CN115045522A - Thermoelectric effect based cooling device and method for large-span steel structure - Google Patents
Thermoelectric effect based cooling device and method for large-span steel structure Download PDFInfo
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- CN115045522A CN115045522A CN202210912119.0A CN202210912119A CN115045522A CN 115045522 A CN115045522 A CN 115045522A CN 202210912119 A CN202210912119 A CN 202210912119A CN 115045522 A CN115045522 A CN 115045522A
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- ring
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 71
- 239000010959 steel Substances 0.000 title claims abstract description 71
- 238000001816 cooling Methods 0.000 title claims abstract description 39
- 230000005676 thermoelectric effect Effects 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 title claims description 11
- 239000002184 metal Substances 0.000 claims abstract description 13
- 229910052751 metal Inorganic materials 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 5
- 239000004065 semiconductor Substances 0.000 claims description 22
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 13
- 239000000919 ceramic Substances 0.000 claims description 9
- 229910052802 copper Inorganic materials 0.000 claims description 9
- 239000010949 copper Substances 0.000 claims description 9
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052737 gold Inorganic materials 0.000 claims description 2
- 239000010931 gold Substances 0.000 claims description 2
- 150000002739 metals Chemical class 0.000 claims description 2
- 229910052709 silver Inorganic materials 0.000 claims description 2
- 239000004332 silver Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 10
- 238000010276 construction Methods 0.000 abstract description 8
- 230000005679 Peltier effect Effects 0.000 abstract description 3
- 210000002784 stomach Anatomy 0.000 abstract description 3
- 230000005540 biological transmission Effects 0.000 abstract description 2
- 230000017525 heat dissipation Effects 0.000 abstract description 2
- 239000004020 conductor Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000011796 hollow space material Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/24—Safety or protective measures preventing damage to building parts or finishing work during construction
- E04G21/28—Safety or protective measures preventing damage to building parts or finishing work during construction against unfavourable weather influence
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/342—Structures covering a large free area, whether open-sided or not, e.g. hangars, halls
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/52—Casings; Connections of working fluid for axial pumps
- F04D29/54—Fluid-guiding means, e.g. diffusers
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Power Engineering (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
The invention discloses a cooling device and a cooling method for a large-span steel structure based on a thermoelectric effect, wherein a steel structure member is used as an empty stomach member, the empty stomach structure of the self bearing capacity of the structure is improved by increasing the self turning radius, namely resisting moment, and the siberg effect and the Peltier effect are combined; through using the metal of the different materials with the steel construction, in the both ends of the interior connection steel construction of the fast web of steel construction: a high temperature end and a low temperature end which form a first loop; a fan fixed in the hollow cavity of the steel structure is connected in series in the first loop at the metal side; the fan is driven by the thermal current in the loop, and the steel structure is cooled by flowing wind. The effect of cooling from the hollow of the steel structure is realized. The novel cooling device is simple in structure, convenient to use, small in size, light in weight, free of load, easy to maintain, energy-saving and environment-friendly, effectively reduces temperature transmission in a steel structure, strengthens the effects of heat dissipation and cooling, relieves deformation of the structure due to temperature stress, and has strong practicability and wide applicability.
Description
Technical Field
The invention relates to a cooling device and a cooling method, in particular to a cooling device and a cooling method of a large-span steel structure based on a thermoelectric effect.
Background
At present, students at home and abroad study the bearing capacity of the section of the steel structure and the stability, slenderness ratio, buckling and fatigue degree of the structural member more, most of the studies are focused on the stress analysis of the steel structure, the study on the influence of temperature on the ultra-large steel structure is less, and the influence of the temperature on the ultra-large structure is not negligible in practice. The design specification of the steel structure in China has strict regulations on the temperature section of the steel structure, the problem of temperature expansion and contraction of the steel structure with the length exceeding the design specification is required to be calculated, and the double columns are arranged at the temperature section to enable the structure to be a plurality of independent sections, so that the influence of temperature is solved.
Therefore, a new method is needed to solve the problem of durability of the long-span steel member in a stressed state in a high temperature difference open air environment.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a cooling device and a cooling method for a large-span steel structure based on a thermoelectric effect.
In order to achieve the above object, the present invention adopts the following technical solutions:
the cooling device and the method for the large-span steel structure based on the thermoelectric effect use metal which is made of different materials from the steel structure, and connect the two ends of the steel structure in the hollow of the steel structure: a high temperature end and a low temperature end forming a first loop; a fan fixed in the hollow cavity of the steel structure is connected in series in the first loop at the metal side;
the fan is driven by thermal current in the loop, and the steel structure is cooled by flowing wind.
The metal material includes copper, silver and gold.
The wind direction of the fan flows from the low temperature end to the high temperature end.
At the high temperature end, the connecting point of the metal and the steel structure is arranged on the hollow top wall; and at the low-temperature end, the connecting point of the metal and the steel structure is arranged on the hollow bottom wall.
The cooling device and the cooling method also comprise a plurality of PN rings which are arranged between the high-temperature end and the low-temperature end of the steel structure and are abutted against the hollow inner wall of the steel structure;
the PN ring comprises a plurality of N-type semiconductors and P-type semiconductors which are sequentially and uniformly distributed at intervals in a ring shape, the outer side ends and the inner side ends of the adjacent N-type semiconductors and P-type semiconductors are respectively connected by copper sheets on the same side in a conduction mode, and the outer side of the ring and the inner side of the ring are respectively provided with an insulating ceramic ring;
wherein, the N-type semiconductor and the P-type semiconductor are disconnected and are an input end and an output end;
the PN rings and the power supply form a second loop in a mode of sequentially connecting the input end and the output end in series or in parallel; according to the current direction, the insulating ceramic ring on the outer side of the ring, which is connected with the hollow inner wall of the steel structure in a low-voltage mode, is a cold end;
the power supply comprises the first loop of claim 1.
Furthermore, the second loop is connected with a circuit breaker in series, and the control device switches on and off the circuit breaker according to the feedback of the temperature sensor; the temperature sensor detects the temperature of the steel structure.
Further, the power supply comprises a storage battery connected with a storage unit;
the electric power storage unit comprises a coil arranged at the edge of a fan blade of the ring fan and magnets arranged at two sides of the fan;
the coil rotates along with the fan shaft to cut the magnetic field and supply power to the storage battery.
Still further, the power storage unit further includes a solar panel.
Furthermore, the PN rings can also form a second loop with a power supply in a parallel connection mode through the input end and the output end;
the PN rings are respectively connected with the circuit breakers in series, and the control device switches on and off the circuit breakers according to the feedback of the temperature sensors matched with the PN rings.
The invention has the advantages that:
the invention relates to a cooling device and a cooling method for a large-span steel structure based on a thermoelectric effect, which utilize a steel structure member as a hollow member, improve the hollow structure of the self bearing capacity of the structure by increasing the self turning radius, namely resisting moment, and combine the thermoelectric effect: the temperature and the voltage are mutually converted, and the effect of reducing the temperature in the hollow of the steel structure is realized.
The present invention utilizes the siberian effect of the thermoelectric effect: in an open circuit formed by two different conductors, if two nodes of the conductors have temperature difference, induced electromotive force is generated in the open circuit, and a fan in the cavity is driven by voltage formed by the induced electromotive force to blast flowing wind so as to form the effect of reducing the temperature. Combining the principle of a generator, combining fan blades of the fan with coils of a cutting magnetic field, accumulating generated current by a storage battery, and supplying power to a PN ring designed according to the Peltier effect; peltier effect: when current flows through the interfaces of the two different conductors, the current absorbs heat from the outside or emits heat to the outside, and then the real-time cooling of the steel structure is realized.
The cooling device and the cooling method based on the thermoelectric effect large-span steel structure have the advantages of simple structure, convenience in use, small size, light weight, no load, easiness in maintenance, energy conservation and environmental friendliness, capability of effectively reducing the temperature transmission in the steel structure, strengthening the effects of heat dissipation and cooling, relieving the deformation of the structure due to temperature stress, and strong practicability and wide applicability.
Drawings
Fig. 1 is a schematic structural view of the hollow structure of the steel structure of the present invention.
Fig. 2 is a schematic structural diagram of a PN ring of the present invention.
The designations in the drawings have the following meanings: 1. the device comprises a steel structure, 2, a PN ring, 3, a fan, 4, a low-temperature end, 5, a high-temperature end, 6, an insulating ceramic ring, 7 and a copper sheet.
Detailed Description
The invention is described in detail below with reference to the figures and the embodiments.
A cooling device and a cooling method for a large-span steel structure based on thermoelectric effect are characterized in that a high-temperature end 5 and a low-temperature end 4 of the steel structure 1 are connected in a hollow of the steel structure 1 through copper wires (metal), the copper wires are connected with a hollow top wall at the high-temperature end 5, and the copper wires are connected with a hollow bottom wall at the low-temperature end 4. A fan 3 is embedded in the hollow space between the high-temperature end 5 and the low-temperature end 4, and the fan 3 is connected in series with the copper wire; namely, a first loop is formed by a steel structure between a high-temperature end 5 and a low-temperature end 4, a copper wire and the fan 3.
The principle is as follows: after the two ends of the steel structure are subjected to different temperatures, electrons inside the steel structure can move from the high-temperature area to the low-temperature area and are accumulated in the low-temperature area, so that potential difference is formed inside the steel structure, and therefore, after two metals (the steel structure and the copper wire) form a loop, if the temperatures of two contact points are different, current (also called thermal current) can appear in the loop, and the current drives the fan 3 to cool the steel structure. The copper wire can be replaced by silver wire, gold wire or other material wire according to the use requirement.
The wind direction of the fan 3 flows from the low temperature end 4 to the high temperature end 5, so that in the cavity, cold air flows towards hot air. Because the hot air is lighter and is easy to fly to a high place, as the steel structure shown in figure 1, the top end is easy to be heated and heated to form a high-temperature end, the hot air can be quickly discharged from the top opening due to the light weight, the energy efficiency waste caused by the collision with the cold air at the bottom is avoided, more heat is delayed in the empty stomach, and the cooling effect is improved; after the hot-air discharge, form the negative pressure in the cavity, combine fan 3's effort for the cold air of bottom upwells, plays the effect of cooling from the inside of steel construction, simultaneously, has reduced the high temperature end of temperature follow steel construction and to the transfer rate of low temperature end 4.
The fan also forms a power storage unit of the power generation assembly and supplies power to the storage battery; setting coils along the edge of fan blades of the fan, and setting magnets on two sides of the fan to form a magnetic field; the coil rotates along with the fan blades of the fan to cut magnetic induction lines of a magnetic field, and the kinetic energy of the rotation of the fan is converted into electric energy to generate electricity for the storage battery.
The storage unit of the storage battery further comprises a solar panel. The storage battery supplies power to the PN rings 2, and the PN rings 2 are connected with the hollow inner wall of the steel structure in an abutting mode between the high-temperature end and the low-temperature end 4 along the length direction.
As shown in fig. 2, the PN ring 2 includes a plurality of N-type semiconductors and P-type semiconductors which are sequentially and uniformly distributed in a ring shape at intervals, the outer side ends and the inner side ends of the adjacent N-type semiconductors and P-type semiconductors are respectively connected by copper sheets 7 on the same side, and the outer side and the inner side of the ring are respectively provided with an insulating ceramic ring 6. Wherein, a group of adjacent N-type semiconductors and P-type semiconductors are disconnected and are used as input ends and output ends. The PN rings 2 and the storage battery form a second loop in a mode of sequentially connecting in series or in parallel through an input end and an output end; according to the current direction, the insulating ceramic ring 6 on the outer side of the ring, which is connected with the hollow inner wall of the steel structure in a low mode, is a cold end, and the insulating ceramic ring 6 on the inner side of the ring is a hot end.
When the series connection is adopted, the second loop is connected with the circuit breaker in series, and the control device switches on and off the circuit breaker according to the feedback of the temperature sensor; the temperature sensor detects the temperature of the high-temperature end of the steel structure.
When the parallel connection is adopted, the branch circuits of the PN rings 2 are respectively connected with the circuit breakers in series and then connected in parallel to form a second loop with the storage battery. And the control device switches on and off the circuit breakers according to the feedback of the temperature sensors matched with the PN rings.
The principle is as follows: the N-type semiconductor has redundant electrons and negative temperature difference potential, and the P-type semiconductor has insufficient electrons and positive temperature difference potential; as electrons pass from the P-type semiconductor through the junction to the N-type, the temperature of the junction decreases; conversely, as electrons flow from the N-type semiconductor to the P-type material, the temperature of the junction increases.
In this embodiment, the cold junction of PN ring passes through insulating ceramic ring 6 and steel construction contact, and the heat absorption is and for the steel construction cooling, and the heat that gives off is blown out by the wind of fan in the fasting of steel construction is arranged in to the hot junction, has strengthened steel structure body's cooling and temperature control effect.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the above embodiments do not limit the present invention in any way, and all technical solutions obtained by using equivalent alternatives or equivalent variations fall within the scope of the present invention.
Claims (9)
1. A cooling device and a cooling method for a large-span steel structure based on thermoelectric effect are characterized in that metals made of different materials from the steel structure are used for connecting the two ends of the steel structure in the hollow of the steel structure: a high temperature end and a low temperature end forming a first loop; a fan fixed in the hollow cavity of the steel structure is connected in series in the first loop at the metal side;
the fan is driven by thermal current in the loop, and the steel structure is cooled by flowing wind.
2. The cooling device and method according to claim 1, wherein the metal comprises copper, silver, or gold.
3. The cooling device and method according to claim 1, wherein the wind direction of the fan flows from the low temperature end to the high temperature end.
4. The cooling device and method according to claim 1, wherein the metal and steel structure connection point is at the top wall of the hollow body at the high temperature end; and at the low-temperature end, the connecting point of the metal and the steel structure is arranged on the hollow bottom wall.
5. The cooling device and the cooling method as claimed in claim 1, further comprising a plurality of PN rings which are arranged between the high temperature end and the low temperature end of the steel structure and are abutted against the hollow inner wall of the steel structure;
the PN ring comprises a plurality of N-type semiconductors and P-type semiconductors which are sequentially and uniformly distributed at intervals in a ring shape, the outer side ends and the inner side ends of the adjacent N-type semiconductors and P-type semiconductors are respectively connected by copper sheets on the same side in a conduction mode, and the outer side of the ring and the inner side of the ring are respectively provided with an insulating ceramic ring;
wherein, the N-type semiconductor and the P-type semiconductor are disconnected and are an input end and an output end;
the PN rings and the power supply form a second loop in a mode of sequentially connecting the input end and the output end in series or in parallel; according to the current direction, the insulating ceramic ring on the outer side of the ring, which is connected with the hollow inner wall of the steel structure in a low-voltage mode, is a cold end;
the power supply comprises the first loop of claim 1.
6. The cooling device and the method according to claim 5, wherein the second loop is connected with a circuit breaker in series, and the control device switches on and off the circuit breaker according to the feedback of the temperature sensor; the temperature sensor detects the temperature of the steel structure.
7. The cooling device and the method according to claim 5, wherein the power supply comprises a storage battery, and is connected with a storage unit;
the electric power storage unit comprises a coil arranged at the edge of a fan blade of the ring fan and magnets arranged at two sides of the fan;
the coil rotates along with the fan shaft to cut the magnetic field and supply power to the storage battery.
8. The cooling device and method according to claim 7, wherein the power storage unit further comprises a solar panel.
9. The cooling device and the method according to claim 6, wherein the plurality of PN loops can also form a second loop with a power supply in a parallel connection mode through the input end and the output end;
the PN rings are respectively connected with the circuit breakers in series, and the control device switches on and off the circuit breakers according to the feedback of the temperature sensors matched with the PN rings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210912119.0A CN115045522B (en) | 2022-07-29 | 2022-07-29 | Cooling device and method of large-span steel structure based on thermoelectric effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210912119.0A CN115045522B (en) | 2022-07-29 | 2022-07-29 | Cooling device and method of large-span steel structure based on thermoelectric effect |
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| Publication Number | Publication Date |
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| CN115045522A true CN115045522A (en) | 2022-09-13 |
| CN115045522B CN115045522B (en) | 2023-12-26 |
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| US20030154725A1 (en) * | 2002-02-15 | 2003-08-21 | Mcgrew Stephen P. | Counter-flow heat pump |
| US20040131470A1 (en) * | 2003-01-06 | 2004-07-08 | Walter Boyd | Cooling fan with reinforced blade |
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2022
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| CN115045522B (en) | 2023-12-26 |
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