CN111874201A - Energy storage formula boats and ships are from flowing cooling system - Google Patents
Energy storage formula boats and ships are from flowing cooling system Download PDFInfo
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- CN111874201A CN111874201A CN202010670370.1A CN202010670370A CN111874201A CN 111874201 A CN111874201 A CN 111874201A CN 202010670370 A CN202010670370 A CN 202010670370A CN 111874201 A CN111874201 A CN 111874201A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H21/00—Use of propulsion power plant or units on vessels
- B63H21/38—Apparatus or methods specially adapted for use on marine vessels, for handling power plant or unit liquids, e.g. lubricants, coolants, fuels or the like
- B63H21/383—Apparatus or methods specially adapted for use on marine vessels, for handling power plant or unit liquids, e.g. lubricants, coolants, fuels or the like for handling cooling-water
Abstract
The invention discloses an energy storage type ship self-flowing cooling system, which comprises a seawater cooling subsystem and a power supply and power generation energy storage subsystem; the energy storage subsystem comprises a power supply switch, an energy storage circuit, a frequency converter and a controller; the cooling water pump is provided with an electric state and a power generation state; the energy storage circuit is electrically connected with the output end of the frequency converter; the ship power grid is electrically connected with the cooling water pump through the power supply switch and the frequency converter in sequence; the control end of the controller is electrically connected with the frequency converter and the cooling water pump respectively so as to control the cooling water pump to operate in an electric state or a power generation state and adjust the charging power of the energy storage circuit in the power generation state. According to the energy storage type ship self-flowing cooling system provided by the invention, the rotating speed and the flow of the water pump are directly regulated through the frequency converter in the pump flow state, the power generation and energy storage are realized by utilizing the principle of the water turbine in the self-flowing state, the rotating speed of the cooling water pump is controlled by controlling the charging power, the self-flowing flow is regulated to the required cooling water quantity, and the automatic regulation of the flow of the cooling system is effectively realized.
Description
Technical Field
The invention relates to the field of design of ship cooling systems, in particular to an energy storage type ship self-flow cooling system.
Background
The sea-going system is one of the important systems of ships, and is used for transferring heat generated by operation of ship power systems such as steam power systems and diesel engines and equipment in ships to cooling water and discharging the heat out of the ships. With the gradual development of modern ships towards low energy consumption, economy, comfort and the like. In order to reduce pumping power loss, improve energy efficiency and reduce vibration noise, researchers have proposed a ship self-flow cooling technology, namely, a self-flow generator is arranged at an entrance of an outboard sea-going system, and the flow resistance in the system is overcome by using the oncoming flow pressure of ship navigation, so that the pump-free driving of cooling water in a certain ship speed interval is realized.
When the system is in a self-flowing state, the cooling water pump cuts off the driving energy and rotates along with the cooling water impact. When pump flow is adopted for water supply, the input of driving energy needs to be adjusted to change the rotating speed of the cooling water pump, so that the cooling water flow is matched with the heat exchange requirement. In the interval of the self-flow navigational speed, the self-flow is generally higher than the cooling water amount required by heat exchange, so that the working medium in the ship is easily supercooled. According to the fluid mechanics principle, the flowing resistance of the sea-going system needs to be increased to ensure that the self-flowing flow is equal to the required cooling water amount, and the resistance can be adjusted along with the ship navigation working condition. In the prior art, the self-flowing flow control scheme is that a resistance adjusting device or a self-flowing port adjusting device is added in a sea pipeline. The passive regulating device can only be regulated according to the ship speed and cannot be regulated according to the cooling water temperature, and the active regulating device needs to be additionally provided with other mechanical control structures, so that the overall structure is complex and the reliability is poor.
Disclosure of Invention
In view of the technical defects and application requirements, on the basis of not adding other resistance adjusting devices, the embodiment of the invention provides an energy storage type ship self-flowing cooling system, which can effectively realize automatic adjustment of the flow of the cooling system when a seawater cooling subsystem is in a pump flow state and a self-flowing state.
In order to solve the above problems, the present invention provides an energy storage type ship self-flow cooling system, comprising:
a seawater cooling subsystem and a power supply and power generation energy storage subsystem; the seawater cooling subsystem comprises a cooling water pump;
the power supply and generation energy storage subsystem comprises: the power supply device comprises a power supply switch, an energy storage circuit, a frequency converter and a controller; the cooling water pump is provided with an electric state and a power generation state;
the energy storage circuit is electrically connected with the output end of the frequency converter, and a ship power grid is electrically connected with the cooling water pump sequentially through the power supply switch and the frequency converter; the control end of the controller is electrically connected with the frequency converter and the cooling water pump respectively so as to control the cooling water pump to operate in an electric state or a power generation state, and the charging power of the energy storage circuit is adjusted when the cooling water pump operates in the power generation state.
Further, the frequency converter further includes: a rectifier, a chopper, an inverter and a filter capacitor;
the ship power grid is electrically connected with the cooling water pump sequentially through the power supply switch, the rectifier and the inverter, and the filter capacitor is connected between the rectifier and the inverter in parallel; the chopper and the energy storage circuit are electrically connected, and a circuit formed by connection is connected between the rectifier and the inverter in parallel.
Further, the frequency converter further includes: the first direct current bus and the second direct current bus;
the first end of the rectifier is electrically connected with the first end of the inverter through the first direct current bus, and the second end of the rectifier is electrically connected with the second end of the inverter through the second direct current bus; the filter capacitor is electrically connected to the first direct current bus and the second direct current bus; the chopper is electrically connected with the energy storage circuit, and a circuit formed by connection is connected with the first direct current bus and the second direct current bus in parallel.
Further, the tank circuit includes: a charging switch, a converter and a storage battery;
the chopper, the charging switch, the converter and the storage battery are electrically connected in sequence, and a circuit formed by connection is connected in parallel with the first direct current bus and the second direct current bus.
Further, the chopper is an IGBT chopper, and the converter is a DC/DC converter.
Further, the seawater cooling subsystem comprises: the cooling water inlet, the cooling water pump, the cooler and the cooling water outlet are communicated in sequence; and the ship power grid is electrically connected with the cooling water pump through the frequency converter in sequence.
Further, the seawater cooling subsystem further comprises: an inlet port side valve and an outlet port side valve;
the inlet side valve is installed between the cooling water inlet and the cooling water pump; the outlet side valve is installed between the cooler and the cooling water outlet.
Further, the cooling water pump is an axial flow type cooling water pump or a centrifugal type cooling water pump.
Furthermore, the cooler is a shell-and-tube heat exchanger, cooling water is arranged on the tube side, and working medium to be cooled is arranged on the shell side.
Further, the cooling water pump is an alternating current motor, and the cooling water pump is controlled to operate in an electric state or a power generation state through a power conversion switch inside the cooling water pump.
The energy storage type ship self-flowing cooling system provided by the invention is characterized in that a seawater cooling subsystem and a power supply and power generation energy storage subsystem are arranged, a ship power grid is electrically connected with a cooling water pump sequentially through a power supply switch and a frequency converter, a control end of a controller is electrically connected with the frequency converter and the cooling water pump respectively so as to control the cooling water pump to operate in an electric state or a power generation state, and the charging power of an energy storage circuit is adjusted when the cooling water pump operates in the power generation state. When the seawater cooling subsystem is in a pump flow state, the rotating speed and the flow of the water pump can be directly adjusted through the frequency converter. When the seawater cooling subsystem is in a self-flowing state, the principle of a water turbine can be utilized to generate electricity and store energy, the rotating speed of a cooling water pump is controlled by controlling charging power, the self-flowing flow is adjusted to the required cooling water amount, and the automatic adjustment of the flow of the cooling system is effectively realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an energy storage type ship gravity cooling system provided by an embodiment of the invention;
fig. 2 is a schematic structural diagram of a frequency converter and a tank circuit according to an embodiment of the present invention;
description of reference numerals: 1. a cooling water inlet; 2. an inlet port side valve; 3. a cooling water pump; 4. a frequency converter; 5. a cooler; 6. a controller; 7. a power supply switch; 8. a charging switch; 9. a converter; 10. a storage battery; 11. an outlet port side valve; 12. a cooling water outlet; 41. a rectifier; 42. a first direct current bus; 43. an inverter; 44. a filter capacitor; 45. a chopper; 46. and a second direct current bus.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
According to the working principle of the pumped storage power station, when the water pump turbine unit works in a water pump mode, blades rotate reversely, power is consumed for pumped storage, when the water pump turbine unit works in a water turbine mode, the blades rotate forwards to generate power, the former is consistent with the flow state of an electric cooling water pump, the latter is similar to the self-flow state, and the difference is that the incoming flow direction of the sea-going system is always the same, and the sea-going system is in an idle-load state during self-flow. If the cooling water pump works in the form of a water turbine and the resistance of the sea dredging system is adjusted by the cooling water pump, no additional resistance adjusting device is needed.
Therefore, an embodiment of the present invention provides an energy storage type ship self-flowing cooling system, as shown in fig. 1, the energy storage type ship self-flowing cooling system includes: a seawater cooling subsystem and a power supply and power generation energy storage subsystem.
The seawater cooling subsystem includes a cooling water pump 3. The power supply and generation energy storage subsystem comprises: a power supply switch 7, a frequency converter 4 and a controller 6. The frequency converter 4 comprises an energy storage circuit; the cooling water pump 3 is provided with an electric state and a power generation state; the ship power grid is electrically connected with the cooling water pump 3 through the power supply switch 7 and the frequency converter 4 in sequence; the control end of the controller 6 is electrically connected with the frequency converter 4 and the cooling water pump 3 respectively to control the cooling water pump 3 to operate in an electric state or a power generation state, and adjust the charging power of the energy storage circuit when the cooling water pump 3 operates in the power generation state.
The controller 6 receives the input signal of the ship sensor and is used for controlling the cooling water pump 3 and the frequency converter 4.
The energy storage formula boats and ships self-flowing cooling system concrete operation mode that this embodiment provided does:
in the sailing process of the ship, cooling water flows through a seawater cooling subsystem to take away heat in the ship, and two water supply methods of pump flow and self-flow are adopted. In the self-flowing navigational speed interval, the self-flowing flow can completely meet the requirement of cooling water quantity, and the excessive water quantity causes the supercooling of the working medium in the ship. The required cooling water amount is mainly determined by the sailing working condition, namely the sailing speed and the cooling water temperature, and the self-flowing water amount is determined by the sailing speed. The energy storage type ship self-flowing cooling system provided by the invention enables the actual cooling water flow passing through the sea dredging system to be matched with the water flow required by cooling.
When the ship sails in the pump flow interval, the power supply switch 7 is closed, the energy storage circuit is disconnected, the controller 6 controls the motor of the cooling water pump 3 to be in an electric state, the rotating speed and the torque of the motor are both positive, and electric energy is absorbed from a ship power grid to drive the cooling water pump 3 to rotate so as to obtain the required cooling water flow.
When the ship sails in the self-flowing area, the power supply switch 7 is disconnected, the energy storage circuit is connected, the controller 6 controls the motor of the cooling water pump 3 to be in a power generation state, namely the rotating speed of the motor is positive, the torque is negative, the self-flowing cooling water drives the impeller of the cooling water pump 3 to rotate, so that the impeller is in a water turbine state, the motor of the cooling water pump 3 is driven to generate power, and the energy storage circuit is charged.
The ship control center calculates whether the current cooling water flow meets the cooling requirement or not by monitoring signals such as the temperature and the flow of a ship heat exchange working medium, and transmits a control signal to the controller 6.
When the ship speed is in the pump flow interval, if the cooling water flow is equal to the flow required by heat exchange, the rotating speed of the cooling water pump 3 is unchanged. If the cooling water flow is higher than the flow required by heat exchange, the controller 6 controls the frequency converter 4 to reduce the rotating speed of the motor and the impeller of the cooling water pump 3, so that the cooling water flow is reduced; if the cooling water flow is lower than the flow required by heat exchange, the controller 6 controls the frequency converter 4 to increase the rotating speed of the motor and the impeller of the cooling water pump 3, so that the cooling water flow is increased.
When the ship speed is in the gravity flow interval, if the cooling water flow is equal to the flow required by cooling, the rotating speed of the cooling water pump 3 is unchanged; if the cooling water flow is higher than the flow required by heat exchange, the controller 6 controls the frequency converter 4, the charging power of the energy storage circuit is increased, and the braking torque of the cooling water pump 3 is increased, so that the rotating speed of a water pump impeller is reduced, and the cooling water flow is reduced; if the cooling water flow is lower than the flow required by heat exchange, the controller 6 controls the frequency converter 4, the charging power of the energy storage circuit is reduced, and the braking torque of the cooling water pump 3 is reduced, so that the rotating speed of a water pump impeller is increased, and the cooling water flow is increased.
According to the energy storage type ship self-flowing cooling system provided by the embodiment of the invention, the seawater cooling subsystem and the power supply and power generation energy storage subsystem are arranged, a ship power grid is electrically connected with the cooling water pump sequentially through the power supply switch and the frequency converter, the control end of the controller is electrically connected with the frequency converter and the cooling water pump respectively so as to control the cooling water pump to operate in an electric state or a power generation state, and the charging power of the energy storage circuit is adjusted when the cooling water pump operates in the power generation state. When the seawater cooling subsystem is in a pump flow state, the rotating speed and the flow of the water pump can be directly adjusted through the frequency converter. When the seawater cooling subsystem is in a self-flowing state, the principle of a water turbine can be utilized to generate electricity and store energy, the rotating speed of a cooling water pump is controlled by controlling charging power, the self-flowing flow is adjusted to the required cooling water amount, and the automatic adjustment of the flow of the cooling system is effectively realized.
Based on the above embodiments, in another embodiment provided by the present invention, as shown in fig. 1 and fig. 2, the frequency converter 4 preferably adopts a voltage source type frequency converter, and its harmonic is smaller than that of a current source type frequency converter, and includes: a rectifier 41, a chopper 45, an inverter 43, and a filter capacitor 44; the ship power grid is electrically connected with the cooling water pump 3 sequentially through the power supply switch 7, the rectifier 41 and the inverter 43, and the filter capacitor 44 is connected between the rectifier 41 and the inverter 43 in parallel; the chopper 45 is electrically connected to the tank circuit, and the circuit formed by the connection is connected in parallel between the rectifier 41 and the inverter 43. The rectifier 41 is used to rectify the ship grid ac into dc. The inverter 43 is used to invert the direct current into alternating current of which both the voltage and the frequency are adjustable. The filter capacitor 44 is used for filtering to obtain a direct current with a flat waveform.
Wherein, converter 4 still includes: a first dc bus 42 and a second dc bus 46; a first end of the rectifier 41 is electrically connected with a first end of the inverter 43 through a first direct current bus 42, and a second end of the rectifier 41 is electrically connected with a second end of the inverter 43 through a second direct current bus 46; the two ends of the filter capacitor 44 are electrically connected to the first dc bus 42 and the second dc bus 46; the chopper 45 is electrically connected to the tank circuit, and the circuit formed by the connection is connected in parallel to the first dc bus 42 and the second dc bus 46.
The motor of the cooling water pump 3 can be an alternating current motor, so that the cooling water pump 3 is controlled to operate in an electric state or a power generation state through a power conversion switch in the cooling water pump 3.
Wherein, the tank circuit includes: a charging switch 8, a converter 9, and a secondary battery 10; the chopper 45 may be an IGBT (Insulated Gate Bipolar Transistor) chopper. The converter 9 may be a DC/DC converter. The chopper 45, the charging switch 8, the converter 9, and the battery 10 are electrically connected in this order, and a circuit formed by the connection is connected in parallel to the first dc bus 42 and the second dc bus 46.
And after receiving the input signal of the ship sensor, the controller 6 controls the cooling water pump 3 and the frequency converter 4. Firstly, the power change-over switch in the motor of the cooling water pump 3 is controlled, secondly, the output frequency and the voltage of the inverter 43 are controlled, and thirdly, the conduction ratio of the chopper 45 is controlled.
In the working process, the frequency converter 4 is connected with a ship power grid through the power supply switch 7, firstly, ship high-voltage alternating current is rectified into direct current through the rectifier 41, the direct current with a flat waveform is obtained through filtering of the filter capacitor 44, then, the direct current is connected to the inverter 43 through the direct current bus, and the direct current is inverted into alternating current with adjustable frequency and voltage, so that frequency and voltage adjustment of power supply of the cooling water pump 3 are achieved. The energy storage circuit connected in parallel between the first dc bus 42 and the second dc bus 46 is connected between the converter 9 and the battery 10 via the chopper 45, and the dc bus charges the battery 10 when the charging switch 8 is closed and the chopper 45 is turned on.
In this embodiment, the seawater cooling subsystem includes: a cooling water inlet 1, a cooling water pump 3, a cooler 5 and a cooling water outlet 12 which are communicated in sequence. The ship power grid is electrically connected with the cooling water pump 3 through the frequency converter 4 in sequence. Seawater enters the seawater cooling subsystem through a cooling water inlet 1, passes through a cooling water pump 3 and a cooler 5 in sequence, and is discharged from a cooling water outlet 12.
The cooling water pump 3 can work in the full working condition range of the ship, under the pump flow working condition, the cooling water pump 3 works in an electric state, the alternating current frequency is changed through the frequency converter 4, and the stepless speed regulation is carried out on the motor and the impeller of the cooling water pump 3. Under the working condition of gravity flow, the cooling water pump 3 works in a power generation state, the charging power is controlled by changing the conduction ratio of the chopper 45, the rotating speed of the motor of the cooling water pump 3 is further controlled, and the gravity flow is adjusted.
The cooling water pump 3 is an axial flow type cooling water pump or a centrifugal type cooling water pump, and the axial flow type cooling water pump is preferentially adopted, so that the system is suitable for the use environment of a seawater cooling subsystem with high flow rate and low lift. The cooler 5 is a shell-and-tube heat exchanger, the tube side is cooling water, and the shell side is a working medium to be cooled, such as steam, lubricating oil, fresh water and the like.
To avoid undesirable consequences in the event of a leak in the seawater cooling subsystem, inlet and outlet side valves 2, 11 are provided in the subsystem. The inlet side valve 2 is installed between the cooling water inlet 1 and the cooling water pump 3. The outlet side valve 11 is installed between the cooler 5 and the cooling water outlet 12.
The energy storage formula boats and ships self-flowing cooling system concrete operation mode that this embodiment provided does:
in the sailing process of the ship, cooling water flows through a seawater cooling subsystem to take away heat in the ship, and two water supply methods of pump flow and self-flow are adopted. In the self-flowing navigational speed interval, the self-flowing flow can completely meet the requirement of cooling water quantity, and the excessive water quantity causes the supercooling of the working medium in the ship. The required cooling water amount is mainly determined by the sailing working condition, namely the sailing speed and the cooling water temperature, and the self-flowing water amount is determined by the sailing speed. The energy storage type ship self-flow cooling system provided by the invention enables the actual cooling water flow passing through the seawater cooling subsystem to be matched with the cooling water flow direction.
When the ship sails in the pump flow interval, the power supply switch 7 is closed, the charging switch 8 is opened, the controller 6 controls the motor of the cooling water pump 3 to be in an electric state, namely the rotating speed and the torque of the motor are both positive, and electric energy is absorbed from a ship power grid to drive the impeller of the cooling water pump 3 to rotate so as to obtain the required cooling water flow.
When the ship sails in the gravity flow area, the power supply switch 7 is switched off, the charging switch 8 is switched on, the controller 6 controls the motor of the cooling water pump 3 to be in a power generation state, namely the rotating speed of the motor is positive and the torque is negative, the gravity flow cooling water drives the impeller of the cooling water pump 3 to rotate, so that the impeller is in a water turbine state, the motor of the cooling water pump 3 is driven to generate power, the chopper 45 is switched on, the generated voltage meets the charging requirement through the converter 9, and the storage battery 10 is charged.
The ship control center calculates whether the current cooling water flow meets the cooling requirement or not by monitoring signals such as the temperature and the flow of a ship heat exchange working medium, and transmits a control signal to the controller 6.
When the ship speed is in the pump flow interval, if the cooling water flow is equal to the flow required by heat exchange, the rotating speed of the cooling water pump 3 is unchanged; if the cooling water flow is higher than the flow required by heat exchange, the controller 6 controls the output frequency and power of the inverter 43 to be reduced, so that the rotating speed of the motor and the impeller of the cooling water pump 3 is reduced, and the cooling water flow is reduced; if the cooling water flow is lower than the flow required by heat exchange, the controller 6 controls the inverter 43 to increase the output frequency and power, so that the rotating speed of the motor and the impeller of the cooling water pump 3 is increased, and the cooling water flow is increased.
When the ship speed is in the gravity flow interval, if the cooling water flow is equal to the flow required by cooling, the rotating speed of the cooling water pump 3 is unchanged; if the cooling water flow is higher than the flow required by heat exchange, the controller 6 controls the conduction ratio of the chopper 45 to increase, the charging power is increased, and the braking torque of the cooling water pump 3 is increased, so that the rotating speed of the impeller of the water pump is reduced, and the flow of the cooling water is reduced; if the cooling water flow is lower than the flow required by heat exchange, the controller 6 controls the conduction ratio of the chopper 45 to be reduced, the charging power is reduced, and the braking torque of the cooling water pump 3 is reduced, so that the rotating speed of the impeller of the water pump is increased, and the cooling water flow is increased.
In summary, in the energy storage type ship self-flowing cooling system provided in the embodiment of the present invention, by providing the seawater cooling subsystem and the power supply and power generation energy storage subsystem, the ship power grid is electrically connected to the cooling water pump through the power supply switch and the frequency converter in sequence, and the control end of the controller is electrically connected to the frequency converter and the cooling water pump respectively, so as to control the cooling water pump to operate in an electric state or a power generation state, and adjust the charging power of the energy storage circuit when the cooling water pump operates in the power generation state. When the seawater cooling subsystem is in a pump flow state, the rotating speed and the flow of the water pump can be directly adjusted through the frequency converter. When the seawater cooling subsystem is in a self-flowing state, the principle of a water turbine can be utilized to generate electricity and store energy, the rotating speed of a cooling water pump is controlled by controlling charging power, the self-flowing flow is adjusted to the required cooling water amount, and the automatic adjustment of the flow of the cooling system is effectively realized.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the invention, but not to limit it; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. An energy storage ship free-flow cooling system, comprising:
a seawater cooling subsystem and a power supply and power generation energy storage subsystem; the seawater cooling subsystem comprises a cooling water pump;
the power supply and generation energy storage subsystem comprises: the power supply device comprises a power supply switch, an energy storage circuit, a frequency converter and a controller; the cooling water pump is provided with an electric state and a power generation state;
the energy storage circuit is electrically connected with the output end of the frequency converter, and a ship power grid is electrically connected with the cooling water pump sequentially through the power supply switch and the frequency converter; the control end of the controller is electrically connected with the frequency converter and the cooling water pump respectively so as to control the cooling water pump to operate in an electric state or a power generation state, and the charging power of the energy storage circuit is adjusted when the cooling water pump operates in the power generation state.
2. The energy storing marine vessel free-flow cooling system of claim 1, wherein the frequency converter further comprises: a rectifier, a chopper, an inverter and a filter capacitor;
the ship power grid is electrically connected with the cooling water pump sequentially through the power supply switch, the rectifier and the inverter, and the filter capacitor is connected between the rectifier and the inverter in parallel; the chopper and the energy storage circuit are electrically connected, and a circuit formed by connection is connected between the rectifier and the inverter in parallel.
3. The energy storing marine vessel free-flow cooling system of claim 2, wherein the frequency converter further comprises: the first direct current bus and the second direct current bus;
the first end of the rectifier is electrically connected with the first end of the inverter through the first direct current bus, and the second end of the rectifier is electrically connected with the second end of the inverter through the second direct current bus; the filter capacitor is electrically connected to the first direct current bus and the second direct current bus; the chopper is electrically connected with the energy storage circuit, and a circuit formed by connection is connected with the first direct current bus and the second direct current bus in parallel.
4. The energy storing marine vessel free-flow cooling system of claim 3, wherein the energy storage circuit comprises: a charging switch, a converter and a storage battery;
the chopper, the charging switch, the converter and the storage battery are electrically connected in sequence, and a circuit formed by connection is connected in parallel with the first direct current bus and the second direct current bus.
5. The energy storing marine vessel free-flow cooling system of claim 4, wherein the chopper is an IGBT chopper and the converter is a DC/DC converter.
6. The energy storing marine vessel free-flow cooling system of claim 1, wherein the seawater cooling subsystem comprises: the cooling water inlet, the cooling water pump, the cooler and the cooling water outlet are communicated in sequence; and the ship power grid is electrically connected with the cooling water pump through the frequency converter in sequence.
7. The energy storing marine vessel free-flow cooling system of claim 6, wherein the seawater cooling subsystem further comprises: an inlet port side valve and an outlet port side valve;
the inlet side valve is installed between the cooling water inlet and the cooling water pump; the outlet side valve is installed between the cooler and the cooling water outlet.
8. The energy-storing marine vessel free-flow cooling system of claim 6, wherein the cooling water pump is an axial flow cooling water pump or a centrifugal cooling water pump.
9. The energy storage ship free-flow cooling system of claim 6, wherein the cooler is a shell-and-tube heat exchanger, the tube side is cooling water, and the shell side is the working medium to be cooled.
10. The energy-storage ship self-flow cooling system according to any one of claims 1-9, wherein the cooling water pump is an alternating current motor, so that the cooling water pump is controlled to operate in an electric state or a power generation state through a power conversion switch inside the cooling water pump.
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| CN113443113A (en) * | 2021-07-31 | 2021-09-28 | 绍兴市松陵造船有限责任公司 | Ship cooling system with auxiliary propulsion function |
| CN114348224A (en) * | 2022-02-18 | 2022-04-15 | 中国船舶重工集团公司第七一九研究所 | Ship variable frequency pump cooling system and control method thereof |
| CN114750919A (en) * | 2022-04-15 | 2022-07-15 | 中国船舶重工集团公司第七一九研究所 | Method, device and equipment for controlling cooling system of polar ship and storage medium |
| CN114750920A (en) * | 2022-04-15 | 2022-07-15 | 中国船舶重工集团公司第七一九研究所 | Anti-blocking method, device and system for polar region ship sea pipeline and electronic equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113443113A (en) * | 2021-07-31 | 2021-09-28 | 绍兴市松陵造船有限责任公司 | Ship cooling system with auxiliary propulsion function |
| CN114348224A (en) * | 2022-02-18 | 2022-04-15 | 中国船舶重工集团公司第七一九研究所 | Ship variable frequency pump cooling system and control method thereof |
| CN114750919A (en) * | 2022-04-15 | 2022-07-15 | 中国船舶重工集团公司第七一九研究所 | Method, device and equipment for controlling cooling system of polar ship and storage medium |
| CN114750920A (en) * | 2022-04-15 | 2022-07-15 | 中国船舶重工集团公司第七一九研究所 | Anti-blocking method, device and system for polar region ship sea pipeline and electronic equipment |
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Application publication date: 20201103 |