CN116015104A - Thermoelectric power generation module and device oriented to gas-heat environment - Google Patents
Thermoelectric power generation module and device oriented to gas-heat environment Download PDFInfo
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- CN116015104A CN116015104A CN202211558765.8A CN202211558765A CN116015104A CN 116015104 A CN116015104 A CN 116015104A CN 202211558765 A CN202211558765 A CN 202211558765A CN 116015104 A CN116015104 A CN 116015104A
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- 238000010248 power generation Methods 0.000 title claims abstract description 42
- 239000000758 substrate Substances 0.000 claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 230000005611 electricity Effects 0.000 claims abstract description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 11
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 11
- 239000004519 grease Substances 0.000 claims description 10
- 229920001296 polysiloxane Polymers 0.000 claims description 10
- 229910001220 stainless steel Inorganic materials 0.000 claims description 10
- 239000010935 stainless steel Substances 0.000 claims description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 7
- 229910052802 copper Inorganic materials 0.000 claims description 7
- 239000010949 copper Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 7
- 229910052797 bismuth Inorganic materials 0.000 claims description 5
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 claims description 5
- XSOKHXFFCGXDJZ-UHFFFAOYSA-N telluride(2-) Chemical compound [Te-2] XSOKHXFFCGXDJZ-UHFFFAOYSA-N 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 239000006260 foam Substances 0.000 claims description 2
- GPMBECJIPQBCKI-UHFFFAOYSA-N germanium telluride Chemical compound [Te]=[Ge]=[Te] GPMBECJIPQBCKI-UHFFFAOYSA-N 0.000 claims description 2
- 229910002804 graphite Inorganic materials 0.000 claims description 2
- 239000010439 graphite Substances 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- OCGWQDWYSQAFTO-UHFFFAOYSA-N tellanylidenelead Chemical compound [Pb]=[Te] OCGWQDWYSQAFTO-UHFFFAOYSA-N 0.000 claims description 2
- 239000000498 cooling water Substances 0.000 abstract description 7
- 238000006243 chemical reaction Methods 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 5
- 238000012986 modification Methods 0.000 abstract description 3
- 230000004048 modification Effects 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 6
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 6
- 229910052737 gold Inorganic materials 0.000 description 6
- 239000010931 gold Substances 0.000 description 6
- 238000004806 packaging method and process Methods 0.000 description 5
- 238000003825 pressing Methods 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000005678 Seebeck effect Effects 0.000 description 1
- 241000276425 Xiphophorus maculatus Species 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
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Abstract
The invention discloses a thermoelectric power generation module and a thermoelectric power generation device oriented to a gas-heat environment, which belong to the field of thermoelectric power generation, wherein the module comprises: a cold end structure having a flow passage for cold water circulation; the heat collection structure comprises a heat collection substrate and a plurality of heat collection fins which are arranged on the heat collection substrate in parallel; and the thermoelectric device is positioned between the cold end structure and the heat collecting substrate and generates electricity through the temperature difference of the cold end structure and the heat collecting substrate. The temperature difference power generation module facing the gas-heat environment can be directly placed in the gas-heat environment, high temperature difference is established through high-efficiency collection of heat energy and cooling water, low-grade heat energy is converted into high-grade electric energy through a thermoelectric conversion technology, modification of existing projects such as a flue and the like is avoided, high economy and practicality are achieved, and the temperature difference power generation device facing the gas-heat environment can optimize a module structure and expand and integrate according to actual use scenes and is suitable for engineering application.
Description
Technical Field
The application relates to a thermoelectric generation module and device towards hot environment, belongs to thermoelectric generation field.
Background
There are a great deal of gas-heat environments in industries such as power plants, petrifaction and the like, such as flue of power plants, distillation tower gas-heat environments of chemical plants and the like. The gas-heat environment temperature is generally below 150 ℃, and the gas-heat environment temperature belongs to low-temperature heat sources, and the scenes all need to be subjected to cooling treatment to improve the heat efficiency, so that a large-scale cooling water system is usually arranged in a factory. The scene has stable heat source and cold source, and is very suitable for thermoelectric generation technology. The thermoelectric generation technology is based on the Seebeck effect of the semiconductor thermoelectric material, and is capable of directly converting heat energy into electric energy, and has great advantages in the aspect of low-grade waste heat recovery.
The conventional thermoelectric power generation device usually needs to be modified on a flue to lead out high-temperature flue gas to flow through the power generation device, so that higher engineering cost is generated.
Disclosure of Invention
For solving the problem that engineering cost is big when generating set uses in the current gas thermal environment, this application provides a temperature difference power generation module and device towards gas thermal environment, this temperature difference power generation module and device can directly place in the atmospheric thermal environment of the large space in the industry process flows such as power plant, petrochemical industry, establishes high difference in temperature through high-efficient collection heat energy and cooling water, converts heat energy into the electric energy.
In a first aspect, the present invention provides a thermoelectric power generation module facing a thermal environment, applied to the thermal environment, including:
a cold end structure having a flow passage for cold water circulation;
the heat collection structure comprises a heat collection substrate and a plurality of heat collection fins which are arranged on the heat collection substrate in parallel; and
And the thermoelectric device is positioned between the cold junction structure and the heat collecting substrate and generates electricity through the temperature difference of the cold junction structure and the heat collecting substrate.
Optionally, the thermoelectric generation module further comprises a flexible heat conduction layer, and the flexible heat conduction layer is arranged between the contact surface of the heat collection substrate and the cold end structure and/or between the contact surface of the thermoelectric device and the cold end structure.
Preferably, the flexible heat conduction layer comprises one or more of graphite paper, heat conduction silicone grease, foam copper and silicone grease pads, so that the contact compactness between the cold and hot ends and the thermoelectric device is improved, and the contact thermal resistance of the system is reduced.
Optionally, the thermoelectric power generation module further comprises a packaging structure which is wrapped and arranged on the cold end structure and the outer surface of the thermoelectric device, and the packaging structure can effectively prevent high-temperature gas heat from exchanging heat with the side surface of the device and the cold end, so that the heat insulation effect is achieved, meanwhile, the device circuit is protected, and the corrosion of smoke to the circuit is avoided.
Optionally, the two heat collecting structures are symmetrically arranged at two opposite outer sides of one cold end structure.
Optionally, the heat collecting device further comprises a fastener for fastening the heat collecting substrates of the two heat collecting structures, the fastener plays a role in mechanical fixing and pressing the device, and the contact compactness of the device with the cold and hot ends is further improved by applying the pressure of less than 80 MPa.
Preferably, the fastener comprises a stud and a nut.
Optionally, the heat collecting structure material comprises aluminum, copper or stainless steel.
Preferably, the height of the heat collecting fins is 10mm-100mm.
Preferably, the distance between the heat collecting fins is 1mm-5mm.
Preferably, the thickness of the heat collecting substrate is 3mm-20mm.
The height of the fins, the thickness of the substrate and the distance between the fins can be adjusted according to the use requirement, so that pressure drop, heat transfer efficiency, heat resistance distribution and the like are optimized, and the optimal heat exchange capacity is obtained.
Optionally, the cold junction structure includes the cold water board, and equidistant setting fin on the platy structure can effectively reduce the volume, realizes space utilization maximize, can absorb more heat in limited space, has reduced the heat loss in the aero-thermal environment.
Preferably, the height of the cold water plate is 5-20mm.
Preferably, the flow channel is single-pass, U-shaped or S-shaped.
Preferably, the cold end structure material comprises aluminum, copper or stainless steel.
Optionally, the thermoelectric device particles comprise one or more of bismuth telluride based, lead telluride based, germanium telluride based, and skutterudite materials.
Alternatively, the thermoelectric device structure may be a pi-shaped flat plate structure.
In a second aspect, the invention also provides a thermoelectric power generation device facing the gas-heat environment, which is integrated by at least two cold end structures and four heat collection structures.
Optionally, the device further comprises an assembly frame for positioning the thermoelectric power generation module, namely, each cold end structure and each heat collecting structure are fixed and positioned by the assembly frame, the power generation module can be assembled and integrated according to the scene size and the use requirement, the high integration level of the whole device is ensured, and engineering application is facilitated.
The beneficial effects that this application can produce include:
1) The thermoelectric power generation module facing the gas-heat environment can be directly placed in the gas-heat environment, a high temperature difference is established by efficiently collecting heat energy and cooling water, low-grade heat energy is converted into high-grade electric energy through a thermoelectric conversion technology, modification of existing projects such as a flue and the like is avoided, and the thermoelectric power generation module has high economical efficiency and practicability;
2) The thermoelectric power generation device facing the gas-heat environment can optimize the module structure and expand and integrate according to actual use scenes, and is suitable for engineering application.
Drawings
FIG. 1 is a cross-sectional view of a thermoelectric generation module according to one embodiment of the present application;
fig. 2 is a schematic structural diagram of an integrated thermoelectric generation device according to an embodiment of the present application.
List of parts and reference numerals: 11. heat collecting fins; 12. a heat collecting substrate; 2. a cold end structure; 3. a thermoelectric device; 4. a flexible thermally conductive layer; 5. a fastener; 6. a package structure; 7. and assembling the frame.
Detailed Description
The present application is described in detail below with reference to examples, but the present application is not limited to these examples.
The analytical method in the examples of the present application is as follows:
the open-circuit voltage and the output power of the power generation module are tested by using an electronic load instrument, and the temperature distribution of each part of the thermoelectric power generation device under different working conditions is tested by using a K-type thermocouple. And calculating a heat exchange coefficient and conversion efficiency by combining the heat exchange and power generation parameters.
Example 1
Referring to fig. 1, the power generation module has the following structural parameters,
1) Heat collection structure: the heat collecting fins 11 are 1mm in thickness, 3mm in interval and 10mm in height, the heat collecting substrate 12 is 10mm in thickness, 90mm in width and 100mm in length, the fins are made of aluminum, and the surfaces of the fins are polished and oxidized;
2) Cold junction structure 2: an aluminum cold water plate with the thickness of 10mm, the length of 500mm and the width of 120mm adopts a single-channel mode;
3) Thermoelectric device 3: bismuth telluride-based thermoelectric devices, 25mm x 3.5mm in size, employing a total of 40 thermoelectric devices 3;
4) Flexible heat conductive layer 4: using gold silicone grease as a heat conduction layer, and smearing the gold silicone grease on cold and hot ends of the device;
5) Fastener 5: fixing and pre-tightening by adopting a stainless steel stud and a nut, and applying 30MPa pressure;
6) Packaging structure 6: and a stainless steel sheet is adopted to encapsulate the cold end and the device, so as to isolate the hot gas.
The working conditions are as follows: placing in hot air with 90 deg.C and flow rate of 4m/s, cooling water with 20 deg.C and flow rate of 1m 3 /s。
Under this condition, the temperature distribution of each part of the power generation module is shown in the following table.
Table 1 temperature distribution of power generation module
| Class of | Air-conditioner | Fin type fin | Substrate temperature | Cold water temperature | Device temperature difference |
| Temperature/. Degree.C | 90 | 60 | 55 | 20 | 35 |
Table 2 power generation module power generation and heat exchange performance
Under the working condition and the device condition, the temperature difference of 62 ℃ is established at the two ends of the thermoelectric device in the temperature difference power generation module, the output power is 10W, and the conversion efficiency is 2%.
Example 2
The structural parameters of the power generation module are as follows,
1) Heat collection structure: the heat collecting fins 11 are 1mm in thickness, 3mm in interval and 60mm in height, the heat collecting substrate 12 is 8mm in thickness, 90mm in width and 100mm in length, the fins are made of aluminum, and the surfaces of the fins are polished and oxidized;
2) Cold junction structure 2: an aluminum cold water plate with the thickness of 12mm, the length of 500mm and the width of 120mm adopts a single-channel mode;
3) Thermoelectric device 3: bismuth telluride-based thermoelectric devices, 25mm x 3.5mm in size, employing a total of 40 thermoelectric devices;
4) Flexible heat conductive layer 4: using gold silicone grease as a heat conduction layer, and smearing the gold silicone grease on cold and hot ends of the device;
5) Fastener 5: fixing and pre-tightening by adopting a stainless steel stud and a nut, and applying pressure of 60 MPa;
6) Packaging structure 6: and a stainless steel sheet is adopted to encapsulate the cold end and the device, so as to isolate the hot gas.
The working conditions are as follows: placing in hot air with temperature of 150deg.C and flow rate of 5m/s, cooling water temperature of 20deg.C and flow rate of 1m 3 /s。
Under this condition, the temperature distribution, the power generation performance and the heat exchange performance of each part of the power generation module are shown in the following table.
TABLE 3 Power Module temperature distribution
| Class of | Air-conditioner | Fin type fin | Substrate temperature | Cold water temperature | Device temperature difference |
| Temperature/. Degree.C | 150 | 120 | 117 | 20 | 97 |
Table 4 power generation module power generation and heat exchange performance
Under the working condition and the device condition, the temperature difference of 97 ℃ is established at the two ends of the thermoelectric device in the temperature difference power generation module, the output power is 30W, and the conversion efficiency is 2.3%.
Example 3
The structural parameters of the power generation module are as follows,
1) Heat collection structure: the heat collecting fins 11 are 1mm in thickness, 3mm in interval and 50mm in height, the heat collecting substrate 12 is 8mm in thickness, 90mm in width and 100mm in length, the fins are made of aluminum, and the surfaces of the fins are polished and oxidized;
2) Cold junction structure 2: an aluminum cold water plate with the thickness of 12mm, the length of 500mm and the width of 120mm adopts a single-channel mode;
3) Thermoelectric device 3: bismuth telluride-based thermoelectric devices, 25mm x 3.5mm in size, employing a total of 40 thermoelectric devices;
4) Flexible heat conductive layer 4: using gold silicone grease as a heat conduction layer, and smearing the gold silicone grease on cold and hot ends of the device;
5) Fastener 5: fixing and pre-tightening by adopting a stainless steel stud and a nut, and applying 80MPa pressure;
6) Packaging structure 6: and a stainless steel sheet is adopted to encapsulate the cold end and the device, so as to isolate the hot gas.
The power generation device is integrated by adopting 4 modules to match and assemble the frame 7, see fig. 2.
The working conditions are as follows: placing in hot air with 140 deg.C and flow rate of 4.5m/s, cooling water temperature of 15 deg.C and flow rate of 1m 3 /s。
Under this condition, the overall performance of the power generation device is shown in the following table.
Table 5 temperature profile of power generation module
| Class of | Air-conditioner | Fin type fin | Substrate temperature | Cold water temperature | Device temperature difference |
| Temperature/. Degree.C | 140 | 112 | 110 | 15 | 95 |
Table 6 Power generating Module Power Generation and Heat exchange Performance
Under the working condition and the device condition, the temperature difference of 95 ℃ is established at the two ends of a thermoelectric device in the temperature difference power generation device, the output power is 150W, the conversion efficiency is 1.9%, and single-module data is slightly reduced due to the loss of the integrated system.
According to the embodiment, in order to obtain higher power generation performance, aluminum or copper fins with the height of more than 40mm are required, hundred-watt output power can be obtained by adopting the device, power consumption of equipment such as illumination can be provided for nearby operation, and heat loss caused by discharging high-temperature waste heat into the air is avoided. If the scale of the device is further enlarged, more heat can be recovered and converted into high-grade electric energy.
The foregoing description is only a few examples of the present application and is not intended to limit the present application in any way, and although the present application is disclosed in the preferred examples, it is not intended to limit the present application, and any person skilled in the art may make some changes or modifications to the disclosed technology without departing from the scope of the technical solution of the present application, and the technical solution is equivalent to the equivalent embodiments.
Claims (10)
1. The utility model provides a thermoelectric generation module towards hot environment of gas, its characterized in that is applied to in the hot environment of gas, includes:
a cold end structure having a flow passage for cold water circulation;
the heat collection structure comprises a heat collection substrate and a plurality of heat collection fins which are arranged on the heat collection substrate in parallel; and
And the thermoelectric device is positioned between the cold junction structure and the heat collecting substrate and generates electricity through the temperature difference of the cold junction structure and the heat collecting substrate.
2. The thermoelectric power generation module of claim 1, further comprising a flexible thermally conductive layer disposed between the heat collection substrate and the contact surface of the cold junction structure and/or between the thermoelectric device and the contact surface of the cold junction structure;
preferably, the flexible thermally conductive layer comprises one or more of graphite paper, thermally conductive silicone grease, copper foam, and silicone grease pad.
3. The thermoelectric generation module of claim 1 further comprising a package structure surrounding the cold side structure and the thermoelectric device outer surface.
4. The thermoelectric generation module according to claim 1, wherein two of the heat collecting structures are symmetrically disposed on two opposite outer sides of one of the cold end structures.
5. The thermoelectric generation module of claim 4 further comprising a fastener to fasten the heat collecting bases of two of the heat collecting structures;
preferably, the fastener comprises a stud and a nut.
6. The thermoelectric generation module according to claim 1, wherein the heat collection structure material comprises aluminum, copper or stainless steel;
preferably, the height of the heat collecting fins is 10mm-100mm;
preferably, the distance between the heat collecting fins is 1mm-5mm;
preferably, the thickness of the heat collecting substrate is 3mm-20mm.
7. The thermoelectric generation module of claim 1 wherein the cold-end structure comprises a cold-water plate;
preferably, the height of the cold water plate is 5-20mm;
preferably, the flow channel is single-pass, U-shaped or S-shaped;
preferably, the cold end structure material comprises aluminum, copper or stainless steel.
8. The thermoelectric generation module of claim 1 wherein the thermoelectric device particles comprise one or more of bismuth telluride based, lead telluride based, germanium telluride based, and skutterudite materials.
9. A thermoelectric generation device facing a thermal environment, characterized in that said device is integrated by at least two thermoelectric generation modules according to claim 4.
10. The thermoelectric generation device of claim 9 further comprising an assembly frame for positioning the thermoelectric generation module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202211558765.8A CN116015104A (en) | 2022-12-06 | 2022-12-06 | Thermoelectric power generation module and device oriented to gas-heat environment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211558765.8A CN116015104A (en) | 2022-12-06 | 2022-12-06 | Thermoelectric power generation module and device oriented to gas-heat environment |
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| CN116015104A true CN116015104A (en) | 2023-04-25 |
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