Energy recovery system and ship

Abstract

The invention provides an energy recovery system and a ship. The energy recovery system comprises a fluid conveying pipe set, one end of the fluid conveying pipe set is used for being connected with a ship fluid system, and the other end of the fluid conveying pipe set is used for discharging fluid; the energy recovery assembly is connected to the fluid conveying pipe set, and the energy recovery assembly is used for utilizing kinetic energy of fluid and changing gravitational potential energy to move so as to generate electric energy; and the frequency conversion assembly is electrically connected with the energy recovery assembly and is used for processing and outputting the recovered electric energy. According to the system, kinetic energy and gravitational potential energy of seawater in a ship fluid system are recycled, effective supplementation can be provided for a ship power system, and then the overall energy efficiency of a ship is improved.

Description

Technical Field

[0001] The present invention relates to the field of ship energy recovery, and in particular to an energy recovery system and a ship. Background Art

[0002] At present, in order to reduce the emission of carbon dioxide from ships, there are only two ways to improve the overall energy consumption of ships: "increasing revenue" and "saving energy". Among them, wind-assisted propulsion technology using offshore wind energy and exhaust gas boiler devices using waste heat from ship exhaust gas belong to the former, which essentially increases the energy available to ships; while the latter is mainly manifested in the optimization of the energy consumption of each system, such as the air lubrication system reduces the resistance of the ship during navigation and reduces the energy consumption of the propulsion system. Based on the research on energy recovery, the present invention provides a new energy recovery system. Summary of the invention

[0003] In view of the above-mentioned shortcomings of the related art, the object of the present invention is to provide an energy recovery system and a ship, which are used to recycle and utilize energy and integrate it into the ship's power grid or store it in batteries to supplement the ship's electricity demand and improve energy efficiency.

[0004] To achieve the above-mentioned purpose and other related purposes, the present invention provides an energy recovery system, comprising: a fluid delivery pipe group, one end of which is used to connect to the ship fluid system, and the other end of which is used to discharge the fluid; an energy recovery component, connected to the fluid delivery pipe group, and used to utilize the kinetic energy of the fluid and the changing gravitational potential energy movement to generate electrical energy; a frequency conversion component, electrically connected to the energy recovery component, and used to process the recovered electrical energy and output it to the outside.

[0005] Optionally, the ship fluid system includes a ballast water tank, the fluid delivery pipe group includes a ballast main pipe, an inlet and outlet pipes and a first butterfly valve, both ends of the inlet and outlet pipes are respectively connected to the ballast water tank and the ballast main pipe, the first butterfly valve is connected to the inlet and outlet pipes to control the on-off of the inlet and outlet pipes, and one end of the ballast main pipe for discharging fluid is connected to the energy recovery component and the first butterfly valve in sequence.

[0006] Optionally, the ship fluid system includes a cooler, and the fluid delivery pipe group also includes a seawater main, an inlet pipe, a second butterfly valve, a cooling pump and an outlet pipe, the two ends of the inlet pipe are respectively connected to the seawater main and the cooler, the two ends of the outlet pipe are respectively connected to the cooler and the energy recovery component, and the cooling pump is connected to the inlet pipe for pumping seawater into the cooler.

[0007] Optionally, the energy recovery component includes two water turbines, the two water turbines are respectively connected to the water outlet pipe and the ballast main pipe, and the two water turbines are both electrically connected to the frequency conversion component.

[0008] Optionally, the fluid delivery pipe group also includes a flow meter, a first branch pipe, a second branch pipe, and a first branch pipe valve and a second branch pipe valve respectively connected to the first branch pipe and the second branch pipe, the flow meter is connected to the ballast main pipe, the flow meter is used to detect the flow in the ballast main pipe, the first branch pipe and the second branch pipe are connected in parallel to the ballast main pipe and are located at the liquid outlet end of the flow meter, the turbine is connected to the ballast main pipe by being connected in series to the first branch pipe, when the flow reaches a preset value, the first branch pipe valve on the first branch pipe opens, and when the flow is lower than the preset value, the second branch pipe valve on the second branch pipe opens.

[0009] Optionally, the energy recovery system further includes two third butterfly valves, which are respectively connected to the ballast main pipe and the water outlet pipe and are both located at the liquid outlet end of the corresponding turbine.

[0010] Optionally, the energy recovery system further comprises two check valves, which are respectively connected to the ballast main pipe and the water outlet pipe, and are both located at the liquid inlet end of the corresponding third butterfly valve.

[0011] Optionally, the frequency conversion component includes two frequency converters, the two frequency converters are electrically connected to the two turbines respectively, and the frequency converters are used for rectifying and supplying power to electrical equipment.

[0012] Optionally, the energy recovery component also includes an energy storage component, and the frequency conversion component also includes two first switches and two second switches. The two frequency converters are electrically connected to the energy storage component, and the two first switches are respectively used to control the on-off of the circuit between the two turbines and the corresponding frequency converters, and the two second switches are respectively used to control the on-off of the power supply lines from the two frequency converters to the electrical equipment.

[0013] A ship comprises the energy recovery system as described above.

[0014] As described above, the energy recovery system and ship of the present invention have the following beneficial effects: the system fully utilizes the kinetic energy and gravitational potential energy of seawater in the ship fluid system. By recycling and utilizing this energy, the system can provide effective supplementation for the ship power system, thereby improving the overall energy efficiency of the ship. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Shown is a schematic diagram of an energy recovery system in an embodiment of the present invention.

[0016] Figure 2 It is a schematic diagram showing that the first branch pipe and the second branch pipe are arranged in parallel in an embodiment of the present invention.

[0017] Component number description

[0018] 1. Ballast water tank; 2. Ballast main pipe; 3. Inlet and outlet pipes; 4. First butterfly valve; 5. Cooler; 6. Seawater main pipe; 7. Inlet pipe; 8. Second butterfly valve; 9. Cooling pump; 10. Outlet pipe; 11. Turbine; 12 Flow meter; 13. First branch pipe; 14. Second branch pipe; 15. First branch pipe valve; 16. Second branch pipe valve; 17. Third butterfly valve; 18. Check valve; 19. Frequency converter; 20. Energy storage component; 21. First switch; 22. Second switch. DETAILED DESCRIPTION

[0019] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0020] For example, when describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional view showing the device structure will not be partially enlarged according to the general scale, and the schematic view is only an example, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional space dimensions of length, width and depth should be included.

[0021] For ease of description, spatial relational terms such as "under", "below", "below", "below", "above", "on", etc. may be used herein to describe the relationship of one element or feature shown in the drawings to other elements or features. It will be understood that these spatial relational terms are intended to include other directions of the device in use or operation in addition to the directions depicted in the drawings. In addition, when a layer is referred to as being "between" two layers, it can be the only layer between the two layers, or there can be one or more intervening layers. As used herein, "between..." means including the end point values.

[0022] In the context of the present application, a structure in which a first feature is described as being "above" a second feature may include embodiments in which the first and second features are formed in direct contact, and may also include embodiments in which additional features are formed between the first and second features, such that the first and second features may not be in direct contact.

[0023] It should be noted that the illustrations provided in this embodiment are only used to illustrate the basic concept of the present invention in a schematic manner, and therefore the illustrations only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0024] like Figure 1 As shown, this embodiment provides an energy recovery system for a ship, which is used to recover and utilize the kinetic energy and gravitational potential energy of the fluid when the ship discharges the fluid.

[0025] The energy recovery system includes a fluid delivery pipe group, an energy recovery component and a frequency conversion component. One end of the fluid delivery pipe group is used to connect to the ship's fluid system, and the other end of the fluid delivery pipe group is used to discharge the fluid; the energy recovery component is connected to the fluid delivery pipe group, and the energy recovery component is used to use the kinetic energy of the fluid and the changing gravitational potential energy to generate electrical energy; the frequency conversion component is electrically connected to the energy recovery component, and is used to process the recovered electrical energy and output it to the outside.

[0026] When the system is implemented, the fluid discharged from the ship first flows into the fluid conveying pipe group, and then the fluid flows through the energy recovery component. At this time, the energy recovery component uses the kinetic energy of the fluid flow and the gravitational potential energy that changes during the flow of the fluid and converts them into electrical energy. The electrical energy generated at this time is transmitted to the frequency conversion component, which rectifies the current and transmits it outward for storage or power supply.

[0027] The ship fluid system includes a ballast water system. When a ship is sailing, in order to adapt to various loading conditions and maintain appropriate displacement, draft, trim and heel, the ship can achieve the purpose of maintaining navigation performance through the ballast water system, wherein the ballast water system includes a ballast water tank 1. For example, the fluid delivery pipe group includes a ballast main pipe 2, an inlet and outlet pipe 3 and a first butterfly valve 4, the two ends of the inlet and outlet pipe 3 are respectively connected to the ballast water tank 1 and the ballast main pipe 2, the first butterfly valve 4 is connected to the inlet and outlet pipe 3 to control the opening and closing of the inlet and outlet pipe 3, and one end of the ballast main pipe 2 for discharging fluid is connected to the energy recovery component.

[0028] When the ship needs to reduce the water in the ballast water tank 1 to change the draft of the ship, the fluid in the ballast water system can be used to recover electrical energy. At this time, the first butterfly valve 4 is opened, and the seawater discharged to the outside flows into the ballast main pipe 2 through the inlet and outlet pipes 3, and flows along the ballast main pipe 2 to the energy recovery component. At this time, the energy recovery component converts the kinetic energy and gravitational potential energy of the water flow into electrical energy and transmits it to the frequency conversion component. At the same time, the water flowing through the energy recovery component is discharged outside the ship.

[0029] In addition, the ship fluid system also includes a seawater cooling system, which uses seawater to cool the equipment on the ship. The seawater cooling system includes a cooler 5. For example, the fluid delivery pipe group also includes a seawater main pipe 6, an inlet pipe 7, a second butterfly valve 8, a cooling pump 9 and an outlet pipe 10. The two ends of the inlet pipe 7 are respectively connected to the seawater main pipe 6 and the cooler 5, and the two ends of the outlet pipe 10 are respectively connected to the cooler 5 and the energy recovery component. The cooling pump 9 is connected to the inlet pipe 7 for pumping seawater into the cooler 5.

[0030] When the seawater cooling system is working, the second butterfly valve 8 is in an open state, and the cooling pump 9 pumps the seawater in the seawater main pipe 6 to the water inlet pipe 7. The seawater flows into the cooler 5 through the water inlet pipe 7. After the seawater undergoes heat exchange, it flows out from the water outlet pipe 10 and flows into the energy recovery component. The energy recovery component uses the seawater in the seawater cooling system to recover electrical energy, and the recovered electrical energy is transmitted to the frequency conversion component.

[0031] It is understandable that, according to actual needs, at least one of the ballast water system and the seawater cooling system can be used for energy recovery. In this embodiment, the energy recovery system uses both the ballast water system and the seawater cooling system for energy recovery. The energy recovery system can also use other systems on the ship with fluid exchange for energy recovery, such as an exhaust gas recirculation system or a selective catalytic reduction system.

[0032] The energy recovery component includes two turbines 11, which are respectively connected to the water outlet pipe 10 and the ballast main pipe 2, and are both electrically connected to the frequency conversion component. When seawater flows through the turbines 11, the turbines 11 rotate and generate electrical energy using the kinetic energy and gravitational potential energy of the seawater, and the recovered electrical energy is transmitted to the frequency conversion component.

[0033] The fluid delivery pipe group also includes a flow meter 12, a first branch pipe 13, a second branch pipe 14, and a first branch pipe 13 valve and a second branch pipe 14 valve respectively connected to the first branch pipe 13 and the second branch pipe 14. The first branch pipe 13 valve and the second branch pipe 14 valve can both be solenoid valves. The flow meter 12 is connected to the ballast main pipe 2. The flow meter 12 is used to detect the flow in the ballast main pipe 2. The first branch pipe 13 and the second branch pipe 14 are connected to the ballast main pipe 2 in parallel and are located at the liquid outlet end of the flow meter 12. The turbine 11 is connected to the ballast main pipe 2 by being connected in series to the first branch pipe 13. When the flow reaches a preset value, the first branch pipe 13 valve on the first branch pipe 13 opens. When the flow is lower than the preset value, the second branch pipe 14 valve on the second branch pipe 14 opens.

[0034] Since the operation time of the ship's ballast water system is highly discrete and the flow rate varies greatly, if the flow rate or flow velocity is insufficient during discharge, it often cannot meet the power generation demand. Through such a setting, when the seawater flow rate reaches the requirement, the valve of the first branch pipe 13 is opened and the valve of the second branch pipe 14 is closed. At this time, the seawater flows through the turbine 11 and recovers electrical energy; when the seawater flow rate does not reach the requirement, the valve of the second branch pipe 14 is opened and the valve of the first branch pipe 13 is closed. At this time, the seawater flows from the second branch pipe 14 back into the ballast main pipe 2 and is discharged. This setting is conducive to maintaining the stability of the system voltage, improving the reactive power distribution efficiency and the system power supply quality, and is particularly suitable for marine energy recovery systems without batteries.

[0035] The energy recovery system also includes two third butterfly valves 17, which are respectively connected to the ballast main pipe 2 and the water outlet pipe 10, and are both located at the liquid outlet end of the corresponding turbine 11. The two third butterfly valves 17 are used to control the opening and closing of the ballast main pipe 2 and the water outlet pipe 10.

[0036] The energy recovery system further includes two check valves 18, which are respectively connected to the ballast main pipe 2 and the water outlet pipe 10, and are both located at the liquid inlet end of the corresponding third butterfly valve 17. The check valves 18 are used to prevent the backflow of seawater.

[0037] The frequency conversion component includes two frequency converters 19, which are electrically connected to the two turbines 11 respectively. The frequency converters 19 are used for rectifying and supplying power to electrical equipment.

[0038] The energy recovery component also includes an energy storage component 20, which is a battery. The frequency conversion component also includes two first switches 21 and two second switches 22. The two frequency converters 19 are electrically connected to the energy storage component 20. The two first switches 21 are respectively used to control the on-off of the circuit between the two turbines 11 and the corresponding frequency converters 19, and the two second switches 22 are respectively used to control the on-off of the power supply lines from the two frequency converters 19 to the electrical equipment.

[0039] By setting the energy storage component 20, the recovered electric energy can be temporarily stored in the energy storage component 20. Specifically, the two first switches 21 are in a closed state, and the two second switches 22 are in an open state. When the turbine 11 converts the kinetic energy and gravitational potential energy of the seawater into electric energy, the frequency converter 19 first rectifies the current and then stores the electric energy in the energy storage component 20. When the electric energy is needed, the two second switches 22 are in a closed state, and the two first switches 21 are in an open state. The energy storage component 20 outputs the electric energy to the frequency converter 19 for processing, and then transmits it to the electric equipment, such as the distribution board.

[0040] In summary, the implementation process of this embodiment is as follows: when the seawater in the ballast water tank 1 and the cooler 5 is discharged, the seawater in the ballast water tank 1 flows through the inlet and outlet pipes 3 and the ballast main pipe 2 and then flows to the turbine 11, while the seawater in the cooler 5 flows through the outlet pipe 10 and then flows to the turbine 11. At this time, the two turbines 11 convert the kinetic energy and gravitational potential energy of the seawater into electrical energy, and transmit them to the corresponding frequency converters 19 for rectification processing, and finally store them in the battery. When it is necessary to supply power to the outside, the electrical energy of the energy storage component 20 is transmitted to the frequency converter 19 for processing, and then supplies power to the distribution board.

[0041] This embodiment also discloses a ship including the above energy recovery system. The energy recovered by the energy recovery system is used to supplement the energy of the ship, thereby improving the overall energy efficiency of the ship.

[0042] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. An energy recovery system, characterized in that: include: A fluid delivery pipe assembly, one end of which is used to connect to the ship's fluid system, and the other end of which is used to discharge the fluid; An energy recovery component connected to the fluid delivery pipe assembly, the energy recovery component is used to utilize the kinetic energy of the fluid and the changing gravitational potential energy movement to generate electrical energy; The frequency conversion component is electrically connected to the energy recovery component and is used to process the recovered electric energy and output it externally.

2. The energy recovery system according to claim 1, characterized in that: The ship fluid system includes a ballast water tank, and the fluid delivery pipe group includes a ballast main pipe, an inlet and outlet pipes and a first butterfly valve. Both ends of the inlet and outlet pipes are respectively connected to the ballast water tank and the ballast main pipe. The first butterfly valve is connected to the inlet and outlet pipes to control the opening and closing of the inlet and outlet pipes. One end of the ballast main pipe for discharging fluid is connected to the energy recovery component and the first butterfly valve in sequence.

3. The energy recovery system according to claim 2, characterized in that: The ship fluid system includes a cooler, and the fluid delivery pipe group also includes a seawater main pipe, a water inlet pipe, a second butterfly valve, a cooling pump and a water outlet pipe. The two ends of the water inlet pipe are respectively connected to the seawater main pipe and the cooler, and the two ends of the water outlet pipe are respectively connected to the cooler and the energy recovery component. The cooling pump is connected to the water inlet pipe for pumping seawater into the cooler.

4. The energy recovery system according to claim 3, characterized in that: The energy recovery component includes two water turbines, the two water turbines are respectively connected to the water outlet pipe and the ballast main pipe, and the two water turbines are both electrically connected to the frequency conversion component.

5. The energy recovery system according to claim 4, characterized in that: The fluid delivery pipe group also includes a flow meter, a first branch pipe, a second branch pipe, and a first branch pipe valve and a second branch pipe valve respectively connected to the first branch pipe and the second branch pipe. The flow meter is connected to the ballast main pipe and is used to detect the flow in the ballast main pipe. The first branch pipe and the second branch pipe are connected to the ballast main pipe in parallel and are located at the liquid outlet end of the flow meter. The turbine is connected to the ballast main pipe by being connected in series to the first branch pipe. When the flow reaches a preset value, the first branch pipe valve on the first branch pipe opens, and when the flow is lower than the preset value, the second branch pipe valve on the second branch pipe opens.

6. The energy recovery system according to claim 4, characterized in that: The energy recovery system further comprises two third butterfly valves, which are respectively connected to the ballast main pipe and the water outlet pipe and are both located at the liquid outlet end of the corresponding water turbine.

7. The energy recovery system according to claim 6, characterized in that: The energy recovery system further comprises two check valves, which are respectively connected to the ballast main pipe and the water outlet pipe and are both located at the corresponding liquid inlet end of the third butterfly valve.

8. The energy recovery system according to claim 4, characterized in that: The frequency conversion component includes two frequency converters, the two frequency converters are electrically connected to the two water turbines respectively, and the frequency converters are used for rectifying and supplying power to electrical equipment.

9. The energy recovery system according to claim 8, characterized in that: The energy recovery component also includes an energy storage component, and the frequency conversion component also includes two first switches and two second switches. The two frequency converters are electrically connected to the energy storage component. The two first switches are respectively used to control the on-off of the circuit between the two turbines and the corresponding frequency converters, and the two second switches are respectively used to control the on-off of the power supply lines from the two frequency converters to the electrical equipment.

10. A ship, characterized in that: Comprising an energy recovery system as described in any one of claims 1-9.

Images