Methanol filling ship hybrid propulsion system

Abstract

The utility model discloses a hybrid propulsion system of a methanol filling ship, which comprises three first dual-fuel generators, a second dual-fuel generator, four sets of lithium battery packs, a solar photovoltaic panel, a controller and an electric equipment group, the three first dual-fuel generators and the second dual-fuel generator are arranged in parallel and are electrically connected with the controller respectively; the four sets of lithium battery packs, the solar photovoltaic panel and the plurality of electric equipment are electrically connected with the controller; the electric equipment group comprises a side thrust motor, at least one main propulsion motor, at least one cargo oil pump and at least one marine daily power supply which are electrically connected with the controller respectively; the three first dual-fuel generators and the second dual-fuel generator can adopt methanol as fuel, the power of the first dual-fuel generators is larger than that of the second dual-fuel generator, the mode that diesel oil is adopted as driving fuel in the past is replaced, and the problems that energy consumption is high and environmental protection performance is insufficient in the past are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the water ship technical field especially relates to a kind of methanol filling ship hybrid propulsion system. BACKGROUND

[0002] Methanol as ship fuel is valued for its environmental protection and sustainability. However, the development of methanol fuel filling ships is limited by various factors, including technical challenges such as methanol fuel storage, filling, and transportation. Existing methanol fuel filling ship propulsion systems mostly use traditional mechanical propulsion methods, using diesel as the main fuel to drive the ship's generator set, which has problems such as high energy consumption and insufficient environmental protection performance. SUMMARY

[0003] The technical problem to be solved by the utility model is to provide a methanol filling ship hybrid propulsion system, which improves the propulsion system of the methanol filling ship, so that the methanol filling ship can use dual fuel for propulsion, and can solve the problem of high energy consumption and insufficient environmental protection performance in the past.

[0004] To solve the above technical problems, the utility model discloses a methanol filling ship hybrid propulsion system, which comprises three first dual-fuel generators, one second dual-fuel generator, four sets of lithium battery packs, solar photovoltaic panels, a controller and a group of electrical equipment. The three first dual-fuel generators and the second dual-fuel generator are connected in parallel and electrically connected to the controller. The four sets of lithium battery packs, solar photovoltaic panels and multiple electrical equipment are electrically connected to the controller. The group of electrical equipment includes a side thrust motor, at least one main propulsion motor, at least one cargo oil pump and at least one marine daily power supply, which are electrically connected to the controller. The first dual-fuel generator and the second dual-fuel generator can use methanol as fuel, and the power of the first dual-fuel generator is greater than that of the second dual-fuel generator.

[0005] Among them, the three first dual-fuel generators and the second dual-fuel generator are electrically connected to the controller through AC / DC converter.

[0006] Among them, the four sets of lithium battery packs are electrically connected to the controller through DC / DC converter.

[0007] Among them, the solar photovoltaic panels are electrically connected to the controller through DC / DC converter.

[0008] Among them, the main propulsion motor is provided with two, and the two main propulsion motors are connected in parallel and electrically connected to the controller.

[0009] Among them, the marine daily power supply is provided with two, and the two marine daily power supplies are connected in parallel and electrically connected to the controller through DC / AC converter and isolation transformer.

[0010] Two cargo oil pumps are arranged, and the two cargo oil pumps are electrically connected with the controller through DC / AC converters.

[0011] The side pushing motor is electrically connected with the controller through a DC / AC converter.

[0012] The power of the first dual-fuel generator is 1000kW, and the power of the second dual-fuel generator is 600kW.

[0013] Compared with the prior art, the embodiments of the utility model have the following beneficial effects:

[0014] (1) The energy of the whole ship can be provided by four sets of lithium batteries and solar photovoltaic panels, and under the condition that the battery set is fully charged, the ship can continuously sail at a speed of 8 knots for about 3 hours under full load working condition, and is suitable for low-speed cruising working condition; when entering and leaving the port, the energy of the whole ship is provided by the lithium battery set and the photovoltaic system, and zero emission in the wharf area can be realized; when the ship is at anchor, the energy of the whole ship is provided by the lithium battery set and the solar photovoltaic panel, and under the condition that the battery set is fully charged, the continuous power supply for more than 24 hours can be met; the hybrid propulsion system uses solar energy as the storage energy, which is conducive to environmental protection and reduces the energy consumption of fuel, replaces the previous mode of using diesel as driving fuel, and solves the problems of high energy consumption and insufficient environmental protection performance in the past.

[0015] (2) The methanol filling ship uses the battery as the main power to meet the working condition of low-speed cruising, wharf operation or anchoring power supply, and has the characteristics of low energy consumption and low vibration and noise;

[0016] (3) In the face of long-haul working condition, the energy of the whole ship is provided by four main generator sets, the ship cruises at about 11.5 knots under full load working condition, and the whole ship power supply equipment set is powered, methanol can be used as the main fuel, the sulfide and particulate emission is reduced, compared with the traditional light fuel oil, about 90% of carbon dioxide emission can be reduced by using green methanol fuel, and the emission reduction target is better realized;

[0017] (4) In the hybrid mode, the four main generator sets are in full load operation and the lithium battery set is discharged, and the total output power can reach 4200kW, under the condition that the battery set is fully charged, the ship can continuously sail at a speed of 12.3 knots for about 3 hours under full load working condition, the energy consumption and the peak shaving from the battery are effectively optimized, the unit load rate is optimized, the increase and decrease of the machine under the condition of load fluctuation are avoided, and single or multiple main engine sets can be selected according to the actual working condition, so that various working conditions such as filling can be met, and the S-Hybrid-R hybrid propulsion system is suitable for 8000-ton methanol filling ship. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings described in the following are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0019] Figure 1 Figure 1 is a schematic diagram of a hybrid propulsion system of a methanol bunkering ship. DETAILED DESCRIPTION

[0020] In order to make the person skilled in the art better understand the present application, the following will combine the drawings in the embodiments of the present application to clearly and completely describe the technical scheme in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0021] The terms "first", "second", and the like in the description, claims, and drawings of the present application are used to distinguish different objects, not to describe a particular order. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, device, product, or end including a series of steps or units is not limited to the listed steps or units, but can optionally include steps or units not listed, or can optionally include other steps or units inherent to the process, method, product, or end.

[0022] In this paper, "embodiment" means that the specific features, structures or characteristics described in conjunction with the embodiment can be included in at least one embodiment of the present application. The phrase appears in various places in the specification does not necessarily refer to the same embodiment, nor is it independent or alternative to other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0023] The present application discloses a specific embodiment of a methanol bunkering ship hybrid propulsion system, please see Figure 1 The hybrid propulsion system includes three first dual-fuel generators 21, one second dual-fuel generator 22, four sets of lithium battery groups 3, solar photovoltaic panels 4, a controller 1, and a group of electrical equipment.

[0024] In the embodiment, three first dual-fuel generators 21 and one second dual-fuel generator 22 are connected in parallel and are electrically connected with the controller 1, and the three first dual-fuel generators 21 and the second dual-fuel generator 22 can all serve as the main engine. Specifically, the three first dual-fuel generators 21 and the second dual-fuel generator are all electrically connected with the controller 1 through AC / DC converters. The power of the first dual-fuel generator 21 is greater than that of the second dual-fuel generator, and preferably, the power of the first dual-fuel generator 21 is 1000 kW, and the power of the second dual-fuel generator 22 is 600 kW. The powers of the first dual-fuel generator 21 and the second dual-fuel generator are different, and one or more of the first dual-fuel generators 21 and the second dual-fuel generator can be selected to be started according to the demand to meet the demand of various working conditions. The three first dual-fuel generators 21 and the second dual-fuel generator can use methanol as fuel. Methanol as the main fuel can reduce sulfide and particulate emissions. Compared with traditional light fuel oil, the use of green methanol fuel can reduce about 90% of carbon dioxide emissions, better achieve the emission reduction target, reduce the emissions of methanol filling ships, and improve the environmental protection performance.

[0025] In combination Figure 1 , four sets of lithium battery groups 3, solar photovoltaic panels 4 and multiple electrical equipment are electrically connected with the controller 1, so that the solar photovoltaic panels 4 can charge the lithium battery groups 3 and supply the electrical equipment on the ship. The power of the solar photovoltaic panels 4 can reach 38 kW, the power of the lithium battery groups 3 can reach 636.87 kW, and the total power can reach 2547.48 kW / h. Specifically, the four sets of lithium battery groups 3 are all electrically connected with the controller 1 through DC / DC converters, and the solar photovoltaic panels 4 are all electrically connected with the controller 1 through DC / DC converters. The centralized direct-current bus frequency conversion electric control equipment is connected in parallel to supply power to the electrical equipment on the ship.

[0026] In the embodiment, the electrical equipment group includes a side thruster motor 51, two main propulsion motors 52, two cargo oil pumps 54 and two marine daily power sources 53 which are all electrically connected with the controller 1. Specifically, the two main propulsion motors 52 are connected in parallel and are both electrically connected with the controller 1 through DC / AC converters, and the two marine daily power sources 53 are connected in parallel and are both electrically connected with the controller 1 through DC / AC converters and isolation transformers. The two marine daily power sources 53 are redundant to each other and can provide a 250 kVA daily power source to provide high-quality daily alternating current power for the daily load of the ship. The two cargo oil pumps 54 are both electrically connected with the controller 1 through DC / AC converters, and the side thruster motor 51 is electrically connected with the controller 1 through a DC / AC converter. It should be noted that the number of the side thruster motor 51, the main propulsion motor 52, the cargo oil pump 54 and the marine daily power source 53 can be selectively set according to the demand, and can be three, four, five or the like.

[0027] The methanol bunkering ship hybrid propulsion system of the embodiment can be powered by four sets of lithium batteries 3 and solar photovoltaic panels 4. In the full-load working condition, the ship can continuously sail at a speed of 8 knots for about 3 hours when the batteries are fully charged, which is suitable for low-speed cruising conditions. When entering and leaving the port, the ship's energy is provided by lithium batteries 3 and photovoltaic systems, which can achieve zero emissions in the terminal area. When the ship is at anchor, the ship's energy is provided by lithium batteries 3 and solar photovoltaic panels 4, which can provide continuous power for more than 24 hours when the batteries are fully charged. The hybrid propulsion system uses solar energy as a storage energy source, which is beneficial to environmental protection and reduces fuel energy consumption. It replaces the previous diesel driving fuel mode and solves the problems of high energy consumption and insufficient environmental protection performance. The methanol bunkering ship uses batteries as the main power source to meet the low-speed cruising, terminal operation or anchoring power conditions, which is green, environmentally friendly and zero emission, and has the characteristics of low energy consumption and low vibration and noise;

[0028] When facing long-haul working conditions, the ship's energy is provided by four main generator sets, and the ship can cruise at a speed of about 11.5 knots in the full-load working condition, and power is supplied to all electrical equipment groups. Methanol can be used as the main fuel to reduce sulfide and particulate emissions. Compared with traditional light fuel oil, the use of green methanol fuel can reduce about 90% of carbon dioxide emissions, better achieving the emission reduction target.

[0029] In the hybrid mode, when facing the maximum speed sailing condition, the four main generator sets are running at full load and the lithium battery group 3 is discharging, and the total output power can reach 4200kW. In the full-load working condition, the ship can continuously sail at a speed of 12.3 knots for about 3 hours when the batteries are fully charged, which effectively optimizes energy consumption and peak shaving from the battery, optimizes unit load rate, avoids increasing and decreasing machines under load fluctuation conditions, and can select single or multiple main engine sets according to the actual working condition. The operation meets various conditions such as bunkering. The hybrid power battery has better dynamic response capability, reduces unit fluctuation, optimizes ship energy efficiency, and when the grid generator set fails, the battery can be used as a safety backup power source to discharge instantaneously to support the ship power grid, ensuring that the ship does not lose power, which is suitable for the S-Hybrid-R hybrid propulsion system of the 8000-ton methanol bunkering ship.

[0030] In the economic speed sailing condition, two main generator sets are running at full load, and the lithium battery group 3 will charge and discharge according to the load and battery system SOC according to the ship energy management system. The ship can cruise at a speed of about 10.5 knots in the full-load working condition.

[0031] In the reverse feeding sailing condition, two main generator sets are running at full load and the lithium battery group 3 is discharging, and the total output power is about 2600kW. Through the energy released by the ship bunkering and receiving conditions, the ship can continuously sail at a speed of 11.5 knots for about 3 hours in the full-load working condition.

[0032] In the working condition of navigation, four main generator sets run at full load, lithium battery group 3 charges, the total output power is about 2900kW, and under the condition of ship full load working speed 11.0 knots, the battery power can be charged from 20% to 80% in 4 hours.

[0033] In the working condition of filling, two main generator sets run at full load, lithium battery group 3 charges, and the transfer power is about 1100kW. While the ship is transferring, the battery power can be charged from 20% to more than 80% in 3 hours.

[0034] In the working condition of receiving, one main generator set runs at full load, lithium battery group 3 charges, and the charging power of lithium battery group 3 is 800kW. While the ship is transferring, the battery power can be charged from 20% to more than 80% in 3 hours.

[0035] Finally, it should be noted that: the methanol filling ship hybrid propulsion system disclosed by the embodiment of the utility model is only the preferred embodiment of the utility model, and is used to explain the technical scheme of the utility model, not to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand; the technical scheme recorded in the foregoing embodiments can still be modified, or some technical features can be replaced; and these modifications or replacements do not make the essence of the corresponding technical scheme deviate from the spirit and scope of the technical scheme of the embodiments of the utility model.

Claims

1. A methanol refueling ship hybrid propulsion system, characterized in that, The system includes three first dual-fuel generators, one second dual-fuel generator, four sets of lithium battery packs, solar photovoltaic panels, a controller, and a group of electrical equipment. The three first dual-fuel generators and one second dual-fuel generator are connected in parallel and electrically connected to the controller. The four sets of lithium battery packs, solar photovoltaic panels, and multiple electrical equipment are all electrically connected to the controller. The group of electrical equipment includes a side thruster motor, at least one main propulsion motor, at least one cargo oil pump, and at least one marine day power supply, all electrically connected to the controller. The three first dual-fuel generators and the second dual-fuel generator can use methanol as fuel, and the power of the first dual-fuel generator is greater than that of the second dual-fuel generator.

2. The methanol bunkering ship hybrid propulsion system according to claim 1, characterized in that, All three first dual-fuel generators and second dual-fuel generators are electrically connected to the controller via an AC / DC converter.

3. A methanol bunkering ship hybrid propulsion system according to claim 1 or 2, characterized in that, All four lithium battery packs are electrically connected to the controller via a DC / DC converter.

4. The methanol refueling ship hybrid propulsion system according to claim 1, characterized in that, The solar photovoltaic panels are all electrically connected to the controller via DC / DC converters.

5. The methanol refueling ship hybrid propulsion system according to claim 1, characterized in that, There are two main propulsion motors, which are connected in parallel and both are electrically connected to the controller.

6. The methanol bunkering ship hybrid propulsion system according to claim 1, characterized in that, The marine daytime power supply is provided in two units, which are connected in parallel and are both electrically connected to the controller through a DC / AC converter and an isolation transformer.

7. The methanol refueling ship hybrid propulsion system according to claim 1, characterized in that, The oil pump is provided in two parts, and both oil pumps are electrically connected to the controller via a DC / AC converter.

8. A methanol bunkering ship hybrid propulsion system according to claim 1, characterized in that, The side-push motor is electrically connected to the controller via a DC / AC converter.

9. A methanol bunkering ship hybrid propulsion system according to claim 1, characterized in that, The first dual-fuel generator has a power of 1000kW, and the second dual-fuel generator has a power of 600kW.

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