CN111750544A - Novel sinking type fixed-focus disc type solar energy thermoelectric combined supply system - Google Patents
Novel sinking type fixed-focus disc type solar energy thermoelectric combined supply system Download PDFInfo
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- CN111750544A CN111750544A CN202010758882.3A CN202010758882A CN111750544A CN 111750544 A CN111750544 A CN 111750544A CN 202010758882 A CN202010758882 A CN 202010758882A CN 111750544 A CN111750544 A CN 111750544A
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- 238000005338 heat storage Methods 0.000 description 11
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- 238000000034 method Methods 0.000 description 10
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- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
- F24S23/70—Arrangements for concentrating solar-rays for solar heat collectors with reflectors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G1/00—Hot gas positive-displacement engine plants
- F02G1/04—Hot gas positive-displacement engine plants of closed-cycle type
- F02G1/043—Hot gas positive-displacement engine plants of closed-cycle type the engine being operated by expansion and contraction of a mass of working gas which is heated and cooled in one of a plurality of constantly communicating expansible chambers, e.g. Stirling cycle type engines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S50/00—Arrangements for controlling solar heat collectors
- F24S50/80—Arrangements for controlling solar heat collectors for controlling collection or absorption of solar radiation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S60/00—Arrangements for storing heat collected by solar heat collectors
- F24S60/20—Arrangements for storing heat collected by solar heat collectors using chemical reactions, e.g. thermochemical reactions or isomerisation reactions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S80/00—Details, accessories or component parts of solar heat collectors not provided for in groups F24S10/00-F24S70/00
- F24S80/60—Thermal insulation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
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- Chemical & Material Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
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Abstract
The invention relates to the technical field of solar photo-thermal energy utilization auxiliary devices, in particular to a novel sinking fixed-focus disc type solar thermoelectric combined supply system which is simple in structure, small in occupied area and low in cost.
Description
Technical Field
The invention relates to the technical field of solar photo-thermal energy utilization auxiliary devices, in particular to a novel sinking type fixed-focus disc type solar thermoelectric combined supply system.
Background
The principle of the disc type solar photo-thermal technology is mainly that energy of sunlight is collected and converted into heat energy or electric energy, and the heat energy or the electric energy is transmitted to a user side to realize collection and utilization of energy; in the four technical routes, the groove technology, the tower technology and the Fresnel technology have already realized the commercialized application cases, and the exclusive disc technology still stays in the experimental stage; the traditional disc type solar energy system is generally a disc type Stirling system, uses a plurality of reflectors which are combined into a paraboloid or spherical reflector array to reflect and focus parallel sunlight to the surface of a Stirling generator thermal head at the focal point of a reflecting surface, through energy exchange, the reflector transmits solar energy to a heat head of the Stirling generator to heat a circulating working medium in the Stirling generator, the piston rod is pushed to reciprocate by a mode of doing work through thermal expansion, a generator at the rear end of the piston rod is driven to generate electricity, this kind of dish formula solar energy system is direct power generation formula system, can't carry on energy storage system, and because the change of solar irradiation (like cloudy, overcast and rainy etc.), the energy that leads to the speculum focus often appears undulantly, and stirling generator who is difficult to continuous stable operation, receives the restriction of above-mentioned problem, and large-scale market ization of can't carrying on all the time of this system is used.
Aiming at the market needs and the defects of the disk type technology, light solar technology (Beijing) limited company discloses a single-tower multi-disk type solar power generation system with the patent number ZL201010279188.X and a split running solar disk type light-gathering power generation system with the patent number ZL201210103111.6, the system keeps the special point focusing form and the characteristic of double-shaft day-by-day tracking of the disk type system, a reflecting system is separated from a heat absorber, the heat absorber is arranged at the top of a heat collecting tower arranged in the center of the system, the synchronism of the movement of the heat absorber and a reflecting mirror is ensured by controlling the synchronous tracking mode of the system, a heat storage system and a heat exchange system are arranged in the heat collecting tower, the technical problem that the disk type system cannot store heat is solved, the process route of directly converting the disk type system from solar energy into electric energy is changed into the process route of converting the solar energy into the heat energy and then into the electric energy, but from the technical point of view, because the system is arranged on the ground, the system is required to have higher wind resistance performance during operation so as to ensure the quality of the reflected and focused light spots of the reflector, the wind resistance requirement on the main structure is higher, the whole system has larger steel consumption, the system cost is overhigh, the economy of market promotion is not possessed, the shielding area during the operation of the system is also larger, the occupied area of the system is larger, and certain economical problems are also caused.
Disclosure of Invention
In order to solve the technical problems, the invention provides a novel sinking type fixed-focus disc type solar heat and power cogeneration system which is simple in structure, small in occupied area and low in cost.
The invention relates to a novel sinking fixed-focus disc type solar heat and power combined supply system, which comprises a reflection system, a driving system, a thermal system, an electrical system, a control system and a mirror bracket, speculum and mirror support, the mirror support passes through the bolt fastening with the mirror holder, the speculum carries out the fixed stay through mirror support and mirror holder, actuating system still includes the hydraulic drive subassembly, the every single move wheelset, horizontal track and every single move track, every single move wheelset top passes through the bolt fastening with the mirror holder, every single move wheelset slidable fixes on every single move track, every single move track is fixed on horizontal wheelset, horizontal wheelset slidable fixes on horizontal track, thermal engineering system still includes support and heat absorber, the heat absorber is fixed through the support, the heat absorber is located speculum focus department, electrical system still includes and supplies distribution device and electrical control device, control system still includes sensor and control computer.
The invention relates to a novel sinking fixed-coke disc type solar heat and power combined supply system, which comprises a heat absorber, a heat absorption pipe and a heat insulation material, wherein the heat absorption pipe is a plurality of round thin steel pipes, a plurality of circles of parallel spiral coils are wound on a mould in a hot bending forming mode, an inlet pipeline and an outlet pipeline of the parallel spiral coils are respectively connected with an inlet header and an outlet header, a central header is arranged at the middle section of the heat absorption pipe, the shell is divided into an inner layer and an outer layer, the heat insulation material covers the middle of the two layers of shells, the shell is connected with the heat absorption pipe through a bearing, and meanwhile, the heat absorption pipe is kept relatively fixed.
The invention relates to a novel sinking type fixed-focus disc type solar heat and power combined supply system.
The invention relates to a novel sinking type fixed-focus disc type solar heat and power combined supply system, wherein pitching rails are circular steel rails, two groups of pitching rails are arranged and are respectively positioned on the left side and the right side of a support, the whole shape is circular arc, the circle center is consistent with the focus of a reflector, the horizontal rails are divided into an inner ring, a middle ring and an outer ring which are I-shaped steel rails, the inner ring rails are circular, the middle ring and the outer ring rails are 270-degree circular arcs, the three groups of horizontal wheel groups are respectively positioned at three horizontal rails with different positions, the inner ring wheel group is composed of supporting wheels, the middle ring wheel group is composed of side hook wheels and supporting wheels, and the outer ring wheel group is provided with two side hook wheels.
Compared with the prior art, the invention has the beneficial effects that: the disc type solar energy system is a complete energy output system, carries heat load equipment with different grades, can realize gradient utilization of energy, realizes a combined cooling heating and power supply function meeting the market energy demand, is beneficial to market application of the solar photo-thermal technology and commercial popularization, has a simple system structure, is easier to realize than the prior art in process principle, lower in engineering quantity, smaller in occupied area and lower in system cost, and due to the sinking design of the system, the system part is positioned below a horizontal plane (ground), so that the efficiency loss (mainly the system heat loss caused by environmental wind) during the operation of the system is effectively reduced, the wind resistance requirement of the system is reduced, and the safety and the stability of the operation of the system are enhanced.
Drawings
FIG. 1 is a schematic diagram of the basic structure of the system of the present invention;
FIG. 2 is a schematic diagram of the system process of the present invention;
in the drawings, the reference numbers: 1. a frame; 2. a mirror; 3. a set of pitch wheels; 4. a horizontal wheel set; 5. a horizontal rail; 6. a pitch track; 7. a support; 8. a heat sink.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
Example (b): as shown in fig. 1 and 2:
(1) a reflection system: one of the core components of the system mainly plays a role in reflecting, focusing and projecting parallel sunlight on the surface of a reflector, and the reflecting system is a reflector array consisting of a plurality of reflectors. The projection section of the mirror array is circular, the outline curve is parabolic, the sub-mirrors are plane mirrors, four corners of the back of each plane mirror are respectively adhered to the mirror supports, and the mirror supports are connected with the reflector mirror frame through bolts. The reflector mirror frame is positioned at the rear of the reflector, is of a truss steel structure, is formed by welding and connecting a plurality of steel pipes, and is connected with the reflector mirror support through bolts to play a role in fixedly supporting the reflector.
(2) A driving system: the system is mainly used for driving the reflection system to track movement day by day or finish movement under various working conditions. The system consists of hydraulic driving components, pitching wheel groups, horizontal rails, pitching rails and other components. The upper end of the pitching wheel set is directly connected with the reflector mirror frame through a bolt, and the lower end pulley is contacted with the pitching rail and can perform pitching motion on the pitching rail; the pitching rails are circular steel rails, the total number of the pitching rails is two, the pitching rails are respectively positioned at the left side and the right side of the reflector frame, the whole shape is circular arc, and the circle center is consistent with the reflector focus; the pitching rail is integrally erected above the horizontal wheel set and can horizontally move on the horizontal rail. The horizontal wheel set is a component which is positioned between the horizontal track and the pitching track and drives the structure of the upper end (the pitching track, the reflecting system and the like) of the horizontal wheel set to horizontally move under the action of a motor, the horizontal wheel set is divided into three groups which are respectively positioned at three horizontal tracks with different positions, the inner ring wheel set is composed of supporting wheels and mainly plays a supporting role, the middle ring wheel set is composed of side hook wheels and supporting wheels and mainly plays a supporting and centering role, and the outer ring wheel set is provided with two side hook wheels and supporting wheels and mainly plays a centering role. The horizontal track is divided into an inner ring, a middle ring and an outer ring which are I-shaped steel tracks, wherein the inner ring track is circular, and the middle ring track and the outer ring track are 270-degree circular arcs. The hydraulic driving assembly comprises a hydraulic cylinder, a speed reducer, a motor and the like, and is mainly used for driving the system structure to perform horizontal and pitching motion.
(3) A thermal engineering system: the thermotechnical system is an energy collecting, storing, exchanging and outputting part of the whole system. The thermal cycle process is described as: the heat transfer medium (molten salt) is pumped out from the low-temperature heat storage tank body and conveyed to the heat absorber, when the heat absorbing pipe flows in the heat absorbing pipe, the solar radiation energy focused and reflected to the outer surface of the heat absorbing pipe from the reflection system is received, the temperature of the heat transfer medium is raised in a conduction heat exchange mode, the heat transfer medium is ensured to reach the designed temperature when the heat transfer medium flows out of the heat absorber in a flow control mode, the energy collection work is completed, the heat transfer medium flows into the high-temperature heat storage tank body to perform the energy storage work, when the energy exchange and the output are needed, the high-temperature heat transfer medium is pumped out from the high-temperature heat storage tank body and conveyed into the Stirling power generation assembly or the heat exchange assembly (or simultaneously conveyed into the two assemblies) to perform the energy exchange respectively to generate electric energy or heat energy (saturated or superheated steam), the process is called as a primary energy exchange and output process, and after the process is, and converting the electric energy to generate electric energy for output, wherein the process is called as a secondary energy exchanger output process, and after the process is finished, the heat transfer medium is reduced to the initial temperature and flows back to the low-temperature heat storage tank body, so that a complete thermal cycle is completed. The thermodynamic system comprises a heat absorber assembly, a heat storage assembly, a Stirling power generation assembly, a heat exchange assembly, a low-temperature waste heat power generation (ORC) assembly and the like. The heat absorber assembly consists of a cavity heat absorber and a driving assembly thereof, the heat absorber consists of a heat absorber shell, a heat absorbing pipe and a heat insulating material thereof, the heat absorbing pipe is a plurality of round thin steel pipes, a plurality of circles of parallel spiral coils are wound on a die in a hot bending forming mode, an inlet pipeline and an outlet pipeline of the spiral coils are respectively connected with an inlet header and an outlet header, a central header is arranged at the middle section of the heat absorbing pipe, and the header mainly serves as a mixed heat transfer medium to eliminate the temperature difference of the heat transfer medium flowing out of different heat absorbing pipe sub-pipes. The outer shell of the heat absorber is divided into an inner shell and an outer shell, a heat insulation material is covered between the two shells to reduce the energy loss of the heat absorber, and the outer shell of the heat absorber is connected with the heat absorption pipe through a bearing, so that the heat absorber can perform pitching and horizontal movement under the action of the driving assembly, and meanwhile, the heat absorption pipe is kept relatively fixed; the driving assembly in the heat absorber assembly is mainly a motor and a speed reducer and is used for driving the double-shaft movement of the shell of the heat absorber, and the movement state of the driving assembly is consistent with that of the reflecting system, namely, the opening interface of the heat absorber and the effective reflecting interface of the reflector are always kept in a parallel state. The heat storage assembly mainly comprises a heat storage tank body, a heat insulation material and an additional assembly thereof, wherein the heat storage tank body is a vertical elliptic sealed tank body and is made of high-temperature-resistant and corrosion-resistant stainless steel materials, the heat insulation material is wrapped outside the tank body to reduce the heat dissipation loss of the assembly, the additional assembly mainly comprises a molten salt pump, a valve, an electric heater, an instrument and the like, the molten salt pump is an output power source of molten salt and is used for pumping out the molten salt and conveying the molten salt to a back-end system, the valve comprises a pressure release valve and an exhaust valve and is mainly used for ensuring the safe operation of the heat storage tank body, the electric heater is an inserted heating device and is mainly used for standing the molten salt in the heat storage tank body for a long time and supplementing (heating) the energy when the temperature is reduced to a certain degree, the instrument and, and a basis is provided for the operation control of the control system. The Stirling power generation subassembly comprises Stirling generator and fused salt groove two parts, and its theory of operation is that Stirling generator back-off is fixed in fused salt groove top, and its hot head stretches into in the fused salt groove, and the subassembly during operation, high temperature fused salt carry out quick cycle in the fused salt inslot and erode, and the mode through conduction heat transfer is with energy transfer to Stirling machine hot head department to the generator at drive Stirling machine top generates electricity, and the fused salt groove adopts high temperature resistant corrosion stainless steel material to make. The heat exchange assembly consists of a preheater, a steam generator, an additional heat insulation material and instrument equipment, when superheated steam is needed, the superheater can be added into the heat exchange assembly, and the equipment in the heat exchange assembly is standard equipment and is mainly used for carrying out brine heat exchange, transferring heat in molten salt to saturated water, generating saturated or superheated steam and transmitting the saturated or superheated steam to a user side. The low-temperature waste heat power generation assembly is a low-temperature organic Rankine cycle assembly, comprises standard equipment such as a heat exchanger, a low-temperature generator and a condenser, and is mainly used for converting the energy of the molten salt with the waste heat into electric energy through a mode of exchange and conversion and outputting the electric energy, so that the energy utilization rate of the whole system is improved.
(4) An electrical system: the electric system is divided into two parts of power supply and distribution and electric control, wherein the power supply and distribution component mainly supplies power to electric equipment in the system, such as molten salt pumps, motors and other components, and the electric control part mainly comprises standard electric equipment such as a distribution box, a PLC, a servo motor and the like. While all devices in the system contain UPS (stand-by power supply assembly) for power supply for system risk avoidance in case of sudden power outage or extreme situations.
(5) The control system comprises: the control system is an operation control component of the system and mainly used for day tracking/focus deviation control, system start and stop control, system risk avoidance control, system thermal system operation control and the like; the control system consists of a control sensor and a control computer, the working principle of sun tracking/focus deflection control is that according to an inputted astronomical formula, the pitching and horizontal running speed of the system is controlled by issuing an instruction to a hydraulic drive assembly, meanwhile, the day-by-day precision of the system is corrected by implementing data feedback of a four-quadrant sensor or an inclinometer, and when the system needs to deflect, the control drive assembly drives a reflection system to deflect according to a set program; the system risk avoiding control is that when the environment monitoring equipment monitors that the environment factors have significant changes (such as strong wind, heavy rain, sand raising and the like), the control system starts a risk avoiding program, drives the component to issue an instruction according to the established program, enables the driving system to operate to a risk avoiding position, and determines the time and the speed of operation recovery and the like through the implementation feedback data analysis of the environment monitoring equipment. The operation control of the system thermal system is to judge the operation state of the system by analyzing the feedback data (temperature, pressure or flow, etc.) of instruments and meters arranged at each equipment in the thermal system, perform comprehensive analysis by combining the control of other parts of the system, perform scene judgment on the output condition, operation safety condition, etc. of the system, and control the system by controlling the opening of a valve or switching operation modes, etc. The system start-stop control is to operate the automation equipment according to the set program according to the start-up/shut-down control logic, so as to ensure the safe start-up and shut-down of the system.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (4)
1. A novel sinking fixed-focus disc type solar heat and power cogeneration system is characterized by comprising a reflection system, a driving system, a thermal system, an electrical system and a control system, wherein the reflection system further comprises a mirror bracket (1), a reflection mirror (2) and a mirror support, the mirror support is fixed with the mirror bracket (1) through bolts, the reflection mirror (2) is fixedly supported with the mirror bracket (1) through the mirror support, the driving system further comprises a hydraulic driving component, a pitching wheel group (3), a horizontal wheel group (4), a horizontal rail (5) and a pitching rail (6), the top end of the pitching wheel group (3) is fixed with the mirror bracket (1) through bolts, the pitching wheel group (3) can be fixed on the pitching rail (6) in a sliding manner, the pitching rail (6) is fixed on the horizontal wheel group (4), the horizontal wheel group (4) can be fixed on the horizontal rail (5) in a sliding manner, the thermal system further comprises a support (7) and a heat absorber (8), the heat absorber (8) is fixed through the support (7), the heat absorber (8) is located at the focus of the reflector (2), the electric system further comprises a power supply and distribution device and an electric control device, and the control system further comprises a sensor and a control computer.
2. A novel sunk fixed-coke disc type solar combined heat and power system as defined in claim 1, wherein the heat absorber (8) is composed of a housing, a heat absorbing pipe and a heat insulating material, the heat absorbing pipe is a plurality of round thin steel pipes, a plurality of coils are wound on the mold in a hot bending manner to form a parallel spiral coil, the inlet pipeline and the outlet pipeline of the coil are respectively connected with the inlet header and the outlet header, the central header is arranged at the middle section of the heat absorbing pipe, the housing is divided into an inner layer and an outer layer, the heat insulating material is covered between the two layers of the housing, the housing is connected with the heat absorbing pipe through a bearing, and the heat absorbing pipe is kept relatively fixed.
3. The novel sunk fixed-focus disc type solar thermal power cogeneration system according to claim 2, wherein the hydraulic drive assembly comprises a hydraulic cylinder, a motor and a speed reducer.
4. The novel sinking fixed-focus disc type solar thermal power cogeneration system according to claim 3, wherein the pitching rails (6) are circular steel rails, two groups of the pitching rails are arranged and respectively positioned at the left side and the right side of the bracket (7), the overall shape is circular arc, the center of the circle is consistent with the focus of the reflector (2), the horizontal rails (5) are divided into an inner ring, a middle ring and an outer ring which are I-shaped steel rails, wherein the inner ring rails are circular, the middle ring and the outer ring rails are 270-shaped circular arcs, the horizontal wheel groups (4) are three groups and respectively positioned at the three horizontal rails (5) with different positions, each inner ring wheel group is composed of supporting wheels, each middle ring wheel group is composed of a side hook wheel and a supporting wheel, and each outer ring wheel group is provided with a double-side hook wheel and.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010758882.3A CN111750544B (en) | 2020-07-31 | 2020-07-31 | Sinking type fixed Jiao Die type solar cogeneration system |
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| CN202010758882.3A CN111750544B (en) | 2020-07-31 | 2020-07-31 | Sinking type fixed Jiao Die type solar cogeneration system |
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2020
- 2020-07-31 CN CN202010758882.3A patent/CN111750544B/en active Active
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|---|---|---|---|---|
| JP2009109075A (en) * | 2007-10-30 | 2009-05-21 | Mitaka Koki Co Ltd | Installation structure for solar tracking and condensing device |
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| CN102606430A (en) * | 2012-04-10 | 2012-07-25 | 刘晓冰 | Separately running disc-type solar concentrated power generating system |
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