WO2022152757A1 - Verfahren zum betreiben eines verbrennungsmotors eines lastkraftfahrzeugs oder omnibusses - Google Patents
Verfahren zum betreiben eines verbrennungsmotors eines lastkraftfahrzeugs oder omnibusses Download PDFInfo
- Publication number
- WO2022152757A1 WO2022152757A1 PCT/EP2022/050558 EP2022050558W WO2022152757A1 WO 2022152757 A1 WO2022152757 A1 WO 2022152757A1 EP 2022050558 W EP2022050558 W EP 2022050558W WO 2022152757 A1 WO2022152757 A1 WO 2022152757A1
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- WO
- WIPO (PCT)
- Prior art keywords
- unit
- methanol
- truck
- carbon dioxide
- bus
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 20
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims abstract description 309
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 182
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 91
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 90
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 47
- 238000005868 electrolysis reaction Methods 0.000 claims abstract description 45
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 36
- 239000001257 hydrogen Substances 0.000 claims abstract description 36
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 36
- 238000001179 sorption measurement Methods 0.000 claims abstract description 36
- 238000003786 synthesis reaction Methods 0.000 claims abstract description 36
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000012080 ambient air Substances 0.000 claims abstract description 29
- 238000004519 manufacturing process Methods 0.000 claims abstract description 22
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000001301 oxygen Substances 0.000 claims abstract description 15
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 15
- 239000000284 extract Substances 0.000 claims abstract description 5
- 239000013535 sea water Substances 0.000 claims description 42
- 238000010612 desalination reaction Methods 0.000 claims description 27
- 239000000446 fuel Substances 0.000 claims description 18
- 239000007789 gas Substances 0.000 claims description 7
- 238000009826 distribution Methods 0.000 claims description 5
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 claims 1
- 239000003570 air Substances 0.000 description 31
- 239000003921 oil Substances 0.000 description 12
- 230000005611 electricity Effects 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 5
- 230000005855 radiation Effects 0.000 description 5
- 150000003839 salts Chemical class 0.000 description 5
- 238000000605 extraction Methods 0.000 description 4
- 150000002431 hydrogen Chemical class 0.000 description 4
- 230000001172 regenerating effect Effects 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- 230000001427 coherent effect Effects 0.000 description 3
- 239000003502 gasoline Substances 0.000 description 3
- 239000005431 greenhouse gas Substances 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000002803 fossil fuel Substances 0.000 description 2
- 239000013505 freshwater Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000011017 operating method Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 229910017741 MH2O Inorganic materials 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000000809 air pollutant Substances 0.000 description 1
- 231100001243 air pollutant Toxicity 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000036561 sun exposure Effects 0.000 description 1
Classifications
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- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/0663—Details on the fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02D19/0668—Treating or cleaning means; Fuel filters
- F02D19/0671—Means to generate or modify a fuel, e.g. reformers, electrolytic cells or membranes
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- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
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- F02D19/0644—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels at least one fuel being gaseous, the other fuels being gaseous or liquid at standard conditions the gaseous fuel being hydrogen, ammonia or carbon monoxide
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- B60K6/24—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the combustion engines
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- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
- B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
- B60K6/46—Series type
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- B60W20/10—Controlling the power contribution of each of the prime movers to meet required power demand
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- C—CHEMISTRY; METALLURGY
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- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
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- C07C29/15—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by reduction of oxides of carbon exclusively
- C07C29/151—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by reduction of oxides of carbon exclusively with hydrogen or hydrogen-containing gases
- C07C29/152—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by reduction of oxides of carbon exclusively with hydrogen or hydrogen-containing gases characterised by the reactor used
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
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- B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
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- F02B2043/106—Hydrogen obtained by electrolysis
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F02B63/042—Rotating electric generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B75/00—Other engines
- F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
- F02B75/18—Multi-cylinder engines
- F02B75/22—Multi-cylinder engines with cylinders in V, fan, or star arrangement
- F02B75/228—Multi-cylinder engines with cylinders in V, fan, or star arrangement with cylinders arranged in parallel banks
Definitions
- the invention relates to the use of methanol, in particular one produced in a globally CCh-neutral manner, as a fuel for an internal combustion engine of a truck or bus.
- the invention also relates to a method for operating an internal combustion engine of a truck or a bus and a truck or a bus with a sustainable drive system.
- Mobility especially of goods, is one of the most important prerequisites for economic success, employment and prosperity. At the same time, however, mobility also means a heavy environmental impact from transport systems and from the global traffic volume, which has increased continuously over the past decades. The efficiency of internal combustion engines has improved significantly and they have become cleaner and quieter. Due to the increased traffic, however, large quantities of greenhouse gases and air pollutants are still being produced and released into the atmosphere. With the increase in traffic, the energy consumption of traffic in Germany, for example, has more than tripled since 1960. Traffic is currently responsible for around a fifth of greenhouse gas emissions in Germany. What applies to the environmental and climate pollution in Germany also applies to the global climate situation, which suffers significantly from the burning of fossil fuels in road traffic.
- the annual greenhouse gas emissions in the transport sector are to be reduced from currently around 160 million tons of CCh equivalents to 95 to 98 million tons of CO2 equivalents in 2030, for example with the climate protection plan 2050 adopted in Germany .
- the European Commission is also pursuing the goal of decarbonising the European mobility system by 2050, i.e. making it greenhouse gas-neutral. Success depends on whether the measures taken to achieve these goals are supported by broad sections of society and whether these measures are economical are.
- the central goal is to ensure that the current mobility needs of broad sections of the population are met in the most environmentally friendly way possible. This means that a successful mobility solution not only has to be technically feasible and target-oriented, but also has to be measured against the costs of current mobility solutions.
- methanol plays an important role as a fuel.
- the production of methanol takes place through the synthesis of hydrogen and carbon dioxide, which are obtained regeneratively or in a greenhouse gas-neutral manner.
- WO 2018/112654 A1 describes a method in which hydrogen is produced by electrolysis and carbon dioxide is obtained by direct separation from the ambient air, which is used to produce methanol.
- the known method is not suitable for providing an energy source in sufficient quantity and with the required economic efficiency in order to noticeably reduce the impact on the climate and at the same time meet current mobility needs.
- the object of the invention is to provide a way of operating trucks and buses in a climate-friendly manner without significantly reducing their payload. Furthermore, the object of the invention is to specify a climate-friendly operating method for trucks and buses and a truck or a bus with a climate-friendly drive system. According to the invention, this object is achieved by an operating method according to patent claim 1, a use according to patent claim 5 and a truck or a bus according to patent claim 7.
- the invention is based on the idea of specifying the use of methanol as a fuel for an internal combustion engine of a truck or bus, in particular a truck or bus with a permissible total weight of at least 3.5 tons.
- the methanol is produced in a process in which
- the hydrogen and the carbon dioxide are supplied to a methanol synthesis unit for the production of methanol and are synthesized therein to form methanol and
- a photovoltaic unit absorbs solar energy and converts it into electrical energy.
- the electrolysis unit, the carbon dioxide sorption unit and the methanol synthesis unit are operated by the electrical energy generated in the photovoltaic unit.
- a truck or bus can be operated in a climate-friendly, particularly climate-neutral manner, with the payload being essentially the same as in conventionally powered trucks or buses.
- this technology offers potential for achieving climate-neutral mobility and climate-neutral goods transport.
- the methanol which is preferably produced in a CO2-neutral manner in regions with high annual solar radiation, for example in Saudi Arabia, Oman, Australia or other regions that have a continuously high Have sun exposure is easy to carry and store. Therefore, methanol is particularly suitable as an energy source that can be used worldwide.
- methanol has a sufficient energy density so that it can be used sensibly for freight transport or bus transport, especially for longer journeys. Refueling is also much faster than charging a battery, so that such a drive concept can be expected to be more widely accepted in the operation of trucks and buses, which is strongly driven by economic considerations. This applies in particular to the operation of heavy long-distance trucks or touring coaches.
- the methanol is used as a fuel for an internal combustion engine of a truck or a bus with a permissible total mass of at least 3.5 tons, in particular at least 5 tons, in particular at least 7.5 tons, in particular at least 10 tons, in particular at least 15 tons , is used.
- a preferred embodiment provides that the water is first desalinated in a seawater desalination unit and then fed to the electrolysis unit, the seawater desalination unit being operated mainly, in particular completely, by the electrical energy generated in the photovoltaic unit.
- the photovoltaic unit can have an output, in particular peak output, of at least 1.0 gigawatt, in particular at least 1.3 gigawatt, in particular at least 1.5 gigawatt.
- the seawater desalination unit for producing desalinated water preferably has a capacity of at least 900,000 tons of seawater per year.
- the electrolysis unit can be connected by at least one pipeline to the seawater desalination unit for the supply of water, in particular desalinated water.
- the carbon dioxide sorption unit for sorption of carbon dioxide from the ambient air can have an extraction capacity of at least 400,000 tons of carbon dioxide per year, in particular at least 600,000 tons of carbon dioxide per year from the ambient air.
- the methanol synthesis unit can be used to produce methanol through at least one pipeline to the electrolysis unit for supplying hydrogen and be connected by at least one pipeline to the carbon dioxide sorption unit for the supply of carbon dioxide.
- the seawater desalination unit, the electrolysis unit, the carbon dioxide sorption unit and the methanol synthesis unit can each be connected to the photovoltaic unit for power supply and can be arranged in a coherent system area with the photovoltaic unit.
- the methanol is produced in a region with high solar radiation, in particular solar radiation of more than 2000 kWh/m 2 a, in particular more than 2300 kWh/m 2 a, in particular more than 2500 kWh/m 2 a .
- the photovoltaic unit can absorb at least 1500 kWh/m 2 a, in particular at least 2000 kWh/m 2 a, in particular at least 2300 kWh/m 2 a, in particular at least 2500 kWh/m 2 a, in particular at least 2700 kWh/m 2 a be adapted to solar energy.
- the methanol synthesis unit can have an output capacity of at least 300,000 tons, in particular at least 450,000 tons, of regeneratively produced methanol per year.
- a discharge capacity of 450,000 tons of renewably produced methanol per year is particularly preferred.
- the process-technically relevant units of the system can each be connected to the photovoltaic unit for power supply and can be arranged together with the photovoltaic unit in a coherent system area. This means that the individual units are arranged in close proximity to each other and combined in a uniform system. It is not necessary for the investment area to be closed.
- the individual units can be separated from one another, for example, by supply roads that run through the plant. This ensures that the transport of material flows and the power supply between the units takes place with the lowest possible losses.
- the system as a whole is constructed in such a way that it can be positioned in a location-optimized manner and operated independently.
- the special advantage of the combination of the seawater desalination unit and the Photovoltaic unit is that the system can be placed in geographical regions, such as the Middle East or Africa, which have both high levels of solar radiation and access to seawater, so that on the one hand the energy supply of the system by the photovoltaic unit and on the other hand the provision of sufficiently large Amounts of water for the electrolysis unit is made possible in an economical manner.
- the system By supplying power to the electrolysis unit, which is provided exclusively by the photovoltaic unit, the system produces hydrogen in a regenerative manner.
- the carbon dioxide required for the production of methanol can be extracted from the ambient air of the plant by the carbon dioxide sorption unit.
- methanol production takes place in a regenerative manner without the generation of carbon dioxide. Rather, the carbon dioxide concentration in the atmosphere is even reduced by removing the carbon dioxide from the ambient air.
- the plant is therefore suitable for being part of a climate-neutral energy system that forms a global carbon dioxide cycle with regeneratively produced methanol as an energy source.
- the amount of carbon dioxide removed from the ambient air does not have to be disposed of or dumped, as is usually the case, for example with the known storage of carbon dioxide in deep layers of rock, although this is not excluded as an additional measure, for example.
- the carbon dioxide sorbed from the ambient air is a valuable substance that is used in the plant for the production of a synthetic fuel, namely methanol, and can thus be fed into a carbon dioxide cycle.
- the system enables the economic efficiency of the measures taken, which is necessary for the implementation of the climate targets mentioned above. Compared to the production and use of hydrogen for fuel cells, the conversion losses increase due to the additional process steps required for the synthesis of methanol. However, this is offset by much greater economic advantages in terms of the global infrastructure costs that arise when burning methanol compared to purely electric drives or fuel cell technology. The costs for complex charging stations or for the technically complex storage of hydrogen are eliminated when burning regeneratively manufactured methanol. The storage and transport of methanol does not require any special measures and is comparable to the handling of conventional fuels.
- Another advantage of regeneratively produced methanol compared to the energy sources hydrogen or batteries is that the energy density of methanol at 4.35 kWh/liter is much higher than that of high-pressure hydrogen (800 bar) at 1.25 kWh/liter. liquid hydrogen with 2.36 kWh/litre and batteries with 0.5 kWh/litre.
- a comparison of current energy prices which is intended to give an approximate indication of the energy costs of a plant for the regenerative production of methanol, shows that the photovoltaic unit provided as part of the plant is an important component in order not only to produce synthetic fuel in a regenerative way, but this can also be produced so economically that the fuel can assert itself in competition with other energy sources.
- the energy prices for wind energy (2.39 EURct/kWh) and hydropower energy (1.71 EURct/kWh) are currently (2020) already well below the energy prices for fossil fuels and, of course, nuclear energy.
- the energy price for generating electricity from photovoltaics is even lower, at 1.14 EURct/kWh for electricity generated in regions with high and long periods of sunshine, such as the Middle East or Africa.
- Photovoltaic systems for example with an installed capacity of 2 gigawatts, already exist there and are able to produce electricity at the price mentioned above.
- the system can be designed to be installed in regions in which large areas cannot be used for agriculture because these are deserts or steppes, so that sufficiently large areas are available for a correspondingly large photovoltaic unit.
- the power, in particular the peak power of the photovoltaic unit is preferably at least 1.0 gigawatt, in particular at least 1.3 gigawatt, in particular at least 1.5 gigawatt.
- the seawater desalination unit for the production of desalinated water is designed for a capacity of at least 900,000 tons of seawater per year.
- the carbon dioxide sorption unit is preferably designed for an extraction capacity of at least 400,000 tons of carbon dioxide per year, in particular at least 600,000 tons of carbon dioxide per year from the ambient air.
- the seawater desalination unit and the carbon dioxide sorption unit are thus tuned in terms of performance to the methanol synthesis unit, which has a delivery capacity of at least 300,000 tons, in particular at least 450,000 tons of regeneratively produced methanol per year.
- the electricity required for the power supply of the above process units, including the electrolysis unit, is provided by the photovoltaic unit, which is capable of absorbing at least 1500 kWh/m 2 a, in particular at least 2000 kWh/m 2 a, in particular at least 2300 kWh/m 2 a, in particular at least 2500 kWh / m 2 a, in particular at least 2700 kWh / m 2 a solar energy is adapted.
- the unit kWh/m 2 a means kilowatt hours per square meter and year.
- the system can form the basic unit for a larger system complex with several systems that are designed in accordance with the system described above. This means that the production of methanol can be scaled up in larger quantities, so that with a corresponding number of plants, a large, and in particular the entire, energy requirement of the world population can be covered.
- the invention is also based on the idea of specifying a method for operating an internal combustion engine of a truck or bus, in particular a truck or a bus with a permissible total weight of at least 3.5 tons, in which
- the hydrogen and the carbon dioxide are supplied to a methanol synthesis unit for the production of methanol and synthesized therein to form methanol,
- a photovoltaic unit absorbs solar energy and converts it into electrical energy.
- the electrolysis unit, the carbon dioxide sorption unit and the methanol synthesis unit are operated by the electrical energy generated in the photovoltaic unit, with the methanol produced being transported to at least one tank of the truck or bus by means of a distribution system and fed from the tank to the internal combustion engine as required and used there for Generating mechanical energy is burned.
- the distribution system is preferably adapted to distribute the regeneratively produced methanol from the dispensing device to end users for incineration of the regeneratively produced methanol.
- the distribution system is designed, for example, in the form of a logistics network in which the methanol is transported to gas stations in tankers.
- the tank, in particular a methanol fuel tank, of the truck or bus can be filled up with methanol at the filling stations.
- the distribution system can be preceded by a transport system which is connected or can be connected to the methanol synthesis unit of the plant according to the invention and is adapted to transport the methanol produced regeneratively by the methanol synthesis unit from the methanol synthesis unit to at least one delivery device.
- the transport system can be stationary or mobile and can include, for example, pumps and pipelines or transport by tankers. Transport systems that are known per se, for example for the transport of crude oil, can be used here.
- the dispensing device may be a storage tank at a port or at a pumping station.
- Combustion of the regeneratively produced methanol produces carbon dioxide, which is released into the atmosphere.
- the desired carbon dioxide cycle is closed by the carbon dioxide sorption unit separating the carbon dioxide that has gotten into the atmosphere directly or indirectly from it and using it for the methanol production process.
- the methanol produced in this way and thus the carbon dioxide used for its production are returned to the carbon dioxide cycle.
- the fact that the trucks or buses using the methanol and the place where the methanol is produced are far apart from one another is irrelevant, since it is about the overall balance of carbon dioxide in the atmosphere, which remains constant due to the closed carbon dioxide cycle. It is even possible to reduce the concentration of carbon dioxide in the atmosphere if the carbon dioxide sorption unit removes excess carbon dioxide from the atmosphere that is not recycled through methanol as an energy carrier. The excess carbon dioxide is then disposed of in other ways, for example by storing it in deep rock strata, which is already practiced in Iceland.
- the water is desalinated in a seawater desalination unit and then fed to the electrolysis unit, the seawater desalination unit being operated mainly, in particular completely, by the electrical energy generated in the photovoltaic unit.
- the methanol is used as the main fuel in the internal combustion engine.
- the methanol therefore does not form an additive that is mixed with another fuel. Rather, the methanol is used in such a way that the internal combustion engine is operated directly with it.
- the internal combustion engine is preferably a reciprocating engine which is operated with a compression ratio of at least 14:1, in particular at least 16:1, in particular at least 18:1, in particular at least 20:1.
- the reciprocating engine can in particular be a four-stroke gasoline engine.
- the diesel engine currently has a high market share in trucks and buses.
- the use of methanol enables the operation of a gasoline engine with an otherwise unusually high compression.
- a large part of the very complex exhaust gas aftertreatment required for diesel engines is no longer necessary, which saves space and weight and thus further increases the efficiency of the truck or bus.
- space is made available in this way in order to integrate a drive battery for a hybrid drive train into the truck or bus, with the payload being essentially retained.
- a portion of the methanol can be split in a splitting unit into a synthesis gas that comprises or consists of hydrogen and carbon monoxide, and the synthesis gas alone or together with the methanol can be fed into the reciprocating engine, with the splitting unit in the truck or bus, in particular between a tank and the reciprocating engine, is arranged.
- the synthesis gas can increase the ignitability of the methanol fuel and thus contribute to even more efficient operation of the reciprocating engine.
- the power unit comprises a two-cylinder reciprocating piston engine with two cylinder-piston units in tandem arrangement and at least one generator for generating electrical energy, each cylinder-piston unit having a crankshaft and the crankshafts of both cylinder-piston units being mechanically coupled to one another, and at least one crankshaft, in particular both crankshafts, respectively, is mechanically connected to the at least one generator.
- the two-cylinder reciprocating engine is preferably adapted for operation with methanol, in particular regeneratively produced methanol, as the main fuel.
- the electric motor preferably acts via a gear or directly on a wheel axle.
- a tank can be provided which is fluidly connected to the two-cylinder reciprocating piston engine and at least partially, preferably completely, filled with regeneratively produced methanol. It is possible for the drive system to have a plurality of generators, each of which is electrically connected to a common drive battery or to a number of separate drive batteries. It is particularly preferred if the two-cylinder reciprocating piston engine of the truck described above or of the omnibus described above is operated according to the method described above.
- FIG. 1 shows a perspective view of a plant for the production of a globally usable energy source according to a preferred exemplary embodiment of the invention
- FIG. 2 shows a perspective view of a plant for the production of a globally usable energy carrier according to a further preferred embodiment of the invention
- FIG. 3 shows a plan view of a flat system area of the system according to FIG. 2;
- FIG. 4 shows a schematic cross section through the planar system area of the system according to FIG. 3;
- FIG. 5 shows a flow chart of the method for producing a globally usable energy carrier with the system according to FIG. 1 or the system according to FIG. 2 and
- FIG. 6 shows a cross-sectional view of a power unit of a truck or bus according to the invention according to a preferred embodiment.
- Fig. 1 shows the embodiment of a plant 10, which is designed for the production of a globally usable energy source in the form of methanol.
- the Plant 10 comprises an electrolysis unit 11, a carbon dioxide sorption unit 12, a seawater desalination unit 27 and a methanol synthesis unit 34.
- a photovoltaic unit 24 is provided for the power supply of the above-mentioned units, which is electrically connected to the corresponding units 11, 12, 27, 34.
- the plant components mentioned above are arranged on a coherent plant site, so that the exchange of material and energy flows between the various units and the power supply take place with the lowest possible losses.
- the shape of the plant is not limited to the shape shown in FIG.
- the electrolysis unit 11 is connected to the seawater desalination unit 27 by at least one pipeline (not shown) for the supply of water, in particular desalinated water.
- the desalinated water is fed to the electrolysis unit 11 through the pipeline.
- the methanol synthesis unit 34 is connected on the one hand to the electrolysis unit 11 by at least one pipeline and on the other hand to the carbon dioxide sorption unit 12 by at least one further pipeline.
- the hydrogen produced in the electrolysis unit 11 and the carbon dioxide separated in the carbon dioxide sorption unit 12 are fed to the methanol synthesis unit 34 through the two pipelines. In the methanol synthesis unit 34, methanol is produced therefrom.
- the seawater desalination unit can be designed in such a way that it can absorb and desalinate at least 900000 t seawater per year.
- the carbon dioxide sorption unit can be designed for an extraction capacity of at least 400,000 tons of carbon dioxide per year, in particular at least 600,000 tons of carbon dioxide per year, which is removed from the ambient air.
- the methanol synthesis unit 34 is adapted to produce at least 300,000 t, in particular 450,000 t, of regeneratively produced methanol per year.
- the photovoltaic unit 24 can have an output of approximately 1.5 GW and, depending on the solar radiation, can absorb at least 1500 kWh/m 2 a. For the one in Fig. 1 chosen location in the Middle East, the photovoltaic unit 24 is preferably adapted to absorb at least 2500 kWh/m 2 a.
- the electrolysis unit 11 is designed to split a quantity of water M HZO into an oxygen subset M02 and a hydrogen subset by electrolysis.
- the electrolysis unit 11 thus forms a unit for water electrolysis.
- the electrolysis unit 11 is connected to a water supply line 13 for receiving the amount of water M H2O.
- a pump unit 25 is arranged between the electrolysis unit 11 and the water supply line 13 .
- the pump unit 25 has at least one pump for transporting water from a water reservoir 26 .
- the water reservoir 26 can be a sea of sea water. Alternatively, the water reservoir 26 may be a fresh water lake. It is also possible that the water supply line 13 is connected to a river to take fresh water for water electrolysis.
- the water supply line 13 is connected to a sea for taking sea water.
- the system 10 is preferably arranged near the coast in order to keep the distance to the water supply, in particular the water supply line 13, short.
- the pump unit 25 is designed to pump seawater out of the sea and to make it available to other system parts or units for further processing.
- the system 10 has a seawater desalination unit 27 .
- the seawater desalination unit 27 is connected to the pump unit 25 by at least one pipeline.
- the seawater desalination unit 27 is adapted to separate out a specific proportion of salt from the conveyed quantity of seawater M H2O, so that the seawater has a reduced salt content after the desalination process by the seawater desalination unit 27 .
- the amount of desalinated seawater M H 2O corresponds to the amount of water M H 2O that is broken down by the electrolysis unit 11 into an oxygen subset MO2 and a hydrogen subset.
- the electrolysis unit 11 is connected to the seawater desalination unit 27 by at least one pipeline. In order to convey the desalinated seawater from the seawater desalination unit 27 to the electrolysis unit 11, at least one further pump can be interposed. As described above, the electrolysis unit 11 is designed to split the absorbed water quantity M HZO into a hydrogen sub-quantity and an oxygen sub-quantity MO2. The hydrogen portion is fed to the methanol synthesis unit 34 . The oxygen subset M02 is released into the environment.
- the electrolysis unit 11 is preferably adapted to separate an oxygen partial quantity MO2 of at least 1.2 kg and a quantity of hydrogen of at least 0.15 kg, in particular 0.19 kg, from a quantity of water M H2O of at least 1.5 kg.
- the electrolysis unit 11 has an oxygen outlet 16 which opens into the outside atmosphere.
- the plant 10 has a hydrogen transport device for supplying the hydrogen to the methanol synthesis unit 34, which is not shown.
- the plant 10 prefferably has a hydrogen store so that the methanol synthesis unit 34 can be supplied with hydrogen as continuously as possible.
- the carbon dioxide sorption unit 12 has an air inlet 14 for supplying the ambient air UL and a downstream sorber device 15 . It is possible for the carbon dioxide sorption unit 12 to have one or more air inlets 14 .
- the sorber device 15 is connected to the air inlet 14 .
- the sorber device 15 is adapted to extract an amount of carbon dioxide from the ambient air UL.
- the carbon dioxide sorption unit 12 further has an air outlet 17 oriented upward in the vertical direction.
- the air outlet 17 serves to discharge the exhaust air UL′, the carbon dioxide concentration of which is lower than the carbon dioxide concentration of the ambient air UL.
- the air outlet 17 is part of a chimney 19.
- the sorber device 15 is arranged between the air inlet 14 and the air outlet 17 .
- the ambient air UL flows through the air inlet 14 to the sorber device 15, which separates, in particular filters, a certain amount of carbon dioxide from the air UL, with the filtered output air UL' flowing after the sorber device 15 through the air outlet 17 into the outside atmosphere.
- the sorber device 15 it is possible for several air inlets 14, several sorber devices 15 and several air outlets 17 to be provided.
- a single chimney 19 with a height H of 200 meters is shown in FIG. 1, which shows the external structure of the carbon dioxide sorption unit 12 as an example.
- the air outlet 17 also opens into the outside atmosphere, just like the oxygen outlet 16.
- the system 10 also includes a carbon dioxide transport device, not shown, which is designed to make the quantity of carbon dioxide separated from the ambient air UL available to a carbon dioxide store and/or the methanol synthesis unit 34 for further processing.
- the purpose of the carbon dioxide store is to ensure that the methanol synthesis unit 34 is supplied with carbon dioxide as continuously as possible.
- the carbon dioxide sorption unit 12 can have an extraction capacity of at least 400,000 tons, in particular 600,000 tons, of carbon dioxide per year. In other words, the carbon dioxide sorption unit 12 can be designed to process at least 1500 megatons of ambient air per year. Specifically, the carbon dioxide sorption unit 12 is preferably adapted to extract at least 1.4 kg of carbon dioxide from at least 3300 kg of ambient air.
- the system 10 has a flat system area 23 .
- the flat plant area 23 directly adjoins the electrolysis unit 11 .
- a power generation unit 31 which is a photovoltaic unit 24 , is arranged on the flat system area 23 .
- the photovoltaic unit 24 is connected to the respective units of the system 10 for power supply.
- the photovoltaic unit 24 is adapted in such a way that the entire system 10 can be operated in an energy self-sufficient manner. This means that the electrical power for operating the entire system 10 can be provided exclusively by solar energy using the photovoltaic unit 24 . In other words, preferably no fossil energy sources are used for the operation of the system 10 .
- the flat plant area 23 can have a longitudinal extent 32 of approximately 5000 meters and a transverse extent 33 of approximately 2000 meters.
- the planar plant area of the plant 10 is preferably formed over an area of 10 square kilometers.
- the one shown in fig Plant area including the electrolysis unit 11 can have a partial longitudinal extension 29 of approximately two kilometers. Other partial longitudinal, longitudinal and transverse extensions 29, 32, 33 are possible.
- the sea water desalination unit 27 described above is connected to a water return line 28 through which a quantity of sea water M'HZO to be returned with an increased salt content is returned to the sea. Specifically, a specific salt content is extracted from the amount of seawater removed and then returned to the sea with part of the amount of seawater removed as the amount of water M'HZO to be returned. This provides a water cycle that is harmless to nature.
- the preferred location of the system 10 is near the coast of a sea.
- the system 10 is particularly preferably set up in a desert.
- a methanol delivery line 35 may connect the system 10 to a methanol delivery point, such as at a port.
- the system 10 according to FIG. 1 is a large power plant.
- the system 10 can have at least one assembly area 18 which is connected to a foundation of a building and/or a structure. It is generally possible for the electrolysis unit 11 and/or the carbon dioxide sorption unit 12 to be arranged in a common building or in separate buildings.
- the power supply unit 31 preferably has a power store, not shown, which is adapted to power the system 10 in night-time operation.
- FIG. 2 shows a system 10 in which the individual carbon dioxide sorption unit 12 is replaced by a plurality of carbon dioxide sorption units 12 .
- the respective carbon dioxide sorption unit 12 according to FIG. 2 has a chimney 19 and a flow channel 21 running transversely to the chimney 19 . This can be clearly seen in FIG. 4, for example.
- the flow channel 21 is connected to the chimney 19 at a region of the chimney which is arranged at the bottom in the installed position.
- a sorber device 15 is arranged between the flow channel 21 and the chimney 19 and is designed to extract a quantity of carbon dioxide from the ambient air UL to extract.
- the sorber device 15 is formed by an amine exchanger. Other types of sorbers are possible.
- the chimneys 19 are arranged along the longitudinal extent 32 of the planar contact area 23 .
- the flat contact area 23 has a surface 22 arranged at the top in the installed position.
- the surface 22 arranged at the top is dark-colored, at least in sections, in order to absorb solar energy.
- the flow channels 21 are arranged below the surface 22 arranged at the top.
- a plurality of air inlets 14 are formed in the surface 22 arranged at the top for supplying ambient air UL into the flow channels 21 .
- the air inlets 14 form passage openings through the surface 22 arranged at the top. These are shown in FIG. 3 only on the first flow channel 21 for the sake of better illustration. The number of air inlets 14 is also variable.
- ambient air flows through the air inlets 14 into the flow channel 21 and then through the sorber device 15.
- the exhaust air UL′ with a reduced carbon dioxide concentration flows into the chimney 19 and through the air outlet 17 into the outside atmosphere.
- the temperature of the ambient air UL in the flow channel 21 is preferably approx. 60°C.
- the arrangement of the chimney with the flow channel 21 and the dark-colored surface 22 produces natural ventilation. In other words, no fan or blower is required for the supply of the ambient air UL into the flow channel 21 and for the flow through the sorber device 15 and the outflow of the cleaned ambient air UL′ from the chimney 19 .
- Fig. 3 shows a plan view of the flat system area 23 of the system 10 according to Fig. 2.
- the numbering from 1 to 40 shown along the longitudinal extension 32 represents the number of chimneys 19 arranged on the longitudinal extension 32.
- the lines running transversely to the longitudinal extension 32 show schematic separations between the individual flow channels 21.
- the individual flow channels 21 are each associated with a chimney 19.
- the longitudinal extension 32 of the planar installation area 23 is approximately 5000 meters and the transverse extension 33 of the planar installation area 23 is approximately 2000 meters.
- a total of forty chimneys 19 with a total of forty flow channels 21 are provided in the flat system area 23 . These have a combined discharge capacity of discharged air UL' of at least 1800 megatons per year.
- the chimneys 19 have a diameter D which is 25 meters.
- the diameter D refers to that area of the chimney 19 in which the air outlet 17 is formed.
- the air outlet 17 is formed at a free end of the chimney 19 .
- the respective chimney 19 has a height H of 100 meters. This creates an optimal shape for the chimney effect for natural ventilation. Other dimensions of the chimneys 19 are possible.
- chimneys 19 each with an associated flow channel 21 , can be arranged in the flat system area 23 .
- the flat contact area 23 is provided with a photovoltaic unit 24 on the surface 22 arranged at the top.
- a photovoltaic unit 24 on the surface 22 arranged at the top of the flat system area
- a photovoltaic unit 24 is arranged.
- the photovoltaic unit 24 preferably has an output of 1.5 gigawatts per year.
- the carbon dioxide sorption unit 12 and the photovoltaic unit 24 spatially form a common unit.
- the plant 10 is supplied with an amount of approximately 2 kg of seawater and desalinated in the seawater desalination unit 27 .
- Approx. 1.13 kg of desalinated water are produced in the process. That Residual salt water (approx. 0.87 kg) is returned to the sea through the water return line 28 .
- the desalinated water and any additional amounts of water that occur in later process steps are split into hydrogen (approx. 0.19 kg) and oxygen (approx. 1.5 kg).
- the carbon dioxide sorption unit 12 takes in about 3371.75 kg of air through the air inlet 14 and extracts about 1.38 kg of carbon dioxide therefrom.
- Hydrogen and carbon dioxide are fed to the methanol synthesis unit and processed there into 1 kg of methanol.
- the excess heat produced during the synthesis is fed to the carbon dioxide sorption unit 12 .
- the synthesis also produces water in an amount of approx. 0.56 kg, which is fed to the electrolysis unit.
- the photovoltaic system converts around 51 kWh of solar energy into around 12.83 kWh of usable electricity.
- the generator 120 includes a two-cylinder reciprocating engine 121 with a first cylinder-piston unit 122 and a second cylinder-piston unit 123.
- Each of the cylinder-piston units 122, 123 includes a piston 124 which is guided in a cylinder 125.
- the piston 124 is coupled to a connecting rod 126 that connects the piston 124 to a crankshaft 127 .
- the crankshafts 127 are aligned parallel to one another and each carry spur gears 127a which have external teeth.
- the externally toothed spur gears 127a mesh so that the spur gears 127a rotate in opposite directions.
- Each spur gear 127a is coupled to a generator 130 via a toothed belt 128 .
- a total of two generators 130 are provided.
- the generators 130 also include balancing weights 130a, which bring about a balancing of the inertia forces and the inertia moments.
- the generator set 120 further includes a cam belt 131 connecting one of the crankshafts 127 to camshafts 132 .
- a camshaft 132 is assigned to each cylinder-piston unit 122, 123 in each case.
- the camshafts 132 each act on valves 133, with each cylinder-piston unit preferably having four valves 133 each.
- an oil pan 134 is provided, in which an oil pump 135 is arranged.
- the oil pump 135 is driven by an oil pump belt 136 connecting the oil pump 135 to one of the crankshafts 127 .
- the oil pump 135 is preferably connected to a different crankshaft 127 than the camshafts 132 .
- An oil filter 137 is also arranged on the oil pan 134 .
- the power unit 120 has a particularly compact design. It manages with relatively few parts and is therefore maintenance-friendly and has a low weight.
- the two-cylinder reciprocating engine is particularly low-noise and low-vibration.
- the two-cylinder reciprocating engine can be encapsulated in a housing, in which case the housing can also contribute to the low level of noise and vibration.
- the drive system of a truck or bus can have multiple generators 120 that interact to generate electricity and feed drive batteries.
- the cylinders 125 of the cylinder-piston units 122, 123 are arranged in an offset manner with respect to one another.
- the center axes of the cylinders 125 are at a smaller distance from one another than the center axes of the crankshafts 127 .
- Characterized the connecting rods 126 are at the top dead center of the piston 124, as shown in Fig. 6, slightly inclined to each other. This massively reduces the vibrations when the motor starts up. In particular, when starting the power unit 120, starting moments of inertia are reduced in this way, so that the otherwise known starting vibrations do not occur.
- the power unit 120 is preferably operated to drive a truck or bus and, via the generators 130, provides the electrical energy that is required for the ferry operation in order to use the electric motors.
- a 48 volt, 400 volt or 800 volt system is preferably integrated as the electrical system.
- the drive batteries are preferably dimensioned so that the truck or bus can travel between 10 km and 120 km, in particular between 20 km and 100 km, in particular between 25 km and 60 km, exclusively electrically, ie without operating the generator.
- the generator set 120 is powered by the renewably produced methanol.
- a corresponding tank is provided for this purpose, which takes up regeneratively produced methanol or is filled with it. In this way, a particularly economical and at the same time climate-friendly operation of the truck or bus is possible.
- the invention offers a technically feasible and economical solution to the acute climate problem, which can be implemented within a reasonable time frame due to the scalability of the systems described.
- the invention takes into account the geographical opportunities that certain regions of the world offer and impresses with its simplicity.
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- Organic Chemistry (AREA)
- Automation & Control Theory (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
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Abstract
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Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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CN202280009919.XA CN116710304A (zh) | 2021-01-13 | 2022-01-12 | 用于驱动载重交通工具或公共汽车的内燃发动机的方法 |
US18/272,003 US20240003305A1 (en) | 2021-01-13 | 2022-01-12 | Method of operating an internal combustion engine of a truck or omnibus |
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DE102021100545.0 | 2021-01-13 | ||
DE102021100545.0A DE102021100545A1 (de) | 2021-01-13 | 2021-01-13 | Verwendung eines global nutzbaren Energieträgers als Kraftstoff für ein Lastkraftfahrzeug oder einen Omnibus |
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WO2022152757A1 true WO2022152757A1 (de) | 2022-07-21 |
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PCT/EP2022/050558 WO2022152757A1 (de) | 2021-01-13 | 2022-01-12 | Verfahren zum betreiben eines verbrennungsmotors eines lastkraftfahrzeugs oder omnibusses |
Country Status (4)
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US (1) | US20240003305A1 (de) |
CN (1) | CN116710304A (de) |
DE (1) | DE102021100545A1 (de) |
WO (1) | WO2022152757A1 (de) |
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DE102021100539A1 (de) * | 2021-01-13 | 2022-07-14 | Obrist Technologies Gmbh | Verwendung eines global nutzbaren Energieträgers als Kraftstoff für ein Wasserfahrzeug |
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DE19714512C2 (de) | 1997-04-08 | 1999-06-10 | Tassilo Dipl Ing Pflanz | Maritime Kraftwerksanlage mit Herstellungsprozeß zur Gewinnung, Speicherung und zum Verbrauch von regenerativer Energie |
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US8114363B1 (en) * | 2005-08-22 | 2012-02-14 | Ergenics Corporation | Liquid and gaseous fuel production from solar energy |
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DE102010022746A1 (de) * | 2010-06-04 | 2011-12-08 | Robert Bosch Gmbh | Verfahren zum Betrieb einer Stromerzeugungsanlage |
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2021
- 2021-01-13 DE DE102021100545.0A patent/DE102021100545A1/de active Pending
-
2022
- 2022-01-12 WO PCT/EP2022/050558 patent/WO2022152757A1/de active Application Filing
- 2022-01-12 CN CN202280009919.XA patent/CN116710304A/zh active Pending
- 2022-01-12 US US18/272,003 patent/US20240003305A1/en active Pending
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EP1225073A2 (de) * | 2001-01-19 | 2002-07-24 | Transportation Techniques, LLC | Hybridfahrzeug und auswählbare Verfahren zu seinem Betrieb |
WO2013055673A1 (en) * | 2011-10-12 | 2013-04-18 | Massachusetts Institute Of Technology | Reformer enhanced alcohol engine |
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Publication number | Publication date |
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CN116710304A (zh) | 2023-09-05 |
US20240003305A1 (en) | 2024-01-04 |
DE102021100545A1 (de) | 2022-07-14 |
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