CN105298815A - Method and system for controlling seawater cooling system - Google Patents
Method and system for controlling seawater cooling system Download PDFInfo
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- CN105298815A CN105298815A CN201510665357.6A CN201510665357A CN105298815A CN 105298815 A CN105298815 A CN 105298815A CN 201510665357 A CN201510665357 A CN 201510665357A CN 105298815 A CN105298815 A CN 105298815A
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Abstract
The invention discloses a method and system for controlling a seawater cooling system. The method comprises the following steps: according to a control instruction input by a user, respectively collecting the running power of main engine cooling equipment and auxiliary engine cooling equipment; according to the running power of the main engine cooling equipment and the auxiliary engine cooling equipment, calculating the total flow of seawater pumps; according to the total flow of the seawater pumps, the flow parameters of all seawater pumps and the historical running time of all seawater pumps, determining a first seawater pump needing to be started; starting the first seawater pump, and detecting the pressure switch signal of the first seawater pump; judging whether the pressure switch signal is a trouble signal or not; if not, controlling the first seawater pump to enter an intelligent speed control mode; if yes, sending a warning signal to the user, and automatically starting a spare pump. The method can improve the intelligent level of the seawater cooling system and save energy consumption.
Description
Technical field
The present invention relates to salt water cooling system field, particularly relate to a kind of controlling method and system of salt water cooling system.
Background technique
For ensureing the hot and cold water supply on boats and ships, boats and ships are all configured with salt water cooling system to control corresponding cooled with seawater equipment.Generally, boats and ships configure the cooling sea water pump matched with it according to full ship fever exchange capacity, dual-purpose one standby, carry out switching over by the control panel of salt water cooling system.And there are two kinds of control modes in salt water cooling system, a kind of chief engineer of being rule of thumb judges the startup quantity of cooling sea water pump, after startup, pump operates according to constant speed, another kind is that two cooling sea water pumps start together, regulates the flow of cooling sea water pump in running according to the demand of cooled with seawater amount.
Wherein, first method intelligence degree is low, and in different seasons and region, the inlet temperature of seawater and outlet temperature form the larger temperature difference, cannot change the flow of sea water pump, and seawater flow is excessive, and energy waste is serious.Second method cannot judge the sea water pump quantity of initial start, and sea water pump needs speed change always in running, long-term speed change has an impact to pump performance, cannot working time of conservative control sea water pump, usually cause a pump long-time running, and other air pump inoperatives, easily cause device fails.
Summary of the invention
The embodiment of the present invention proposes a kind of controlling method of salt water cooling system, can improve the intelligence degree of salt water cooling system, saves energy loss.
The embodiment of the present invention provides a kind of controlling method of salt water cooling system, comprising:
According to the control command of user's input, gather the operate power of main frame cooling equipment and subsidiary engine cooling equipment respectively;
According to the operate power of described main frame cooling equipment and described subsidiary engine cooling equipment, calculate sea water pump total discharge;
According to the flow parameter of described sea water pump total discharge, each sea water pump and the history run time of each described sea water pump, determine first sea water pump that need start;
Start described first sea water pump and detect the pressure switch signal of described first sea water pump;
Judge whether described pressure switch signal is trouble signal;
If not, then control described first sea water pump and enter intelligent speed-control pattern; Otherwise, send warning signal to user and automatically start stand by pump.
Further, the described operate power according to described main frame cooling equipment and described subsidiary engine cooling equipment, calculates sea water pump total discharge, is specially:
According to the operate power of described main frame cooling equipment and described subsidiary engine cooling equipment, calculate the total amount of cooling water of seawater needed for full ship;
According to the total amount of cooling water of described seawater, calculate and obtain sea water pump total discharge.
Further, the history run time of the described flow parameter according to described sea water pump total discharge, each sea water pump and each described sea water pump, determine first sea water pump that need start, be specially:
According to the total discharge of described sea water pump and the flow parameter of each described sea water pump, determine the quantity of the described sea water pump that need start;
According to history run time and the quantity of the described sea water pump that need start of each described sea water pump, select at least one described sea water pump as the first sea water pump.
Further, described first sea water pump of described control enters intelligent speed-control pattern, is specially:
Detect the temperature data of central panel cooler;
According to the temperature data of described central panel cooler, control described first sea water pump and enter speed-regulating mode or safe mode.
Further, the temperature data of described central panel cooler comprises: injection temperature, seawer outlet temperature and water outlet temperature;
The described temperature data according to described central panel cooler, controls described first sea water pump and enters speed-regulating mode or safe mode, be specially:
According to described injection temperature and seawer outlet temperature, calculate seawater and import and export temperature difference ratio A;
If when described seawer outlet temperature is more than or equal to 45 DEG C, then controls described first sea water pump and enter protected mode, the frequency variator of described first sea water pump is by maximum rated rotation speed operation;
If described seawer outlet temperature is less than 45 DEG C, A is less than or equal to 0.4, and described water outlet temperature lower than 34 DEG C time, then control described first sea water pump and enter speed-regulating mode, the frequency variator of described first sea water pump is by 0.4 times of running of rated speed;
If described seawer outlet temperature is less than 45 DEG C, A is less than or equal to 0.4, and when described water outlet temperature is more than or equal to 34 DEG C, then controls described first sea water pump and enter protected mode, and the frequency variator of described first sea water pump is by maximum rated rotation speed operation.
Further, the temperature data of described central panel cooler also comprises: fresh water inlet temperature;
The described temperature data according to described central panel cooler, controls described first sea water pump and enters speed-regulating mode or safe mode, be specially:
If described seawer outlet temperature is less than 45 DEG C, A is greater than 0.4, and when described fresh water inlet temperature is more than or equal to 55 DEG C, then controls described first sea water pump and enter protected mode, and the frequency variator of described first sea water pump is by maximum rated rotation speed operation;
If described seawer outlet temperature is less than 45 DEG C, A is greater than 0.4, and described water outlet temperature is less than 34 DEG C, and described fresh water inlet temperature is between 50 to 55 DEG C time, and the frequency variator of described first sea water pump doubly operates by the 1.2A of rated speed.
If described seawer outlet temperature is less than 45 DEG C, A is greater than 0.4, and described water outlet temperature is less than 34 DEG C, and described fresh water inlet temperature is between 45 to 50 DEG C time, and the frequency variator of described first sea water pump doubly operates by the A of rated speed.
If described seawer outlet temperature is less than 45 DEG C, A is greater than 0.4, and described water outlet temperature is less than 34 DEG C, and when described fresh water inlet temperature is less than 45 DEG C, the frequency variator of described first sea water pump doubly operates by the 0.8A of rated speed.
On the other hand, embodiments provide a kind of salt water cooling system, comprising:
Acquisition module, for the control command inputted according to user, gathers the operate power of main frame cooling equipment and subsidiary engine cooling equipment respectively;
Computing module, for the operate power according to described main frame cooling equipment and described subsidiary engine cooling equipment, calculates sea water pump total discharge;
Sea water pump determination module, for according to the flow parameter of described sea water pump total discharge, each sea water pump and the history run time of each described sea water pump, determines first sea water pump that need start;
Start detection module, for starting described first sea water pump and detecting the pressure switch signal of described first sea water pump;
Judge module, for judging whether described pressure switch signal is trouble signal;
With, control module, during for judging that described pressure switch signal is not trouble signal at described judge module, controlling described first sea water pump and entering intelligent speed-control pattern; And during for judging that described pressure switch signal is trouble signal at described judge module, sending warning signal to user and automatically starting stand by pump.
Further, described computing module comprises:
First computing unit, for the operate power according to described main frame cooling equipment and described subsidiary engine cooling equipment, calculates the total amount of cooling water of seawater needed for full ship;
With, the second computing unit, for according to the total amount of cooling water of described seawater, calculates and obtains sea water pump total discharge.
Further, described sea water pump determination module comprises:
Quantity determining unit, for according to the total discharge of described sea water pump and the flow parameter of each described sea water pump, determines the quantity of the described sea water pump that need start;
With, sea water pump determining unit, for according to history run time of each described sea water pump and the quantity of described sea water pump that need start, select at least one described sea water pump as the first sea water pump.
Further, described control module comprises:
Temperature detecting unit, for detecting the temperature data of central panel cooler;
With, control unit, for the temperature data according to described central panel cooler, controls described first sea water pump and enters speed-regulating mode or safe mode.
Implement the embodiment of the present invention, there is following beneficial effect:
The controlling method of a kind of salt water cooling system that the embodiment of the present invention provides and system, can according to the operate power of main and auxiliaries, determine the sea water pump quantity that need start, in conjunction with the history run time of each sea water pump, select working time the shortest sea water pump to start, and detect it and whether start normally, if started normally, enter intelligent speed-control pattern, if start abnormal, then warn to user and start stand by pump.Need artificially determine start number of units or directly start two Taiwan Straits water pumps compared to prior art, contemplated by the invention seawater out temperature factor, again in conjunction with the actual power of the equipment such as main frame subsidiary engine, and with amount of cooling water corresponding to actual power for controlling benchmark, pre-frequency control of motor speed is carried out to sea water pump, adaptability better and security of system, stable, more can reach energy-saving effect.And the present invention can select the startup quantity of sea water pump automatically, and select optimum sea water pump to start according to the history operating time, avoid equipment operation overlong time and damage equipment.In addition, after sea water pump enters intelligent speed-control pattern, according to characteristic curve of centrifugal pump, adopt stage control mode, and set minimum speed requirement, realize Energy Saving Control further.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the first embodiment of the access authentication method of wireless mesh network provided by the invention;
Fig. 2 is the schematic flow sheet of the second embodiment of the access authentication method of wireless mesh network provided by the invention;
Fig. 3 is the schematic flow sheet of the 3rd embodiment of the access authentication method of wireless mesh network provided by the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technological scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment 1
See Fig. 1, Fig. 1 is the hardware configuration schematic diagram of a kind of embodiment of salt water cooling system provided by the invention, as shown in Figure 1, this salt water cooling system comprises: sea water pump, frequency variator, local control box, pressure switch, pressure transducer PT, temperature transducer TT, touch screen, central panel cooler, main frame cooling equipment, subsidiary engine cooling equipment and other cooling equipments.Wherein, local control box is connected with frequency variator, pressure switch, pressure transducer, temperature transducer, touch screen, main frame cooling equipment, subsidiary engine cooling equipment and other cooling equipments respectively.Local control box is the core of whole control system, be mainly used in depositing PLC and DI/DO, AI/AQ module, and by gathering the coherent signal that relevant temperature, pressure and frequency variator feed back, adopt PID thermostatically control mode to send relevant control command, make the energy-saving effect that whole system reaches best.In addition, in Fig. 1 preferably 3 sea water pumps as an example, each sea water pump correspondence is configured with frequency variator and pressure switch.Frequency variator is the drive part of whole control system, carries out drived control to sea water pump rotating speed, and feeds back coherent signal to local control box.Pressure switch for gathering the outlet pressure signal of sea water pump, for the condition of sea water pump breakdown judge.Central authorities' panel cooler respectively 4 temperature transducer TT connects, and 4 temperature transducer TT measure injection temperature, seawer outlet temperature, water outlet temperature and fresh water inlet temperature successively.Pressure transducer PT for gathering the seawer inlet pressure of central panel cooler, to protect the working pressure of central panel cooler.Touch screen is provided with operation interface, and the related data of all sea water pumps of centralized displaying, comprises rotating speed, power, pressure, running state and control command etc.
Fig. 2 is the schematic flow sheet of a kind of embodiment of the controlling method of salt water cooling system provided by the invention.The method is applicable to the salt water cooling system shown in Fig. 1, comprises the following steps:
Step 101: according to the control command of user's input, gathers the operate power of main frame cooling equipment and subsidiary engine cooling equipment respectively.
In the present embodiment, user carrys out input control order by this locality control or telecontrol.Local control is undertaken by local button box, and the start and stop of the fingertip control sea water pump of the local button box of user operation, this local button box only comprises on off control.Telecontrol is shielded by remote touch and is carried out, and user operates on the interface that remote touch shield, and realization controls manually or automatically, Non-follow control comprise manually boot, manual governing etc.
In the present embodiment, after user's input control order, control system can gather the operate power of main frame cooling equipment and subsidiary engine cooling equipment in advance, for the cooled with seawater amount needed for full ship.
Step 102: according to the operate power of main frame cooling equipment and subsidiary engine cooling equipment, calculates sea water pump total discharge.
In the present embodiment, according to the operate power of main frame cooling equipment and subsidiary engine cooling equipment, calculate sea water pump total discharge, be specially: according to the operate power of main frame cooling equipment and subsidiary engine cooling equipment, calculate the total amount of cooling water of seawater needed for full ship; Again according to the total amount of cooling water of seawater, calculate and obtain sea water pump total discharge.The heat dissipating capacity corresponding under different capacity due to cooling equipment is inconsistent, and it is also different to the demand of cooled with seawater flow, therefore can calculate the cooled with seawater amount needed for full ship according to different operate powers.After calculating the total amount of cooling water of seawater needed for full ship, the total discharge obtaining sea water pump can be calculated.And heat exchanger exists certain hysteresis quality, by extracting the operate power of main frame cooling equipment, the pre-effect judged can be reached, at utmost realize energy-conservation.
Step 103: according to the flow parameter of sea water pump total discharge, each sea water pump and the history run time of each sea water pump, determine first sea water pump that need start.
In the present embodiment, according to the flow parameter of described sea water pump total discharge, each sea water pump and the history run time of each sea water pump, determine first sea water pump that need start, be specially: according to the total discharge of sea water pump and the flow parameter of each sea water pump, determine the quantity of the sea water pump that need start; According to history run time and the quantity of the sea water pump that need start of each sea water pump, select at least one Taiwan Straits water pump as the first sea water pump.Because the sea water pump on ship has configured, its flow parameter and performance are preset parameter, after acquisition sea water pump total discharge, in conjunction with the flow parameter of each sea water pump, and can automatic decision determine the quantity of the sea water pump that need start.And work long hours in order to avoid every Taiwan Straits water pump, before starting sea water pump, the signal that control system is fed back by the frequency variator gathering each sea water pump, determine the history run time of each Taiwan Straits water pump, by the history run time of more every Taiwan Straits water pump, the sea water pump of prioritizing selection history run shortest time, as the first sea water pump, guarantees that every Taiwan Straits water pump operation is balanced.If the sea water pump quantity that need start is N platform, then history run time order from less to more on time, selects N Taiwan Straits water pump as the first sea water pump successively.
One as the present embodiment is illustrated, control system obtains except the history run time except detecting feedback signal, can also at the inside setup times counter of control system, during every Taiwan Straits water pump operation, automatic starting time counter, and the working time of each sea water pump is compared, when starting next time, prioritizing selection working time, shorter sea water pump was as the first sea water pump.
Step 104: start the first sea water pump and detect the pressure switch signal of the first sea water pump.
In the present embodiment, each sea water pump is connected with the frequency variator of each self-configuring respectively, by transducer drive starting sea water pump.Meanwhile, corresponding signal feed back to control system, and is detected the pressure switch signal of the first boiling water pump by frequency variator by pressure switch.
Step 105: judge whether pressure switch signal is trouble signal, if not, then perform step 106, otherwise, perform step 107.
In the present embodiment, user can be, but not limited to pressure switch signal sets threshold value, when this pressure switch signal exceedes default threshold value, determines that this pressure switch signal is trouble signal, otherwise determines that this pressure switch signal is not trouble signal.
Step 106: control the first sea water pump and enter intelligent speed-control pattern.
In the present embodiment, control the first sea water pump and enter intelligent speed-control pattern, be specially: the temperature data detecting central panel cooler; According to the temperature data of central panel cooler, control the first sea water pump and enter speed-regulating mode or safe mode.
In the present embodiment, speed-regulating mode is that the frequency variator that sea water pump is corresponding operates according to the rotating speed preset, thus controls the flow of sea water pump.Safe mode is that frequency variator that sea water pump is corresponding is according to maximum rated rotation speed operation.
One as the present embodiment is illustrated, and the temperature data of central panel cooler comprises: injection temperature T1, seawer outlet temperature T2 and water outlet temperature T3.Control system is according to the temperature data of central panel cooler, control the first sea water pump and enter speed-regulating mode or safe mode, be specially: according to injection temperature and seawer outlet temperature, calculate seawater and import and export temperature difference ratio A, its formula is A=(T2-32 DEG C)/(T2-T1).If when seawer outlet temperature T2 is more than or equal to 45 DEG C, then controls the first sea water pump and enter protected mode, the frequency variator of the first sea water pump is by maximum rated rotation speed operation.If seawer outlet temperature T2 is less than 45 DEG C, A is less than or equal to 0.4, and water outlet temperature T3 lower than 34 DEG C time, then control the first sea water pump and enter speed-regulating mode, the frequency variator of the first sea water pump is by 0.4 times of running of rated speed.If seawer outlet temperature T2 is less than 45 DEG C, A is less than or equal to 0.4, and when water outlet temperature T3 is more than or equal to 34 DEG C, then controls the first sea water pump and enter protected mode, and the frequency variator of the first sea water pump is by maximum rated rotation speed operation.
One as the present embodiment is illustrated; if the temperature data of central panel cooler also comprises: fresh water inlet temperature T4; then according to the temperature data of central panel cooler; control the first sea water pump and enter speed-regulating mode or safe mode; be specially: if seawer outlet temperature T2 is less than 45 DEG C; A is greater than 0.4; and water outlet temperature T3 is greater than 34 DEG C or fresh water inlet temperature T4 when being more than or equal to 55 DEG C; then control the first sea water pump and enter protected mode, the frequency variator of the first sea water pump is by maximum rated rotation speed operation.If seawer outlet temperature T2 is less than 45 DEG C, A is greater than 0.4, and water outlet temperature T3 is less than 34 DEG C, and fresh water inlet temperature T4 is between 50 to 55 DEG C time, and the frequency variator of the first sea water pump doubly operates by the 1.2A of rated speed.If seawer outlet temperature T2 is less than 45 DEG C, A is greater than 0.4, and water outlet temperature T3 is less than 34 DEG C, and fresh water inlet temperature T4 is between 45 to 50 DEG C time, and the frequency variator of the first sea water pump doubly operates by the A of rated speed.If seawer outlet temperature T2 is less than 45 DEG C, A is greater than 0.4, and water outlet temperature T3 is less than 34 DEG C, and when fresh water inlet temperature T4 is less than 45 DEG C, the frequency variator of the first sea water pump doubly operates by the 0.8A of rated speed.
In the present embodiment, in whole control flow, first judge according to the log-on data of power to sea water pump of main frame cooling equipment and subsidiary engine cooling equipment, and before each startup, each sea water pump is compared, the sea water pump of preferential startup optimization shortest time.In running, if there is the situation of 1 Taiwan Straits water pump operation load increase, automatically start the second Taiwan Straits water pump.When existence 2 Taiwan Straits water pump operation but load reduce, when rotating speed continues too low, automatically stop a wherein Taiwan Straits water pump.Meanwhile, control system, according to the accumulation of the working time to sea water pump, provides relevant device maintenance and reminds.
Step 107: send warning signal to user and automatically start stand by pump.
In the present embodiment, if pressure switch signal is trouble signal, then send warning signal by touch screen to user, and stop the first sea water pump, automatically start stand by pump, thus protection sea water pump, avoid damaging sea water pump.After starting stand by pump, still need the pressure switch signal detecting stand by pump, if pressure switch signal is normal, this stand by pump enters intelligent speed-control pattern, if pressure switch signal is trouble signal, then warns to user, and stops using stand by pump.If there is other stand by pumps, then automatically start other stand by pumps.
In order to beneficial effect of the present invention is better described, see table 1, table 1 is energy-saving efficiency statistical table provided by the invention.The data of table 1 only consider that its energy consumption Energy-saving Data is as shown in table 1 because season and marine site are on the impact of injection temperature.Below calculate the power consumption of saving when only all running for all sea water pumps, when injection temperature is 20 DEG C, energy-saving efficiency is 28.9 DEG C, energy-conservation 17Kw per hour.If in conjunction with the operate power (the cooled with seawater amount under different capacity is different) of main process equipment, subsidiary engine equipment, energy-saving efficiency increases about 5% again, every Taiwan Straits pump energy saving efficiency can reach 33.9%, due to system band starting sea water pump quantity automatic decision function, some operating mode, separate unit sea water pump energy-conservation 100%.Other service factors comprehensive, the energy-saving efficiency of two Taiwan Straits water pumps is 45%.Moon fuel-economizing amount is: 45Kw*45%*24 hour * 30 days * 2 * 0.2Kg=5.9 tons, and can drop at the recovery plant initial stage in 1 year, economic benefit is particularly evident.
Table 1 energy-saving efficiency statistical table
Therefore, the controlling method of a kind of salt water cooling system that the embodiment of the present invention provides, can according to the operate power of main and auxiliaries, determine the sea water pump quantity that need start, in conjunction with the history run time of each sea water pump, the sea water pump selecting working time the shortest starts, and detect it and whether start normally, if start normal, enter intelligent speed-control pattern, if start abnormal, then warn to user and start stand by pump.Need artificially determine start number of units or directly start two Taiwan Straits water pumps compared to prior art, contemplated by the invention seawater out temperature factor, again in conjunction with the actual power of the equipment such as main frame subsidiary engine, and with amount of cooling water corresponding to actual power for controlling benchmark, pre-frequency control of motor speed is carried out to sea water pump, adaptability better and security of system, stable, more can reach energy-saving effect.And the present invention can select the startup quantity of sea water pump automatically, and select optimum sea water pump to start according to the history operating time, avoid equipment operation overlong time and damage equipment.In addition, after sea water pump enters intelligent speed-control pattern, according to characteristic curve of centrifugal pump, adopt stage control mode, and set minimum speed requirement, realize Energy Saving Control further.
To sum up, the controlling method of salt water cooling system provided by the invention, by conjunction with turbine characteristic, is optimized upgrading in logic in electrical control, mainly have the following advantages: 1, in initial start stage, the startup quantity of automatic decision sea water pump, without the need to artificial judgment, intelligence degree is high.2, the working time of automatic equalization 3 Taiwan Straits water pump, wherein 1 pump operation overlong time or too short is avoided.3, comprehensive characteristic curve of centrifugal pump, adopts stage control mode, and sets minimum speed requirement, energy-conservation to the full extent.4, when not having anti-loaded Rinsing unit, calculated by plc data accumulation, adjustment frequency variator rotating speed, reaches similar pre-washing function automatically.5, increase intelligent reminding function, provide pumping maintenance and remind.6, good expanded function, increases engine-room fan system as on the basis of dropping at lower cost.
Embodiment 2
It is the structural representation of a kind of embodiment of salt water cooling system provided by the invention see Fig. 3, Fig. 3.This seawater control system comprises: acquisition module 301, computing module 302, sea water pump determination module 303, start detection module 304, judge module 305 and control module 306.
The control command of acquisition module 301 for inputting according to user, gathers the operate power of main frame cooling equipment and subsidiary engine cooling equipment respectively.
Computing module 302, for the operate power according to main frame cooling equipment and subsidiary engine cooling equipment, calculates sea water pump total discharge.
Sea water pump determination module 303, for according to the flow parameter of sea water pump total discharge, each sea water pump and the history run time of each sea water pump, determines first sea water pump that need start.
Start detection module 304 is for starting the first sea water pump and detecting the pressure switch signal of the first sea water pump.
Judge module 305 is for judging whether pressure switch signal is trouble signal.
Control module 306, for when judge module 305 judges that pressure switch signal is not trouble signal, controls the first sea water pump and enters intelligent speed-control pattern; And for when judge module 305 judges that pressure switch signal is trouble signal, send warning signal to user and automatically start stand by pump.
One as the present embodiment is illustrated, and computing module 302 comprises: the first computing unit and the second computing unit.First computing unit is used for the operate power according to main frame cooling equipment and subsidiary engine cooling equipment, calculates the total amount of cooling water of seawater needed for full ship.Second computing unit is used for according to the total amount of cooling water of seawater, calculates and obtains sea water pump total discharge.
One as the present embodiment is illustrated, and sea water pump determination module 303 comprises: quantity determining unit and sea water pump determining unit.Quantity determining unit is used for according to the total discharge of sea water pump and the flow parameter of each sea water pump, determines the quantity of the sea water pump that need start.Sea water pump determining unit is used for, according to history run time of each sea water pump and the quantity of sea water pump that need start, selecting at least one Taiwan Straits water pump as the first sea water pump.
One as the present embodiment is illustrated, and control module 306 comprises: temperature detecting unit and control unit.Temperature detecting unit is for detecting the temperature data of central panel cooler.Control unit is used for the temperature data according to central panel cooler, controls the first sea water pump and enters speed-regulating mode or safe mode.
The more detailed working principle of the present embodiment and steps flow chart can be, but not limited to the relevant record see embodiment 1.
Therefore, the control system of a kind of salt water cooling system that the embodiment of the present invention provides, can according to the operate power of main and auxiliaries, determine the sea water pump quantity that need start, in conjunction with the history run time of each sea water pump, the sea water pump selecting working time the shortest starts, and detect it and whether start normally, if start normal, enter intelligent speed-control pattern, if start abnormal, then warn to user and start stand by pump.Need artificially determine start number of units or directly start two Taiwan Straits water pumps compared to prior art, contemplated by the invention seawater out temperature factor, again in conjunction with the actual power of the equipment such as main frame subsidiary engine, and with amount of cooling water corresponding to actual power for controlling benchmark, pre-frequency control of motor speed is carried out to sea water pump, adaptability better and security of system, stable, more can reach energy-saving effect.And the present invention can select the startup quantity of sea water pump automatically, and select optimum sea water pump to start according to the history operating time, avoid equipment operation overlong time and damage equipment.In addition, after sea water pump enters intelligent speed-control pattern, according to characteristic curve of centrifugal pump, adopt stage control mode, and set minimum speed requirement, realize Energy Saving Control further.
The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications are also considered as protection scope of the present invention.
Claims (10)
1. a controlling method for salt water cooling system, is characterized in that, comprising:
According to the control command of user's input, gather the operate power of main frame cooling equipment and subsidiary engine cooling equipment respectively;
According to the operate power of described main frame cooling equipment and described subsidiary engine cooling equipment, calculate sea water pump total discharge;
According to the flow parameter of described sea water pump total discharge, each sea water pump and the history run time of each described sea water pump, determine first sea water pump that need start;
Start described first sea water pump and detect the pressure switch signal of described first sea water pump;
Judge whether described pressure switch signal is trouble signal;
If not, then control described first sea water pump and enter intelligent speed-control pattern; Otherwise, send warning signal to user and automatically start stand by pump.
2. the controlling method of salt water cooling system according to claim 1, is characterized in that, the described operate power according to described main frame cooling equipment and described subsidiary engine cooling equipment, calculates sea water pump total discharge, is specially:
According to the operate power of described main frame cooling equipment and described subsidiary engine cooling equipment, calculate the total amount of cooling water of seawater needed for full ship;
According to the total amount of cooling water of described seawater, calculate and obtain sea water pump total discharge.
3. the controlling method of salt water cooling system according to claim 1, it is characterized in that, the history run time of the described flow parameter according to described sea water pump total discharge, each sea water pump and each described sea water pump, determine first sea water pump that need start, be specially:
According to the total discharge of described sea water pump and the flow parameter of each described sea water pump, determine the quantity of the described sea water pump that need start;
According to history run time and the quantity of the described sea water pump that need start of each described sea water pump, select at least one described sea water pump as the first sea water pump.
4. the controlling method of salt water cooling system according to claim 1, is characterized in that, described first sea water pump of described control enters intelligent speed-control pattern, is specially:
Detect the temperature data of central panel cooler;
According to the temperature data of described central panel cooler, control described first sea water pump and enter speed-regulating mode or safe mode.
5. the controlling method of salt water cooling system according to claim 4, is characterized in that, the temperature data of described central panel cooler comprises: injection temperature, seawer outlet temperature and water outlet temperature;
The described temperature data according to described central panel cooler, controls described first sea water pump and enters speed-regulating mode or safe mode, be specially:
According to described injection temperature and seawer outlet temperature, calculate seawater and import and export temperature difference ratio A;
If when described seawer outlet temperature is more than or equal to 45 DEG C, then controls described first sea water pump and enter protected mode, the frequency variator of described first sea water pump is by maximum rated rotation speed operation;
If described seawer outlet temperature is less than 45 DEG C, A is less than or equal to 0.4, and described water outlet temperature lower than 34 DEG C time, then control described first sea water pump and enter speed-regulating mode, the frequency variator of described first sea water pump is by 0.4 times of running of rated speed;
If described seawer outlet temperature is less than 45 DEG C, A is less than or equal to 0.4, and when described water outlet temperature is more than or equal to 34 DEG C, then controls described first sea water pump and enter protected mode, and the frequency variator of described first sea water pump is by maximum rated rotation speed operation.
6. the controlling method of salt water cooling system according to claim 5, is characterized in that, the temperature data of described central panel cooler also comprises: fresh water inlet temperature;
The described temperature data according to described central panel cooler, controls described first sea water pump and enters speed-regulating mode or safe mode, be specially:
If described seawer outlet temperature is less than 45 DEG C, A is greater than 0.4, and when described fresh water inlet temperature is more than or equal to 55 DEG C, then controls described first sea water pump and enter protected mode, and the frequency variator of described first sea water pump is by maximum rated rotation speed operation;
If described seawer outlet temperature is less than 45 DEG C, A is greater than 0.4, and described water outlet temperature is less than 34 DEG C, and described fresh water inlet temperature is between 50 to 55 DEG C time, and the frequency variator of described first sea water pump doubly operates by the 1.2A of rated speed.
If described seawer outlet temperature is less than 45 DEG C, A is greater than 0.4, and described water outlet temperature is less than 34 DEG C, and described fresh water inlet temperature is between 45 to 50 DEG C time, and the frequency variator of described first sea water pump doubly operates by the A of rated speed.
If described seawer outlet temperature is less than 45 DEG C, A is greater than 0.4, and described water outlet temperature is less than 34 DEG C, and when described fresh water inlet temperature is less than 45 DEG C, the frequency variator of described first sea water pump doubly operates by the 0.8A of rated speed.
7. a salt water cooling system, is characterized in that, comprising:
Acquisition module, for the control command inputted according to user, gathers the operate power of main frame cooling equipment and subsidiary engine cooling equipment respectively;
Computing module, for the operate power according to described main frame cooling equipment and described subsidiary engine cooling equipment, calculates sea water pump total discharge;
Sea water pump determination module, for according to the flow parameter of described sea water pump total discharge, each sea water pump and the history run time of each described sea water pump, determines first sea water pump that need start;
Start detection module, for starting described first sea water pump and detecting the pressure switch signal of described first sea water pump;
Judge module, for judging whether described pressure switch signal is trouble signal;
With, control module, during for judging that described pressure switch signal is not trouble signal at described judge module, controlling described first sea water pump and entering intelligent speed-control pattern; And during for judging that described pressure switch signal is trouble signal at described judge module, sending warning signal to user and automatically starting stand by pump.
8. salt water cooling system according to claim 7, is characterized in that, described computing module comprises:
First computing unit, for the operate power according to described main frame cooling equipment and described subsidiary engine cooling equipment, calculates the total amount of cooling water of seawater needed for full ship;
With, the second computing unit, for according to the total amount of cooling water of described seawater, calculates and obtains sea water pump total discharge.
9. salt water cooling system according to claim 7, is characterized in that, described sea water pump determination module comprises:
Quantity determining unit, for according to the total discharge of described sea water pump and the flow parameter of each described sea water pump, determines the quantity of the described sea water pump that need start;
With, sea water pump determining unit, for according to history run time of each described sea water pump and the quantity of described sea water pump that need start, select at least one described sea water pump as the first sea water pump.
10. salt water cooling system according to claim 7, is characterized in that, described control module comprises:
Temperature detecting unit, for detecting the temperature data of central panel cooler;
With, control unit, for the temperature data according to described central panel cooler, controls described first sea water pump and enters speed-regulating mode or safe mode.
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| CN201510665357.6A CN105298815A (en) | 2015-10-14 | 2015-10-14 | Method and system for controlling seawater cooling system |
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| CN201510665357.6A CN105298815A (en) | 2015-10-14 | 2015-10-14 | Method and system for controlling seawater cooling system |
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| CN201510665357.6A Pending CN105298815A (en) | 2015-10-14 | 2015-10-14 | Method and system for controlling seawater cooling system |
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| CN108105077A (en) * | 2017-12-27 | 2018-06-01 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七二研究所） | A kind of energy-saving type marine pump group intelligent management system and method |
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| CN108894964A (en) * | 2018-07-06 | 2018-11-27 | 葫芦岛海通电气设备制造有限公司 | A kind of frequency conversion sea water pump energy saver |
| CN109501997A (en) * | 2018-07-18 | 2019-03-22 | 上海锐机电有限公司 | Host cooling sea water pump frequency-changing control system |
| CN109524132A (en) * | 2018-10-12 | 2019-03-26 | 岭澳核电有限公司 | Control method and its control system applied to the cooling branch of Spent Fuel Pool |
| CN110745229A (en) * | 2019-11-26 | 2020-02-04 | 南通旭日船用机械有限公司 | Plate cooler seawater frequency conversion control method and system |
| CN110985364A (en) * | 2019-12-19 | 2020-04-10 | 芜湖航天特种电缆厂股份有限公司 | Backup pump self-starting system and method for cooling pump |
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| CN117703730A (en) * | 2023-12-25 | 2024-03-15 | 广州奕极机电科技有限公司 | Variable frequency control system for host cooling sea water pump and control method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108167170A (en) * | 2017-12-13 | 2018-06-15 | 广新海事重工股份有限公司 | A kind of frequency control center salt water cooling system |
| CN108105077A (en) * | 2017-12-27 | 2018-06-01 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七二研究所） | A kind of energy-saving type marine pump group intelligent management system and method |
| CN108894964A (en) * | 2018-07-06 | 2018-11-27 | 葫芦岛海通电气设备制造有限公司 | A kind of frequency conversion sea water pump energy saver |
| CN109501997B (en) * | 2018-07-18 | 2022-06-28 | 上海锐一机电有限公司 | Frequency conversion control system and method for main engine cooling seawater pump |
| CN109501997A (en) * | 2018-07-18 | 2019-03-22 | 上海锐机电有限公司 | Host cooling sea water pump frequency-changing control system |
| CN109524132A (en) * | 2018-10-12 | 2019-03-26 | 岭澳核电有限公司 | Control method and its control system applied to the cooling branch of Spent Fuel Pool |
| CN109524132B (en) * | 2018-10-12 | 2020-04-24 | 岭澳核电有限公司 | Control method and control system applied to spent fuel pool cooling branch |
| CN110745229A (en) * | 2019-11-26 | 2020-02-04 | 南通旭日船用机械有限公司 | Plate cooler seawater frequency conversion control method and system |
| CN110985364A (en) * | 2019-12-19 | 2020-04-10 | 芜湖航天特种电缆厂股份有限公司 | Backup pump self-starting system and method for cooling pump |
| CN112145406A (en) * | 2020-06-28 | 2020-12-29 | 中国舰船研究设计中心 | Energy-saving control method for sea water pump of central cooling system |
| CN113101796A (en) * | 2021-04-21 | 2021-07-13 | 上海船舶研究设计院（中国船舶工业集团公司第六0四研究院） | Seawater flow control method for desulfurization emission reduction system and central cooling system |
| CN114442547A (en) * | 2021-12-30 | 2022-05-06 | 河北长安汽车有限公司 | Control device and control method of unattended cooling equipment |
| CN114576150A (en) * | 2022-02-28 | 2022-06-03 | 国能神东煤炭集团有限责任公司 | Emulsion pump operation control method and system and storage medium |
| CN114934896A (en) * | 2022-05-30 | 2022-08-23 | 广船国际有限公司 | Water pump frequency conversion control method and system and ship |
| CN117703730A (en) * | 2023-12-25 | 2024-03-15 | 广州奕极机电科技有限公司 | Variable frequency control system for host cooling sea water pump and control method thereof |
| CN117703730B (en) * | 2023-12-25 | 2024-05-03 | 广州奕极机电科技有限公司 | Variable frequency control system for host cooling sea water pump and control method thereof |
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