CN114572372A - Ship constant-frequency pump cooling system, control method thereof, electronic device and storage medium - Google Patents
Ship constant-frequency pump cooling system, control method thereof, electronic device and storage medium Download PDFInfo
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- CN114572372A CN114572372A CN202210153360.XA CN202210153360A CN114572372A CN 114572372 A CN114572372 A CN 114572372A CN 202210153360 A CN202210153360 A CN 202210153360A CN 114572372 A CN114572372 A CN 114572372A
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- 238000001816 cooling Methods 0.000 title claims abstract description 94
- 238000000034 method Methods 0.000 title claims abstract description 33
- 239000000498 cooling water Substances 0.000 claims abstract description 71
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 238000004590 computer program Methods 0.000 claims description 16
- 230000009467 reduction Effects 0.000 claims description 10
- 238000004134 energy conservation Methods 0.000 abstract description 5
- 230000001276 controlling effect Effects 0.000 description 24
- 238000004891 communication Methods 0.000 description 6
- 239000004576 sand Substances 0.000 description 6
- 239000013535 sea water Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
- F04B49/065—Control using electricity and making use of computers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/20—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by changing the driving speed
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- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Ocean & Marine Engineering (AREA)
- Control Of Non-Positive-Displacement Pumps (AREA)
Abstract
The invention provides a ship fixed-frequency pump cooling system, a control method thereof, electronic equipment and a storage medium, wherein the ship fixed-frequency pump cooling system comprises: a cooling pipeline provided with a water diversion port and a water outlet; the heat exchange equipment is arranged on the cooling pipeline; the fixed-frequency pump and the flowmeter are both arranged in the cooling pipeline and are used for adjusting and detecting the actual flow of the cooling water; and the control subsystem is electrically connected with the fixed-frequency pump and the flowmeter. According to the ship fixed-frequency pump cooling system, the actual flow of cooling water is controlled by the fixed-frequency pump arranged in the cooling pipeline, the flow demand and the actual flow of the cooling water are compared by the control subsystem, and the rotating speed of the fixed-frequency pump is controlled and reduced on the basis of the current rotating speed under the condition that the actual flow is not less than the flow demand; and under the condition that the actual flow is less than the flow demand, the rotating speed of the fixed-frequency pump is controlled and reduced on the basis of the highest rotating speed, so that the fixed-frequency pump can meet the overall cooling demand of the heat source equipment of the ship and can run at lower power to achieve the aim of energy conservation.
Description
Technical Field
The invention relates to the technical field of circulating pump control, in particular to a ship fixed-frequency pump cooling system, a control method thereof, electronic equipment and a storage medium.
Background
In order to reduce the pumping power loss of a sea-going cooling system and improve the energy utilization efficiency, a large ship is generally provided with a self-flowing cooling system, namely a water diversion port is arranged, seawater is pumped by utilizing a dynamic pressure head of a head-on flow caused by the ship in navigation, cooling seawater is provided for each heat source device by virtue of dynamic pressure conversion, and meanwhile, a circulating pump with certain power is arranged in a cooling pipeline to supplement the automatic water supply capacity of the water diversion port. Finally, the self-flowing cooling system generally adopts a hybrid driving mode of combining self-flowing and pump flowing to ensure the cooling requirement of the heat source equipment of the ship under all working conditions.
Therefore, the artesian cooling system can meet the supply requirement of the system circulation flow only by utilizing the dynamic pressure action of the water inlet under the high sailing working condition of the ship; under the working condition of low navigational speed, the circulating pump needs to be started to ensure the cooling requirement of the heat source equipment of the ship only by utilizing the dynamic pressure action of the water diversion port which is not enough to meet the supply requirement of the circulating flow of the system. That is to say, the control of circulating pump both must satisfy the cooling sea water flow demand of boats and ships heat source equipment, must do as far as possible with lower power operation, simultaneously, according to the demand of boats and ships operation condition, carries out quick adjustment in order to avoid the damage of heat source equipment, and these multiple demands greatly increased the control degree of difficulty of circulating pump. The traditional circulating pump control mode is usually only based on the cooling requirement of the heat source equipment of the ship, and the aims of energy conservation, quick adjustment and the like are difficult to be considered.
Disclosure of Invention
The invention provides a ship constant-frequency pump cooling system and a control method thereof, electronic equipment and a storage medium, which are used for solving the defect that the traditional circulating pump control mode is difficult to consider the aims of energy conservation, quick adjustment and the like only from the cooling requirement of ship heat source equipment.
The invention provides a ship fixed-frequency pump cooling system, which comprises:
the cooling pipeline is provided with a water diversion port and a water outlet;
the fixed-frequency pump is arranged in the cooling pipeline and used for adjusting the actual flow of the cooling water flowing through the cooling pipeline;
a flow meter provided in the cooling pipe for detecting an actual flow rate of the cooling water flowing through the cooling pipe;
the control subsystem is electrically connected with the fixed-frequency pump and the flowmeter and used for acquiring the flow demand and the actual flow of the cooling water and comparing the flow demand and the actual flow of the cooling water; if the actual flow is larger than or equal to the flow demand, controlling to reduce the rotating speed of the fixed-frequency pump on the basis of the current rotating speed; and if the actual flow is less than the flow demand, controlling to reduce the rotating speed of the fixed-frequency pump on the basis of the highest rotating speed.
According to the invention, the ship fixed-frequency pump cooling system comprises:
the server is electrically connected with the flowmeter and used for acquiring the flow demand and the actual flow of the cooling water and comparing the flow demand and the actual flow of the cooling water; under the condition that the actual flow is larger than or equal to the flow demand, generating a control command for reducing the rotating speed of the fixed-frequency pump on the basis of the current rotating speed; generating a control command for reducing the rotating speed of the fixed-frequency pump on the basis of the highest rotating speed under the condition that the actual flow is less than the flow demand;
and the server is electrically connected with the fixed-frequency pump through the controller and is used for controlling the fixed-frequency pump according to the control command.
According to the invention, the control subsystem further comprises:
and the operating platform is electrically connected with the server and used for inputting the flow demand of the cooling water.
The invention also provides a control method of the ship fixed-frequency pump cooling system, which comprises the following steps:
acquiring the actual flow and the flow demand of cooling water;
comparing the flow demand of the cooling water with the actual flow;
if the actual flow is larger than or equal to the flow demand, the rotating speed of the fixed-frequency pump is controlled to be reduced on the basis of the current rotating speed; and if the actual flow is less than the flow demand, controlling to reduce the rotating speed of the fixed-frequency pump on the basis of the maximum rotating speed.
According to the control method of the cooling system of the ship fixed-frequency pump, if the actual flow is larger than or equal to the flow demand, the step of controlling and reducing the rotating speed of the fixed-frequency pump on the basis of the current rotating speed comprises the following steps:
re-acquiring the actual flow of the cooling water, and comparing the re-acquired actual flow with the flow demand;
if the newly acquired actual flow is less than the flow demand, controlling the fixed-frequency pump to operate at the rotating speed before the current rotating speed is reduced;
and if the newly acquired actual flow is not less than the flow demand, controlling to reduce the rotating speed of the fixed-frequency pump on the basis of the current rotating speed, returning to the step of newly acquiring the actual flow of the cooling water, and controlling the fixed-frequency pump to operate at the rotating speed before the recent reduction until the newly acquired actual flow is less than the flow demand.
According to the control method of the ship constant frequency pump cooling system provided by the invention, if the actual flow is less than the flow demand, the step of controlling and reducing the rotating speed of the constant frequency pump on the basis of the maximum rotating speed comprises the following steps:
re-acquiring the actual flow of the cooling water, and comparing the re-acquired actual flow with the flow demand;
if the newly acquired actual flow is less than the flow demand, controlling the fixed-frequency pump to operate at the rotating speed before the highest rotating speed is reduced;
and if the reacquired actual flow is not less than the flow demand, controlling to reduce the rotating speed of the fixed-frequency pump on the basis of the highest rotating speed, returning to the step of reacquiring the actual flow of the cooling water, and controlling the fixed-frequency pump to operate at the rotating speed before the last reduction until the reacquired actual flow is less than the flow demand.
According to the control method of the ship fixed-frequency pump cooling system provided by the invention, the step of acquiring the actual flow of the cooling water comprises the following steps:
acquiring a plurality of flow values of cooling water in a preset time period;
the actual flow rate is determined based on an average of the plurality of flow rate values.
The invention also provides an electronic device, which comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein when the processor executes the program, the processor realizes the control method of the ship constant-frequency pump cooling system.
The present invention also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements a method of controlling a marine fixed frequency pump cooling system as described in any one of the above.
The invention also provides a computer program product comprising a computer program which, when executed by a processor, implements a method of controlling a marine fixed frequency pump cooling system as described in any one of the above.
The invention provides a ship fixed-frequency pump cooling system which is provided with a cooling pipeline, a fixed-frequency pump, a flow meter and a control subsystem, wherein the actual flow of cooling water is controlled by setting the fixed-frequency pump in the cooling pipeline, the flow demand and the actual flow of the cooling water are compared by using the control subsystem, and the rotating speed of the fixed-frequency pump is controlled and reduced on the basis of the current rotating speed under the condition that the actual flow is not less than the flow demand; and under the condition that the actual flow is less than the flow demand, the rotating speed of the fixed-frequency pump is controlled and reduced on the basis of the highest rotating speed, so that the fixed-frequency pump can meet the overall cooling demand of the heat source equipment of the ship and can run at lower power to achieve the aim of energy conservation.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for 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 diagram of a marine fixed frequency pump cooling system provided by the present invention;
FIG. 2 is a schematic flow chart of a control method of a ship constant-frequency pump cooling system provided by the invention;
FIG. 3 is a schematic structural diagram of a control subsystem according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an electronic device according to an embodiment of the present invention;
reference numerals:
1. a cooling duct; 10. a marine heat source device; 11. a water diversion port; 12. a water outlet; 2. a fixed frequency pump; 3. a flow meter; 4. a server; 5. a controller; 6. an operation table; 310. an acquisition module; 320. a comparison module; 330. a processing module; 410. a processor; 420. a communication interface; 430. a memory; 440. a communication bus.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, 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.
The ship fixed-frequency pump cooling system provided by the invention is described below with reference to fig. 1, and comprises: cooling pipeline 1, constant frequency pump 2, flowmeter 3 and control subsystem.
The cooling pipeline 1 is used for meeting the cooling requirement of the ship heat source equipment 10, the ship heat source equipment 10 is arranged on the cooling pipeline 1, the cooling pipeline 1 is provided with a water diversion port 11 and a water outlet 12, the ship heat source equipment 10 is located between the water diversion port 11 and the water outlet 12, the water diversion port 11 sucks seawater (cooling water) by utilizing a dynamic pressure head of an oncoming flow caused by a ship in a navigation process, and the water outlet 12 is used for discharging the sucked seawater.
The fixed-frequency pump 2 is provided with a plurality of fixed rotating speed gears, the flow is adjusted by switching the gears, and the fixed-frequency pump 2 is arranged in the cooling pipeline 1 and used for adjusting the actual flow of the cooling water flowing through the cooling pipeline 1 and mainly used for supplementing the automatic water supply capacity of the water diversion port 11. A flow meter 3 is provided in the cooling pipe 1 for detecting an actual flow rate of the cooling water flowing through the cooling pipe 1.
The control subsystem is electrically connected with the fixed-frequency pump 2 and the flowmeter 3 and is used for acquiring the flow demand and the actual flow of the cooling water and comparing the flow demand and the actual flow of the cooling water. And if the actual flow is not less than the flow demand, the control subsystem controls and reduces the rotating speed of the fixed-frequency pump on the basis of the current rotating speed. If the actual flow is less than the flow demand, the control subsystem controls and reduces the rotating speed of the fixed-frequency pump on the basis of the maximum rotating speed.
In a specific embodiment, when the ship sailing condition changes, the control subsystem acquires the flow demand Q of the cooling water under the current sailing speed and the environmental conditionsAnd meanwhile, the control subsystem acquires the actual flow Q of the cooling water through the flowmeter 3. Controlling the flow demand Q of the subsystemsAnd comparing and analyzing the actual flow Q.
When the actual flow Q is larger than or equal to the flow demand QsAnd then, if the current rotating speed of the fixed-frequency pump 2 meets the cooling requirement of the heat source equipment 10 of the ship, the rotating speed of the fixed-frequency pump 2 is controlled to be reduced on the basis of the current rotating speed. After the rotation speed of the fixed-frequency pump 2 is adjusted, the fixed frequency is adjustedThe pump 2 can satisfy the overall cooling demand of the heat source equipment 10 of the ship, can also operate at a lower power to give consideration to the energy saving target, reacquires the actual flow Q of the cooling water, and compares the reacquired actual flow Q with the flow demand Qs. If the newly acquired actual flow Q is less than the flow demand QsIf the current rotating speed of the fixed-frequency pump 2 does not meet the cooling requirement of the heat source equipment 10 of the ship, the fixed-frequency pump 2 is controlled to operate at the rotating speed before the current rotating speed is reduced. If the newly acquired actual flow Q is larger than or equal to the flow demand QsIf the current rotating speed of the fixed-frequency pump 2 meets the cooling requirement of the ship heat source equipment 10, the rotating speed of the fixed-frequency pump 2 is continuously controlled and reduced on the basis of the current rotating speed, and the step of obtaining the actual flow Q of the cooling water again is returned until the obtained actual flow Q is smaller than the flow requirement QsThe fixed frequency pump 2 is controlled to operate at the rotation speed before the latest reduction.
When the actual flow Q is less than the flow demand QsAnd then, the current rotating speed of the fixed-frequency pump 2 is shown not to meet the cooling requirement of the ship heat source equipment 10, and the rotating speed of the fixed-frequency pump 2 is directly controlled and reduced on the basis of the highest rotating speed in order to avoid the damage of the ship heat source equipment 10. After the rotating speed of the fixed-frequency pump 2 is adjusted, in order to enable the fixed-frequency pump 2 to meet the overall cooling requirement of the ship heat source equipment 10 and to operate at low power so as to achieve the energy-saving purpose, the actual flow Q of the cooling water is obtained again, and the obtained actual flow Q and the flow requirement Q are compareds. If the newly acquired actual flow Q is less than the flow demand QsIf the current rotating speed of the fixed-frequency pump 2 does not meet the cooling requirement of the heat source equipment 10 of the ship, the fixed-frequency pump 2 is controlled to operate at the rotating speed before the highest rotating speed is reduced. If the newly acquired actual flow Q is larger than or equal to the flow demand QsIf the current rotating speed of the fixed-frequency pump 2 meets the cooling requirement of the ship heat source equipment 10, the rotating speed of the fixed-frequency pump 2 is continuously controlled and reduced on the basis of the highest rotating speed, the step of obtaining the actual flow Q of the cooling water again is returned until the obtained actual flow Q is less than the flow requirement QsThe fixed frequency pump 2 is controlled to operate at the rotation speed before the latest reduction.
The ship fixed-frequency pump cooling system provided by the embodiment of the invention is provided with a cooling pipeline, a fixed-frequency pump, a flow meter and a control subsystem, the actual flow of cooling water is controlled by setting the fixed-frequency pump in the cooling pipeline, the flow demand of the cooling water is compared with the actual flow by using the control subsystem, and the rotating speed of the fixed-frequency pump is controlled and reduced on the basis of the current rotating speed under the condition that the actual flow is larger than or equal to the flow demand. And under the condition that the actual flow is less than the flow demand, the rotating speed of the fixed-frequency pump is controlled and reduced on the basis of the highest rotating speed, so that the fixed-frequency pump can meet the overall cooling demand of the heat source equipment of the ship and can run at lower power to achieve the aim of energy conservation.
Based on the above embodiments, in another embodiment provided by the present invention, as shown in fig. 1, the control subsystem includes: a server 4 and a controller 5.
Assuming that the controller 5 corresponding to the frequency-setting pump 2 is usually provided with n fixed speed gears, which are sequentially T from low to high1、T2、T3…TnWherein T is1And 0 means that the circulating pump is turned off, and the actual flow is adjusted by switching the speed gear.
Wherein, server 4 and flowmeter 3 electric connection, server 4 can obtain the flow demand of confirming the cooling water according to current navigational speed and environmental condition, and accessible flowmeter 3 obtains actual flow simultaneously, and server 4 is used for obtaining the flow demand and the actual flow of cooling water, compares the flow demand and the actual flow of cooling water. And generating a control command for reducing the rotating speed of the fixed-frequency pump 2 on the basis of the current rotating speed under the condition that the actual flow is larger than or equal to the flow demand. And in the case where the actual flow rate < the flow rate demand, a control command to lower the rotation speed of the fixed-frequency pump 2 on the basis of the maximum rotation speed is generated. The server 4 is electrically connected with the fixed-frequency pump 2 through the controller 5, and the controller 5 is used for controlling the fixed-frequency pump 2 according to the control command. When the actual flow is larger than or equal to the flow demand, the gear of the fixed-frequency pump 2 is lowered, and the rotating speed of the fixed-frequency pump 2 is reduced. When the actual flow is less than the flow demand, the gear T with the highest rotating speed is arrangednAnd regulating to a low speed.
In addition, an operator station 6 may be added to the control subsystem. The operation console 6 is electrically connected with the server 4, and the operation console 6 is used for inputting the flow demand of cooling water, so that data input by the operation console 6 can be sent to the data server 4, the flow demand does not need to be calculated by the server 4, and parameters in the control subsystem are manually adjusted.
The control method of the ship fixed-frequency pump cooling system provided by the invention is described in the following with reference to fig. 1 and 2, and comprises the following steps:
step S110: and acquiring the actual flow and the flow demand of the cooling water.
When the ship navigation working condition changes, the server 4 can obtain the flow demand Q of the cooling water according to the current navigation speed and the environmental working conditionsOr the flow demand Q of the cooling water is input by the ship control personnel through the operation platform 6s。
The server 4 acquires the actual flow rate Q through the flow meter 3. Specifically, a plurality of flow rate values of cooling water over a preset time period are acquired. The actual flow rate Q is determined based on an average, e.g., an arithmetic or geometric average, of a plurality of flow rate values.
The actual flow rate is calculated as follows: at a certain time period ta,tb]The monitored flow rate value is Q1、Q2、Q3…QkAnd k data are totally obtained, the real-time actual flow Q of the self-flowing cooling pipeline of the ship1For flow meter signals over time period ta,tb]Mean value of (i)
Step S120: the flow demand of the cooling water is compared with the actual flow.
At the time of obtaining the flow demand Q of the cooling watersComparing the flow demand Q of the cooling water after the actual flow QsAnd an actual flow rate Q.
Step S130: if the actual flow is larger than or equal to the flow demand, the rotating speed of the fixed-frequency pump is controlled to be reduced on the basis of the current rotating speed; and if the actual flow is less than the flow demand, controlling to reduce the rotating speed of the fixed-frequency pump on the basis of the highest rotating speed.
Assuming that the controller 5 corresponding to the frequency-setting pump 2 is normally set with n fixed rotation speedsThe gears are T in sequence from low to high1、T2、T3…TnWherein T is1And 0 means that the circulating pump is turned off, and the actual flow is adjusted by switching the speed gear.
When the actual flow Q is more than or equal to the flow demand QsAnd then, the current rotating speed of the fixed-frequency pump 2 is shown to meet the cooling requirement of the ship heat source equipment 10, the gear of the fixed-frequency pump 2 is lowered, and the rotating speed of the fixed-frequency pump 2 is controlled to be lowered on the basis of the current rotating speed.
After the rotating speed of the fixed-frequency pump 2 is adjusted, in order to enable the fixed-frequency pump 2 to meet the overall cooling requirement of the ship heat source equipment 10 and to run with lower power to achieve the energy-saving purpose, the circulating pump is sequentially adjusted from the current rotating speed gear to the low-speed gear, and the real-time circulating flow Q is ensured to be larger than or equal to Q after each adjustmentsOtherwise, the adjustment to the low gear is stopped.
That is, after the rotational speed of the fixed-frequency pump 2 is adjusted, the actual flow rate Q of the cooling water is newly acquired, and the newly acquired actual flow rate Q and the flow demand Q are compareds. If the newly acquired actual flow Q is less than the flow demand QsIf the current rotating speed of the fixed-frequency pump 2 does not meet the cooling requirement of the heat source equipment 10 of the ship, the fixed-frequency pump 2 is controlled to operate at the rotating speed before the current rotating speed is reduced. If the newly acquired actual flow Q is larger than or equal to the flow demand QsIf the current rotating speed of the fixed-frequency pump 2 meets the cooling requirement of the ship heat source equipment 10, the rotating speed of the fixed-frequency pump 2 is controlled to be reduced on the basis of the current rotating speed, and the step of obtaining the actual flow Q of the cooling water again is returned until the obtained actual flow Q is smaller than the flow requirement QsThe fixed frequency pump 2 is controlled to operate at the rotation speed before the latest reduction.
When the actual flow Q is less than the flow demand QsIn time, the current rotating speed of the fixed-frequency pump 2 is shown not to meet the cooling requirement of the ship heat source equipment 10, and the gear T with the highest rotating speed is used for avoiding the damage of the ship heat source equipment 10nAnd regulating to a low speed, and controlling to reduce the rotating speed of the fixed-frequency pump 2 on the basis of the maximum rotating speed.
After the rotating speed of the fixed-frequency pump 2 is adjusted, the fixed-frequency pump 2 can meet the overall cooling requirement of the heat source equipment 10 of the ship and can be lowPower running to save energy, and shifting the circulating pump from the highest speednAfter the adjustment is carried out in sequence to the low-speed gear, the real-time actual flow Q is ensured to be more than or equal to Q after each adjustmentsOtherwise, the adjustment to the low gear is stopped.
That is, after the rotational speed of the fixed-frequency pump 2 is adjusted, the actual flow rate Q of the cooling water is newly acquired, and the newly acquired actual flow rate Q and the flow demand Q are compareds. If the newly acquired actual flow Q is less than the flow demand QsIf the current rotating speed of the fixed-frequency pump 2 does not meet the cooling requirement of the heat source equipment 10 of the ship, the fixed-frequency pump 2 is controlled to operate at the rotating speed before the highest rotating speed is reduced. If the newly acquired actual flow Q is more than or equal to the flow demand QsIf the current rotating speed of the fixed-frequency pump 2 meets the cooling requirement of the ship heat source equipment 10, the rotating speed of the fixed-frequency pump 2 is controlled to be reduced on the basis of the highest rotating speed, and the step of obtaining the actual flow Q of the cooling water again is returned until the obtained actual flow Q is less than the flow requirement QsThe fixed frequency pump 2 is controlled to operate at the rotation speed before the latest reduction.
Finally, after the sailing working condition of the ship is changed every time, the fixed-frequency pump 2 can be adjusted to a proper rotating speed gear according to the steps, the overall cooling requirement of the ship heat source equipment 10 can be met, and the fixed-frequency pump 2 can be operated at low power to achieve the energy-saving purpose.
The following describes a control subsystem provided in an embodiment of the present invention, and the control subsystem described below and the control method described above may be referred to correspondingly.
As shown in fig. 3, the control subsystem includes: an acquisition module 310, a comparison module 320, and a processing module 330.
The obtaining module 310 is configured to obtain an actual flow rate and a flow demand of the cooling water; the comparison module 320 is used for comparing the flow demand of the cooling water with the actual flow; the processing module 330 is configured to control and reduce the rotation speed of the fixed-frequency pump on the basis of the current rotation speed when the actual flow rate is greater than or equal to the flow rate demand; and when the actual flow is less than the flow demand, controlling to reduce the rotating speed of the fixed-frequency pump on the basis of the highest rotating speed.
Fig. 4 illustrates a physical structure diagram of an electronic device, which may include, as shown in fig. 4: a processor (processor)410, a communication Interface 420, a memory (memory)430 and a communication bus 440, wherein the processor 410, the communication Interface 420 and the memory 430 are communicated with each other via the communication bus 440. The processor 410 may invoke logic instructions in the memory 430 to perform a method of controlling a marine fixed-frequency pump cooling system, the method comprising: acquiring the actual flow and the flow demand of cooling water; comparing the flow demand of the cooling water with the actual flow; if the actual flow is larger than or equal to the flow demand, the rotating speed of the fixed-frequency pump is controlled to be reduced on the basis of the current rotating speed; and if the actual flow is less than the flow demand, controlling to reduce the rotating speed of the fixed-frequency pump on the basis of the maximum rotating speed.
In addition, the logic instructions in the memory 430 may be implemented in the form of software functional units and stored in a computer readable storage medium when the software functional units are sold or used as independent products. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk, and various media capable of storing program codes.
In another aspect, the present invention also provides a computer program product, the computer program product including a computer program, the computer program being stored on a non-transitory computer readable storage medium, when the computer program is executed by a processor, the computer being capable of executing the method for controlling a ship fixed-frequency pump cooling system provided by the above methods, the method comprising: acquiring the actual flow and the flow demand of cooling water; comparing the flow demand of the cooling water with the actual flow; if the actual flow is larger than or equal to the flow demand, the rotating speed of the fixed-frequency pump is controlled to be reduced on the basis of the current rotating speed; and if the actual flow is less than the flow demand, controlling to reduce the rotating speed of the fixed-frequency pump on the basis of the maximum rotating speed.
In yet another aspect, the present invention also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements a control method for a ship fixed-frequency pump cooling system provided by the above methods, the control method comprising: acquiring the actual flow and the flow demand of cooling water; comparing the flow demand of the cooling water with the actual flow; if the actual flow is larger than or equal to the flow demand, the rotating speed of the fixed-frequency pump is controlled to be reduced on the basis of the current rotating speed; and if the actual flow is less than the flow demand, controlling to reduce the rotating speed of the fixed-frequency pump on the basis of the maximum rotating speed.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill 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 such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A marine fixed frequency pump cooling system, comprising:
the cooling pipeline is provided with a water diversion port and a water outlet;
the fixed-frequency pump is arranged in the cooling pipeline and used for adjusting the actual flow of the cooling water flowing through the cooling pipeline;
a flow meter provided in the cooling pipe for detecting an actual flow rate of the cooling water flowing through the cooling pipe;
the control subsystem is electrically connected with the fixed-frequency pump and the flowmeter and used for acquiring the flow demand and the actual flow of the cooling water and comparing the flow demand and the actual flow of the cooling water; if the actual flow is larger than or equal to the flow demand, controlling to reduce the rotating speed of the fixed-frequency pump on the basis of the current rotating speed; and if the actual flow is less than the flow demand, controlling to reduce the rotating speed of the fixed-frequency pump on the basis of the maximum rotating speed.
2. The marine fixed frequency pump cooling system of claim 1, wherein the control subsystem comprises:
the server is electrically connected with the flowmeter and used for acquiring the flow demand and the actual flow of the cooling water and comparing the flow demand and the actual flow of the cooling water; under the condition that the actual flow is larger than or equal to the flow demand, generating a control command for reducing the rotating speed of the fixed-frequency pump on the basis of the current rotating speed; generating a control command for reducing the rotating speed of the fixed-frequency pump on the basis of the highest rotating speed under the condition that the actual flow is less than the flow demand;
and the server is electrically connected with the fixed-frequency pump through the controller and is used for controlling the fixed-frequency pump according to the control command.
3. The marine fixed frequency pump cooling system of claim 2, wherein the control subsystem further comprises:
and the operating platform is electrically connected with the server and used for inputting the flow demand of the cooling water.
4. A control method of a ship constant-frequency pump cooling system is characterized by comprising the following steps:
acquiring the actual flow and the flow demand of cooling water;
comparing the flow demand of the cooling water with the actual flow;
if the actual flow is larger than or equal to the flow demand, the rotating speed of the fixed-frequency pump is controlled to be reduced on the basis of the current rotating speed; and if the actual flow is less than the flow demand, controlling to reduce the rotating speed of the fixed-frequency pump on the basis of the highest rotating speed.
5. The method for controlling the cooling system of the ship fixed-frequency pump according to claim 4, wherein if the actual flow rate is larger than or equal to the flow demand, the step of controlling to reduce the rotating speed of the fixed-frequency pump on the basis of the current rotating speed is followed by the steps of:
re-acquiring the actual flow of the cooling water, and comparing the re-acquired actual flow with the flow demand;
if the newly acquired actual flow is less than the flow demand, controlling the fixed-frequency pump to operate at the rotating speed before the current rotating speed is reduced;
and if the newly acquired actual flow is not less than the flow demand, controlling to reduce the rotating speed of the fixed-frequency pump on the basis of the current rotating speed, returning to the step of newly acquiring the actual flow of the cooling water, and controlling the fixed-frequency pump to operate at the rotating speed before the recent reduction until the newly acquired actual flow is less than the flow demand.
6. The method of claim 4, wherein the step of controlling the reduction of the speed of the fixed frequency pump based on the maximum speed is followed by the step of controlling the reduction of the speed of the fixed frequency pump based on the maximum speed if the actual flow rate < the flow rate requirement:
re-acquiring the actual flow of the cooling water, and comparing the re-acquired actual flow with the flow demand;
if the newly acquired actual flow is less than the flow demand, controlling the fixed-frequency pump to operate at the rotating speed before the highest rotating speed is reduced;
and if the reacquired actual flow is not less than the flow demand, controlling to reduce the rotating speed of the fixed-frequency pump on the basis of the highest rotating speed, returning to the step of reacquiring the actual flow of the cooling water, and controlling the fixed-frequency pump to operate at the rotating speed before the last reduction until the reacquired actual flow is less than the flow demand.
7. The method for controlling a ship fixed-frequency pump cooling system according to any one of claims 4 to 6, wherein the step of obtaining the actual flow rate of the cooling water comprises:
acquiring a plurality of flow values of cooling water in a preset time period;
the actual flow rate is determined based on an average of the plurality of flow rate values.
8. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor when executing the program implements a method of controlling a marine fixed frequency pump cooling system as claimed in any one of claims 4 to 7.
9. A non-transitory computer readable storage medium having stored thereon a computer program, wherein the computer program when executed by a processor implements a method of controlling a ship fixed frequency pump cooling system as claimed in any one of claims 4 to 7.
10. A computer program product comprising a computer program, wherein the computer program, when executed by a processor, implements a method of controlling a ship fixed frequency pump cooling system as claimed in any one of claims 4 to 7.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210153360.XA CN114572372A (en) | 2022-02-18 | 2022-02-18 | Ship constant-frequency pump cooling system, control method thereof, electronic device and storage medium |
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| CN202210153360.XA CN114572372A (en) | 2022-02-18 | 2022-02-18 | Ship constant-frequency pump cooling system, control method thereof, electronic device and storage medium |
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Application publication date: 20220603 |