CN116378863B - Distributed multi-source energy supply integrated system based on zero-carbon internal combustion engine - Google Patents
Distributed multi-source energy supply integrated system based on zero-carbon internal combustion engineInfo
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- CN116378863B CN116378863B CN202310313641.1A CN202310313641A CN116378863B CN 116378863 B CN116378863 B CN 116378863B CN 202310313641 A CN202310313641 A CN 202310313641A CN 116378863 B CN116378863 B CN 116378863B
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- heat exchanger
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- fuel
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- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 55
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 29
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 188
- 239000000446 fuel Substances 0.000 claims abstract description 96
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 94
- 238000003860 storage Methods 0.000 claims abstract description 26
- 230000002441 reversible effect Effects 0.000 claims abstract description 25
- 239000001257 hydrogen Substances 0.000 claims abstract description 14
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 14
- 239000002918 waste heat Substances 0.000 claims abstract description 9
- 230000005540 biological transmission Effects 0.000 claims abstract description 5
- 125000004435 hydrogen atom Chemical class [H]* 0.000 claims abstract 2
- 230000006835 compression Effects 0.000 claims description 26
- 238000007906 compression Methods 0.000 claims description 26
- 238000010521 absorption reaction Methods 0.000 claims description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 239000007789 gas Substances 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 4
- 230000010354 integration Effects 0.000 abstract description 6
- 239000003638 chemical reducing agent Substances 0.000 abstract description 5
- 230000008878 coupling Effects 0.000 abstract description 4
- 238000010168 coupling process Methods 0.000 abstract description 4
- 238000005859 coupling reaction Methods 0.000 abstract description 4
- 238000003763 carbonization Methods 0.000 abstract description 3
- 239000000779 smoke Substances 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 12
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 8
- 238000004146 energy storage Methods 0.000 description 7
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- 239000003507 refrigerant Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000005057 refrigeration Methods 0.000 description 5
- 230000005611 electricity Effects 0.000 description 4
- 239000002912 waste gas Substances 0.000 description 4
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 235000011114 ammonium hydroxide Nutrition 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000005485 electric heating Methods 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 230000001502 supplementing effect Effects 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 238000005338 heat storage Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
Abstract
The invention aims to provide a distributed multi-source energy supply integrated system based on a zero-carbon internal combustion engine, which comprises a zero-carbon fuel engine (6), a heat-electricity combined supply system (7) and a multi-source reversible thermal management system (15), wherein the zero-carbon fuel engine (6) is connected with the heat-electricity combined supply system (7) through an exhaust pipe, the zero-carbon fuel engine (6) is connected with a fuel supply storage device (1) through a hydrogen transmission pipe, and the multi-source reversible thermal management system (15) is connected with the fuel supply storage device (1) through an ammonia supply pipeline (16). The invention realizes the efficient coupling of the zero-carbon engine system and the thermal management system, fully utilizes the engine smoke and the waste heat energy, and improves the energy utilization efficiency by coupling the Rankine cycle and the thermal management system. The system zero-carbon fuel engine uses ammonia as main fuel, uses ammonia-containing fuel as working medium to perform energy management, and uses ammonia as a reducing agent of a post-treatment system, so that system terminal integration is realized, and no carbonization of system emission is ensured.
Description
Technical Field
The invention relates to an energy supply system, in particular to an energy supply system based on a zero-carbon internal combustion engine.
Background
The goal is that only solving emissions problems from the source of the fuel is a viable technical path. The power system is widely applied to production and living, and is distributed in transportation industry and off-road power industry, such as power stations, distributed energy supply and the like. Ammonia is considered an ideal fuel, and therefore ammonia-fueled energy power systems are also one of the advanced core technologies for achieving near zero emission goals for power systems. Aiming at the problems of high ignition point, low heat value, low flame propagation speed and the like of the ammonia fuel, the ammonia fuel engine has low volume efficiency and poor combustion effect, and the performance of the ammonia engine is limited. The existing internal combustion engine distributed power system has the problems of low energy supply efficiency, poor emission, large system volume and the like. In order to realize stable and reliable operation of the zero-carbon distributed energy supply system, the distributed energy supply system of the high-power zero-carbon internal combustion engine is researched by considering the trend of equipment economy and high-power requirements, the zero-carbon energy storage fuel is further developed, the comprehensive energy utilization efficiency is improved, and the method has important significance for realizing zero-carbon emission.
Unlike the traditional internal combustion engine type distributed energy supply system driven by a diesel engine, the distributed multi-source energy supply integrated system based on the high-power zero-carbon internal combustion engine uses the zero-carbon internal combustion engine as a power core, and the exhaust substances are treated through the aftertreatment system while the zero-carbon emission of the system is realized.
Disclosure of Invention
The invention aims to provide a distributed multi-source energy supply integrated system based on a zero-carbon internal combustion engine, which solves the problems of the traditional distributed energy system and meets the needs of the future energy system.
The purpose of the invention is realized in the following way:
the invention relates to a distributed multi-source energy supply integrated system based on a zero-carbon internal combustion engine, which is characterized in that: the system comprises a zero-carbon fuel engine (6), a heat-electricity combined supply system (7) and a multi-source reversible thermal management system (15), wherein the zero-carbon fuel engine (6) is connected with the heat-electricity combined supply system (7) through an exhaust pipe, the zero-carbon fuel engine (6) is connected with a fuel supply storage device (1) through a hydrogen transmission pipe, and the multi-source reversible thermal management system (15) is connected with the fuel supply storage device (1) through an ammonia supply pipeline (16).
The invention may further include:
1. The zero-carbon fuel engine (6) comprises an ammonia fuel common rail pipe (20), an ammonia cracker (4) and an engine active pre-combustion chamber (19), wherein an ammonia fuel storage tank (1) is connected with the ammonia cracker (4) and the ammonia fuel common rail pipe (20) through an ammonia fuel supply pump (17), the cracker (4) is connected with the engine active pre-combustion chamber (19), and an ammonia fuel injector is connected with a cylinder of the zero-carbon fuel engine (6).
2. The combined heat and power system (7) comprises an evaporator (27), a water storage tower (34), a steam turbine (30), a motor (31) and a condenser (32), wherein the evaporator (27) is respectively connected with a low-temperature tail gas pipeline (28) and an exhaust pipe (21) of the zero-carbon fuel engine (6) on one hand, a circulating pipeline is formed by the evaporator and the steam turbine (30) on the other hand, the steam turbine (30) is connected with the motor (31), a water pump (33) is arranged on the circulating pipeline, and the circulating pipeline is also connected with the water storage tower (34).
3. The multi-source reversible thermal management system (15) comprises an absorption heat pump unit (35) and a vapor compression heat pump unit (41);
The absorption heat pump unit (35) comprises a first heat exchanger (23), a second heat exchanger (32), a third heat exchanger (55), a fourth heat exchanger (56) and a fifth heat exchanger (58), an ammonia working medium enters the internal heat exchanger (55) through a three-way valve (37), a buffer tank (36) and a switch valve (53), enters the second heat exchanger (32) through the fourth heat exchanger (56), an expansion valve (57) and the fifth heat exchanger (58), the working medium absorbs heat in the Rankine cycle at the second heat exchanger (32) and circulates through an ammonia fuel supply pump (52), the working medium in the water tank (11) enters the first heat exchanger (23) after being preheated through a pipeline (10) after being absorbed by waste heat in the Rankine cycle, absorbs heat of oil cooling at an ammonia engine cylinder, and then enters the second heat exchanger (32) and the first heat exchanger (23) through the electromagnetic expansion valve (60) after being brought into the third heat exchanger (55) through the first heat exchanger (23) to complete circulation;
The vapor compression heat pump unit (41) comprises a sixth radiator (64), a seventh radiator (67), an eighth radiator (68) and a ninth radiator (71), ammonia working medium enters the circulation from the three-way valve (62) through the three-way valve (37) and the ammonia fuel supply pump (38), enters the ninth heat exchanger (71) for heat exchange after being compressed by the high-power compression pump (61), expands at the expansion valve (63) through the three-way valve (70), enters the sixth heat exchanger (64) and then enters the high-power compression pump (61) to complete the circulation, and the other circulation is to dissipate heat at the seventh heat exchanger (67) after entering the low-pressure pump (66) through the sixth heat exchanger (64) for compression, and enters the eighth heat exchanger (68) for flowing back to the sixth heat exchanger (64) through the three-way valve (69) and the expansion valve (65) to complete the circulation.
The invention has the advantages that:
1. The invention realizes the efficient coupling of the zero-carbon engine system and the thermal management system, fully utilizes the engine smoke and the waste heat energy, and improves the energy utilization efficiency by coupling the Rankine cycle and the thermal management system.
2. The invention designs a multi-source reversible heat management system, and a compound multi-stage heat pump design, and a double-source heat supply operation mechanism widens the working area and improves the stability and reliability of energy supply of the system; in addition, the composite heat pump and the combined heat and power system realize double-source energy supply, so that the electric energy of a thermoelectric system can be avoided from entering a network, and the system efficiency is improved to a certain extent;
3. According to the invention, through the design of the secondary circuit, the safety problem caused by leakage of ammonia fuel working medium is avoided, the terminal energy supply is unified, the primary energy consumption is reduced by cooperation with the multi-source reversible heat management system, and the low-grade energy is fully utilized;
4. the multisource reversible heat management system takes ammonia-containing fuel as a working medium, integrates absorption type circulation and compression type circulation, integrates the multisource heat management system, and solves the problem of low volume efficiency of distributed energy sources;
5. The system zero-carbon fuel engine uses ammonia as main fuel, uses ammonia-containing fuel as working medium to perform energy management, and uses ammonia as a reducing agent of a post-treatment system, so that system terminal integration is realized, and no carbonization of system emission is ensured.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic diagram of a precombustion zero carbon fuel engine unit;
FIG. 3 is a schematic diagram of a thermal-electrical energy supply system;
FIG. 4 is a schematic diagram of a multi-source reversible thermal management system;
FIG. 5 is a schematic diagram of an absorption heat pump unit;
Fig. 6 is a schematic diagram of a vapor compression heat pump unit.
Detailed Description
The invention is described in more detail below, by way of example, with reference to the accompanying drawings:
With reference to fig. 1-6, fig. 1 is a schematic diagram of an overall structure of the present invention, and a distributed multi-source energy supply integrated system based on a zero-carbon internal combustion engine, including a zero-carbon fuel engine, a fuel supply storage system, a multi-source reversible thermal management system, a thermo-electric energy supply system, an aftertreatment device, a battery, and a plurality of energy supply pipelines. The system comprises a zero carbon fuel engine, in this example a precombustion ammonia hydrogen fuel engine 6, an ammonia cracker 4, a fuel supply storage device 1, a multi-source reversible thermal management system 15, a thermo-electric energy supply system 7, ammonia supply lines 2,3, 16, a hydrogen line 5, an SCR aftertreatment device 9, a water tank 11, a converter 13, a battery or an electrical grid 14. The waste gas generated by the precombustion ammonia hydrogen fuel engine 6 is subjected to power generation and heat storage through Rankine cycle, and is discharged after being subjected to tail gas treatment through the SCR device 9. The waste heat in the cooling oil loop of the precombustion type ammonia hydrogen fuel engine 6 and the Rankine cycle 7 enters the reversible thermal management system 15, and the energy of each level is fully utilized through the integration of power generation, energy storage and heat supply, so that the zero carbon emission of the power system and the high-efficiency utilization of the energy are realized.
Fig. 2 is a schematic diagram of the structure of the pre-combustion ammonia-hydrogen fuel engine 6, which includes an ammonia fuel supply pump 17, an ammonia fuel common rail pipe 20, an ammonia fuel injector 18, an intake valve 26, an intake pipe 25, an exhaust pipe 21, a pre-combustion chamber 19, a crankshaft 22, a generator 24, and a heat exchanger 23.
Fig. 3 is a schematic structural diagram of the heat-electricity energy supply system 7, which includes a high-temperature tail gas pipeline 21, a low-temperature tail gas pipeline 28, an evaporator 27, an evaporator outlet pipeline 29, a steam turbine 30, a motor 31, a condenser 32, a water pump 33 and a water storage tower 34.
Fig. 4 is a schematic structural diagram of a multi-source reversible thermal management system 15, which includes an absorption heat pump unit 35, a vapor compression heat pump unit 41, an ammonia inlet pipeline 16, an ammonia supply pump 40, an ammonia storage tank 39, a three-way valve 37, an ammonia supply pump 38, a buffer tank 36, an absorption heat pump unit 35, a vapor compression heat pump two-circuit pipeline 51, an absorption heat pump two-circuit pipeline 46, heat exchangers 48, 45, and self-circulation pumps 44, 47, 50.
Fig. 5 is a schematic diagram of the absorption heat pump unit 35, which includes a waste heat exchanger 23, a waste heat exchanger 32, an internal heat exchanger 55, an ammonia fuel on-off valve 53, an ammonia fuel inlet pipe 54, an ammonia pump 52, a throttle valve 57, an internal heat exchanger 58, an internal heat exchanger 56, and an electromagnetic expansion valve 60.
Fig. 6 is a schematic diagram of a vapor compression heat pump unit, which includes a high-power compression pump 61, a low-power compression pump 66, an evaporator 64, condensers 71, 68, a radiator 67, three-way valves 70, 69, 62, and expansion valves 63, 65.
The zero-carbon fuel engine is connected with the heat-electricity combined supply system through an exhaust pipe, the heat-electricity combined supply system is connected with the multi-source reversible heat management system through a heat exchanger and a flue gas pipeline, and finally the heat-electricity combined supply system is connected with the aftertreatment system;
The zero-carbon fuel engine is connected with a fuel supply system through a hydrogen conveying pipe, the ammonia fuel storage tank 1 is connected with the ammonia cracker 4 and an ammonia fuel common rail pipe 20 through an ammonia fuel supply pump 17, the cracker 4 is connected with an engine active type precombustion chamber 19 through a pipeline and an air rail, an ammonia fuel injector injects 18 into a cylinder, fuel is combusted in the cylinder, and a crankshaft 22 outputs power to drive a generator to generate power. The power generation system includes a motor 31, an inverter 13, and a transmission line, and the motor is operated to generate power and then transmitted to a power consumption unit through the transmission line and stored in a storage battery.
The zero-carbon fuel engine comprises a zero-carbon fuel engine, a generator and the like, and has the following functions: the device can provide relatively stable temperature discharge and meet the conditions while stably operating, and the circulation fluctuation is relatively stable under the rated working condition load.
The multi-source reversible thermal management system 15 includes an absorption cycle unit 35 including components such as heat exchangers 45, 48, circulation pumps 44, 47, expansion valves 65, and the like, and a vapor compression cycle unit 41 including an evaporator 64, condensers 71, 68, compressors 61, 66, and a throttling element.
The multi-source reversible heat management system is a composite heat management system taking ammonia-containing working medium as a refrigerant, integrates absorption type circulation and vapor compression type circulation, integrates an absorption type heat pump taking ammonia-water as the refrigerant and a compression type heat pump taking ammonia as the refrigerant through taking the ammonia-containing working medium as the refrigerant, and realizes the single energy supply and stable energy supply effect of a terminal.
The heat pump unit of the multi-source reversible heat management system uses the electric energy generated by the combined heat and power system, so that the relevance between the electric energy generated by the combined heat and power system and a public power grid is avoided, and the dragging effect is avoided.
The multi-source reversible heat management system designs a two-loop to carry out the user-side distribution of heat (cold quantity) so as to ensure the safety accidents caused by the leakage of the working medium containing ammonia fuel.
The combined heat and power system is a combined heat and power system based on the Rankine cycle principle, and comprises a thermodynamic boiler 27, a steam turbine 30, a heat exchanger 32, a circulating pump 33 and the like.
The circulating working medium of the combined heat and power system comprises, but is not limited to, steam, organic working medium and the like, and the circularly generated electric energy is subjected to energy storage treatment and provides energy for energy consumption components of the heat management system of the system, so that the generation and waste of 'garbage energy' are avoided; the generated heat energy is matched with a heat management system to carry out double-source heat supply.
A distributed multi-source energy supply system based on a zero-carbon internal combustion engine is provided with a power supply mode and a heat supply (cold) mode, and no operation limiting effect exists between the two modes.
When the electric energy supply mode is performed, if the generated energy is greater than the energy supply requirement, the generated energy is stored in energy storage equipment such as a battery through the inverter 13; if the power consumption requirement of the day is increased suddenly, the power supply is insufficient to meet the power consumption requirement, and the energy storage device is used for supplying power in a supplementing mode. Meanwhile, the combined heat and power system works together with the zero-carbon generator set, and in the working process, the turbine 30 drives the generator 31 to generate electric energy for storage, so that on one hand, the energy can be supplied to the compressors in the multi-source thermal management system, and the energy waste is avoided. When the generated energy of the zero-carbon generator meets the use requirement of a user, the electric energy generated by the combined heat and power supply system can be stored through the storage battery 14 besides the electric energy used for the heat management system; if the use requirement of the user is not met, the energy stored by the combined heat and power system can be used as extra electric energy to supplement.
When the heat (cold) supply mode is carried out, the demand of the environmental heat load is judged, the system adopts a multi-source heat management system to supply, the cogeneration system and an absorption heat pump unit in the multi-source heat management system work cooperatively to carry out double-source heat supply, and when the absorption heat pump mode meets the heat (refrigeration) supply demand of a user, namely, the heat (cold) supply is larger than the demand, the full-load work is realized. When the absorption heat pump mode does not meet the heat supply (refrigeration) requirement of a user, namely, the heat (cold) supply is smaller than the requirement, the vapor compression heat pump is additionally used for wide-temperature-range multi-stage energy supply on the basis of the absorption heat pump mode.
In the example, the zero-carbon fuel engine of the system adopts hydrogen pre-injection combustion, the combustion mode of flame pilot ammonia fuel realizes zero-carbon operation of the power system, and the working process of the whole system is as follows:
The ammonia fuel is stored in a storage tank 1 at high pressure and low temperature, part of the ammonia fuel enters an ammonia cracker 4 through an inlet pipeline 2 of the ammonia cracker, an electric heating device is arranged in the cracker, but the electric heating device is not limited to a form, ammonia is cracked into hydrogen, nitrogen and unreacted complete ammonia in the ammonia cracker, the obtained mixed gas containing the hydrogen is introduced into an engine active precombustor 19, the obtained mixed gas is ignited by a spark plug in the precombustor, and the obtained flame ignites the ammonia fuel in a cylinder, so that the efficient combustion of the ammonia fuel is realized. As main fuel of the engine, one path of ammonia fuel is pressurized by the high-pressure pump 17 through the pipeline 3, enters the common rail pipe 20, is injected into the cylinder through the ammonia fuel injector 18, is combusted in the cylinder, and performs work through the movable crankshaft 22. After entering the air cylinder through the electronic throttle valve 26 to participate in combustion reaction, the waste gas enters the heat exchanger 27 through the exhaust pipe 21 to exchange heat, the low-temperature waste gas enters the post-treatment device 8 through the pipeline 28, and the unburned ammonia and nitrogen oxides in the waste gas can be discharged into the atmosphere after being treated in the post-treatment device.
The system is mainly powered in two modes, one is that a motor 24 is connected with a crankshaft 22 through a power output end of a zero-carbon fuel engine, the engine operates to drive the motor to generate electricity, and the generated electric energy is relatively stable and is supplied to an electric energy user or an upper power grid; on the other hand, the electric energy generated by the combined heat and power system is a waste heat utilization system based on Rankine cycle, the working medium is evaporated by the heat exchanger 27 and then enters the steam turbine 30 from the pipeline 29, the high-temperature working medium from the steam turbine is changed into low-temperature working medium by the heat exchanger 32, and the low-temperature working medium enters the heat exchanger 27 from the same circulating pump 33 to complete the Rankine cycle. The turbine drives the generator 31 to generate electricity, and converts the heat energy into electric energy to be stored in the battery through the inverter 13.
The ammonia fuel in this example serves as both the fuel for the zero-carbon engine and the raw material for the cracker, as well as the reductant in the aftertreatment device and the working medium in the thermal management system. When the ammonia fuel is used as a reducing agent, the ammonia fuel enters the ammonia storage tank 39 from the ammonia storage tank 1 through the pipeline 16 and the ammonia fuel supply pump 40 for storage, and then enters the after-treatment device to participate in the reduction of nitrogen oxides; when the ammonia fuel is used as working medium of the heat management system, the ammonia fuel exists in the heat management system in two forms of ammonia and an ammonia-water mixture.
The vapor compression heat pump unit in the multi-source reversible heat management system operates by taking ammonia as a working medium, the ammonia working medium entering the vapor compression heat pump enters circulation from a three-way valve 62 through a three-way valve 37 and an ammonia fuel supply pump 38, enters a heat exchanger 71 for heat exchange after being compressed by a high-power compression pump 61, and enters the heat exchanger 64 for entering the high-power compression pump 61 for circulation after being expanded at an expansion valve 63 through a three-way valve 70. The other cycle is completed by compressing the refrigerant in the low-pressure pump 66 through the heat exchanger 64, dissipating the heat at the heat exchanger 67, flowing the refrigerant back to the heat exchanger 64 through the three-way valve 69 and the expansion valve 65 through the heat exchanger 68.
An absorption heat pump unit in the multi-source reversible heat management system operates by taking an ammonia-water mixture as a working medium, the ammonia working medium entering the absorption heat pump enters an internal heat exchanger 55 through a three-way valve 37, a buffer tank 36 and a switching valve 53, enters a heat exchanger 32 through a heat exchanger 56, an expansion valve 57 and a heat exchanger 58, absorbs heat in Rankine cycle at the heat exchanger 32, and then circulates through an ammonia fuel supply pump 52. The working medium in the water tank 11 enters the heat exchanger 32 through the pipeline 10 to absorb the waste heat in the Rankine cycle for preheating, then enters the heat exchanger 23, absorbs the heat from the oil cooling at the position of the ammonia engine cylinder, is brought into the heat exchanger 55 through the heat exchanger 23 by the working medium, and enters the heat exchangers 32 and 23 through the electromagnetic expansion valve 60 to complete the cycle.
The distributed multi-source energy supply integrated system based on the zero-carbon internal combustion engine can adjust the working mode of the system according to the live condition of a user at the user demand end, and therefore the system also relates to conversion and control requirements among various energies. The multi-source energy thermal management system comprises a plurality of working modes, and the following description is provided for different modes and working methods used by different power supply, heating and refrigeration requirements:
Power supply mode: for the electric energy with larger volume required by the user, the zero-carbon internal combustion engine drives the generator to operate to generate electricity, and the electricity is provided for the electric energy user or an upper-layer power grid, and the distributed energy supply is focused in the example. Evaluating the electric energy use condition of a user, determining the generated energy of the generating device and supplying energy, and storing the generated energy in energy storage equipment such as a battery through an inverter 13 if the generated energy is greater than the energy supply requirement; if the power consumption requirement of the day is increased suddenly, the power supply is insufficient to meet the power consumption requirement, and the energy storage device is used for supplying power in a supplementing mode. Meanwhile, the combined heat and power system works together with the zero-carbon generator set, and in the working process, the turbine 30 drives the generator 31 to generate electric energy for storage, so that on one hand, the energy can be supplied to the compressors in the multi-source thermal management system, and the energy waste is avoided. When the generated energy of the zero-carbon generator meets the use requirement of a user, the electric energy generated by the combined heat and power supply system can be stored through the storage battery 14 besides the electric energy used for the heat management system; if the use requirement of the user is not met, the energy stored by the combined heat and power system can be used as extra electric energy to supplement.
Heat (cold) supply mode: for the heat (cold) demand of users, the system adopts a multi-source heat management system to supply, the cogeneration system and an absorption heat pump unit in the multi-source heat management system cooperate to perform double-source heat supply, and when the absorption heat pump mode meets the heat (refrigeration) demand of users, namely, the heat (cold) supply is larger than the demand, the full-load work is realized. When the absorption heat pump mode does not meet the heat supply (refrigeration) requirement of a user, namely, the heat (cold) supply is smaller than the requirement, the vapor compression heat pump is additionally used for wide-temperature-range multi-stage energy supply on the basis of the absorption heat pump mode.
The distributed multi-source energy supply integrated system based on the zero-carbon internal combustion engine adopts ammonia fuel and hydrogen fuel to realize stable and efficient supply. The double-source energy supply and the heat-electricity combined supply system are matched to operate, so that the electric energy of a thermoelectric system can be avoided from entering a network, and the system efficiency is improved to a certain extent. Meanwhile, ammonia is used as a reducing agent of the aftertreatment system and is also used as a working medium of the thermal management system, the integration degree of the system is improved by the ammonia-in-one multipurpose design, the redundancy of the system is reduced, the safety and the reliability of the system are improved, the emission is absorbed by the synergistic effect of the aftertreatment system and the thermal management system, and the energy supply system has the functions of energy conservation and emission reduction while zero carbonization is realized. The energy management system is designed for the multi-source reversible energy heat management system, and the energy management is carried out on the precombustion type ammonia-hydrogen fuel engine, so that the overall heat efficiency of the system is improved, and meanwhile, the double-source heat supply operation working area is widened and the stability and reliability of energy supply of the system are improved through the integration of the absorption type circulation and the compression type circulation. In addition, through the design of the secondary circuit, the safety problem caused by leakage of ammonia fuel working medium is avoided, the terminal energy supply is unified, the primary energy consumption is reduced by cooperation with the multi-source reversible heat management system, and the low-grade energy is fully utilized. The distributed multi-source energy supply integrated system realizes the integration of a multi-source thermal management system, and optimizes the problem of low volume efficiency of distributed energy sources to a certain extent.
Claims (2)
1. Distributed multi-source energy supply integrated system based on zero-carbon internal combustion engine, characterized by: the system comprises a zero-carbon fuel engine (6), a heat-electricity combined supply system (7) and a multi-source reversible thermal management system (15), wherein the zero-carbon fuel engine (6) is connected with the heat-electricity combined supply system (7) through an exhaust pipe, the zero-carbon fuel engine (6) is connected with a fuel supply storage device (1) through a hydrogen transmission pipe, and the multi-source reversible thermal management system (15) is connected with the fuel supply storage device (1) through an ammonia supply pipeline (16);
The combined heat and power system (7) comprises an evaporator (27), a water storage tower (34), a steam turbine (30), a motor (31) and a condenser, wherein the evaporator (27) is respectively connected with a low-temperature tail gas pipeline (28) and an exhaust pipe (21) of the zero-carbon fuel engine (6), a circulating pipeline is formed between the evaporator and the steam turbine (30), the steam turbine (30) is connected with the motor (31), a water pump (33) is arranged on the circulating pipeline, and the circulating pipeline is also connected with the water storage tower (34);
The multi-source reversible thermal management system (15) comprises an absorption heat pump unit (35) and a vapor compression heat pump unit (41);
The absorption heat pump unit (35) comprises a first heat exchanger (23), a second heat exchanger (32), a third heat exchanger (55), a fourth heat exchanger (56) and a fifth heat exchanger (58), an ammonia working medium enters the third heat exchanger (55) through a first three-way valve (37), a buffer tank (36) and a switch valve (53), enters the second heat exchanger (32) through the fourth heat exchanger (56), a first expansion valve (57) and the fifth heat exchanger (58), the working medium absorbs heat in the Rankine cycle at the second heat exchanger (32) and circulates through a second ammonia fuel supply pump (52), the working medium in the water tank (11) enters the first heat exchanger (23) after being preheated through waste heat in the Rankine cycle absorbed by the second heat exchanger (32), absorbs heat of oil cooling at an ammonia engine cylinder, and is brought into the second heat exchanger (32) through the first heat exchanger (23) by the working medium through a second expansion valve (60) to complete circulation;
The vapor compression heat pump unit (41) comprises a sixth heat exchanger (64), a seventh heat exchanger (67), an eighth heat exchanger (68) and a ninth heat exchanger (71), ammonia working medium enters circulation from a second three-way valve (62) through a first three-way valve (37) and a third ammonia fuel supply pump (38), enters the ninth heat exchanger (71) for heat exchange after being compressed by a high-power compression pump (61), expands at a third expansion valve (63) through a third three-way valve (70) to enter the sixth heat exchanger (64) and then enters the high-power compression pump (61) to complete circulation, and the other circulation radiates heat at the seventh heat exchanger (67) after entering a low-pressure pump (66) through the sixth heat exchanger (64), enters the eighth heat exchanger (68) and flows back to the sixth heat exchanger (64) through a fourth three-way valve (69) and a fourth expansion valve (65) to complete circulation.
2. The distributed multi-source energy supply integrated system based on a zero-carbon internal combustion engine of claim 1, wherein: the zero-carbon fuel engine (6) comprises an ammonia fuel common rail pipe (20), an ammonia cracker (4) and an engine active pre-combustion chamber (19), wherein the fuel supply storage device (1) is connected with the ammonia cracker (4) and the ammonia fuel common rail pipe (20) through a first ammonia fuel supply pump (17), the ammonia cracker (4) is connected with the engine active pre-combustion chamber (19), and the ammonia fuel injector is connected with a cylinder of the zero-carbon fuel engine (6).
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107939548A (en) * | 2017-10-17 | 2018-04-20 | 山东大学 | Internal combustion engine UTILIZATION OF VESIDUAL HEAT IN cooling heating and power generation system and its method of work |
| CN113530667A (en) * | 2021-08-16 | 2021-10-22 | 浙江大学 | Zero-carbon-emission combined cooling heating and power system and method based on solar methanol decomposition synthesis cycle |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107939548A (en) * | 2017-10-17 | 2018-04-20 | 山东大学 | Internal combustion engine UTILIZATION OF VESIDUAL HEAT IN cooling heating and power generation system and its method of work |
| CN113530667A (en) * | 2021-08-16 | 2021-10-22 | 浙江大学 | Zero-carbon-emission combined cooling heating and power system and method based on solar methanol decomposition synthesis cycle |
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