CN110873028A - Disc type photo-thermal coupling gas Stirling power generation system and power generation method - Google Patents

Disc type photo-thermal coupling gas Stirling power generation system and power generation method Download PDF

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Publication number
CN110873028A
CN110873028A CN201811030016.1A CN201811030016A CN110873028A CN 110873028 A CN110873028 A CN 110873028A CN 201811030016 A CN201811030016 A CN 201811030016A CN 110873028 A CN110873028 A CN 110873028A
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China
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power generation
combustion chamber
disc type
gas
thermal
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CN201811030016.1A
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杨豫森
崔华
徐波
谭智
陈辉
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Hepu Technology Development Beijing Co Ltd
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Hepu Technology Development Beijing Co Ltd
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Priority to CN201811030016.1A priority Critical patent/CN110873028A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
    • F03G6/00—Devices for producing mechanical power from solar energy
    • F03G6/06—Devices for producing mechanical power from solar energy with solar energy concentrating means
    • F03G6/068—Devices for producing mechanical power from solar energy with solar energy concentrating means having other power cycles, e.g. Stirling or transcritical, supercritical cycles; combined with other power sources, e.g. wind, gas or nuclear
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
    • F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
    • 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
    • Y02E10/46—Conversion of thermal power into mechanical power, e.g. Rankine, Stirling or solar thermal engines

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Photovoltaic Devices (AREA)

Abstract

The invention discloses a disc type photo-thermal coupling gas Stirling power generation system and a power generation method, wherein the disc type photo-thermal coupling gas Stirling power generation system comprises a disc type photo-thermal heat collection device, a movable front combustion chamber, a Stirling power generation device and a supporting and moving mechanism; the two sides of the Stirling power generation device are respectively provided with a hot end and a cold end, and the hot end is provided with a high-temperature heat absorption surface; the movable front combustion chamber is fixedly arranged on the supporting and moving mechanism, and the supporting and moving mechanism drives the movable front combustion chamber to be switched between a first position and a second position. The invention can realize the coupling of photo-thermal power generation and gas Stirling power generation in one device, thereby ensuring the stable power generation output of the whole generator set at day and night.

Description

Disc type photo-thermal coupling gas Stirling power generation system and power generation method
Technical Field
The invention relates to the field of coupling power generation utilization, in particular to a disc type photo-thermal coupling gas Stirling power generation system and a power generation method.
Background
With the growing shortage of global energy consumption, people pay more attention to the environment. Energy shortage and environmental pollution have become important topics influencing people's lives and restricting social development, and all countries around the world strive to develop clean new energy. Solar energy, as a clean, environmentally friendly, and abundant natural energy, is increasingly used as the energy source in human resources.
The existing disc type Stirling can only generate electricity on sunny days with the sun, and the heat accumulation or afterburning of the system is difficult to realize due to the fact that the position of the Stirling engine is not fixed (rotates along with the disc frame). The output power of the generator is easily affected by weather, and the sunshine intensity of the generator is constantly changed even in the daytime, so that the output electric energy is unstable, and the generator needs to be adjusted to be stable before being connected to a power grid.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a coupling Stirling power generation system and a coupling Stirling power generation method, a front combustion chamber is additionally arranged below a high-temperature heat collection surface of a solar heat collection device of a disc type photo-thermal Stirling generator, and the gas Stirling generator is coupled with the photo-thermal Stirling generator, so that all-weather 24-hour stable power generation output of the photo-thermal Stirling generator can be realized.
In order to achieve the purpose, the invention adopts the following technical scheme:
a dish formula light and heat coupling gas stirling power generation system includes:
the device comprises a disc type photo-thermal heat collection device, a movable front combustion chamber, a Stirling power generation device and a supporting and moving mechanism;
the two sides of the Stirling power generation device are respectively provided with a hot end and a cold end, and the hot end is provided with a high-temperature heat absorption surface;
the movable front combustion chamber is fixedly arranged on the supporting and moving mechanism, and the supporting and moving mechanism drives the movable front combustion chamber to be switched between a first position and a second position;
when the movable front combustion chamber is located at the first position, the high-temperature heat absorption surface receives solar heat energy from the disc type photo-thermal heat collection device and transfers the solar heat energy to the hot end;
when the movable preposed combustion chamber is positioned at the second position, the high-temperature heat absorption surface receives the gas combustion heat energy from the movable preposed combustion chamber and transfers the gas combustion heat energy to the hot end.
Further, the cold end is connected with a heat dissipation mechanism, and the heat dissipation mechanism is an air cooling device or a water cooling device.
Further, the movable pre-combustor comprises a combustor casing and a combustion component located inside the combustor casing.
Further, when the movable front combustion chamber is located at the first position, the disc type photothermal heat collecting device directly transfers the solar heat energy to the high-temperature heat absorbing surface; when the movable front combustion chamber is located at the second position, the combustion chamber outer cover and the high-temperature heat absorption surface jointly surround to form a closed combustion space capable of containing the combustion component.
Further, the combustion part is a combustor; the combustor is communicated with the gas supply pipeline.
Furthermore, the combustion part is an igniter and a plurality of gas nozzles and air nozzles surrounding the igniter.
Further, the movable front combustion chamber also comprises a refractory material layer arranged outside the combustion chamber outer cover.
A power generation method adopting a disc type photo-thermal coupling gas Stirling power generation system comprises the following steps:
s1, setting the disc type photo-thermal coupling gas Stirling power generation system to be in an initial state, wherein in the initial state, the movable front combustion chamber is located at the first position, and the disc type photo-thermal heat collection device is in a non-light-gathering state and a wind-proof protection state;
s2, setting working modes of the disc type photo-thermal coupling gas Stirling power generation system according to weather conditions and illumination conditions, wherein the working modes comprise a solar thermal power generation mode and a gas combustion thermal power generation mode;
and S3, starting and operating the disc type photo-thermal coupling gas Stirling power generation system according to the working mode of the step S2.
Further, in step S2, when the operating mode is a solar thermal power generation mode, the movable front-located combustion chamber is located at the first position, the disc-type photothermal heat collecting device collects the solar thermal energy, and directly focuses the solar thermal energy on the high-temperature heat absorbing surface to perform illumination heating on the high-temperature heat absorbing surface; when the working mode is a gas combustion heat energy power generation mode, the movable front combustion chamber is located at the second position, a combustion chamber outer cover of the movable front combustion chamber and the high-temperature heat absorption surface jointly surround to form a closed combustion space capable of accommodating a combustion component, and flame generated by the combustion component directly heats the high-temperature heat absorption surface.
Further, the working modes further comprise a short-time pause mode, when the working mode is the short-time pause mode, the movable front combustion chamber is located at the first position, and the positions of the disc type photothermal heat collecting device and the Stirling power generation device are kept fixed.
The invention has the following beneficial effects:
1. the disc-type photo-thermal Stirling generator generates electricity by coupling the fuel gas and heating the fuel gas in cloudy days or at night, so that stable electricity generation output of the Stirling generator is realized.
2. The invention integrates the advantages of photo-thermal Stirling power generation and a gas Stirling generator, and the power generation efficiency is higher than that of a conventional gas internal combustion engine or common photovoltaic power generation equipment.
3. The integrated coupling system is compact in arrangement, installation space is saved, two sets of Stirling power generation and high-temperature heat absorption surfaces are needed in the prior art, and the cost of the integrated system is lower than that of a non-integrated system.
4. According to the invention, through the arrangement mode of the front combustion chamber, the photo-thermal and gas combustion heating adopt the same high-temperature heat absorption surface, so that the structure of the whole power generation system is simple.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the embodiment of the present invention.
Fig. 2 is a schematic structural diagram of embodiment 1 of the present invention.
Fig. 3 is a schematic side view of embodiment 2 of the present invention.
Fig. 4 is a schematic top view of embodiment 2 of the present invention.
Fig. 5 is a schematic diagram illustrating switching of horizontal circumferential rotation positions in embodiment 3 of the present invention.
Fig. 6 is a schematic diagram of switching positions of linear movement according to embodiment 4 of the present invention.
Description of the reference numerals
The solar heat collector comprises a disc-type photo-thermal heat collection device, a movable front combustion chamber, a 3-Stirling power generation device, a 4-supporting and moving mechanism, a gas supply pipeline 21, a combustion chamber outer cover 22, a combustor 23, an igniter 24, a gas nozzle 25, an air nozzle 26, a refractory material layer 27, a hot end 31, a high-temperature heat absorption surface 32, a cold end 33, a first gas nozzle 251, a second gas nozzle 252, a first air nozzle 261, a second air nozzle 262, a second air nozzle P1, a first position P2 and a second position P2.
Detailed Description
The present invention will be further described with reference to the accompanying drawings, and it should be noted that the present embodiment is based on the technical solution, and the detailed implementation and the specific operation process are provided, but the protection scope of the present invention is not limited to the present embodiment.
The embodiment of the invention provides a disc type photo-thermal coupling gas Stirling power generation system which comprises a disc type photo-thermal heat collection device 1, a movable front combustion chamber 2, a Stirling power generation device 3 and a supporting and moving mechanism 4.
The disc type photo-thermal heat collecting device 1 can collect light energy from the sun. The movable pre-combustor 2 is capable of generating thermal energy by combustion. And a hot end 31 and a cold end 33 are respectively arranged on two sides of the Stirling power generation device 3. The Stirling power generation device 3 drives a generator to generate power by using the temperature difference between the hot end 31 and the cold end 33 and the movement of the piston.
The hot end 31 is provided with a high temperature heat absorbing surface 32. The high-temperature heat absorption surface 32 can absorb solar heat energy from the disc type photo-thermal heat collection device 1 or combustion heat from the movable front combustion chamber 2, and transmits the solar heat energy or the combustion heat to the hot end 31, so as to supply energy to the Stirling power generation device 3 for power generation.
In some embodiments of the present invention, the high temperature heat absorption surface 32 includes a high temperature heat collection pipe bundle and a heat transfer working medium disposed inside the high temperature heat collection pipe bundle, and the high temperature heat collection pipe bundle can absorb solar heat energy and/or gas combustion heat energy and transfer the solar heat energy and/or gas combustion heat energy to the hot end 31 through the heat transfer working medium.
The supporting and moving mechanism 4 is used for driving the movable front combustion chamber 2 to move in position. Specifically, the movable pre-combustion chamber 2 is fixedly mounted on the supporting and moving mechanism 4. The support movement mechanism 4 brings the movable forward combustion chamber 2 to switch between a first position P1 and a second position P2. The disc type photo-thermal heat collection device 1 can move along with the vision condition, and the disc type photo-thermal heat collection device 1 and the Stirling power generation device 3 keep relatively static when moving.
When the illumination is sufficient, the disc type photo-thermal coupling gas Stirling power generation system generates power by solar heat, the movable front combustion chamber 2 is located at the first position P1, at the moment, the high-temperature heat absorption surface 32 is arranged opposite to the disc type photo-thermal heat collection device 1, the movable front combustion chamber 2 cannot shield the high-temperature heat absorption surface 32, and the high-temperature heat absorption surface 32 receives solar heat from the disc type photo-thermal heat collection device 1 and transfers the solar heat to the hot end 31.
When the illumination is insufficient due to weather and environmental factors such as overcast and rainy or night, the disc type photo-thermal coupling gas Stirling power generation system generates power by using gas combustion heat energy, the movable front combustion chamber 2 is located at the second position P2, and at the moment, the high-temperature heat absorption surface 32 is located between the movable front combustion chamber 2 and the Stirling power generation device 3. Specifically, the movable forward combustion chamber 2 includes a combustion chamber housing 22 and a combustion component located inside the combustion chamber housing 22. When the movable pre-combustion chamber 2 is located at the second position P2, the high temperature heat absorption surface 32 and the movable pre-combustion chamber 2 are oppositely arranged and jointly form a closed space. Namely: the combustion chamber housing 22 and the high temperature heat absorbing surface 32 together surround a closed combustion space capable of accommodating the combustion component. The exterior of the combustor casing 22 is provided with a layer 27 of refractory material. The combustion component is capable of providing a flame for heating the high temperature heat sink surface 32. The fuel gas provided by the combustion part comprises at least one of natural gas, hydrogen, biomass gas, coke oven gas, methane gas and ammonia gas. The combustion part may be a burner 23 communicating with the gas supply line 21. The combustion means may also be an igniter 24 and a plurality of gas nozzles 25 and air nozzles 26 around the igniter 24. The high temperature heat absorbing surface 32 receives the gas combustion heat energy from the movable pre-combustor 2 and transfers the gas combustion heat energy to the hot end 31.
In the embodiment of the invention, the disc type photo-thermal heat collection device 1 and the Stirling power generation device 3 rotate or move along with the sunlight, so that the disc type photo-thermal coupling gas Stirling power generation system can generate power by solar heat when the illumination is sufficient, the position is timely adjusted according to the movement of the solar direction, and the light energy collection efficiency is ensured. In addition, the support moving mechanism 4 drives the movable pre-combustion chamber 2 to move, when the light is insufficient, the movable pre-combustion chamber 2 can be adjusted from the first position P1 to the second position P2, and the stirling power generation device 3 generates power by using the heat energy generated by the combustion of the gas, so that the stable power generation output of the stirling generator can be realized through the embodiment of the invention.
In some embodiments of the present invention, the cold end 33 is connected to a heat dissipation mechanism, which is an air cooling device or a water cooling device. Through the setting of heat dissipation mechanism, can increase the hot junction 31 with the temperature difference between the cold junction 33 improves the generating efficiency.
In some embodiments of the present invention, the movable pre-combustor 2 is provided with an igniter 24 inside, and the igniter 24 is provided with a gas nozzle 25 and an air nozzle 26 around the igniter 24. When the lighting is insufficient due to weather and environmental factors such as overcast and rainy or night, the supporting and moving mechanism 4 drives the movable front combustion chamber 2 to move from the first position P1 to the second position P2. The igniter 24 is started, the gas nozzle 25 and the air nozzle 26 respectively eject gas and air, flame is generated to heat the high-temperature heat absorption surface 32, and the Stirling power generation device 3 generates power.
Preferably, the number of the gas nozzles 25 and the air nozzles 26 is plural. Further preferably, the gas nozzle 25 and the air nozzle 26 are spaced apart from each other. The interior of the movable pre-combustor 2 forms a swirling flow by a plurality of the gas nozzles 25 and the air nozzles 26 disposed at intervals from each other, thereby improving combustion efficiency.
The disc type photo-thermal coupling gas Stirling power generation system provided by the embodiment of the invention generates power by the following steps:
s1, setting the disc type photo-thermal coupling gas Stirling power generation system to be in an initial state, wherein in the initial state, the whole system is in a non-power generation protection state, the movable front combustion chamber 2 is located at the first position P1, and the disc type photo-thermal heat collection device 1 is in a non-light-gathering state and a wind-proof protection state;
s2, setting working modes of the disc type photo-thermal coupling gas Stirling power generation system according to weather conditions and illumination conditions, wherein the working modes comprise a solar thermal power generation mode and a gas combustion thermal power generation mode;
and S3, starting and operating the disc type photo-thermal coupling gas Stirling power generation system according to the working mode of the step S2.
In step S2, when the lighting and other climate conditions meet the power generation requirement, the operating mode is a solar thermal power generation mode. Before the solar thermal power generation mode is started, firstly checking whether the disc type photo-thermal coupling gas Stirling power generation system meets the working conditions of the solar thermal power generation mode, wherein the working conditions of the solar thermal power generation mode comprise: the disc-type mirror surface of the disc-type photo-thermal heat collection device 1 is ensured to be in a light condensation state, the Stirling power generation device 3 is set to be in a power generation working state, the internal circulation work quality of the Stirling power generation device 3 is sufficient, the cold end 33 of the Stirling power generation device 3 is well cooled, and the temperature of the high-temperature heat absorption surface 32 and other related working conditions are met. After the conditions are met, the movable front combustion chamber 2 is adjusted to be located at the first position P1 by the supporting and moving mechanism 4, and the disc type photothermal heat collecting device 1 and the stirling power generation device 3 are driven by the supporting and moving mechanism 4 to rotate in the horizontal direction according to the illumination direction, so that solar heat is absorbed for power generation.
In step S2, when the lighting and other climate conditions do not satisfy the power generation requirement, the operation mode is a gas combustion heat energy power generation mode. When the working mode is a gas combustion heat energy power generation mode, firstly checking whether the disc type photo-thermal coupling gas Stirling power generation system meets the working conditions of the gas combustion heat energy power generation mode, wherein the working conditions of the gas combustion heat energy power generation mode comprise: the gas supply pressure of the movable pre-combustion chamber 2 and the igniter 24 or the burner 25 meet working conditions, the stirling power generation device 3 is set to be in a power generation working state, the quality of the circulating work in the stirling power generation device 3 is sufficient, the cold end 33 of the stirling power generation device 3 is well cooled, and the temperature of the high-temperature heat absorption surface 32 and other relevant working conditions meet. After the above conditions are ensured to be met, the movable pre-combustion chamber 2 is adjusted to be located at the second position P2 by the supporting and moving mechanism 4, the combustion chamber cover 22 of the movable pre-combustion chamber 2 and the high-temperature heat absorption surface 32 together surround to form a closed combustion space capable of accommodating combustion components, and the flame generated by the combustion components directly heats the high-temperature heat absorption surface 32. The disc type photo-thermal heat collection device 1 and the Stirling power generation device 3 stop rotating, the high-temperature heat absorption surface 32 is located between the movable front combustion chamber 2 and the Stirling power generation device 3, the igniter 24 or the combustor 25 ignites, flame stably heats the high-temperature heat absorption surface 32, the system starts to burn and supplement heat for power generation, and electric power generated by the disc type photo-thermal coupling gas Stirling power generation system can be transmitted to users or transmitted to a power grid.
Preferably, the operating modes further include a brief pause mode, which is performed when the lighting conditions temporarily do not meet the power generation requirements, but the situation is likely to change within a short time, such as a rain shower or a brief cloudy day. When the working mode is the short-time pause mode, the movable front combustion chamber 2 is located at the first position P1, and the positions of the disc type photothermal heat collecting device 1 and the stirling power generation device 3 are kept fixed. At the moment, the disc type photo-thermal coupling gas Stirling power generation system does not start a protection function, so that the system can be rapidly switched to a solar thermal power generation mode when the illumination condition is recovered.
Example 1
As shown in fig. 1-2, the disc-type photothermal coupling gas stirling power generation system of the present embodiment includes a disc-type photothermal heat collection device 1, a movable pre-combustion chamber 2, a stirling power generation device 3, and a support moving mechanism 4.
The two sides of the Stirling power generation device 3 are respectively provided with a hot end 31 and a cold end 33, and the hot end 31 is provided with a high-temperature heat absorption surface 32.
The movable pre-combustion chamber 2 is fixedly mounted on the supporting and moving mechanism 4, and the supporting and moving mechanism 4 drives the movable pre-combustion chamber 2 to switch between a first position P1 and a second position P2.
In the present embodiment, the first position P1 where the movable pre-combustor 2 is located refers to: the movable front combustion chamber 2 is positioned at the lower end of the Stirling power generation device 3 and is perpendicular to the Stirling power generation device 3. The second position P2 of the movable pre-combustion chamber 2 is: the movable front combustion chamber 2 and the Stirling power generation device 3 are buckled with each other, and the open end of the movable front combustion chamber 2 is opposite to the high-temperature heat absorption surface 32. The switching between the first position P1 and the second position P2 is achieved by a rotation of the movable pre-combustor 2 around a fixed point of 90 °.
When the illumination and other weather conditions meet the power generation requirement, the working mode is a solar thermal power generation mode. The movable pre-combustor 2 is in the first position P1. The supporting and moving mechanism 4 drives the disc type photo-thermal heat collection device 1 and the Stirling power generation device 3 to rotate circumferentially in the horizontal direction, so that solar heat energy is absorbed. The high temperature heat absorbing surface 32 receives solar heat from the disc type photothermal heat collecting device 1 and transfers the solar heat to the hot end 31.
When the illumination and other weather conditions do not meet the power generation requirement, the working mode is a gas combustion heat energy power generation mode. The movable pre-combustor 2 is located at the second position P2, and the high temperature heat absorption surface 32 receives the gas combustion heat energy from the movable pre-combustor 2 and transfers the gas combustion heat energy to the hot end 31.
The movable pre-combustion chamber 2 comprises a combustion chamber outer cover 22 and a refractory material layer 27 positioned outside the combustion chamber outer cover 22, a combustor 23 is arranged inside the movable pre-combustion chamber 2, and the combustor 23 is communicated with a gas supply pipeline 21 and used for generating flame and adding the flame into the high-temperature heat absorption surface 32.
Example 2
As shown in fig. 3 and 4, the present embodiment is different from embodiment 1 in that the burner 23 inside the movable pre-combustor 2 is replaced with an igniter 24 and a corresponding plurality of gas nozzles 25 or air nozzles 26.
Specifically, the movable front combustion chamber 2 comprises a combustion chamber outer cover 22 and a refractory material layer 27 positioned outside the combustion chamber outer cover 22, an igniter 24 is arranged inside the movable front combustion chamber 2, the igniter 24 is arranged at the center of the bottom of the movable front combustion chamber 2, and the gas nozzle 25 and the air nozzle 26 are arranged around the igniter 24.
The gas nozzle 25 includes a first gas nozzle 251 and a second gas nozzle 252 which are parallel to each other and have opposite nozzle directions, and the air nozzle 26 includes a first air nozzle 261 and a second air nozzle 262 which are parallel to each other and have opposite nozzle directions. The first gas nozzle 251 and the first air nozzle 261 are perpendicular to each other in direction, and the distances from the igniter 24 to the gas inlets of the first gas nozzle 251, the first air nozzle 261, the second gas nozzle 252 and the second air nozzle 262 near the one end of the igniter 24 are equal.
Thus, the gas inlet of the first gas nozzle 251 near the igniter 24, the gas inlet of the first air nozzle 261 near the igniter 24, the gas inlet of the second gas nozzle 252 near the igniter 24, and the gas inlet of the second air nozzle 262 near the igniter 24 are connected to form a square structure centered on the igniter 24.
With the above configuration, the air supply direction of the gas nozzle 25 is perpendicular to the air supply direction of the air nozzle 26. For example, the first gas nozzle 251, the first air nozzle 261, the second gas nozzle 252, and the second air nozzle 262, which are provided at intervals with respect to the igniter 24 as a total number of four, can form cyclone combustion with a tangential cyclone inside the movable pre-combustion chamber 2, thereby improving combustion efficiency.
Through the cyclone burning with the four-corner tangential circle, the high-temperature heat absorption surface 32 and the surrounding combustion chamber housing 22 together form an approximately sealed space, the first gas nozzle 251, the first air nozzle 261, the second gas nozzle 252 and the second air nozzle 262 which are arranged in the form of the four-corner tangential circle are supplied with air at a certain air injection pressure, the igniter is used for ignition, and under the condition of a certain air injection pressure, efficient rapid burning with approximately four-corner tangential circle is formed in the approximately sealed space, so that efficient power generation of the stirling power generation device 3 is realized.
Example 3
In the present embodiment, the movable pre-combustor 2 is moved in a circular rotation around a fixed axis, as shown in fig. 5. Specifically, the movable front combustion chamber 2 is moved by the supporting and moving mechanism 4 along a fixed point, which is an axial direction, from the first position P1 to the second position P2 through a counterclockwise circumferential rotation of 90 ° or from the second position P2 to the first position P1 through a clockwise circumferential rotation of 90 °.
Example 4
As shown in fig. 6, in the present embodiment, the movable pre-combustor 2 moves in a linear direction.
For example, the first position P1 where the movable pre-combustion chamber 2 is located is: the movable front combustion chamber 2 is positioned at the lower end of the Stirling power generation device 3 and is parallel to the Stirling power generation device 3. The second position P2 of the movable pre-combustion chamber 2 is: the movable front combustion chamber 2 and the Stirling power generation device 3 are buckled with each other, and the open end of the movable front combustion chamber 2 is opposite to the high-temperature heat absorption surface 32. The switching between the first position P1 and the second position P2 is effected by the movable pre-combustor 2 moving up and down.
The movable front combustion chamber 2 moves up and down along the vertical direction under the action of the supporting and moving mechanism 4. In the solar thermal power generation mode, the movable pre-combustion chamber 2 is located below the stirling power generation device 3, and in the gas combustion thermal power generation mode, the movable pre-combustion chamber 2 is horizontally collinear with and located opposite to the stirling power generation device 3. When the solar thermal power generation mode needs to be switched to the gas combustion thermal power generation mode, the movable front combustion chamber 2 is moved from the lower position to the upper position opposite to and parallel to the stirling power generation device 3 in the horizontal direction through the vertical upward movement. When the gas combustion heat energy power generation mode needs to be switched to the solar heat energy power generation mode, the movable front combustion chamber 2 moves vertically downwards from the upper position to the lower position lower than the Stirling power generation device 3.
Alternatively, the first position P1 where the movable pre-combustor 2 is located refers to: the movable front combustion chamber 2 is positioned on the left side or the right side of the Stirling power generation device 3 and is parallel to the Stirling power generation device 3. The second position P2 of the movable pre-combustion chamber 2 is: the movable front combustion chamber 2 and the Stirling power generation device 3 are buckled with each other, and the open end of the movable front combustion chamber 2 is opposite to the high-temperature heat absorption surface 32. The switching between the first position P1 and the second position P2 is effected by the movable pre-combustor 2 moving left and right.
The movable front combustion chamber 2 moves left and right in the horizontal direction under the action of the supporting and moving mechanism 4. In the solar thermal power generation mode, the movable pre-combustion chamber 2 and the stirling power generation device 3 are horizontally parallel to each other but are offset from each other, and in the gas combustion thermal power generation mode, the movable pre-combustion chamber 2 and the stirling power generation device 3 are horizontally parallel to each other and are opposed to each other. When the solar thermal power generation mode and the gas combustion thermal power generation mode need to be switched, the movable front combustion chamber 2 moves left and right in the horizontal direction, and position adjustment is achieved.
Various corresponding changes and modifications can be made by those skilled in the art based on the above technical solutions and concepts, and all such changes and modifications should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a dish formula light and heat coupling gas stirling power generation system which characterized in that includes:
the device comprises a disc type photo-thermal heat collection device (1), a movable front combustion chamber (2), a Stirling power generation device (3) and a supporting and moving mechanism (4);
a hot end (31) and a cold end (33) are respectively arranged on two sides of the Stirling power generation device (3), and the hot end (31) is provided with a high-temperature heat absorption surface (32);
the movable front combustion chamber (2) is fixedly arranged on the supporting and moving mechanism (4), and the supporting and moving mechanism (4) drives the movable front combustion chamber (2) to switch between a first position (P1) and a second position (P2);
when the movable front combustion chamber (2) is located at the first position (P1), the high-temperature heat absorption surface (32) receives solar heat energy from the disc type photothermal heat collection device (1) and transfers the solar heat energy to the hot end (31);
when the movable pre-combustion chamber (2) is located at the second position (P2), the high-temperature heat absorption surface (32) receives gas combustion heat energy from the movable pre-combustion chamber (2) and transmits the gas combustion heat energy to the hot end (31).
2. The disc type photo-thermal coupling gas Stirling power generation system according to claim 1, wherein a heat dissipation mechanism is connected to the cold end (33), and the heat dissipation mechanism is an air cooling device or a water cooling device.
3. The dish-type photothermal coupling gas stirling power generation system according to claim 1, wherein the movable pre-combustor (2) comprises a combustor housing (22) and a combustion component inside the combustor housing (22).
4. The disc type photothermal coupling gas stirling power generation system according to claim 3, wherein when said movable pre-combustor (2) is in said first position (P1), said disc type photothermal heat collecting device (1) directly transfers said solar thermal energy to said high temperature heat absorbing surface (32); when the movable front combustion chamber (2) is located at the second position (P2), the combustion chamber outer cover (22) and the high-temperature heat absorption surface (32) jointly surround and form a closed combustion space capable of containing the combustion component.
5. The disc type photothermal coupling gas stirling power generation system according to claim 3, wherein the combustion part is a burner (23); the burner (23) is communicated with the gas supply pipeline (21).
6. The disc type photothermal coupling gas stirling power generation system according to claim 3, wherein the combustion part is an igniter (24) and a plurality of gas nozzles (25) and air nozzles (26) surrounding the igniter (24).
7. The disc-type photothermal coupling gas stirling power generation system according to claim 3, wherein the movable pre-combustor (2) further comprises a refractory layer (27) disposed outside the combustor casing (22).
8. A power generation method using the disc type photothermal coupling gas stirling power generation system defined in any one of claims 1 to 7, comprising the steps of:
s1, setting the disc type photo-thermal coupling gas Stirling power generation system to be in an initial state, wherein in the initial state, the movable front combustion chamber (2) is located at a first position (P1), and the disc type photo-thermal heat collection device (1) is in a non-light-gathering state and a wind-proof protection state;
s2, setting working modes of the disc type photo-thermal coupling gas Stirling power generation system according to weather conditions and illumination conditions, wherein the working modes comprise a solar thermal power generation mode and a gas combustion thermal power generation mode;
and S3, starting and operating the disc type photo-thermal coupling gas Stirling power generation system according to the working mode of the step S2.
9. The method for generating power by a disc type photothermal coupling gas Stirling power generation system according to claim 8, wherein in step S2, when the operation mode is a solar thermal power generation mode, the movable pre-combustion chamber (2) is located at the first position (P1), the disc type photothermal heat collecting device (1) collects the solar thermal energy and focuses the solar thermal energy directly on the high temperature heat absorbing surface (32) to perform illumination heating on the high temperature heat absorbing surface (32); when the working mode is a gas combustion heat energy power generation mode, the movable front combustion chamber (2) is located at the second position (P2), a combustion chamber outer cover (22) of the movable front combustion chamber (2) and the high-temperature heat absorption surface (32) jointly surround to form a closed combustion space capable of containing a combustion component, and flame generated by the combustion component directly heats the high-temperature heat absorption surface (32).
10. The method for generating power by using a disc type photo-thermal coupling gas Stirling power generation system according to claim 8, wherein the operation modes further comprise a short pause mode, when the operation mode is the short pause mode, the movable front combustion chamber (2) is located at the first position (P1), and the positions of the disc type photo-thermal heat collection device (1) and the Stirling power generation device (3) are kept fixed.
CN201811030016.1A 2018-09-04 2018-09-04 Disc type photo-thermal coupling gas Stirling power generation system and power generation method Pending CN110873028A (en)

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