systems. This novelty has the solar heat input providing the heat of vaporization as well as a certain amount of superheat such that if the combustion turbine is not available, or is used in a different and more economical mode of operation, the solar Rankine cycle can be operated independently in a cost effective and efficient manner. In addition, to further improve the method of independent cycle operation, regenerative feedwater heating is proposed to be added to the solar Rankine cycle and to simplify the independent operation of the two cycles. The reheat cycle, as proposed by Cohen, is eliminated. Finally, the concept of variable pressure operation is proposed for this novelty to further ease the operation and improve the economics of independent cycle operations.

A solar concentration plant which uses water/steam as a heat-carrying fluid, in any thermodynamic cycle or system for the exploitation of process heat, which is comprised of an evaporation subsystem, where saturated steam is produced under the conditions of pressure of the system, and a superheater subsystem through which the steam reaches the required conditions of pressure and temperature at the turbine inlet, and in which an attemperation system (10) may be incorporated, these being physically separated and interconnected by means of a drum (5) in which the separation of water and steam takes place, and in which a strategic control of the pointing of the field of heliostats (1) towards either of the subsystems (evaporator or superheater) may be carried out, with individual or group pointing of the heliostats, in such a way that they jointly control both the pressure within the drum (5) and the outlet temperature of the superheated steam (11).

An apparatus for generating steam within a heat exchanger. In one aspect, the invention can be a heat exchanger comprising: a shell having an inner surface forming a cavity, the shell comprising an inlet for introducing the shell-side liquid into the cavity and an outlet for allowing the vapor to exit the cavity; a tube bundle comprising a plurality of tubes for carrying a tube-side fluid located in the cavity and having a longitudinal axis; a shroud circumferentially surrounding the tube bundle and positioned between the tube bundle and the inner surface of the shell so that an annular space exists between the shroud and the inner surface; an opening in a bottom portion of the shroud that forms a passageway between the annular space and the tube bundle; and an opening in a top portion of the shroud that forms a passageway between the annular space and the tube bundle.

The invention discloses a sensible heat accumulating type direct steam generation system based on parallel connection regulation as well as a method. The sensible heat accumulating type direct steam generation system comprises an outlet header, outlet connecting pipes, a heat accumulator, heat exchange tube bundles, a first temperature sensor, a sealed thermal insulation layer, motor operated valves, inlet connecting pipes, an inlet header, a circulating water pipe, a flow meter, a control cabinet, a water replenishing connecting pipe, a water storage tank, a second temperature sensor and a third temperature sensor. With the method of parallel connection of heat exchange pipelines, the problem that the heat exchange area per unit and the heat exchange power per unit are reduced continuously due to continuous reduction of the temperature in a heat exchange process of the sensible heat accumulator is solved effectively by changing the heat exchange area and reducing flow in single pipeline, the stability of output power of the system is improved, an effective solution is provided for replacing small and medium-sized coal burning boilers and electric boilers and providing stable steam with peak-valley electricity, and very good application prospect is provided.

The invention discloses a solar water purifier based on interface solar photo-thermal conversion, which comprises a solar interface evaporator and a distilled water collector, the solar interface evaporator comprises an open water storage tray and a light absorber with high photo-thermal conversion efficiency, the light absorber is of a double-layer structure and is formed by compounding an upper-layer photo-thermal conversion material and a lower-layer thermal insulation material, and a dust-free cloth is arranged between the upper-layer material and the lower-layer material. During use, it needs to be guaranteed that the dust-free cloth can continuously make contact with the liquid level in a water storage disc, so that it is guaranteed that enough water is conveyed to the surface of thelight absorber to guarantee continuous evaporation. Only solar energy is used as driving energy, other energy sources are not consumed, meanwhile, the problem of replacement of a filter element of aconventional water purifier is avoided, and the device has the advantages of being portable, low in price, high in water purification efficiency and the like and can be stably applied to seawater desalination, sewage treatment and outdoor drinking water purification for a long time.

A run-up method for a solar steam power plant is proposed. In the run-up method an auxiliary steam is used to generate seal steam for a steam-turbine of the power plant. The auxiliary steam is produced by a heat-exchanger-system that is to provide, during a subsequent power-mode, overheated steam for driving the steam-turbine.

A thermal power plant includes carbon dioxide capture scrubbing equipment that suppresses reductions in the efficiency and output of a steam turbine, and, at the same time, reduces variations in the amount of steam supplied from a solar heat collection apparatus to a reboiler and variations in the temperature and pressure of reboiler generated steam, and stably carries out reactions for separating carbon dioxide from an absorbent by heating. The thermal power plant includes the carbon dioxide capture scrubbing equipment for capturing carbon dioxide from a boiler exhaust gas and the solar heat collection apparatus. Steam generated by the solar heat collection apparatus is supplied to the reboiler provided for a regeneration tower of the carbon dioxide capture scrubbing equipment.

A solar receiver is disclosed. The solar receiver is modular, has multiple tube panels in a rectangular/square/polygonal/circular configuration, and is designed for use with molten salt or another heat transfer fluid. The heat transfer fluid flows in a vertical serpentine path through the sides (facets) of the solar receiver. The solar receiver can be shop assembled and can be used with a support tower to form a solar power system.

A solar-thermal power plant is provided. The solar-thermal power plant includes a working fluid circuit, a solar steam generator based on direct evaporation and a steam turbine for relieving the working fluid on a relief path while the working fluid supplies technical work. The solar-thermal power plant also includes at least one intermediate superheater, which can be heated using the working fluid. The working fluid may be removed from the circuit upstream of the intermediate superheater and superheated using the working fluid thereof, which can be fed downstream of the heating removal using the relief path. A method for operating a solar-thermal power plant is also provided.

The invention discloses a solar energy high-temperature storing and releasing system based on a thermochemical method. The solar energy high-temperature storing and releasing system comprises a heat transferring fluid supply subsystem, a reaction subsystem, a heat exchange subsystem, a condensing subsystem, a water steam generating subsystem, a water supply system and a Rankine steam electric generator set. Heat transferring fluid in a cold storing tank absorbs solar heat through a solar heat collector to become high-temperature heat transferring fluid and then enters a heat storing tank. At the time of heat storing, the high-temperature heat transferring fluid flows out from the bottom of the heat storing tank, flows into a heat exchange pipe inlet of a heat storing/releasing reactor and provides the heat for the reactor. Hydroxides on a reaction bed layer are subjected to a heat absorption and decomposition reaction to achieve heat energy storing. At the time of heat releasing, a steam generator provides water steam for the reactor, a hydration reaction is conducted, a large amount of heat is released, and heat energy is provided for the Rankine steam electric generator set through two modes of direct and indirect heat exchange. According to the solar energy high-temperature storing and releasing system, the requirement for energy saving and emission reduction can be met, the efficient, stable and high-grade heat energy is provided for solar energy heat power generating, and continuous operation of the heat power generating system is achieved.

Direct solar thermal steam generator with an ultra-compact linear Fresnel reflector field that has “travel and turn” capability by means of independent linear and rotational motion of reflectors.

Method of positioning and orienting the reflectors of the traveling field such that the reflected energy of the field is maximized at all times

Crescent like rotational support rail of the reflector with its gravitational center in the center of the crescent. The curvature of the reflector is customized for each row of the field

Ultra-light, collector-absorber structure, with cable suspended arch-like tubular absorber, wide aperture, and secondary reflector with optimized light entrapment

Flow distribution and control method of the large horizontal solar thermal steam generation field.

An oil recovery system and method is disclosed. The system includes a solar power tower for receiving a first portion of water from a water treatment device. The solar power tower heats the first portion of water directly using solar radiation and generates a first steam. Further, the system includes a boiler for receiving a second portion of water from the water treatment device. The boiler heats the second portion of water and generates a second steam. Further, the system includes a flow control device coupled to the solar power tower and the boiler to receive at least one of the first steam and the second steam. The flow control device injects at least one of the first steam and the second steam to an oil field.

Apparatus (1) for storing energy, comprising: a high pressure storage vessel (10) for receiving high pressure gas, the high pressure storage vessel (10) comprising high pressure heat storage means comprising a first chamber housing a first gas-permeable heat storage structure (14); and a low pressure storage vessel (11,12) for receiving low pressure gas, the low pressure storage vessel (11,12) comprising low pressure heat storage means comprising a second chamber housing a second gas-permeable heat storage structure (16,18); wherein the first heat storage structure (14) has a mean surface area per unit volume which is higher than a mean surface area per unit volume of the second heat storage structure (16,18).

The solar-based power generator is a system for producing usable electricity from water, which is heated through concentration of ambient, environmental light. The generator includes a reservoir having an open upper end. The reservoir receives a volume of water therein. A convex lens is mounted on an upper edge of the reservoir. The convex lens covers the open upper end. A steam output port is in fluid communication with a steam-based electrical generator. The convex lens concentrates ambient light on the water stored within the reservoir, thus heating the water and to converting the liquid water to steam. Additionally, a methane-burning electrical generator is in communication with the reservoir. Pollutants in the water produce methane during heating and decomposition, which is burned by the methane-burning electrical generator.

A method of generating superheated steam in a solar thermal power plant is provided, in which in a flow section for heat transfer medium steam is generated by solar energy in an evaporator zone and the steam is superheated by solar energy in a superheater zone. An evaporation end point of the evaporator zone is fixed in position in a control method, in which a spatial temperature gradient in the superheater zone and a temperature in the evaporator zone are determined and the mass flow of heat transfer medium in the flow section is adjusted in dependence upon the temperature gradient and the measured temperature in the evaporator zone.