CN111786616A - Phase-change heat-storage concentrating photovoltaic thermoelectric power generation system and method based on thermosiphon effect - Google Patents

Phase-change heat-storage concentrating photovoltaic thermoelectric power generation system and method based on thermosiphon effect Download PDF

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Publication number
CN111786616A
CN111786616A CN202010625982.9A CN202010625982A CN111786616A CN 111786616 A CN111786616 A CN 111786616A CN 202010625982 A CN202010625982 A CN 202010625982A CN 111786616 A CN111786616 A CN 111786616A
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power generation
generation module
water
concentrating photovoltaic
heat
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CN111786616B (en
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姚海沉
蒲文灏
邢小龙
韩东
岳晨
何纬峰
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Nanjing University of Aeronautics and Astronautics
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Nanjing University of Aeronautics and Astronautics
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02SGENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S10/00PV power plants; Combinations of PV energy systems with other systems for the generation of electric power
    • H02S10/10PV power plants; Combinations of PV energy systems with other systems for the generation of electric power including a supplementary source of electric power, e.g. hybrid diesel-PV energy systems
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24SSOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S60/00Arrangements for storing heat collected by solar heat collectors
    • F24S60/10Arrangements for storing heat collected by solar heat collectors using latent heat
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02NELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
    • H02N11/00Generators or motors not provided for elsewhere; Alleged perpetua mobilia obtained by electric or magnetic means
    • H02N11/002Generators
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02SGENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S40/00Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
    • H02S40/20Optical components
    • H02S40/22Light-reflecting or light-concentrating means
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02SGENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S40/00Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
    • H02S40/40Thermal components
    • H02S40/44Means to utilise heat energy, e.g. hybrid systems producing warm water and electricity at the same time
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/40Solar thermal energy, e.g. solar towers
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy
    • Y02E10/52PV systems with concentrators
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/60Thermal-PV hybrids

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

Abstract

The invention discloses a phase-change heat-storage concentrating photovoltaic thermoelectric power generation system and method based on a thermosiphon effect, wherein the power generation system comprises a base, a first supporting rod, a second supporting rod, a shell, a water tank, a shell, a spherical lens, a concentrating photovoltaic power generation module, a thermoelectric power generation module, a guide rail, a sliding block, a USB interface and a water-cooling heat exchanger; the concentrating photovoltaic power generation module efficiently converts solar energy into electric energy, and converts the rest into heat energy; the temperature difference power generation module converts part of high-quality heat energy into electric energy, and transmits the rest low-quality heat energy to the water-cooling radiator; the water cooled heat sink stores low quality thermal energy in sensible heat form in the water and latent heat form in the phase change material particles. The solar energy is utilized in a gradient mode, the generated electric energy charges various electronic products through the USB interface, and the generated heat can be used for life needs.

Description

Phase-change heat-storage concentrating photovoltaic thermoelectric power generation system and method based on thermosiphon effect
Technical Field
The invention relates to a novel solar cascade utilization device, in particular to a phase-change heat-storage concentrating photovoltaic thermoelectric power generation system and method based on a thermosiphon effect.
Background
With the progress of society and the development of science and technology, electronic products carried by people are more and more abundant. When scientific investigation and camping are carried out in the field, electric energy cannot be obtained to charge various electronic products, so that the light source cannot be lightened, the electronic products cannot communicate with the outside, and great inconvenience is brought to life.
It is difficult to obtain enough hot water to meet the needs of life when camping in the open air. Therefore, a heat source is required to supply hot water and the like required for field life.
Concentrated photovoltaic cells are capable of achieving a relatively high conversion efficiency, and the fraction that is not converted into electrical energy is dissipated as thermal energy and is not utilized sufficiently well.
The high-efficiency thermoelectric generation technology (Seebeck effect) can convert high-quality heat energy into electric energy and finally transfer low-quality heat energy to cold fluid.
The phase-change heat storage material stores heat by utilizing latent heat, can store a large amount of heat within a melting point temperature range, and has high energy storage density so as to ensure reasonable temperature range and smaller equipment volume.
Although some people have already studied the combination of concentrated photovoltaic, thermoelectric generation and phase change heat storage, the combination of the thermosiphon effect into which the heat dissipation operates spontaneously has not been proposed.
Disclosure of Invention
The invention aims to solve the technical problem of providing a phase-change heat-storage concentrating photovoltaic thermoelectric power generation system and method based on a thermosiphon effect aiming at the defects involved in the background technology.
The invention adopts the following technical scheme to solve the technical problems
The phase-change heat-storage concentrating photovoltaic thermoelectric power generation system based on the thermosiphon effect comprises a base, a first supporting rod, a second supporting rod, a shell, a water tank, a shell, a spherical lens, a concentrating photovoltaic power generation module, a thermoelectric power generation module, a guide rail, a sliding block, a USB interface and a water-cooling heat exchanger;
the first support rod and the second support rod are both vertically arranged, and the lower ends of the first support rod and the second support rod are fixedly connected with the base;
the shell is fixed at the upper end of the first supporting rod and used for fixing the spherical lens; the guide rail is arranged in the shell, and the shape of the guide rail is matched with that of the lower edge of the spherical lens; the sliding block is arranged on the guide rail, and a locking mechanism is arranged on the sliding block, so that the sliding block can slide or be locked along the guide rail;
the concentrating photovoltaic power generation module, the temperature difference power generation module and the water-cooling heat exchanger are all fixed on the sliding block, wherein the concentrating photovoltaic power generation module is plate-shaped; the hot end of the thermoelectric power generation module is tightly attached to the back of the concentrating photovoltaic module, and the cold end of the thermoelectric power generation module is tightly attached to the water-cooled radiator;
the sliding block is used for adjusting the thermoelectric generation module to enable the front surface of the thermoelectric generation module to be positioned on a light-gathering focus of the spherical lens;
the water tank is fixed at the upper end of the second support rod, a mixed liquid of water and phase-change material particles is arranged in the water tank, and the melting point of the phase-change material particles is lower than the boiling point of the water; the water tank is provided with an inlet and an outlet, the inlet is higher than the outlet, and the outlet and the inlet are respectively communicated with the input port and the output port of the water-cooling heat exchanger in a sealing way through flexible hoses capable of stretching out and drawing back;
the USB interface is arranged on the shell and is electrically connected with the output end of the concentrating photovoltaic power generation module and the output end of the temperature difference power generation module respectively.
As a further optimization scheme of the phase-change heat-storage concentrating photovoltaic thermoelectric power generation system based on the thermosiphon effect, the spherical lens is made of glass or acrylic materials.
As a further optimization scheme of the phase-change heat-storage concentrating photovoltaic temperature difference power generation system based on the thermosiphon effect, the hot end of the temperature difference power generation module is tightly attached to the back of the concentrating photovoltaic module through silver silicone grease, the cold end of the temperature difference power generation module is tightly attached to the water-cooling radiator through silver silicone grease, the hot end of the temperature difference power generation module is fixedly connected with the back of the concentrating photovoltaic module, and the cold end of the temperature difference power generation module is fixedly connected with the water-cooling radiator.
As a further optimization scheme of the phase-change heat-storage concentrating photovoltaic thermoelectric power generation system based on the thermosiphon effect, an inlet of the water tank is arranged at the upper part of the side wall of the water tank, an outlet of the water tank is arranged at the bottom of the water tank, and a mixed liquid of water and phase-change material particles in the water tank submerges the inlet of the water tank.
As a further optimization scheme of the phase-change heat-storage concentrating photovoltaic thermoelectric power generation system based on the thermosiphon effect, the phase-change material particles are less than 100 nm in diameter and are mixed with water to form a colloid.
The invention also discloses a working method of the phase-change heat-storage concentrating photovoltaic thermoelectric power generation system based on the thermosiphon effect, which comprises the following steps:
the sunlight vertically irradiates on the spherical lens; the spherical lens focuses sunlight to the front side of the concentrating photovoltaic power generation module, and the concentrating photovoltaic power generation module converts part of solar energy into electric energy;
the rest energy is converted into heat energy to be transmitted to the hot end of the temperature difference power generation module, and part of the heat energy is converted into electric energy by the temperature difference power generation module;
the remaining heat is transferred to the water-cooled radiator through the cold end of the thermoelectric generation module, the heat is transferred to the mixed liquid of the heating water and the phase-change material particles in the water-cooled radiator to form a density difference, and the density difference of the cold water and the hot water drives the mixed liquid of the water in the flow channel and the phase-change material particles to flow and convey the heat to the mixed liquid in the water tank.
Compared with the prior art, the invention adopting the technical scheme has the following technical effects:
the concentrating photovoltaic power generation module efficiently converts solar energy into electric energy, and converts the rest into heat energy; the temperature difference power generation module converts part of high-quality heat energy into electric energy, and transmits the rest low-quality heat energy to the water-cooling radiator; the water cooled heat sink stores low quality thermal energy in sensible heat form in the water and latent heat form in the phase change material particles. The solar energy is utilized in a gradient mode, the generated electric energy charges various electronic products through the USB interface, and the generated heat can be used for life needs.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the connection between a water-cooled radiator and a water tank;
fig. 3 is a flow chart of the results of a siphon effect simulation.
In the figure, 1-concentrating photovoltaic power generation module, 2-temperature difference power generation module, 3-water cooling radiator, 4-hose, 5-first support rod, 6-slide rail, 7-lead, 8-spherical lens, 9-shell, 10-USB interface, 11-base, 12-water tank, 13-water, 14-phase change material particle, and 15-second support rod.
Detailed Description
The technical scheme of the invention is further explained in detail by combining the attached drawings:
the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, components are exaggerated for clarity.
As shown in fig. 1, the invention discloses a phase-change heat-storage concentrating photovoltaic thermoelectric power generation system based on a thermosiphon effect, which comprises a base, a first supporting rod, a second supporting rod, a shell, a water tank, a shell, a spherical lens, a concentrating photovoltaic power generation module, a thermoelectric power generation module, a guide rail, a sliding block, a USB interface and a water-cooling heat exchanger, wherein the first supporting rod is arranged on the base;
the first support rod and the second support rod are both vertically arranged, and the lower ends of the first support rod and the second support rod are fixedly connected with the base;
the shell is fixed at the upper end of the first supporting rod and used for fixing the spherical lens; the guide rail is arranged in the shell, and the shape of the guide rail is matched with that of the lower edge of the spherical lens; the sliding block is arranged on the guide rail, and a locking mechanism is arranged on the sliding block, so that the sliding block can slide or be locked along the guide rail;
the concentrating photovoltaic power generation module, the temperature difference power generation module and the water-cooling heat exchanger are all fixed on the sliding block, wherein the concentrating photovoltaic power generation module is plate-shaped; the hot end of the thermoelectric power generation module is tightly attached to the back of the concentrating photovoltaic module, and the cold end of the thermoelectric power generation module is tightly attached to the water-cooled radiator;
the sliding block is used for adjusting the thermoelectric generation module to enable the front surface of the thermoelectric generation module to be positioned on a light-gathering focus of the spherical lens;
the water tank is fixed at the upper end of the second support rod, a mixed liquid of water and phase-change material particles is arranged in the water tank, and the melting point of the phase-change material particles is lower than the boiling point of the water; an inlet and an outlet are arranged on the water tank, the inlet is higher than the outlet, and the outlet and the inlet are respectively communicated with an input port and an output port of the water-cooling heat exchanger in a sealing way through a flexible hose, as shown in figure 2;
the USB interface is arranged on the shell and is electrically connected with the output end of the concentrating photovoltaic power generation module and the output end of the temperature difference power generation module respectively.
The spherical lens is made of glass or acrylic materials.
The hot end of the thermoelectric generation module is tightly attached to the back face of the concentrating photovoltaic module through silver silicone grease, the cold end of the thermoelectric generation module is tightly attached to the water-cooled radiator through silver silicone grease, the hot end of the thermoelectric generation module is fixedly connected with the back face of the concentrating photovoltaic module, and the cold end of the thermoelectric generation module is fixedly connected with the water-cooled radiator.
The inlet of the water tank is arranged on the upper part of the side wall of the water tank, the outlet of the water tank is arranged at the bottom of the water tank, and the mixed liquid of water and phase-change material particles in the water tank submerges the inlet of the water tank. The inlet is arranged at a high position, so that siphon flow of water can be facilitated, and the outlet is arranged at the bottom of the water tank, so that the bending number of the water pipe can be reduced, the flow resistance is reduced, and siphon flow is facilitated.
The phase-change material particles are substances capable of absorbing or releasing a large amount of latent heat during conversion between a liquid state and a solid state, and comprise inorganic phase-change materials or organic phase-change materials; wherein the inorganic phase-change material comprises salts, hydrated salts or alloys, and the organic phase-change material comprises paraffin, fatty acids or alcohols and lipids.
The melting point of the phase-change material particles is lower than the boiling point of water, the particle diameter is less than 100 nm within the range of dozens of degrees (different melting temperatures are provided according to different phase-change materials), and the particles are mixed with water to form colloid.
The height of the water tank is slightly higher than that of the water-cooling heat exchanger, so that better conditions are created for siphon effect.
The invention also discloses a working method of the phase-change heat-storage concentrating photovoltaic thermoelectric power generation system based on the thermosiphon effect, which comprises the following steps:
the sunlight vertically irradiates on the spherical lens; the spherical lens focuses sunlight to the front side of the concentrating photovoltaic power generation module, and the concentrating photovoltaic power generation module converts part of solar energy into electric energy;
the rest energy is converted into heat energy to be transmitted to the hot end of the temperature difference power generation module, and part of the heat energy is converted into electric energy by the temperature difference power generation module;
the remaining heat is transferred to the water-cooled radiator through the cold end of the thermoelectric generation module, the heat is transferred to the inside of the water-cooled radiator to heat the mixed liquid of the water and the phase-change material particles to form a density difference, and the density difference of the cold water and the hot water drives the mixed liquid of the water and the phase-change material particles in the flow channel to flow and transfer the heat to the mixed liquid in the water tank, as shown in fig. 3.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only illustrative of the present invention and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (6)

1. The phase-change heat storage concentrating photovoltaic thermoelectric power generation system based on the thermosiphon effect is characterized by comprising a base, a first supporting rod, a second supporting rod, a shell, a water tank, a shell, a spherical lens, a concentrating photovoltaic power generation module, a thermoelectric power generation module, a guide rail, a sliding block, a USB interface and a water-cooling heat exchanger;
the first support rod and the second support rod are both vertically arranged, and the lower ends of the first support rod and the second support rod are fixedly connected with the base;
the shell is fixed at the upper end of the first supporting rod and used for fixing the spherical lens; the guide rail is arranged in the shell, and the shape of the guide rail is matched with that of the lower edge of the spherical lens; the sliding block is arranged on the guide rail, and a locking mechanism is arranged on the sliding block, so that the sliding block can slide or be locked along the guide rail;
the concentrating photovoltaic power generation module, the temperature difference power generation module and the water-cooling heat exchanger are all fixed on the sliding block, wherein the concentrating photovoltaic power generation module is plate-shaped; the hot end of the thermoelectric power generation module is tightly attached to the back of the concentrating photovoltaic module, and the cold end of the thermoelectric power generation module is tightly attached to the water-cooled radiator;
the sliding block is used for adjusting the thermoelectric generation module to enable the front surface of the thermoelectric generation module to be positioned on a light-gathering focus of the spherical lens;
the water tank is fixed at the upper end of the second support rod, a mixed liquid of water and phase-change material particles is arranged in the water tank, and the melting point of the phase-change material particles is lower than the boiling point of the water; the water tank is provided with an inlet and an outlet, the inlet is higher than the outlet, and the outlet and the inlet are respectively communicated with the input port and the output port of the water-cooling heat exchanger in a sealing way through flexible hoses capable of stretching out and drawing back;
the USB interface is arranged on the shell and is electrically connected with the output end of the concentrating photovoltaic power generation module and the output end of the temperature difference power generation module respectively.
2. The system of claim 1, wherein the spherical lens is made of glass or acrylic material.
3. The phase-change heat-storage concentrating photovoltaic thermoelectric generation system based on thermosiphon effect of claim 1, wherein the hot end of the thermoelectric generation module is tightly attached to the back of the concentrating photovoltaic module through silver silicone grease, the cold end of the thermoelectric generation module is tightly attached to the water-cooled radiator through silver silicone grease, and the hot end of the thermoelectric generation module is fixedly connected with the back of the concentrating photovoltaic module, and the cold end of the thermoelectric generation module is fixedly connected with the water-cooled radiator.
4. The system according to claim 1, wherein the inlet of the water tank is disposed at an upper portion of a sidewall of the water tank, the outlet of the water tank is disposed at a bottom of the water tank, and a mixture of water and phase change material particles in the water tank submerges the inlet of the water tank.
5. The system of claim 1, wherein the phase change material particles have a diameter of less than 100 nm and are mixed with water to form a colloid.
6. The operating method of a phase-change heat-storage concentrating photovoltaic thermoelectric power generation system based on the thermosiphon effect as claimed in claim 1, comprising the following steps:
the sunlight vertically irradiates on the spherical lens; the spherical lens focuses sunlight to the front side of the concentrating photovoltaic power generation module, and the concentrating photovoltaic power generation module converts part of solar energy into electric energy;
the rest energy is converted into heat energy to be transmitted to the hot end of the temperature difference power generation module, and part of the heat energy is converted into electric energy by the temperature difference power generation module;
the remaining heat is transferred to the water-cooled radiator through the cold end of the thermoelectric generation module, the heat is transferred to the mixed liquid of the heating water and the phase-change material particles in the water-cooled radiator to form a density difference, and the density difference of the cold water and the hot water drives the mixed liquid of the water in the flow channel and the phase-change material particles to flow and convey the heat to the mixed liquid in the water tank.
CN202010625982.9A 2020-07-01 2020-07-01 Phase-change heat storage concentrating photovoltaic thermoelectric power generation system and method based on thermosiphon effect Active CN111786616B (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103259458A (en) * 2012-02-16 2013-08-21 王广武 Solar thermoelectric power generation system
EP2660880A2 (en) * 2012-05-03 2013-11-06 Hamilton Sundstrand Space Systems International, Inc. Concentrated photovoltaic/quantum well thermoelectric power source
CN104300877A (en) * 2014-09-16 2015-01-21 广东工业大学 Light condensation type solar photovoltaic-thermoelectricity-waste-heat integrated system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103259458A (en) * 2012-02-16 2013-08-21 王广武 Solar thermoelectric power generation system
EP2660880A2 (en) * 2012-05-03 2013-11-06 Hamilton Sundstrand Space Systems International, Inc. Concentrated photovoltaic/quantum well thermoelectric power source
CN104300877A (en) * 2014-09-16 2015-01-21 广东工业大学 Light condensation type solar photovoltaic-thermoelectricity-waste-heat integrated system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
M.J. DEASY等: ""Simulation-driven design of a passive liquid cooling system for a thermoelectric generator"", 《APPLIED ENERGY》, pages 499 *

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