CN109510509B - Waste heat power generation device and battery energy storage system - Google Patents
Waste heat power generation device and battery energy storage system Download PDFInfo
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- CN109510509B CN109510509B CN201811244953.7A CN201811244953A CN109510509B CN 109510509 B CN109510509 B CN 109510509B CN 201811244953 A CN201811244953 A CN 201811244953A CN 109510509 B CN109510509 B CN 109510509B
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- 238000010248 power generation Methods 0.000 title claims abstract description 62
- 239000002918 waste heat Substances 0.000 title claims abstract description 60
- 238000004146 energy storage Methods 0.000 title claims abstract description 32
- 239000012781 shape memory material Substances 0.000 claims abstract description 53
- 239000000463 material Substances 0.000 claims abstract description 52
- 230000005540 biological transmission Effects 0.000 claims abstract description 23
- 239000000919 ceramic Substances 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 20
- 239000007789 gas Substances 0.000 claims abstract description 18
- 229910001285 shape-memory alloy Inorganic materials 0.000 claims abstract description 16
- 230000008569 process Effects 0.000 claims abstract description 13
- 238000010438 heat treatment Methods 0.000 claims abstract description 11
- 239000002184 metal Substances 0.000 claims abstract description 11
- 238000001816 cooling Methods 0.000 claims abstract description 10
- 229910052751 metal Inorganic materials 0.000 claims abstract description 9
- 239000002912 waste gas Substances 0.000 claims abstract description 8
- 239000002131 composite material Substances 0.000 claims abstract description 5
- 229920000642 polymer Polymers 0.000 claims abstract description 4
- 238000006243 chemical reaction Methods 0.000 claims description 15
- 230000009467 reduction Effects 0.000 claims description 5
- 238000012546 transfer Methods 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims description 2
- 230000008859 change Effects 0.000 abstract description 5
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- 229910001000 nickel titanium Inorganic materials 0.000 description 7
- 238000003860 storage Methods 0.000 description 7
- HZEWFHLRYVTOIW-UHFFFAOYSA-N [Ti].[Ni] Chemical compound [Ti].[Ni] HZEWFHLRYVTOIW-UHFFFAOYSA-N 0.000 description 6
- 230000008901 benefit Effects 0.000 description 6
- 238000013461 design Methods 0.000 description 4
- 238000004064 recycling Methods 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000007770 graphite material Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
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- 230000007613 environmental effect Effects 0.000 description 2
- 230000003446 memory effect Effects 0.000 description 2
- 229910001092 metal group alloy Inorganic materials 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
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- 238000005265 energy consumption Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- HLXZNVUGXRDIFK-UHFFFAOYSA-N nickel titanium Chemical compound [Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni] HLXZNVUGXRDIFK-UHFFFAOYSA-N 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
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- 230000035484 reaction time Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
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- 239000000126 substance Substances 0.000 description 1
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- 230000007704 transition Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/18—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G5/00—Profiting from waste heat of combustion engines, not otherwise provided for
- F02G5/02—Profiting from waste heat of exhaust gases
- F02G5/04—Profiting from waste heat of exhaust gases in combination with other waste heat from combustion engines
-
- 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
- H02J7/32—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from a charging set comprising a non-electric prime mover rotating at constant speed
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a waste heat power generation device and a battery energy storage system, wherein the device comprises a device body, the device body comprises a heat exchange region and a power generation region, the heat exchange region comprises a gas passing space, a shape memory material penetrates through the heat exchange region and the power generation region, a piezoelectric material is arranged in the power generation region, the shape memory material and the piezoelectric material are both fixed on a transmission connector, the shape memory material deforms in the heating and cooling processes, the piezoelectric material is driven to generate electric energy by the pressure generated by the deformation of the shape memory material through the transmission connector, the shape memory material is a shape memory metal or a shape memory alloy, and the piezoelectric material is one or a combination of a plurality of piezoelectric ceramics, a piezoelectric ferroelectric material, a piezoelectric polymer and a piezoelectric composite material. The device directly outputs displacement and force through thermoelastic phase change of the shape memory material without a transmission mechanism for power generation, has simple structure, is economical, convenient and practical, can be expanded in a distributed manner, can effectively utilize waste heat in waste gas for power generation, and is particularly suitable for the utilization of non-industrial low-temperature waste heat.
Description
Technical Field
The invention relates to the technical field of energy recycling, in particular to a waste heat power generation device and a battery energy storage system for recycling waste heat to generate power.
Background
With the promotion of the national policy of energy conservation and emission reduction, the attention degree of energy-saving equipment and technology utilization by high-energy-consumption industries and enterprises is deepened more and more. The government should actively implement various preferential policies of energy conservation and environmental protection and increase the financial support for low-temperature waste heat utilization projects of enterprises. Although the existing energy storage schemes play a great role in various high-quality waste heat utilization, the energy storage scheme of high-temperature waste heat is not applicable to low temperature and cannot generate economic value.
At present, low-temperature waste heat generated by large-scale factories and enterprises can be recycled by some low-temperature generator sets. These units may improve overall power generation efficiency. However, the total energy utilization rate in China is only about 33%. However, two thirds of the energy source is wasted in industrial production. The prior art can recover low-temperature waste heat, but has the problems of high cost, difficult grid connection and the like. The practical application rate is low. Particularly, the utilization rate of low-temperature waste heat in a non-large industrial environment is low, and large equipment in an industrial area is not suitable no matter the cost is high, noise is generated to the environment, and the like.
At present, the utilization method of low-temperature waste heat, such as the team led by Lane Martin of the subsidiary professor of the materials science and engineering of Berkeley university of California, adopts different methods to develop a nano-material film which can collect waste heat from the thermoelectric conversion process and convert the waste heat into electric power. The existing record is refreshed with both energy density and power density in the laboratory. However, in the practical application process, the temperature is limited, or the ideal effect is generated within a certain range.
Therefore, the generation and waste of low-temperature waste heat are serious in an office area where electronic equipment is relatively concentrated relative to an industrial area or a non-industrial area such as a large data center, but the low-temperature waste heat is a place which is ignored by many people. For these users and businesses, this waste of energy directly results in high operating costs. The combination of distributed clean energy-energy storage-block chain technology is the direction of future energy development. At present, new energy can only be stored by a battery, the existing method is that the memory material is deformed to drive the hydraulic equipment to store energy and then generate electricity, and efficiency loss is generated between energy conversion. And the cost of battery energy storage is higher than that of traditional pumped storage. If the energy storage device is not economically practical, the push for new energy will be a huge impediment. Therefore, it is desired to develop an economical and practical waste heat recovery and utilization technique that can effectively utilize low-temperature waste heat.
Disclosure of the invention
The invention aims to provide a waste heat power generation device and a battery energy storage system which are simple in structure, economical, convenient and practical and can be effectively utilized.
One of the purposes of the invention is to provide a waste heat power generation device, which comprises a device body, wherein the device body comprises a heat exchange region and a power generation region, the heat exchange region comprises a gas passing space, a shape memory material penetrates through the heat exchange region and the power generation region, a piezoelectric material is arranged in the power generation region, the shape memory material and the piezoelectric material are both fixed on a transmission connector, the shape memory material generates deformation in the heating and cooling processes, the piezoelectric material is driven by the pressure generated by the deformation of the shape memory material through the transmission connector to generate electric energy, the shape memory material is a shape memory metal or a shape memory alloy, and the piezoelectric material is made of one or a combination of a plurality of piezoelectric ceramics, a piezoelectric ferroelectric material, a piezoelectric polymer and a piezoelectric composite material.
Furthermore, the transmission connector is provided with a first channel for placing the shape memory material and a second channel for placing the piezoelectric material, and the first channel is communicated with the second channel and forms an included angle of 90 degrees.
Furthermore, according to the waste heat power generation device, the piezoelectric materials are arranged in parallel at intervals and are used for multi-point linkage power generation.
Further, according to the waste heat power generation device, the heat exchange area controls hot gas to flow through a waste gas heat source, the temperature is reduced through room-temperature air, the shape memory material is deformed in the heating and cooling processes through controlling the gas to pass through and bypass the heat exchange area, and the piezoelectric ceramic is driven to generate current through the transmission connector.
Further, in the exhaust heat power generation device of the present invention, the piezoelectric material is a piezoelectric ceramic, and the shape memory material is a shape memory alloy. Preferably a nickel titanium shape memory alloy.
Further, in the waste heat power generation device of the present invention, a heat insulation layer is disposed between the power generation regions in the heat exchange region, and the heat insulation layer is made of a heat insulation graphite material.
Further, the exhaust heat power generation device of the present invention is provided with a plurality of groups distributed along the exhaust emission direction.
Another object of the present invention is to provide a battery energy storage system, comprising a waste heat collecting device for collecting waste gas containing low-temperature waste heat; the waste heat power generation device is used for converting heat energy in waste heat into deformation of the shape memory material through the memory material and converting the deformation of the memory material into electric energy through the piezoelectric material; the electric energy conversion device is used for recovering and reducing the electric energy converted by the piezoelectric power generation device; and the energy storage device is used for storing the electric energy recovered and subjected to reduction conversion by the electric energy conversion device, wherein the waste heat power generation device is any one of the waste heat power generation devices.
Further, in the battery energy storage system, the energy storage device is a battery container.
Further, according to the battery energy storage system, the batteries of the battery container are recovered storage batteries.
Has the advantages that: the waste heat power generation device has the advantages of simple structure, economy, convenience, practicability, distributed expansion, capability of effectively utilizing waste heat in waste gas to generate power, and particular suitability for non-industrial low-temperature waste heat utilization. By utilizing the two-way memory effect of the shape memory material, after plastic deformation at the temperature lower than the phase change temperature, reheating can restore to the original condition before deformation to do work on the piezoelectric material so as to convert heat energy into electric energy. Because the reaction speed of the piezoelectric material is high, and the reaction time of the shape memory material and the thermal cycle period are long, a great deal of work is spent on reducing the thermal cycle working period of the nickel-titanium memory metal, so that the energy conversion efficiency can be greatly improved. And the deformation ratio required for the buckling deformation is not particularly large, so that the deformation of the memory metal is in a linear range. The control of the electric energy conversion of the heat energy is more accurate. The current design solution is to utilize the exhaust gas.
The battery energy storage system is integrated with the battery container, so that the process of generating power after storing energy in the prior art is reduced; the simplification of the process directly increases the conversion efficiency of the entire system. And the storage battery which is treated and recycled by the technology is made into a storage battery container, so that the cost of energy storage equipment is greatly reduced. The invention combines the heat energy recycling and the energy storage battery recycling, and greatly improves the efficiency and economic value in the aspect of low-temperature waste heat utilization. Has the characteristics of low cost and strong stability, and has no pollution to the environment. Since the manufacturing cost of the device is cheap compared to other large devices in their entirety, the degree of integration of the modules is entirely dependent on the scale of the waste heat of the user, since it is modular. The deformation range of the memory metal designed by the patent is strictly controlled in the current deformation range, so that the service life of the main part lasts for more than 20 years. And because the moving part is completely pushed by heat, no environmental noise is generated. And the local energy storage system is formed with the storage battery container, and the problem of network access is not required to be solved.
Drawings
Fig. 1 is a schematic structural view of a waste heat power generation device of the present invention.
Fig. 2, thermal strain curve of shape memory material.
Reference numerals: 1. a shell (of the device body), 2, a heat exchange area, 3, a power generation area, 4, a shape memory material, 5, a transmission connector, 6, a piezoelectric material, 7 and a heat insulation graphite material.
Detailed Description
The cogeneration unit is the most important part of the overall battery energy storage system. The waste heat power generation device of the present invention will be described in detail with reference to the drawings attached to the specification.
As shown in fig. 1 and 2, a cogeneration apparatus of the invention comprises an apparatus body including a heat transfer zone 2 and a power generation zone 3, the heat exchange area 2 comprises a gas passing space, the shape memory material 4 is arranged in the heat exchange area 2 and the power generation area 3 in a penetrating way, the piezoelectric material 6 is arranged in the power generation area 3, the shape memory material 4 and the piezoelectric material are both fixed on the transmission connector 5, the shape memory material 4 is deformed in the heating and cooling processes, the piezoelectric material is driven by the pressure generated by the deformation of the shape memory material 4 through the transmission connector 5 to generate electric energy, the shape memory material 4 is shape memory metal or shape memory alloy, and the piezoelectric material 6 is made of one or a combination of piezoelectric ceramics, piezoelectric ferroelectric materials, piezoelectric polymers and piezoelectric composite materials.
Further, the transmission connector 5 is provided with a first channel for placing the shape memory material 4 and a second channel for placing the piezoelectric material 6, and the first channel is communicated with the second channel and forms an included angle of 90 degrees.
Furthermore, according to the waste heat power generation device, the piezoelectric materials are arranged in parallel at intervals and are used for multi-point linkage power generation.
Further, according to the waste heat power generation device, the heat exchange area 2 controls hot gas to flow through a waste gas heat source, the temperature is reduced through room-temperature air, the shape memory material 4 is deformed in the heating and cooling processes by controlling the gas to pass through and bypass the heat exchange area 2, and the piezoelectric ceramic is driven to generate current through the transmission connector 5.
Further, in the exhaust heat power generation device of the present invention, the piezoelectric material is a piezoelectric ceramic, and the shape memory material 4 is a shape memory alloy. Preferably a nickel titanium shape memory alloy.
Further, in the waste heat power generation device of the present invention, a heat insulation layer is provided between the heat exchange zone 2 and the power generation zone 3, and the heat insulation layer is made of a heat insulation graphite material 7.
Further, the exhaust heat power generation device of the present invention is provided with a plurality of groups distributed along the exhaust emission direction.
Another object of the present invention is to provide a battery energy storage system, comprising a waste heat collecting device for collecting waste gas containing low-temperature waste heat; the waste heat power generation device is used for converting heat energy in waste heat into deformation of the shape memory material 4 through the memory material and converting the deformation of the memory material into electric energy by applying work through the piezoelectric material 6; the electric energy conversion device is used for recovering and reducing the electric energy converted by the piezoelectric power generation device; and the energy storage device is used for storing the electric energy recovered and subjected to reduction conversion by the electric energy conversion device, wherein the waste heat power generation device is any one of the waste heat power generation devices.
Further, in the battery energy storage system, the energy storage device is a battery container.
Further, according to the battery energy storage system, the batteries of the battery container are recovered storage batteries.
As shown in fig. 2, the shape memory material 4 has a two-way memory effect (shape memory metal or shape memory alloy, preferably nitinol) compared to other materials, such as metals and superelastic materials, and when heated, the shape memory material 4 recovers a high temperature phase shape and when cooled, recovers a low temperature phase shape. Compared with the original elements such as a motor and the like, the phase change device has the advantages of obvious advantages and simple structure, and directly outputs displacement and force through the thermoelastic phase change of the shape memory material 4 without a transmission mechanism. The most important advantage is that it has no pollution and noise, and can work under the condition of no friction and noise. And after a plurality of cycles, the stress-strain performance of the material is stabilized. The piezoelectric material 6 is preferably piezoelectric ceramic, and the braking strain of the currently best piezoelectric ceramic material is improved by about 6 times compared with the performance of the most traditional piezoelectric ceramic. Wherein the piezoelectric material 6 is preferably a shape memory alloy, in particular a nickel titanium shape memory alloy, which has the advantage that the proportion of work per mass of shape memory alloy is large. The performance of braking strain is closer by the optimal selection of the nickel-titanium shape memory alloy and the piezoelectric ceramics, the thermoelectric cycle time can be well controlled, and the power generation efficiency is maximized.
The waste heat power generation device comprises a device body, wherein the device body is divided into two main parts, the upper part is a heat exchange area 2, namely a phase change area of a shape memory material 4 (preferably a shape memory metal or a shape memory alloy, more preferably a shape memory metal is described as an example under a nickel-titanium shape memory alloy), and the lower part is a power generation area 3, namely piezoelectric ceramics, and the piezoelectric material (preferably the piezoelectric ceramics) and a transmission area of the shape memory material 4 and a transmission connector 5. The heat exchange area 2 controls the flow of hot gas through a waste gas heat source, and utilizes room-temperature air to reduce the temperature. The piezoelectric ceramic is driven by the transmission connector 5 to generate current by controlling the gas to pass through and bypass the heat exchange zone 2 so as to lead the shape memory material 4 to generate deformation in the heating and cooling processes. The generated current is regulated and stored in the energy storage device. The whole device and the system can be expanded and reduced according to the use requirements of users.
The optimization of the heat exchange zone 2 comprises two parts, one part is to insulate the heat exchange zone 2 and the power generation zone 3, so as to prevent the energy loss of the system and the interference of normal transmission caused by heat dissipation. In the other part, the heating and cooling period and the deformation rate of the shape memory material 4 of the heat exchange area 2 are controlled to realize the maximization of power generation so as to control the heating and cooling period of heat flow, so that the deformation rate of the shape memory material 4 is optimized, and the maximization of power generation is realized. The piezo ceramic stack may be adjusted according to the system characteristics of the waste heat. The waste heat power generation device and the battery energy storage system can be arranged into a plurality of groups and distributed along the exhaust emission direction as long as the temperature meets the requirement to achieve the target of preset electric power storage.
The shape memory material 4 and the transmission connector 5 are fixed by a physical method and are completely separated, the transmission connector 5 is in transition connection, so that sensitive elements are fully protected, and after finite element and fluid mechanics simulation analysis, transient heat transfer and thermal periodicity of material properties are thoroughly analyzed, so that energy conversion reaches an optimal value, and the operation is easier than welding even if replacement is needed. The improved method increases the stability of operation and reduces the processing cost.
The combination of the shape memory material 4 and the piezoelectric ceramic group and the transmission mode thereof are highlighted in the following three aspects:
on the first hand, the problem that the design current output value is small and is not enough for waste heat energy storage is solved because the shape memory material 4 and the piezoelectric material are both made into a sandwich composite plate in the traditional fixation. The invention adopts the property that the braking strain of the shape memory material 4 is greater than that of the piezoelectric ceramics, and the piezoelectric ceramics are made into a module form, so that the power generation can be carried out at multiple points through a linkage device to increase the power generation amount. The present design takes the simplest form of the wire-like shape memory material 4, which reduces both production and process requirements and costs.
In the second aspect, the problem that the traditional mode of binding the shape memory material 4 and the piezoelectric ceramic in the traditional fixation exposes both to the exhaust gas environment, and because the chemical composition of the exhaust gas is complex, water vapor or other corrosive gas in the exhaust gas can cause great damage to the working components in the process of temperature reduction is avoided.
In a third aspect, the fatigue and fracture that can occur in the weld joint due to the complexity of the composition of the shape memory material 4 in the conventional welding method is avoided, and the welding between different shapes of memory material 4 can be very challenging, which is particularly important for the particular shape memory material 4, especially for parts that are subjected to millions of heating and heat cycles. The welding method simplifies the production steps, but the performance cannot be guaranteed. Stability and operation of the system within design limits are important factors in ensuring economy.
Claims (8)
1. A waste heat power generation device comprises a device body and is characterized in that the device body comprises a heat exchange area and a power generation area, the heat exchange area comprises a gas passing space, a shape memory material penetrates through the heat exchange area and the power generation area, a piezoelectric material is arranged in the power generation area, the shape memory material and the piezoelectric material are both fixed on a transmission connector, a first channel for placing the shape memory material and a second channel for placing the piezoelectric material are arranged on the transmission connector, the first channel and the second channel are communicated and form an included angle of 90 degrees, the shape memory material deforms in the heating and cooling processes, pressure generated by deformation of the shape memory material drives the piezoelectric material to generate electric energy through the transmission connector, wherein the shape memory material is a shape memory metal or a shape memory alloy, the piezoelectric material is made of one or a combination of several of piezoelectric ceramics, piezoelectric ferroelectric materials, piezoelectric polymers and piezoelectric composite materials.
2. The cogeneration apparatus of claim 1, wherein said piezoelectric material is arranged in parallel and spaced in groups for multi-point coordinated power generation.
3. The cogeneration apparatus of claim 1 wherein said heat transfer zone controls the flow of hot gases through an exhaust gas heat source, cools through room temperature air, deforms the shape memory material during heating and cooling by controlling the passage of gases through and around the heat transfer zone, and drives the piezoelectric ceramic through the drive connector to generate electricity.
4. The cogeneration apparatus of claim 1, wherein said piezoelectric material is a piezoelectric ceramic and said shape memory material is a shape memory alloy.
5. The cogeneration apparatus of claim 1, wherein said cogeneration apparatus is provided with a plurality of groups, distributed along the direction of exhaust emission.
6. A battery energy storage system is characterized by comprising a waste heat collecting device, a waste heat collecting device and a control device, wherein the waste heat collecting device is used for collecting waste gas containing low-temperature waste heat; the waste heat power generation device is used for converting heat energy in waste heat into deformation of the shape memory material through the memory material and converting the deformation of the memory material into electric energy through the piezoelectric material; the electric energy conversion device is used for recovering and reducing the electric energy converted by the piezoelectric power generation device; an energy storage device for storing the electric energy recovered and subjected to reduction conversion by the electric energy conversion device, wherein the waste heat power generation device is the waste heat power generation device according to any one of claims 1 to 5.
7. The battery energy storage system of claim 6, wherein the energy storage device is a battery container.
8. The battery energy storage system of claim 7, wherein the batteries of the battery container are recycled batteries.
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| CN201811244953.7A CN109510509B (en) | 2018-10-24 | 2018-10-24 | Waste heat power generation device and battery energy storage system |
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