CN112324530B - Marine LNG cold energy utilization cold-electricity cogeneration system - Google Patents
Marine LNG cold energy utilization cold-electricity cogeneration system Download PDFInfo
- Publication number
- CN112324530B CN112324530B CN202011202164.4A CN202011202164A CN112324530B CN 112324530 B CN112324530 B CN 112324530B CN 202011202164 A CN202011202164 A CN 202011202164A CN 112324530 B CN112324530 B CN 112324530B
- Authority
- CN
- China
- Prior art keywords
- heat exchanger
- power generation
- cold energy
- working medium
- energy utilization
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000010248 power generation Methods 0.000 claims abstract description 61
- 238000005057 refrigeration Methods 0.000 claims abstract description 33
- 238000004378 air conditioning Methods 0.000 claims abstract description 12
- 238000001816 cooling Methods 0.000 claims description 14
- 239000007789 gas Substances 0.000 claims description 11
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 10
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 8
- 239000011555 saturated liquid Substances 0.000 claims description 6
- 239000000498 cooling water Substances 0.000 claims description 4
- 239000007791 liquid phase Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims 8
- IDGUHHHQCWSQLU-UHFFFAOYSA-N ethanol;hydrate Chemical compound O.CCO IDGUHHHQCWSQLU-UHFFFAOYSA-N 0.000 claims 5
- 238000001704 evaporation Methods 0.000 claims 1
- 230000008020 evaporation Effects 0.000 claims 1
- 239000002912 waste gas Substances 0.000 claims 1
- 239000012530 fluid Substances 0.000 abstract description 50
- 238000003860 storage Methods 0.000 abstract description 23
- 239000002918 waste heat Substances 0.000 abstract description 2
- 239000003949 liquefied natural gas Substances 0.000 description 55
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 16
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 14
- ZSSPATINHRVRTN-UHFFFAOYSA-N 3-fluoro-2-[4-[(2-nitroimidazol-1-yl)methyl]triazol-1-yl]propan-1-ol Chemical compound N1=NN(C(CF)CO)C=C1CN1C([N+]([O-])=O)=NC=C1 ZSSPATINHRVRTN-UHFFFAOYSA-N 0.000 description 10
- 239000007864 aqueous solution Substances 0.000 description 8
- 239000003345 natural gas Substances 0.000 description 7
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonium chloride Substances [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 4
- 239000000446 fuel Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 101100184147 Caenorhabditis elegans mix-1 gene Proteins 0.000 description 2
- 230000003203 everyday effect Effects 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 101100343585 Arabidopsis thaliana LNG1 gene Proteins 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Natural products N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000013433 optimization analysis Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
- F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
- F01K23/06—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle
- F01K23/065—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle the combustion taking place in an internal combustion piston engine, e.g. a diesel engine
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
- F01K25/06—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using mixtures of different fluids
- F01K25/065—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using mixtures of different fluids with an absorption fluid remaining at least partly in the liquid state, e.g. water for ammonia
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
- F01K25/08—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G5/00—Profiting from waste heat of combustion engines, not otherwise provided for
- F02G5/02—Profiting from waste heat of exhaust gases
- F02G5/04—Profiting from waste heat of exhaust gases in combination with other waste heat from combustion engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/06—Apparatus for de-liquefying, e.g. by heating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D19/00—Arrangement or mounting of refrigeration units with respect to devices or objects to be refrigerated, e.g. infrared detectors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0203—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels characterised by the type of gaseous fuel
- F02M21/0215—Mixtures of gaseous fuels; Natural gas; Biogas; Mine gas; Landfill gas
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
本发明公开了一种船用LNG冷能利用冷电联供系统，它包括两级LNG冷能利用发电系统、两级制冷系统、LNG循环泵；LNG经所述LNG循环泵加压后进入第一级LNG冷能利用发电系统进行热量交换；本发明将送入船舶主机的LNG冷能用于船舶发电、船舶低温冷库、高温冷库及空调系统，通过多个工质与LNG进行换热使其达到主机要求的进气温度，并通过各系统工质的组合换热，提高了冷能的综合利用效率。在整合船舶主机余热资源的基础上，较为充分的利用了LNG高品位冷能进行低温发电。可以使有限的LNG冷能得到较为充分的利用，有效降低该船型的运营成本。
The invention discloses a combined cold and power supply system for marine LNG cold energy utilization, which comprises a two-stage LNG cold energy utilization power generation system, a two-stage refrigeration system and an LNG circulating pump; High-grade LNG cold energy utilizes the power generation system for heat exchange; the present invention uses the LNG cold energy sent into the ship's main engine for ship power generation, ship low-temperature cold storage, high-temperature cold storage and air conditioning systems, and exchanges heat with LNG through multiple working fluids to achieve The intake air temperature required by the main engine and the combined heat exchange of the working fluids in each system improve the comprehensive utilization efficiency of cold energy. On the basis of integrating the waste heat resources of the ship's main engine, the high-grade cold energy of LNG is fully utilized for low-temperature power generation. The limited LNG cold energy can be fully utilized, and the operating cost of this ship type can be effectively reduced.
Description
技术领域technical field
本发明涉及船舶技术领域，特别是关于一种LNG燃料动力渔 船的LNG冷能利用冷电联供系统。The invention relates to the technical field of ships, in particular to a combined cooling and power supply system for LNG cold energy utilization of LNG fuel powered fishing boats.
背景技术Background technique
近年来，天然气以其高效、清洁的性能和广泛的用途，将成为一个绿色能源支柱。In recent years, natural gas will become a green energy pillar due to its efficient, clean performance and wide range of uses.
天然气在0.101MPa，-162℃左右时可液化为LNG，经液化后的天然气体积与同质量的天然气的相比，约为后者的1/625。一般而言天然气产地与需求地相距极为遥远，因此进口天然气需解决长途储运存在的问题。而液化天然的运输以海运为主，在兼顾安全的前提下想要以较低成本完成如此巨量的天然气运输则需先将天然气液化。液化后的天然气极大的压缩了体积，大大的方便其运输过程。但以目前的LNG生产工艺，生产一吨LNG的能耗约为850kW·h，在接收终端每吨LNG汽化时所释放的冷量可达240kW·h。因此，合理有效地利用这部分冷能，一方面可以充分的利用LNG的高品位冷能，提高经济效益，另一方面，也可以减少LNG气化过程中的环境污染。Natural gas can be liquefied into LNG at about 0.101MPa and -162°C. The volume of liquefied natural gas is about 1/625 of that of natural gas of the same quality. Generally speaking, the origin of natural gas is very far away from the place of demand, so importing natural gas needs to solve the problems of long-distance storage and transportation. The transportation of liquefied natural gas is mainly by sea. Under the premise of taking into account safety, if you want to complete the transportation of such a huge amount of natural gas at a lower cost, you need to liquefy the natural gas first. The liquefied natural gas greatly compresses the volume, which greatly facilitates its transportation process. However, with the current LNG production process, the energy consumption for producing one ton of LNG is about 850kW·h, and the cooling capacity released when each ton of LNG is vaporized at the receiving terminal can reach 240kW·h. Therefore, rational and effective use of this part of the cold energy can fully utilize the high-grade cold energy of LNG and improve economic benefits on the one hand, and on the other hand, can also reduce the environmental pollution in the LNG gasification process.
目前由于国际海事组织(IMO)的防污染公约对各种有害物质排放要求越来越高，相比燃料油的价格不稳定以及其燃烧排放大量的CO2和SOx等有害物质， LNG市场价格稳定且偏低，此外排放性能较好，对环境较为友好。由于上述原因，更多LNG运输船主要使用甚至是完全使用LNG作为燃料。At present, due to the increasing requirements for the emission of various harmful substances in the International Maritime Organization (IMO) Pollution Prevention Convention, compared with the unstable price of fuel oil and the combustion of a large amount of harmful substances such as CO 2 and SO x , the market price of LNG Stable and low, in addition, the emission performance is good, and it is more environmentally friendly. For the above reasons, more LNG carriers use LNG mainly or even entirely as fuel.
对于完全以LNG为燃料的LNG运输船，由于LNG运输船的功率较大，每天需要消耗近300m3LNG(按照液态体积计算)，除去货舱每天产生的BOG约 100m3(折合成液态体积)，仍存在巨大的冷能可供利用，因此引起了研究人员的广泛关注，但对于小型LNG燃料动力船上的LNG冷能利用，由于可利用的冷量相对较少，未引起足够关注。但因船舶上存在较多需要冷能的场所，例如冷库、空调等，通过利用LNG冷能替代传统制冷循环，可以有效降低船舶的运营成本。For an LNG carrier that uses LNG as fuel, due to the high power of the LNG carrier, it needs to consume nearly 300m 3 of LNG (calculated according to the liquid volume) every day, except that the BOG generated in the cargo tank is about 100m 3 (converted to liquid volume) every day, There is still a huge amount of cold energy available, which has attracted extensive attention of researchers, but the utilization of LNG cold energy on small LNG fuel-powered ships has not attracted enough attention due to the relatively small amount of available cold energy. However, because there are many places on the ship that require cold energy, such as cold storage, air conditioning, etc., by using LNG cold energy to replace the traditional refrigeration cycle, the operating cost of the ship can be effectively reduced.
发明内容SUMMARY OF THE INVENTION
发明目的：针对现有技术存在的问题，本发明的目的是提供一种运行稳定、安全可靠、高效、适用于小型LNG燃料动力船的船用LNG冷能利用冷电联供系统。Purpose of the invention: In view of the problems existing in the prior art, the purpose of the present invention is to provide a combined cooling and power supply system for marine LNG cold energy utilization, which is stable, safe, reliable, efficient and suitable for small LNG fuel powered ships.
技术方案：为实现上述目的，本发明采取的一种船用LNG冷能利用冷电联供系统，包括第一级LNG冷能利用发电系统、第二级LNG冷能利用发电系统、两级制冷系统、LNG循环泵；LNG经所述LNG循环泵加压后进入第一级LNG 冷能利用发电系统进行热量交换；Technical solution: In order to achieve the above purpose, the present invention adopts a combined cold and power supply system for marine LNG cold energy utilization, including a first-level LNG cold energy utilization power generation system, a second-level LNG cold energy utilization power generation system, and a two-stage refrigeration system , LNG circulating pump; LNG is pressurized by the LNG circulating pump and then enters the first-stage LNG cold energy utilization power generation system for heat exchange;
所述第一级LNG冷能利用发电系统包括第一换热器、第二换热器、第一混合器、第二工质泵、第十换热器、第四换热器、第九换热器、第一膨胀机、分离器和在该第一级LNG冷能利用发电系统中循环的第一发电工质，且所述第一换热器、第二换热器、第一混合器、第二工质泵、第十换热器、第四换热器、第九换热器、第一膨胀机、分离器依次通过管道连接构成闭环结构；第一发电工质经第二工质泵加压后，依次经过第十换热器、第四换热器、第九换热器加热为过热蒸汽，并在第一膨胀机中膨胀做功，膨胀后的工质分别进入第一换热器、第二换热器换热，第一发电工质被冷凝为饱和液体后进入下一次循环；The first-stage LNG cold energy utilization power generation system includes a first heat exchanger, a second heat exchanger, a first mixer, a second working fluid pump, a tenth heat exchanger, a fourth heat exchanger, and a ninth heat exchanger. a heat exchanger, a first expander, a separator, and a first power generation working medium circulating in the first-stage LNG cold energy utilization power generation system, and the first heat exchanger, the second heat exchanger, and the first mixer , the second working fluid pump, the tenth heat exchanger, the fourth heat exchanger, the ninth heat exchanger, the first expander, and the separator are sequentially connected by pipelines to form a closed-loop structure; the first power generation working fluid passes through the second working fluid After the pump is pressurized, it is heated into superheated steam through the tenth heat exchanger, the fourth heat exchanger and the ninth heat exchanger in sequence, and is expanded in the first expander to do work, and the expanded working fluid enters the first heat exchange respectively. The heat exchanger and the second heat exchanger exchange heat, and the first power generation working fluid is condensed into a saturated liquid and then enters the next cycle;
所述第二级LNG冷能利用发电系统包括第十换热器、第三工质泵、第三换热器、第四换热器、第八换热器、闪蒸罐、第二膨胀机、第二混合器和在该第二级LNG冷能利用发电系统中循环的第二发电工质，且所述第十换热器、第三工质泵、第三换热器、第四换热器、第八换热器、闪蒸罐、第二膨胀机、第二混合器依次通过管道连接；所述闪蒸罐分别设置有气体输出端和液体输出端，所述气体输出端通过管道与第二膨胀机相连；液体输出端工质与第二膨胀机输出端工质在所述混合器中混合，并与所述第十换热器连接形成闭环结构；所述第三工质泵将与第一级LNG冷能利用发电系统第一发电工质换热后的氨水溶液进行增压，依次进入第三换热器、第四换热器、第八换热器与第一级LNG冷能利用发电系统中循环的第一发电工质、不同质量分数的乙醇水溶液进行热交换；在闪蒸器中闪蒸后，在第二膨胀机中膨胀做功，膨胀后的第二发电工质与分离出的液相混合后，进入第十换热器中被冷凝为饱和液体后进入下一次循环。The second-stage LNG cold energy utilization power generation system includes a tenth heat exchanger, a third working fluid pump, a third heat exchanger, a fourth heat exchanger, an eighth heat exchanger, a flash tank, and a second expander , a second mixer and a second power generation working medium circulating in the second stage LNG cold energy utilization power generation system, and the tenth heat exchanger, the third working medium pump, the third heat exchanger, the fourth heat exchanger The heat exchanger, the eighth heat exchanger, the flash tank, the second expander, and the second mixer are connected in sequence through pipelines; the flash tank is respectively provided with a gas output end and a liquid output end, and the gas output end passes through the pipeline connected with the second expander; the working fluid at the liquid output end and the working fluid at the output end of the second expander are mixed in the mixer and connected with the tenth heat exchanger to form a closed-loop structure; the third working fluid pump The ammonia solution after heat exchange with the first power generation working fluid of the first-stage LNG cold energy utilization power generation system is pressurized, and then enters the third heat exchanger, the fourth heat exchanger, the eighth heat exchanger and the first-stage LNG in sequence. The cold energy utilizes the first power generation working fluid circulating in the power generation system and the ethanol aqueous solutions of different mass fractions for heat exchange; after flashing in the flasher, it expands in the second expander to do work, and the expanded second power generation working fluid and After the separated liquid phase is mixed, it enters the tenth heat exchanger and is condensed into a saturated liquid before entering the next cycle.
优选的，所述第一级LNG冷能利用发电系统中的第一发电工质采用R1150；所述第二级LNG冷能利用发电系统中的第二发电工质采用质量分数为0.86的氨水溶液。Preferably, the first power generation working medium in the first-stage LNG cold energy utilization power generation system adopts R1150; the second power generation working medium in the second-stage LNG cold energy utilization power generation system adopts an ammonia solution with a mass fraction of 0.86 .
优选的，所述第三工质泵将与第一级LNG冷能利用发电系统第一发电工质换热后的氨水溶液进行增压，依次进入第三换热器、第四换热器、第八换热器与第一级LNG冷能利用发电系统中循环的第一发电工质、质量分数为0.6的乙醇水溶液、质量分数为0.4乙醇水溶液进行热交换；所述膨胀后的工质分别以 0.25和0.75的比率进入第一换热器、第二换热器换热。Preferably, the third working fluid pump pressurizes the ammonia solution after heat exchange with the first-stage LNG cold energy using the first power-generating working fluid of the power-generating system, and then enters the third heat exchanger, the fourth heat exchanger, the The eighth heat exchanger and the first-stage LNG cold energy utilize the first power generation working fluid circulating in the power generation system, the ethanol aqueous solution with a mass fraction of 0.6, and the ethanol aqueous solution with a mass fraction of 0.4 for heat exchange; the expanded working fluids are respectively Enter the first heat exchanger and the second heat exchanger at the ratio of 0.25 and 0.75 for heat exchange.
进一步的，所述两级制冷系统包括低温冷库系统以及高温冷库与空调系统串联的制冷系统；所述低温冷库系统包括第四工质泵、第五换热器、第三换热器和在该低温冷库系统循环的第一制冷工质，且所述第四工质泵、第五换热器、第三换热器依次通过管道连接构成闭环结构；所述第三换热器同时经第三工质泵加压后的物流和经第二换热器加热的物流为冷源；所述第五换热器以低温冷库的空气为热源；所述高温冷库与空调系统串联的制冷系统包括第五工质泵、第六换热器、第七换热器、第四换热器和在该制冷系统循环的第二制冷工质，且所述第五工质泵、第六换热器、第七换热器、第四换热器依次通过管道连接构成闭环结构；所述第六换热器以高温冷库的空气为热源；所述第七换热器以室内空气为热源；所述第四换热器同时以经第三换热器加热的两股物流和经第十换热器加热的物流为冷源。Further, the two-stage refrigeration system includes a low-temperature cold storage system and a refrigeration system in which a high-temperature cold storage and an air-conditioning system are connected in series; the low-temperature cold storage system includes a fourth working fluid pump, a fifth heat exchanger, a third heat exchanger and a The first refrigeration working medium circulating in the low-temperature cold storage system, and the fourth working medium pump, the fifth heat exchanger, and the third heat exchanger are sequentially connected by pipes to form a closed-loop structure; the third heat exchanger is simultaneously passed through the third heat exchanger. The flow pressurized by the working fluid pump and the flow heated by the second heat exchanger are the cold sources; the fifth heat exchanger uses the air of the low temperature cold storage as the heat source; the refrigeration system connected in series with the high temperature cold storage and the air conditioning system includes the first heat source. Five working fluid pumps, the sixth heat exchanger, the seventh heat exchanger, the fourth heat exchanger and the second refrigerant circulating in the refrigeration system, and the fifth working fluid pump, the sixth heat exchanger, The seventh heat exchanger and the fourth heat exchanger are sequentially connected by pipes to form a closed-loop structure; the sixth heat exchanger takes the air of the high-temperature cold storage as the heat source; the seventh heat exchanger takes the indoor air as the heat source; The four heat exchangers simultaneously use the two streams heated by the third heat exchanger and the stream heated by the tenth heat exchanger as cold sources.
进一步的，所述第一换热器以经第一工质泵加压后的物流为冷源，所述第二换热器以经第一换热器加热的物流为冷源，所述第十换热器以混合器出口物流为热源，所述第四换热器以经第七换热器加热后的物流为热源，所述第九换热器以发动机冷却水为热源。Further, the first heat exchanger uses the stream pressurized by the first working fluid pump as the cold source, the second heat exchanger uses the stream heated by the first heat exchanger as the cold source, and the second heat exchanger uses the stream heated by the first heat exchanger as the cold source. The tenth heat exchanger takes the flow from the mixer outlet as the heat source, the fourth heat exchanger takes the stream heated by the seventh heat exchanger as the heat source, and the ninth heat exchanger takes the engine cooling water as the heat source.
所述第十换热器以经第二工质泵加压后的物流为冷源；所述第三换热器以经第五换热器加热后的物流为热源；所述第八换热器以主机排放废气为热源。The tenth heat exchanger uses the stream pressurized by the second working fluid pump as the cold source; the third heat exchanger uses the stream heated by the fifth heat exchanger as the heat source; the eighth heat exchanger The device takes the exhaust gas from the main engine as the heat source.
优选的，所述低温冷库系统中的第一制冷工质采用质量分数为0.6的乙醇水溶液；所述两级制冷系统的高温冷库、空调系统中的第二制冷工质采用质量分数为0.4乙醇水溶液。Preferably, the first refrigeration working medium in the low temperature cold storage system adopts an ethanol aqueous solution with a mass fraction of 0.6; the second refrigeration working medium in the high temperature cold storage and air conditioning system of the two-stage refrigeration system adopts an ethanol aqueous solution with a mass fraction of 0.4 .
有益效果：和现有技术相比，本发明具有如下显著效果：1、本发明将送入船舶主机的LNG冷能用于船舶发电、船舶低温冷库、高温冷库及空调系统，通过多个工质与LNG进行换热使其达到主机要求的进气温度，并通过各系统工质的组合换热，提高了冷能和冷
附图说明Description of drawings
图1是本发明实施例的结构示意图。FIG. 1 is a schematic structural diagram of an embodiment of the present invention.
具体实施方式Detailed ways
下面结合附图和具体实施例对本发明进行详细的描述。The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
如图1所示，本发明包括两级LNG冷能利用发电系统、两级制冷系统、 LNG循环泵；LNG经LNG循环泵加压后进入第一级LNG冷能利用发电系统进行热量交换。As shown in Figure 1, the present invention includes a two-stage LNG cold energy utilization power generation system, a two-stage refrigeration system, and an LNG circulating pump; LNG is pressurized by the LNG circulating pump and enters the first-stage LNG cold energy utilization power generation system for heat exchange.
第一级LNG冷能利用发电系统包括第一换热器HX-1、第二换热器HX-2、第二工质泵P-2、第一混合器MIX-1、第十换热器HX-10、第四换热器HX-4、第九换热器HX-9、第一膨胀机K-1、分离器SEP和在该级系统中循环的第一发电工质(R1150)，且所述第一换热器HX-1、第二换热器HX-2、第一混合器 MIX-1、第二工质泵P-2、第十换热器HX-10、第四换热器HX-4、第九换热器 HX-9、第一膨胀机K-1、分离器SEP依次通过管道连接构成闭环结构；第一换热器以经第一工质泵加压后的物流为冷源，第二换热器以经第一换热器加热的物流为冷源，第十换热器以混合器出口物流为热源，第四换热器以经第七换热器加热后的物流为热源，第九换热器以物流W1(发动机冷却水)为热源。将发动机缸套冷却水作为朗肯循环发电系统的主要热源，第一工质泵P-1将自储罐出来的物流LNG1加压至0.65MPa，并通过第一换热器HX-1、第二换热器 HX-2与第一级LNG冷能利用发电系统中循环工质进行热交换。循环工质(R1150)经第二工质泵P-2加压后，由依次经过第十换热器HX-10、第四换热器HX-4、第九换热器HX-9加热为过热蒸汽，并在第一膨胀机K-1中膨胀做功。通过对比优化分析得出，膨胀后的工质分别以0.25和0.75的比率进入第一换热器HX-1、第二换热器HX-2换热，工质被冷凝为饱和液体后进入下一次循环。第二级LNG冷能利用循环发电系统包括第十换热器HX-10、第三工质泵P-3、第三换热器HX-3、第四换热器HX-4、第八换热器HX-8、闪蒸罐V-100、第二膨胀机K-2、第二混合器MIX-2和在该级系统中循环的第二发电工质(质量分数为0.86的氨水溶液)，且第十换热器HX-10、第三工质泵P-3、第三换热器 HX-3、第四换热器HX-4、第八换热器HX-8、闪蒸罐V-100、第二膨胀机K-2、第二混合器MIX-2依次通过管道连接。第十换热器以经第二工质泵加压后的物流为冷源；第三换热器以经第五换热器加热后的物流为热源；第八换热器以物流G1(主机排放废气)为热源。以船舶主机烟气作为第二级LNG冷能利用循环发电系统的主要热源，辅以高、低温冷库和空调系统。第三工质泵P-3将与第一级LNG冷能利用发电系统工质换热后的氨水溶液增压7MPa，依次进入第三换热器HX-3、第四换热器HX-4、第八换热器HX-8与第一级LNG冷能利用发电系统中循环工质、质量分数为0.6的乙醇水溶液、质量分数为0.4的乙醇水溶液、船舶主机废气进行热交换(不同质量分数的乙醇水溶液在第三换热器、第四换热器进行热交换；船舶主机废气在第八换热器进行热交换)。在闪蒸器 V-100中闪蒸后，在第二膨胀机K-2中膨胀做功，膨胀后的工质与分离出的液相(C5-1、C5-2)混合后，进入第十换热器HX-10中被冷凝为饱和液体后进入下一次循环。第十换热器HX-10以物流R1为冷源；第三换热器HX-3以物流 E2为热源；第四换热器HX-4以物流E-3为热源；第八换热器HX-8以物流G1 为热源；闪蒸罐V-100分别设置有气体输出端和液体输出端，气体输出端通过管道与第二膨胀机相连；液体输出端工质与第二膨胀机输出端工质在第二混合器MIX-2中混合，并与第十换热器HX-10连接形成闭环结构。The first-stage LNG cold energy utilization power generation system includes a first heat exchanger HX-1, a second heat exchanger HX-2, a second working fluid pump P-2, a first mixer MIX-1, and a tenth heat exchanger HX-10, the fourth heat exchanger HX-4, the ninth heat exchanger HX-9, the first expander K-1, the separator SEP and the first power generation working fluid (R1150) circulating in the system at this stage, And the first heat exchanger HX-1, the second heat exchanger HX-2, the first mixer MIX-1, the second working fluid pump P-2, the tenth heat exchanger HX-10, the fourth heat exchanger The heat exchanger HX-4, the ninth heat exchanger HX-9, the first expander K-1, and the separator SEP are sequentially connected by pipelines to form a closed-loop structure; The stream is the cold source, the second heat exchanger uses the stream heated by the first heat exchanger as the cold source, the tenth heat exchanger uses the mixer outlet stream as the heat source, and the fourth heat exchanger is heated by the seventh heat exchanger The latter stream is the heat source, and the ninth heat exchanger uses stream W1 (engine cooling water) as the heat source. The engine cylinder liner cooling water is used as the main heat source of the Rankine cycle power generation system. The first working fluid pump P-1 pressurizes the flow LNG1 from the storage tank to 0.65MPa, and passes through the first heat exchanger HX-1, the first working fluid pump P-1 The second heat exchanger HX-2 exchanges heat with the first-stage LNG cold energy using the circulating working fluid in the power generation system. After the circulating working fluid (R1150) is pressurized by the second working fluid pump P-2, it is heated by the tenth heat exchanger HX-10, the fourth heat exchanger HX-4 and the ninth heat exchanger HX-9 in turn. The superheated steam is expanded to do work in the first expander K-1. Through comparison and optimization analysis, it is concluded that the expanded working fluid enters the first heat exchanger HX-1 and the second heat exchanger HX-2 at a ratio of 0.25 and 0.75, respectively, and the working fluid is condensed into a saturated liquid and then enters the lower heat exchanger. one cycle. The second-stage LNG cold energy utilization cycle power generation system includes the tenth heat exchanger HX-10, the third working fluid pump P-3, the third heat exchanger HX-3, the fourth heat exchanger HX-4, the eighth heat exchanger Heater HX-8, flash tank V-100, second expander K-2, second mixer MIX-2 and second power generation working fluid (aqueous ammonia solution with mass fraction of 0.86) circulating in this stage system , and the tenth heat exchanger HX-10, the third working fluid pump P-3, the third heat exchanger HX-3, the fourth heat exchanger HX-4, the eighth heat exchanger HX-8, the flash tank The V-100, the second expander K-2, and the second mixer MIX-2 are sequentially connected through pipes. The tenth heat exchanger uses the stream pressurized by the second working fluid pump as the cold source; the third heat exchanger uses the stream heated by the fifth heat exchanger as the heat source; the eighth heat exchanger uses the stream G1 (main engine). exhaust gas) as a heat source. The ship's main engine flue gas is used as the main heat source of the second-stage LNG cold energy utilization cycle power generation system, supplemented by high and low temperature cold storage and air conditioning systems. The third working fluid pump P-3 pressurizes the ammonia water solution after heat exchange with the working fluid of the first-stage LNG cold energy power generation system by 7MPa, and then enters the third heat exchanger HX-3 and the fourth heat exchanger HX-4 in turn , The eighth heat exchanger HX-8 and the first-stage LNG cold energy use the circulating working fluid in the power generation system, the ethanol aqueous solution with a mass fraction of 0.6, the ethanol aqueous solution with a mass fraction of 0.4, and the ship's main engine exhaust gas for heat exchange (different mass fractions) The ethanol aqueous solution of the third heat exchanger and the fourth heat exchanger conduct heat exchange; the exhaust gas of the ship's main engine conducts heat exchange in the eighth heat exchanger). After flashing in the flasher V-100, the expansion is done in the second expander K-2, and the expanded working fluid is mixed with the separated liquid phase (C5-1, C5-2), and then enters the tenth exchange Heater HX-10 is condensed into saturated liquid and enters the next cycle. The tenth heat exchanger HX-10 uses the stream R1 as the cold source; the third heat exchanger HX-3 uses the stream E2 as the heat source; the fourth heat exchanger HX-4 uses the stream E-3 as the heat source; the eighth heat exchanger HX-8 takes the stream G1 as the heat source; the flash tank V-100 is provided with a gas output end and a liquid output end respectively, and the gas output end is connected with the second expander through a pipeline; the liquid output end working medium and the second expander output end The working fluid is mixed in the second mixer MIX-2 and connected to the tenth heat exchanger HX-10 to form a closed-loop structure.
两级制冷系统可分为低温冷库系统以及高温冷库与空调系统串联的制冷系统；低温冷库系统包括第四工质泵P-4、第五换热器HX-5、第三换热器HX-3 和在该系统循环的第一制冷工质，且第四工质泵P-4、第五换热器HX-5、第三换热器HX-3依次通过管道连接构成闭环结构。第三换热器HX-3同时以物流 C1、LNG4为冷源；第五换热器以低温冷库的空气为热源。The two-stage refrigeration system can be divided into a low-temperature cold storage system and a refrigeration system in which a high-temperature cold storage and an air-conditioning system are connected in series; the low-temperature cold storage system includes the fourth working fluid pump P-4, the fifth heat exchanger HX-5, and the third heat exchanger HX- 3 and the first refrigerant circulating in the system, and the fourth working fluid pump P-4, the fifth heat exchanger HX-5, and the third heat exchanger HX-3 are sequentially connected by pipes to form a closed-loop structure. The third heat exchanger HX-3 uses the streams C1 and LNG4 as the cold source at the same time; the fifth heat exchanger uses the air in the low temperature cold storage as the heat source.
高温冷库与空调系统串联的制冷系统包括第五工质泵P-5、第六换热器 HX-6、第七换热器HX-7、第四换热器HX-4和在该系统循环的第二制冷工质，且第五工质泵P-5、第六换热器HX-6、第七换热器HX-7、第四换热器HX-4依次通过管道连接构成闭环结构。优选的，第六换热器HX-6以高温冷库的空气为热源；第七换热器HX-7以室内空气为热源；第四换热器HX-4同时以物流 C2、LNG5、R2为冷源。The refrigeration system connected in series with the high-temperature cold storage and the air-conditioning system includes the fifth working fluid pump P-5, the sixth heat exchanger HX-6, the seventh heat exchanger HX-7, the fourth heat exchanger HX-4 and the circulation in the system. The second refrigeration working fluid, and the fifth working fluid pump P-5, the sixth heat exchanger HX-6, the seventh heat exchanger HX-7, and the fourth heat exchanger HX-4 are sequentially connected by pipes to form a closed-loop structure . Preferably, the sixth heat exchanger HX-6 uses the air of the high-temperature cold storage as the heat source; the seventh heat exchanger HX-7 uses the indoor air as the heat source; the fourth heat exchanger HX-4 simultaneously uses the streams C2, LNG5 and R2 as the heat source. cold source.
表1优化后的关键节点参数Table 1 Optimized key node parameters
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011202164.4A CN112324530B (en) | 2020-11-02 | 2020-11-02 | Marine LNG cold energy utilization cold-electricity cogeneration system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011202164.4A CN112324530B (en) | 2020-11-02 | 2020-11-02 | Marine LNG cold energy utilization cold-electricity cogeneration system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112324530A CN112324530A (en) | 2021-02-05 |
| CN112324530B true CN112324530B (en) | 2022-07-19 |
Family
ID=74324024
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011202164.4A Active CN112324530B (en) | 2020-11-02 | 2020-11-02 | Marine LNG cold energy utilization cold-electricity cogeneration system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112324530B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202215312U (en) * | 2011-08-15 | 2012-05-09 | 北京天成山泉电子科技有限公司 | LNG cold energy multi-stage recycling system suitable for ship |
| CN206158809U (en) * | 2016-09-19 | 2017-05-10 | 青岛科技大学 | System is used multipurposely to LNG power boat's cold energy |
| CN207006622U (en) * | 2016-11-14 | 2018-02-13 | 青岛远洋船员职业学院 | A kind of cold energy gradient utilization system of LNG cargo ships |
| CN109113824A (en) * | 2018-08-15 | 2019-01-01 | 江苏科技大学 | LNG Power Vessel fuel cold energy method of comprehensive utilization and its system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101027526B (en) * | 2004-09-22 | 2010-12-08 | 弗劳尔科技公司 | Configurations and methods for LPG and power cogeneration |
-
2020
- 2020-11-02 CN CN202011202164.4A patent/CN112324530B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202215312U (en) * | 2011-08-15 | 2012-05-09 | 北京天成山泉电子科技有限公司 | LNG cold energy multi-stage recycling system suitable for ship |
| CN206158809U (en) * | 2016-09-19 | 2017-05-10 | 青岛科技大学 | System is used multipurposely to LNG power boat's cold energy |
| CN207006622U (en) * | 2016-11-14 | 2018-02-13 | 青岛远洋船员职业学院 | A kind of cold energy gradient utilization system of LNG cargo ships |
| CN109113824A (en) * | 2018-08-15 | 2019-01-01 | 江苏科技大学 | LNG Power Vessel fuel cold energy method of comprehensive utilization and its system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112324530A (en) | 2021-02-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102562496B (en) | Middle/low-temperature geothermic efficient thermoelectric coupling combined supply system based on organic Rankine cycle (ORC) | |
| CN102795693B (en) | Seawater desalination system driven by combined solar and wind energy based on LNG cold energy utilization | |
| CN112539091B (en) | A dual-fuel powered ship LNG cold energy cascade comprehensive utilization system and method | |
| CN104354847B (en) | A kind of seawater source heat pump air-conditioning system for ship and control method thereof | |
| CN109268095B (en) | Method and system for comprehensive utilization of LNG fuel cold energy for dual-fuel powered ships | |
| CN103114912B (en) | Cold, heat, water and electricity four-coproduction system combined with freezing method | |
| CN104389648B (en) | A kind of double-source dynamic system and controlling method thereof | |
| CN109826683A (en) | An organic Rankine cycle power generation system that can efficiently utilize low-temperature cold energy | |
| CN204210725U (en) | A kind of efficient seawater source heat pump air-conditioning system for ship | |
| CN105804818A (en) | A CO2 Rankine Cycle System for Cascade Utilization of Waste Heat from Heavy-duty Diesel Engines | |
| CN113864017B (en) | Kalina-organic Rankine combined cycle power generation system utilizing LNG cold energy and geothermal energy | |
| CN112324530B (en) | Marine LNG cold energy utilization cold-electricity cogeneration system | |
| CN102072585B (en) | Refrigerating cycle system driven by liquid nitrogen engine with exhaust residual heat of diesel engine as heat source | |
| Yao et al. | Exergetic design and optimisation of LNG cold energy utilisation system for dual-fuel main engine of a container ship | |
| CN204415698U (en) | LNG Multi-class propagation system on ship | |
| CN110186214B (en) | Waste heat driven multi-mode cooling, heating and power integrated system | |
| CN112523826B (en) | Multi-mode ship main engine waste heat utilization system and operation method | |
| CN111503956A (en) | Comprehensive energy supply system in closed space and working method | |
| CN110685764A (en) | Non-azeotropic working medium two-stage organic flash evaporation circulation system and heat energy recovery method thereof | |
| CN111852598A (en) | Ship waste heat recovery power generation system | |
| CN112648530B (en) | BOG processing system of LNG transport ship | |
| CN115650345B (en) | A ship combined cooling, heating and power system coupled with seawater desalination | |
| CN106288494B (en) | Quadruple heat recovery compact ammonia water refrigerating system | |
| CN215446928U (en) | Heat energy utilization system combining heating, acting and heat exchange | |
| CN114044119A (en) | Ship multi-power-source electric propulsion system utilizing ammonia fuel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |