CN109945700B - Compact heat exchange structure and thermal power generation device - Google Patents
Compact heat exchange structure and thermal power generation device Download PDFInfo
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- CN109945700B CN109945700B CN201910231531.4A CN201910231531A CN109945700B CN 109945700 B CN109945700 B CN 109945700B CN 201910231531 A CN201910231531 A CN 201910231531A CN 109945700 B CN109945700 B CN 109945700B
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- 238000010248 power generation Methods 0.000 title claims abstract description 25
- 239000007788 liquid Substances 0.000 claims abstract description 102
- 239000004519 grease Substances 0.000 claims description 3
- 229920001296 polysiloxane Polymers 0.000 claims description 3
- 230000003247 decreasing effect Effects 0.000 abstract description 4
- 230000010354 integration Effects 0.000 abstract description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000005678 Seebeck effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention discloses a compact heat exchange structure and a thermal power generation device, wherein the compact heat exchange structure comprises a plurality of cold end heat sinks and hot end heat sinks which are alternately arranged, a hot liquid inlet header, a hot liquid outlet header, a cold liquid inlet header and a cold liquid outlet header; the warm side heat sink is connected in parallel between the hot liquid inlet header and the hot liquid outlet header, and the cold side heat sink is connected in parallel between the cold liquid inlet header and the cold liquid outlet header. The invention not only solves the problem of integration of the heat exchange unit, but also can adjust the heat exchange quantity by increasing or decreasing the quantity of the cold end heat sink and the hot end heat sink, thereby adjusting the rated power generation; the heat exchange structure can easily realize interconnection of a plurality of heat sinks, and a higher-power photovoltaic power generation system is formed.
Description
Technical Field
The invention relates to the technical field of thermal-voltage power generation, in particular to a compact heat exchange structure and a thermal-voltage power generation device.
Background
The earth geothermal energy has huge storage capacity which is 1.7 hundred million times of coal resources, and waste heat in high-temperature heat sources such as power plant boilers, automobile exhaust and the like is directly discharged into the atmosphere, so that energy waste is caused. The heat energy can be developed and recovered through the thermal-voltage power generation. The basic principle of the thermovoltaic generation is the seebeck effect, i.e. the difference in temperature of two different electrical conductors or semiconductors can cause a voltage difference between the two substances. For a specific cold and heat source and thermoelectric material, the temperature difference is mainly determined by the heat exchange mode and structure.
The existing heat exchanger for the thermal-voltaic power generation is loose in structure, inconvenient to integrate, low in power generation power and not suitable for large-scale power generation.
Accordingly, the prior art is still in need of improvement and development.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, the present invention aims to provide a compact heat exchange structure and a thermal power generation device, and aims to solve the problem that the existing heat exchanger structure for thermal power generation is inconvenient to integrate and cannot meet the requirement of large-scale power generation.
The technical scheme of the invention is as follows:
a compact heat exchange structure comprises a plurality of cold end heat sinks and hot end heat sinks which are alternately arranged, a hot liquid inlet header, a hot liquid outlet header, a cold liquid inlet header and a cold liquid outlet header;
the warm side heat sink is connected in parallel between the hot liquid inlet header and the hot liquid outlet header, and the cold side heat sink is connected in parallel between the cold liquid inlet header and the cold liquid outlet header.
The compact heat exchange structure is characterized in that the hot liquid inlet header and the hot liquid outlet header are respectively provided with a plurality of first annular through grooves, and the first annular through grooves are communicated with the hot end heat sink;
the cold liquid inlet header and the cold liquid outlet header are respectively provided with a plurality of second annular through grooves which are communicated with the cold end heat sink.
The compact heat exchange structure comprises a first annular through groove and/or a second annular through groove, wherein the central angle of the first annular through groove and/or the central angle of the second annular through groove are/is 180 degrees.
The compact heat exchange structure wherein the cold side heat sink and the hot side heat sink are offset at four corners, the hot liquid inlet header and the hot liquid outlet header are located at two corners of a first diagonal, respectively, and the cold liquid inlet header and the cold liquid outlet header are located at two corners of a second diagonal, respectively.
The compact heat exchange structure is characterized in that a plurality of ribs for shunting liquid are arranged in the cold end heat sink and the hot end heat sink, and shunt grooves are formed between adjacent ribs.
The compact heat exchange structure comprises a converging channel with a tapering shape, wherein the converging channel is formed by the connecting line of the same side end points of the ribs and the edges of the cold end heat sink/the hot end heat sink, and the liquid inflow port/the liquid outflow port are positioned at the wide end of the converging channel with tapering shape.
The compact heat exchange structure further comprises a pair of clamping plates for fixing the cold end heat sink and the hot end heat sink, and the clamping plates are locked through a bolt structure or a buckling structure.
The compact heat exchange structure wherein the hot liquid inlet header is disposed on the same side as the cold liquid outlet header; the hot liquid outlet header is disposed on the same side as the cold liquid inlet header such that the flow of hot liquid is opposite the flow of cold liquid.
A thermal-voltage generating device comprises the compact heat exchange structure and a thermoelectric module arranged between the cold end heat sink and the hot end heat sink, wherein the thermoelectric module generates power according to the temperature difference of the cold end heat sink and the hot end heat sink.
The upper side and the lower side of the thermoelectric module are coated with heat conduction silicone grease.
The beneficial effects are that: the invention provides the compact heat exchange structure, which not only solves the problem of integration of a heat exchange unit, but also can adjust the heat exchange quantity by increasing or decreasing the quantity of the cold end heat sink and the hot end heat sink so as to adjust the rated power generation by respectively connecting the cold end heat sink and the hot end heat sink in parallel between the cold liquid header and the hot liquid header; the heat exchange structure can easily realize interconnection of a plurality of heat sinks, and a higher-power photovoltaic power generation system is formed.
Drawings
FIG. 1 is a diagram of a compact heat exchange structure according to a preferred embodiment of the present invention.
Fig. 2 is a block diagram of a preferred embodiment of the invention in which a liquid header is connected in parallel with a heat sink.
Fig. 3 is a schematic structural view of the annular through groove.
Fig. 4 is a schematic diagram of the structure and shunting of the interior of a heat sink.
Detailed Description
The invention provides a compact heat exchange structure and a thermal power generation device, which are used for making the purposes, technical schemes and effects of the invention clearer and more definite, and are further described in detail below. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
It should be noted that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any particular order of magnitude in the indicated technical features, nor are the terms "upper," "lower," etc. used herein with reference to the drawings for convenience of description.
The present invention provides a preferred embodiment of a compact heat exchange structure, as shown in fig. 1, comprising a plurality of cold side heat sinks 1 and hot side heat sinks 2 alternately arranged, a hot liquid inlet header 3, a hot liquid outlet header 4, a cold liquid inlet header 5 and a cold liquid outlet header 6; the warm side heat sink 2 is connected in parallel between the hot liquid inlet header 3 and the hot liquid outlet header 4, and the cold side heat sink 1 is connected in parallel between the cold liquid inlet header 5 and the cold liquid outlet header 6. According to the invention, the cold end heat sink and the hot end heat sink are respectively connected in parallel between the cold liquid headers and between the hot liquid headers, so that the integration problem of the heat exchange unit is solved, and the heat exchange quantity can be adjusted by increasing or decreasing the quantity of the cold end heat sink and the hot end heat sink, thereby adjusting the rated power generation; the heat exchange structure can easily realize interconnection of a plurality of heat sinks, and a higher-power photovoltaic power generation system is formed.
The invention provides a preferred embodiment of parallel connection of a liquid header and a heat sink, as shown in fig. 2 and 3, the hot liquid inlet header 3 and the hot liquid outlet header 4 are respectively provided with a plurality of first annular through grooves 34, and the first annular through grooves 34 are communicated with the hot end heat sink 2; the cold liquid inlet header 5 and the cold liquid outlet header 6 are respectively provided with a plurality of second annular through grooves, and the second annular through grooves are communicated with the cold end heat sink, and the specific structure and the connection mode can refer to fig. 3. The parallel scheme does not need to use additional parts, and has simple and compact structure. Preferably, the central angle of the first annular through groove and/or the second annular through groove is 180 degrees, that is, a semicircular annular groove is formed in the outer wall of the liquid header along the circumference, and the flow distribution process in the heat sink can be adjusted by adjusting the opening size and the rotating opening position of the annular through groove, so that uniform flow distribution in the heat sink can be realized, and the uniformity of the overall heat exchange of the heat sink can be improved.
In parallel, the cold side heat sink 1 and the hot side heat sink 2 may be staggered at four corners, as shown in fig. 1, the hot liquid inlet header 3 and the hot liquid outlet header 4 are located at two corners of a first diagonal line, and the cold liquid inlet header 5 and the cold liquid outlet header 6 are located at two corners of a second diagonal line, respectively. The inlet and outlet positions of the heat exchange working medium of the cold end heat sink and the hot end heat exchange working medium of the hot end heat sink are staggered, so that the arrangement is convenient, and a compact plate type heat exchange structure is formed.
Further, ribs L may be disposed in the cold-end heat sink and the hot-end heat sink, as shown in fig. 4, and a diversion channel is formed between adjacent ribs L, so as to divert liquid. Preferably, the connection line of the same side end point of the rib L and the side of the cold end heat sink/the hot end heat sink form a tapered converging channel, i.e. a triangle split-flow structure in the figure, and the liquid inflow port/outflow port is located at the wide end of the tapered converging channel. The parallel structure has the advantages that water flow enters the heat exchange channels from the cylindrical pipelines and turns at 90 degrees, particularly enters the narrow ends of the tapered converging channels, pressure is increased due to stagnation, so that the heat exchange channels can distribute similar flow by adopting the design with smaller and smaller sections, and heat exchange uniformity is improved.
Further preferably, said hot liquid inlet header 3 is provided on the same side as said cold liquid outlet header 6; the hot liquid outlet header 4 is arranged on the same side as the cold liquid inlet header 5 so that the flow of hot liquid is opposite to the flow of cold liquid. The cold and hot end heat sinks are arranged reversely, so that the inlet pipe of the hot end heat sink and the outlet pipe of the hot end heat sink can be staggered with the cold end heat sink, the inlet pipe of the cold end heat sink and the outlet pipe of the cold end heat sink can be staggered with the hot end heat sink, and energy loss caused by heat leakage is avoided. The flow directions inside the cold and hot end heat sinks are opposite, so that countercurrent heat exchange between the cold and hot end heat sinks is ensured, the heat exchange efficiency is high, and the heat exchange is uniform.
The invention can also respectively arrange a clamping plate on the upper surface and the lower surface of the compact heat exchange structure, and lock the whole structure through a bolt structure or a buckling structure.
The invention also provides a thermal-voltage generating device, which comprises the compact heat exchange structure and a thermoelectric module (not shown in the drawing) arranged between the cold-end heat sink and the hot-end heat sink, wherein the thermoelectric module generates power according to the temperature difference between the cold-end heat sink and the hot-end heat sink, and concretely, thermoelectric materials can be arranged between the hot-end heat sink and the cold-end heat sink, and current is obtained through the thermoelectric materials. Preferably, the upper and lower sides of the thermoelectric module are coated with heat conductive silicone grease to prevent air gaps so as to reduce contact thermal resistance between the heat sink and the thermoelectric module. The thermoelectric generation device has the characteristics of small liquid resistance and uniform internal flow distribution and heat exchange, and can furthest improve the thermoelectric conversion efficiency.
More specific embodiments of the photovoltaic power generation device are as follows:
the whole heat sink of the hot end is a parallelogram shell with the length of 1350mm, the height of 600mm and the thickness of 35mm, and the wall thickness of 10mm. The converging channels (inflow channel and outflow channel) are right-angled triangles, and the right-angle sides of the converging channels are 250mm and 600mm respectively. The ribs L divide the interior of the heat sink into 8 rows of parallel shunt grooves 1100mm long and 75mm wide. The diameter of the connecting hole is 50mm. The structural dimensions of the cold end heat sink and the hot end heat sink are consistent.
The hot liquid inlet header 3, the hot liquid outlet header 4, the cold liquid inlet header 5 and the cold liquid outlet header 6 are the same in size, with an inner diameter of 40mm, an outer diameter of 50mm and a length of 800m. The lower seal of the hot liquid inlet header 3 and the cold liquid inlet header 5, and the upper seal of the hot liquid outlet header 4 and the cold liquid outlet header 6. Annular through grooves with the height of 15mm and the angle of 180 degrees are respectively formed in four positions which are 10mm, 90mm, 170mm and 250mm away from the seal.
Each thermoelectric conversion layer has 5×9 thermoelectric modules, each of which has dimensions of 100mm×100mm×5mm, and the circuits are connected in series. The fastening splint has the dimensions of 1000mm x 800mm x 20mm, and is fixed by fastening bolts (800 mm long) with 6 holes with diameter of 20mm respectively arranged on two sides.
In summary, the invention provides a compact heat exchange structure and a thermal power generation device, wherein the cold end heat sink and the hot end heat sink are respectively connected in parallel between the cold liquid header and the hot liquid header, so that the problem of integration of a heat exchange unit is solved, the heat exchange amount can be adjusted by increasing or decreasing the number of the cold end heat sink and the hot end heat sink, and the rated power generation is adjusted; the heat exchange structure can easily realize interconnection of a plurality of heat sinks, and a higher-power photovoltaic power generation system is formed. The invention further improves the concrete structure of the heat exchange unit, realizes direct parallel connection with the heat sink by arranging the annular through grooves on the 4 liquid headers, does not need additional connecting pieces, has simple and compact structure, and ensures that cold and hot end working substances can fully contact with heat exchange. Based on the compact heat exchange structure, the invention also provides a corresponding thermal-voltage power generation device, which has the characteristics of small liquid resistance and uniform internal flow distribution and heat exchange, can furthest improve the thermoelectric conversion efficiency, can adjust the heat exchange amount according to the requirement, and further adjusts the rated power.
It is to be understood that the invention is not limited in its application to the examples described above, but is capable of modification and variation in light of the above teachings by those skilled in the art, and that all such modifications and variations are intended to be included within the scope of the appended claims.
Claims (5)
1. A compact heat exchange structure is characterized by comprising a plurality of cold end heat sinks and hot end heat sinks which are alternately arranged, a hot liquid inlet header, a hot liquid outlet header, a cold liquid inlet header and a cold liquid outlet header;
the warm end heat sink is connected in parallel between the hot liquid inlet header and the hot liquid outlet header, and the cold end heat sink is connected in parallel between the cold liquid inlet header and the cold liquid outlet header;
the hot liquid inlet header and the hot liquid outlet header are respectively provided with a plurality of first annular through grooves, and the first annular through grooves are communicated with the hot end heat sink; the cold liquid inlet header and the cold liquid outlet header are respectively provided with a plurality of second annular through grooves, and the second annular through grooves are communicated with the cold end heat sink;
the central angle of the first annular through groove and/or the second annular through groove is 180 degrees;
the cold end heat sink and the hot end heat sink are staggered at four corners, the hot liquid inlet header and the hot liquid outlet header are respectively positioned at two corners of a first diagonal, and the cold liquid inlet header and the cold liquid outlet header are respectively positioned at two corners of a second diagonal;
the cold end heat sink and the hot end heat sink are internally provided with a plurality of ribs for shunting liquid, and shunt grooves are formed between adjacent ribs; and the connecting line of the same side end points of the ribs and the side of the cold end heat sink/the hot end heat sink form a tapered converging channel, and the liquid inflow port/the liquid outflow port are positioned at the wide end of the tapered converging channel.
2. The compact heat exchange structure of claim 1, further comprising a pair of clamping plates for securing the cold side heat sink and the hot side heat sink, the clamping plates being locked by a bolt structure or a snap-fit structure.
3. The compact heat exchange structure according to any one of claims 1-2, wherein said hot liquid inlet header is provided on the same side as said cold liquid outlet header; the hot liquid outlet header is disposed on the same side as the cold liquid inlet header such that the flow of hot liquid is opposite the flow of cold liquid.
4. A thermal power generation device comprising the compact heat exchange structure of any one of claims 1-3, and a thermoelectric module disposed between the cold side heat sink and the hot side heat sink, the thermoelectric module generating power according to a temperature difference between the cold side heat sink and the hot side heat sink.
5. The device of claim 4, wherein the thermoelectric module is coated with thermally conductive silicone grease on both sides.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910231531.4A CN109945700B (en) | 2019-03-26 | 2019-03-26 | Compact heat exchange structure and thermal power generation device |
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| CN201910231531.4A CN109945700B (en) | 2019-03-26 | 2019-03-26 | Compact heat exchange structure and thermal power generation device |
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| CN109945700A CN109945700A (en) | 2019-06-28 |
| CN109945700B true CN109945700B (en) | 2024-03-29 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111521046B (en) * | 2019-08-23 | 2022-03-18 | 四平市巨元瀚洋板式换热器有限公司 | Waste heat recovery power generation type heat exchanger |
| CN111663997B (en) * | 2020-06-22 | 2024-08-23 | 北京芷泉能源科技有限公司 | Heat-exchanging thermal-voltage power generation system |
| CN114777533B (en) * | 2022-06-21 | 2022-09-06 | 四川大学 | Heat exchange and heat recovery system |
| CN116582029A (en) * | 2023-07-03 | 2023-08-11 | 深圳大学 | Modularized geothermal power generation system |
| CN116780940A (en) * | 2023-07-03 | 2023-09-19 | 深圳大学 | Geothermal heat photovoltaic power generation module and geothermal heat photovoltaic power generator |
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| CN103649668A (en) * | 2011-06-24 | 2014-03-19 | 三菱电机株式会社 | Plate heater and refrigeration cycle device |
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