CN-122026796-A - Distributed solar all-weather power generation device based on thermoelectric technology

CN122026796ACN 122026796 ACN122026796 ACN 122026796ACN-122026796-A

Abstract

The invention discloses a distributed solar all-weather power generation device based on a thermoelectric technology, which relates to the field of distributed energy storage and power generation, wherein solar energy is converted into heat energy for storage through matching of a light-following and light-gathering part and a heat storage and exchange part, then the heat energy is conveyed to a thermoelectric power generation part, and the heat energy is converted into electric energy through a thermoelectric device in the thermoelectric power generation part, so that all-weather power generation of equipment is realized through heat storage and thermoelectric power generation; the light-following and light-gathering part is matched with the double-shaft light-following system, so that the angle of the light-gathering part can be adjusted according to the change of the solar altitude and the solar azimuth, the light-gathering part can be vertical to solar rays to the greatest extent, the light-gathering efficiency of the device is improved, the efficient capturing of solar radiation is realized, and the solar energy utilization rate and the power generation effect of the device are improved; by adopting ternary carbonate as a heat storage medium, the heat storage density is high, so that the consumption of heat storage salt required by equipment is greatly reduced, and the volume of the equipment can be further reduced.

Inventors

SONG KUN
Lu Baitong
Liu Hezhongwei
DONG ZELONG
WANG SHUANG

Assignees

南京工业大学

Dates

Publication Date: 20260512
Application Date: 20260402

Claims (10)

1. The distributed solar all-weather power generation device based on the thermoelectric technology is characterized by comprising a light-following and light-gathering part, a heat storage and heat exchange part and a thermoelectric power generation part, wherein the light-following and light-gathering part comprises a light-gathering part and a double-shaft light-following system, the double-shaft light-following system can conduct angle adjustment on the light-gathering part according to the change of a solar altitude angle and a solar azimuth angle so that the light-gathering part can be perpendicular to solar rays, the heat storage and heat exchange part comprises a light-gathering heating part, a heat conveying part and a heat storage part, the light-gathering part can gather sunlight on the light-gathering heating part so that the light-gathering heating part absorbs solar energy to generate heat, and the heat conveying part can convey and store heat in the light-gathering heating part in the heat storage part; The thermoelectric power generation part comprises a thermoelectric device, a heating part and a cooling radiating part, wherein the heating part and the cooling radiating part are respectively arranged at the hot end and the cold end of the thermoelectric device, the heating part is communicated with the heat conveying part, so that the heating part can absorb heat in the concentrating heating part or the heat storage part through the heat conveying part to heat the hot end of the thermoelectric device, the cooling radiating part can radiate heat and cool the cold end of the thermoelectric device so as to form a temperature difference between the hot end and the cold end of the thermoelectric device, and the thermoelectric device can perform thermoelectric conversion under the temperature difference effect.
2. The distributed solar all-weather power generation device based on the thermoelectric technology according to claim 1, wherein the dual-axis light tracking system comprises a bearing seat supporting frame, an altitude angle adjusting unit and an azimuth angle adjusting unit, wherein the altitude angle adjusting unit and the azimuth angle adjusting unit can form two rotating pairs which are vertical in space on the bearing seat supporting frame, the altitude angle adjusting unit can drive a light condensing part to track and adjust according to the change of a solar altitude angle by taking the center of a circle of a bearing seat on the bearing seat supporting frame as a rotation center, the azimuth angle adjusting unit can drive the light condensing part to track and adjust according to the change of a solar azimuth angle by taking the direction perpendicular to the axis of the bearing seat as a rotation center, and the light condensing heating part is arranged on an inner ring of the bearing seat supporting frame.
3. The distributed solar all-weather power generation device based on the thermoelectric technology according to claim 2, wherein the altitude adjustment unit comprises an altitude adjustment rotating shaft, an azimuth angle control motor base, an altitude control motor and an altitude control motor support frame, the azimuth angle control motor base is rotatably mounted on an inner ring of the bearing seat support frame through the altitude adjustment rotating shafts at two ends, the light gathering part is mounted on the azimuth angle control motor base through the azimuth angle adjustment unit, the altitude control motor is mounted on the bearing seat support frame through the altitude control motor support frame, and the altitude control motor can drive the azimuth angle control motor base to rotate and adjust along the solar altitude direction, so that the azimuth angle control motor base drives the azimuth angle adjustment unit and the light gathering part to rotate and adjust along the solar altitude direction; The azimuth angle adjusting unit comprises an azimuth angle adjusting rotating shaft and an azimuth angle control motor, the azimuth angle control motor is fixedly arranged on an azimuth angle control motor base, the azimuth angle adjusting rotating shaft is rotatably arranged on the azimuth angle control motor base, one end of the azimuth angle adjusting rotating shaft is fixedly connected with the light gathering part, and the azimuth angle control motor can drive the light gathering part to rotate and adjust along the azimuth direction of the sun through the azimuth angle adjusting rotating shaft.
4. The distributed solar all-weather power generation device based on the thermoelectric technology according to claim 1, wherein the light condensing part comprises a Fresnel lens frame supporting rod, a Fresnel lens frame and a Fresnel lens, the Fresnel lens frame comprises two groups of arc frames and connecting pieces, the two groups of arc frames are in butt joint through the connecting pieces to form a circular frame structure, the Fresnel lens is fixedly installed in the circular frame structure, one end of the Fresnel lens frame supporting rod is connected with the connecting pieces, and the other end of the Fresnel lens frame supporting rod is connected with the double-shaft light following system.
5. The distributed solar all-weather power generation device based on the thermoelectric technology as claimed in claim 1, wherein the concentrating heating part comprises a concentrating heat exchanger, heat conduction oil is contained in the concentrating heat exchanger, a concentrating heat exchange cover plate is fixedly arranged at the top end of the concentrating heat exchanger, and a plurality of fins immersed in the heat conduction oil are arranged on the bottom surface of the concentrating heat exchange cover plate; The inside of spotlight heat exchanger is provided with the baffle, the baffle separates the inside of spotlight heat exchanger and forms into advance oil cavity and play oil cavity, advance oil cavity and play oil cavity respectively with the both ends intercommunication of heat transport portion, and advance oil cavity and go out the overflow mouth intercommunication on baffle top between the oil cavity.
6. The distributed solar all-weather power generation device based on the thermoelectric technology as claimed in claim 5, wherein the heat storage part comprises a heat storage tank, heat storage salt is stored in the heat storage tank, a plurality of layers of spiral heat exchange coils buried in the heat storage salt are further arranged in the heat storage tank, the heat conveying part is connected between the light gathering heat exchanger and the plurality of layers of spiral heat exchange coils, so that the light gathering heat exchanger, the heat conveying part and the plurality of layers of spiral heat exchange coils are connected to form a circulating conveying oil way, and the heat storage salt is ternary carbonate.
7. The distributed solar all-weather power generation device based on the thermoelectric technology as claimed in claim 6, wherein the heat conveying part comprises an oil outlet pipeline, an oil inlet pipeline and a hot oil pump, one end of the oil outlet pipeline is communicated with an oil outlet cavity in the concentrating heat exchanger, the other end of the oil outlet pipeline is communicated with the inlet end of the multi-layer spiral heat exchange coil, one end of the oil inlet pipeline is communicated with the outlet end of the multi-layer spiral heat exchange coil, the other end of the oil inlet pipeline is communicated with an oil inlet cavity in the concentrating heat exchanger, and the hot oil pump is connected and installed on the oil inlet pipeline.
8. The distributed solar all-weather power generation device based on the thermoelectric technology according to claim 7, wherein the heating part comprises a thermoelectric device heat exchanger, a three-way valve, an oil inlet pipe branch and an oil outlet pipe branch, a heat exchange flow channel is arranged in the thermoelectric device heat exchanger, thermoelectric devices are mounted on two sides of the thermoelectric device heat exchanger in a clinging mode, the three-way valve is mounted on an oil inlet pipe in a connecting mode, one end of the three-way valve is communicated with the oil inlet pipe branch, one end of the oil inlet pipe branch is communicated with an inlet end of the heat exchange flow channel, an outlet end of the heat exchange flow channel is communicated with the oil outlet pipe branch, and one end of the oil outlet pipe branch is communicated with the oil outlet pipe.
9. The distributed solar all-weather power generation device based on the thermoelectric technology as claimed in claim 8, wherein the cooling and radiating part comprises a cold row and two water cooling plates, the two water cooling plates are respectively and closely arranged at cold ends of the two thermoelectric devices, a radiating runner and a cooling runner are respectively arranged in the cold row and the water cooling plates, a water outlet and a water inlet which are respectively communicated with two ends of the radiating runner are arranged on the cold row, the water outlet is communicated with an inlet of the cooling runner through a cooling water supply pipeline, the water inlet is communicated with an inlet of the cooling runner through a hot water return pipeline, so that the radiating runner, the cooling water supply pipeline, the cooling runner and the hot water return pipeline are sequentially communicated to form a circulating radiating pipeline, and a water pump is further connected and arranged on the water outlet.
10. The distributed solar all-weather power generation device based on the thermoelectric technology according to any one of claims 1 to 9, further comprising an intelligent control system, a solar sensor and a temperature sensor, wherein the solar sensor is used for detecting a solar azimuth angle and a solar elevation angle, the temperature sensor is used for detecting a temperature of a heat storage part, the intelligent control system can drive the light-following light-gathering part to light and gather light for sunlight according to the solar azimuth angle and the solar elevation angle detected by the solar sensor, and the intelligent control system can adjust a conveying path between the heat conveying part and the light-gathering heating part and the heat storage part according to the temperature of the heat storage part detected by the temperature sensor so as to realize all-weather power generation of the thermoelectric device.

Description

Distributed solar all-weather power generation device based on thermoelectric technology Technical Field The invention belongs to the field of distributed energy storage power generation, and particularly relates to a distributed solar all-weather power generation device based on a thermoelectric technology. Background Solar energy is one of the most abundant and most potential clean energy sources on the earth, but the inherent day and night and season intermittence and weather dependence cause unstable power supply at night and in overcast and rainy days, and become a main obstacle for large-scale application. At present, the technical path for solving the intermittent problem mainly comprises two modes of photo-thermal power generation and photovoltaic and energy storage, however, both have technical bottlenecks and cost constraints, and limit the wide application of the photovoltaic energy storage system in a large-scale energy system. The photo-thermal power generation is a solid-state energy conversion technology for directly converting heat energy into electric energy through a thermoelectric device, has the outstanding advantages of high power density, wide applicable temperature range, simple structure, no moving parts, quiet and reliable operation and the like, and has been applied to the fields of aerospace deep space exploration, medical equipment, industrial waste heat recovery and the like. However, the solar all-weather power generation system is introduced into the solar all-weather power generation system, and multiple challenges are faced, namely, firstly, the light condensation efficiency of the existing single-axis light following system is limited, the solar radiation is difficult to capture efficiently, secondly, the energy storage density of a common heat storage medium such as solar salt is low, a large amount of molten salt materials are needed for realizing long-time energy storage, the system volume and the cost are improved, and finally, the conversion efficiency of the thermoelectric material is still low, and the reasonable and stable temperature difference is needed to be maintained for efficient power generation, so that higher requirements are put on the thermal management design of the system. Disclosure of Invention Aiming at the problems in the related art, the invention provides a distributed solar all-weather power generation device based on a thermoelectric technology, which aims to overcome the technical problems existing in the related art. In order to solve the technical problems, the invention is realized by the following technical scheme: The invention relates to a distributed solar all-weather power generation device based on a thermoelectric technology, which comprises a light-following and light-gathering part, a heat storage and heat exchange part and a thermoelectric power generation part, wherein the light-following and light-gathering part comprises a light-gathering part and a double-shaft light-following system, the double-shaft light-following system can conduct angle adjustment on the light-gathering part according to the change of a solar altitude angle and a solar azimuth angle so as to enable the light-gathering part to be vertical to solar rays to the greatest extent, the heat storage and heat exchange part comprises a light-gathering heating part, a heat conveying part and a heat storage part, the light-gathering part can gather sunlight on the light-gathering heating part so as to enable the light-gathering heating part to absorb solar energy to generate heat, and the heat conveying part can convey and store heat in the light-gathering heating part in the heat storage part; The thermoelectric power generation part comprises a thermoelectric device, a heating part and a cooling radiating part, wherein the heating part and the cooling radiating part are respectively arranged at the hot end and the cold end of the thermoelectric device, the heating part is communicated with the heat conveying part, so that the heating part can absorb heat in the concentrating heating part or the heat storage part through the heat conveying part to heat the hot end of the thermoelectric device, the cooling radiating part can radiate heat and cool the cold end of the thermoelectric device so as to form a temperature difference between the hot end and the cold end of the thermoelectric device, and the thermoelectric device can perform thermoelectric conversion under the temperature difference effect. Preferably, the dual-axis light-following system comprises a bearing seat supporting frame, a height angle adjusting unit and an azimuth angle adjusting unit, wherein the height angle adjusting unit and the azimuth angle adjusting unit can form two rotating pairs which are vertical to each other in space on the bearing seat supporting frame, the height angle adjusting unit can track and adjust a light condensing part according to the change of a solar height angle by taking