CN114056533A - Variable frequency control system and method for marine main seawater cooling pump - Google Patents
Variable frequency control system and method for marine main seawater cooling pump Download PDFInfo
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- CN114056533A CN114056533A CN202111469696.9A CN202111469696A CN114056533A CN 114056533 A CN114056533 A CN 114056533A CN 202111469696 A CN202111469696 A CN 202111469696A CN 114056533 A CN114056533 A CN 114056533A
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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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Abstract
The invention provides a frequency conversion control system and a frequency conversion control method of a marine main seawater cooling pump, wherein the system comprises a frequency converter control cabinet, three seawater pump motors, three seawater pump starters, a signal acquisition control box, a fresh water outlet temperature sensor and a seawater outlet temperature sensor; the seawater pump motor is connected with the frequency converter control cabinet through the seawater pump starter respectively; the fresh water outlet temperature sensor is arranged at a fresh water outlet of a central cooler, and the seawater outlet temperature sensor is arranged at a seawater outlet of the central cooler; the fresh water outlet temperature sensor and the seawater outlet temperature sensor are connected with the frequency converter control cabinet through the signal acquisition control box. According to the variable frequency control system and method for the marine main seawater cooling pump, variable frequency control of 3 seawater pumps of a marine central cooling system is realized through 1 frequency converter control cabinet with low initial investment, and energy consumption is reduced.
Description
Technical Field
The invention relates to the field of ship cooling systems, in particular to a variable frequency control system and method of a ship main seawater cooling pump.
Background
Most modern ships adopt a central low-temperature fresh water cooling system, seawater is pumped into a central cooler by a seawater cooling pump, the fresh water is cooled to a preset temperature (generally 36 ℃) through heat exchange of the central cooler, and then the low-temperature fresh water is used for cooling equipment such as main and auxiliary machines. The inlet of the central cooler is typically supplied with seawater by 3 main seawater pumps, 2 of which are working and 1 is on standby.
The sea water pump is mostly driven by a fixed-frequency motor in the past, and no matter in winter or summer, no matter whether the load of a main machine and an auxiliary machine is high or low, the sea water pump motor always works at a rated rotating speed, the power consumption is rated power, and the energy consumption is not economical enough; recently some newly-built sea water pumps have adopted frequency conversion control, generally are equipped with 3 converters, match 3 sea water pumps, and the converter can be according to ambient temperature and equipment load frequency modulation, adjusts the rotational speed of sea water pump motor, and then adjusts the flow of sea water pump, has realized the optimization of energy consumption, but 3 converters of increase have improved boats and ships cost.
The domestic trade boat is generally propelled by a low-speed diesel engine, a medium-speed diesel generator supplies power to the whole boat, a central cooling system is configured, a seawater cooling pump pumps seawater with relatively low temperature into a central cooler, the seawater is subjected to heat exchange with fresh water with relatively high temperature, the temperature of the fresh water is reduced, and then fresh water cooling equipment is arranged. The control of the seawater cooling pump has 2 schemes: according to the first scheme, a traditional fixed-frequency motor is adopted for a seawater cooling pump, rated output is realized anytime and anywhere, 3 seawater pumps driven by the fixed-frequency motor cannot timely reduce the frequency according to the environment temperature and the load of cooling equipment, and the energy consumption is high; scheme two, 3 sea water pumps are joined in marriage 3 converters, according to sea water temperature and cooling arrangement's heat transfer demand, in good time adjust motor speed and pump discharge capacity, and the energy consumption reduces, but the converter is expensive, and the initial investment is higher.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a variable frequency control system and a variable frequency control method for a marine main seawater cooling pump, which realize the variable frequency control of 3 seawater pumps of a marine central cooling system by using 1 frequency converter control cabinet and with lower initial investment, and reduce energy consumption.
In order to achieve the purpose, the invention provides a variable frequency control system of a marine main seawater cooling pump, which comprises a frequency converter control cabinet, a three-seawater pump motor, a three-seawater pump starter, a signal acquisition control box, a fresh water outlet temperature sensor and a seawater outlet temperature sensor, wherein the frequency converter control cabinet is connected with the three-seawater pump motor; the seawater pump motor is connected with the frequency converter control cabinet through the seawater pump starter respectively; the fresh water outlet temperature sensor is arranged at a fresh water outlet of a central cooler, and the seawater outlet temperature sensor is arranged at a seawater outlet of the central cooler; the fresh water outlet temperature sensor and the seawater outlet temperature sensor are connected with the frequency converter control cabinet through the signal acquisition control box.
The invention relates to a variable frequency control method of a marine main seawater cooling pump based on a variable frequency control system of the marine main seawater cooling pump, which comprises the following steps:
s1: the sea water pump starter comprises a first sea water pump starter, a second sea water pump starter and a third sea water pump starter; starting a corresponding sea water pump motor to run at a power frequency of 50Hz through the first sea water pump starter;
s2: the frequency converter control cabinet acquires the temperatures of a fresh water outlet of the central cooler and a seawater outlet of the central cooler through a signal acquisition control box, the fresh water outlet temperature sensor and the seawater outlet temperature sensor;
s3: and the frequency converter control cabinet controls the seawater pump starter according to the temperature at the fresh water outlet of the central cooler.
Preferably, in the step S3:
when the temperature of the fresh water outlet of the central cooler is lower than 36 ℃, the frequency converter control cabinet controls the first seawater pump starter to reduce the frequency until the temperature of the fresh water outlet of the central cooler is raised to 36 ℃; the second sea water pump starter and the third sea water pump starter are shut down for standby;
when the temperature of a fresh water outlet of the central cooler is higher than 36 ℃, the frequency converter control cabinet firstly controls the first seawater pump starter to increase the frequency until the power frequency is 50Hz, and then the first seawater pump starter is disconnected from the frequency converter control cabinet, and the seawater pump motor corresponding to the first seawater pump starter runs at the rated displacement; then the frequency converter control cabinet starts the second seawater pump starter, and according to the detected temperature at the fresh water outlet of the central cooler, the frequency converter control cabinet controls the speed of a seawater pump motor corresponding to the second seawater pump starter to increase or decrease and increases or decreases the flow of a seawater pump corresponding to the seawater pump motor, so that the temperature at the fresh water outlet of the central cooler is maintained at a preset value of 36 ℃; and the third seawater pump starter is stopped for standby.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
1. through the matching of a frequency converter control cabinet, a sea water pump motor, a sea water pump starter, a signal acquisition control box, a fresh water outlet temperature sensor and a sea water outlet temperature sensor, any 1 of 3 main cooling sea water pumps of a central cooler can be controlled by frequency conversion, and the frequency can be modulated timely according to the environment temperature and the loads of a main machine and an auxiliary machine, so that the optimal matching is realized, and the energy consumption is reduced;
2. only 1 frequency converter control cabinet is used, the frequency conversion control of 3 main cooling sea water pumps corresponding to the sea water pump motor is realized, and the initial investment is low.
Drawings
Fig. 1 is a schematic structural diagram of a variable frequency control system of a marine main seawater cooling pump according to an embodiment of the present invention.
Detailed Description
The following description of the preferred embodiment of the present invention, with reference to the accompanying drawings and fig. 1, will provide a better understanding of the function and features of the invention.
Referring to fig. 1, a frequency conversion control system of a marine main seawater cooling pump according to an embodiment of the present invention includes a frequency converter control cabinet 1, a three-seawater pump motor 2, a three-seawater pump starter, a signal acquisition control box 4, a fresh water outlet temperature sensor 5, and a seawater outlet temperature sensor 6; the seawater pump motor 2 is respectively connected with the frequency converter control cabinet 1 through a seawater pump starter; the fresh water outlet temperature sensor 5 is arranged at a fresh water outlet of a central cooler, and the seawater outlet temperature sensor 6 is arranged at a seawater outlet of the central cooler; the fresh water outlet temperature sensor 5 and the seawater outlet temperature sensor 6 are connected with the frequency converter control cabinet 1 through the signal acquisition control box 4. In this embodiment, the three seawater pump starters include a first seawater pump starter 31, a second seawater pump starter 32, and a third seawater pump starter 33.
The variable frequency control method of the marine main seawater cooling pump based on the variable frequency control system of the marine main seawater cooling pump of the embodiment of the invention comprises the following steps:
s1: starting a corresponding sea water pump motor 2 to run at a power frequency of 50Hz by a first sea water pump starter 31;
s2: the frequency converter control cabinet 1 acquires the temperatures of a fresh water outlet of the central cooler and a seawater outlet of the central cooler through a signal acquisition control box 4, a fresh water outlet temperature sensor 5 and a seawater outlet temperature sensor 6;
s3: the frequency converter control cabinet 1 controls the seawater pump starter according to the temperature at the fresh water outlet of the central cooler.
In the step S3:
when the temperature of the fresh water outlet of the central cooler is lower than 36 ℃, the frequency converter control cabinet 1 controls the first seawater pump starter 31 to reduce the frequency until the temperature of the fresh water outlet of the central cooler is raised to 36 ℃; the second seawater pump starter 32 and the third seawater pump starter 33 are stopped for standby;
when the temperature of the fresh water outlet of the central cooler is higher than 36 ℃, the frequency converter control cabinet 1 firstly controls the first seawater pump starter 31 to increase the frequency until the power frequency is 50Hz, and then the first seawater pump starter 31 is disconnected from the frequency converter control cabinet 1, and the seawater pump motor 2 corresponding to the first seawater pump starter 31 runs at the rated displacement; then the frequency converter control cabinet 1 starts a second seawater pump starter 32, and according to the detected temperature at the fresh water outlet of the central cooler, the frequency converter control cabinet 1 controls the speed increasing or reducing of a seawater pump motor 2 corresponding to the second seawater pump starter 32 and increases or decreases the flow of a seawater pump corresponding to the seawater pump motor 2, so that the temperature at the fresh water outlet of the central cooler is maintained at a preset value of 36 ℃; the third seawater pump starter 33 is stopped for use.
While the present invention has been described in detail and with reference to the embodiments thereof as illustrated in the accompanying drawings, it will be apparent to one skilled in the art that various changes and modifications can be made therein. Therefore, certain details of the embodiments are not to be interpreted as limiting, and the scope of the invention is to be determined by the appended claims.
Claims (3)
1. A frequency conversion control system of a marine main seawater cooling pump is characterized by comprising a frequency converter control cabinet, three seawater pump motors, three seawater pump starters, a signal acquisition control box, a fresh water outlet temperature sensor and a seawater outlet temperature sensor; the seawater pump motor is connected with the frequency converter control cabinet through the seawater pump starter respectively; the fresh water outlet temperature sensor is arranged at a fresh water outlet of a central cooler, and the seawater outlet temperature sensor is arranged at a seawater outlet of the central cooler; the fresh water outlet temperature sensor and the seawater outlet temperature sensor are connected with the frequency converter control cabinet through the signal acquisition control box.
2. A method for controlling the frequency conversion of a marine main seawater cooling pump based on the system for controlling the frequency conversion of a marine main seawater cooling pump according to claim 1, comprising the steps of:
s1: the sea water pump starter comprises a first sea water pump starter, a second sea water pump starter and a third sea water pump starter; starting a corresponding sea water pump motor to run at a power frequency of 50Hz through the first sea water pump starter;
s2: the frequency converter control cabinet acquires the temperatures of a fresh water outlet of the central cooler and a seawater outlet of the central cooler through a signal acquisition control box, the fresh water outlet temperature sensor and the seawater outlet temperature sensor;
s3: and the frequency converter control cabinet controls the seawater pump starter according to the temperature at the fresh water outlet of the central cooler.
3. The variable frequency control method of a marine main seawater cooling pump according to claim 2, wherein in the step S3:
when the temperature of the fresh water outlet of the central cooler is lower than 36 ℃, the frequency converter control cabinet controls the first seawater pump starter to reduce the frequency until the temperature of the fresh water outlet of the central cooler is raised to 36 ℃; the second sea water pump starter and the third sea water pump starter are shut down for standby;
when the temperature of a fresh water outlet of the central cooler is higher than 36 ℃, the frequency converter control cabinet firstly controls the first seawater pump starter to increase the frequency until the power frequency is 50Hz, and then the first seawater pump starter is disconnected from the frequency converter control cabinet, and the seawater pump motor corresponding to the first seawater pump starter runs at the rated displacement; then the frequency converter control cabinet starts the second seawater pump starter, and according to the detected temperature at the fresh water outlet of the central cooler, the frequency converter control cabinet controls the speed of a seawater pump motor corresponding to the second seawater pump starter to increase or decrease and increases or decreases the flow of a seawater pump corresponding to the seawater pump motor, so that the temperature at the fresh water outlet of the central cooler is maintained at a preset value of 36 ℃; and the third seawater pump starter is stopped for standby.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111469696.9A CN114056533A (en) | 2021-12-03 | 2021-12-03 | Variable frequency control system and method for marine main seawater cooling pump |
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| CN202111469696.9A CN114056533A (en) | 2021-12-03 | 2021-12-03 | Variable frequency control system and method for marine main seawater cooling pump |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20130053352A (en) * | 2011-11-16 | 2013-05-23 | 삼성중공업 주식회사 | Cooling system for ship and operation control method thereof and ship having the same |
| CN104699129A (en) * | 2013-12-09 | 2015-06-10 | 任波 | Automatic control system for water level of water tower |
| CN204572410U (en) * | 2015-02-04 | 2015-08-19 | 郑华娟 | A kind of constant pressure water supply control system |
| CN105539804A (en) * | 2015-12-24 | 2016-05-04 | 中国船舶重工集团公司第七0四研究所 | Frequency converting control system and control method suitable for central cooling system of ship |
| CN206031738U (en) * | 2016-07-25 | 2017-03-22 | 南通中船机械制造有限公司 | Cooling energy -saving control system of central authorities |
| CN107100860A (en) * | 2017-05-31 | 2017-08-29 | 国网天津市电力公司 | Steam Turbine condensate pump high voltage converter one drag two controls implementation |
| JP6311043B1 (en) * | 2017-02-09 | 2018-04-11 | 株式会社新来島どっく | Combine-integrated main engine heat exchanger and ship main engine cooling system |
| CN110745228A (en) * | 2019-11-15 | 2020-02-04 | 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） | Variable frequency control system of ship seawater cooling system and ship device |
| CN112572752A (en) * | 2020-11-27 | 2021-03-30 | 沪东中华造船(集团)有限公司 | Frequency conversion energy-saving method for marine seawater cooling pump |
-
2021
- 2021-12-03 CN CN202111469696.9A patent/CN114056533A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20130053352A (en) * | 2011-11-16 | 2013-05-23 | 삼성중공업 주식회사 | Cooling system for ship and operation control method thereof and ship having the same |
| CN104699129A (en) * | 2013-12-09 | 2015-06-10 | 任波 | Automatic control system for water level of water tower |
| CN204572410U (en) * | 2015-02-04 | 2015-08-19 | 郑华娟 | A kind of constant pressure water supply control system |
| CN105539804A (en) * | 2015-12-24 | 2016-05-04 | 中国船舶重工集团公司第七0四研究所 | Frequency converting control system and control method suitable for central cooling system of ship |
| CN206031738U (en) * | 2016-07-25 | 2017-03-22 | 南通中船机械制造有限公司 | Cooling energy -saving control system of central authorities |
| JP6311043B1 (en) * | 2017-02-09 | 2018-04-11 | 株式会社新来島どっく | Combine-integrated main engine heat exchanger and ship main engine cooling system |
| CN107100860A (en) * | 2017-05-31 | 2017-08-29 | 国网天津市电力公司 | Steam Turbine condensate pump high voltage converter one drag two controls implementation |
| CN110745228A (en) * | 2019-11-15 | 2020-02-04 | 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） | Variable frequency control system of ship seawater cooling system and ship device |
| CN112572752A (en) * | 2020-11-27 | 2021-03-30 | 沪东中华造船(集团)有限公司 | Frequency conversion energy-saving method for marine seawater cooling pump |
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