CN112078773A - Series-parallel integrated marine cooling system and control method thereof - Google Patents
Series-parallel integrated marine cooling system and control method thereof Download PDFInfo
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- CN112078773A CN112078773A CN202010774070.8A CN202010774070A CN112078773A CN 112078773 A CN112078773 A CN 112078773A CN 202010774070 A CN202010774070 A CN 202010774070A CN 112078773 A CN112078773 A CN 112078773A
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- 238000001816 cooling Methods 0.000 title claims abstract description 180
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000013505 freshwater Substances 0.000 claims abstract description 153
- 239000013535 sea water Substances 0.000 claims description 41
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 238000004378 air conditioning Methods 0.000 description 23
- 239000000498 cooling water Substances 0.000 description 7
- 239000003507 refrigerant Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63J—AUXILIARIES ON VESSELS
- B63J2/00—Arrangements of ventilation, heating, cooling, or air-conditioning
- B63J2/12—Heating; Cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63J—AUXILIARIES ON VESSELS
- B63J2/00—Arrangements of ventilation, heating, cooling, or air-conditioning
- B63J2/02—Ventilation; Air-conditioning
Abstract
The invention relates to a series-parallel integrated marine cooling system and a control method thereof, wherein the series-parallel integrated marine cooling system comprises a user, a fresh water pump cooling pump, a fresh water pump cooling device and a cooling pipeline, the user comprises a user I and a user II, the fresh water cooling pump, the user and the fresh water cooling device are connected through the cooling pipeline to form a circulating cooling system, the fresh water cooling pump sends low-temperature fresh water to the user for heat exchange, and the fresh water is sent to the fresh water cooling device along the cooling pipeline for cooling and then returns to the fresh water cooling pump; the rear end of the second user is connected with a redirection pipeline, the other end of the redirection pipeline is connected with a cooling pipeline at the front end of the first user, and a fifth valve is further arranged on the redirection pipeline. The cooling system of the invention adjusts the cooling mode according to the temperature of the fresh water flowing to the fresh water cooling device, can carry out series-parallel connection conversion, and realizes the distribution and utilization of the fresh water to the maximum extent.
Description
Technical Field
The invention relates to the field of ship piping design, in particular to a serial-parallel integrated cooling system for a ship and a control method thereof.
Background
Atmospheric condensers and air conditioning compressors are common devices on ships. The atmospheric condenser is used for cooling high-temperature condensed water (generally about 135 ℃) on a ship condensed water pipeline to be below 80 ℃, then re-entering a boiler water supply system, and conveying the high-temperature condensed water to a boiler water side through a boiler water supply pump to be heated into saturated steam. When the atmospheric condenser is selected, in order to ensure enough margin, the total saturated steam evaporation capacity of the exhaust gas boiler or the exhaust gas economizer under the ISO working condition is generally used as the capacity selection basis of the atmospheric condenser.
In fact, because steam users on the steam ship are more, the actual heat exchange amount of the atmospheric condenser is far lower than the designed heat exchange amount, even condensed water is cooled to a lower temperature in the atmospheric condenser under partial working conditions, and then the condensed water needs to be reheated to 80 ℃ by steam generated by an oil-fired boiler, so that unnecessary waste is caused.
The air-conditioning compressor compresses the refrigerant, reduces the temperature of the refrigerant through cooling water, and then delivers the refrigerant to each independent cabin for the whole ship residence, the working cabin temperature adjustment and the like. The heat exchange amount of the air-conditioning compressor depends on the refrigerating capacity needed by the cabins, generally speaking, the refrigerating capacity needed is large when the ambient temperature is high, the refrigerating capacity needed is small when the ambient temperature is low, and steam heating or electric heating can be adopted under cold working conditions.
When the working conditions of the two devices are high in environment temperature, the heat exchange amount is large, the cooling water requirement of the air conditioner compressor is large, but the total heat exchange amount is relatively low, the temperature of a medium on the steam side of the atmospheric condenser is high, the medium is not sensitive to the temperature of the cooling water side, and the influences of the inlet temperatures of the cooling water of 36 ℃ and 45 ℃ on the atmospheric condenser are very small. The low-temperature cooling water is not fully utilized.
Disclosure of Invention
In order to realize the full utilization of cooling water and adjust the supply of the cooling water according to the requirement, the invention provides a serial-parallel integrated marine cooling system and a control method thereof, and the technical purpose of the invention is realized by the following technical scheme:
a series-parallel connection integrated marine cooling system comprises a user, a fresh water cooling pump, a fresh water cooling device and a cooling pipeline, wherein the fresh water cooling pump, the user, the fresh water cooling device and the fresh water cooling pump are connected through the cooling pipeline; the user at least comprises a user I and a user II, wherein the user I and the user II are connected in parallel, the cooling pipelines on two sides of the user I are respectively provided with a valve I and a valve II, and the cooling pipelines on two sides of the user II are respectively provided with a valve III and a valve IV; fresh water is arranged in the cooling pipeline, the fresh water at the first user can move to the second valve through the valve, and the fresh water at the second user can move to the fourth valve through the valve; the cooling pipeline on the side where the fresh water flows through the user is also provided with a temperature sensor.
Furthermore, a redirection pipeline is further arranged on the cooling pipeline between the second user and the fourth valve, one end of the redirection pipeline is connected with the cooling pipeline on one side of the second user, the other end of the redirection pipeline is connected to the cooling pipeline between the first valve and the first user, and a fifth valve is further arranged on the redirection pipeline.
Furthermore, the fresh water cooling device comprises a plate cooler and a seawater cooling pump, wherein the plate cooler comprises a fresh water chamber and a seawater chamber, and two ends of the fresh water chamber are respectively provided with a fresh water inlet and a fresh water outlet; the two ends of the seawater chamber are respectively provided with a seawater inlet and a seawater outlet; the fresh water inlet and the fresh water outlet are respectively connected with a cooling pipeline; the seawater inlet is connected with a seawater cooling pump.
Further, the fresh water cooling pump is a two-speed water pump, and the operation modes of the fresh water cooling pump comprise a low flow mode and a high flow mode.
Further, the seawater cooling pump is a two-speed water pump, and the operation modes of the seawater cooling pump comprise a low flow mode and a high flow mode.
A control method of the marine cooling system comprises a series mode and a parallel mode, wherein the cooling system is in the parallel mode when the temperature sensor detects that the temperature of the fresh water flowing to the fresh water cooling device is higher than 65 ℃, and the cooling system is in the series mode when the temperature sensor detects that the temperature of the fresh water flowing to the fresh water cooling device is lower than 50 ℃.
Further, in the parallel mode, the seawater cooling pump and the fresh water cooling pump are both operated in a high-flow mode, the valve I and the valve IV are opened, and the valve V is closed, so that fresh water flows through the user I and the user II respectively, and the user I and the user II are connected in parallel.
Further, in the series mode, the fresh water cooling pump and the seawater cooling pump are both operated in a low-flow mode, the valve five is opened, and the valve I and the valve IV are closed, so that fresh water flows through the user II and then flows through the user I, and the user II and the user I are connected in series.
Furthermore, when the parallel mode is changed into the series mode, the valve V is opened firstly, so that part of the fresh water flowing through the user II flows to the user I, and the valve IV is closed gradually, so that all the fresh water flowing through the user II flows to the user I; gradually closing the valve I to enable the user II and the user I to be connected in series; and then the fresh water cooling pump and the seawater cooling pump are respectively changed from the high-flow mode to the low-flow mode.
Further, when the series mode is changed into the parallel mode, the seawater cooling pump and the fresh water cooling pump are respectively changed from the low-flow mode to the high-flow mode; gradually opening the valve I again to enable part of fresh water delivered by the fresh water cooling pump to flow to a user I; gradually opening the valve IV to enable part of the fresh water flowing through the user II to directly flow to the fresh water cooling device; and gradually closing the valve five, so that the user I and the user II are connected in parallel.
The series-parallel integrated marine cooling system and the control method have the advantages that the series-parallel integrated marine cooling system and the control method can realize the conversion between series connection and parallel connection of the cooling system, the delivery of the fresh water is adjusted according to the temperature of the fresh water flowing through a user, the required fresh water is delivered more reasonably during cooling, the heat exchange of the fresh water is fully utilized, the energy consumption under the non-tropical working condition is effectively reduced, the energy is saved, the environment is protected, and the economic performance of the ship is improved.
Drawings
FIG. 1 is a schematic diagram of the series-parallel integrated marine cooling system of the present invention.
Fig. 2 is a schematic diagram of the fresh water cooling device of the present invention.
Fig. 3 is a schematic parallel view of the marine cooling system of the present invention.
Fig. 4 is a schematic view of a series connection of the marine cooling system of the present invention.
Fig. 5 is a schematic view of the cooling system for a ship in embodiment 1.
In the figure, 1, a fresh water cooling pump; 2. a cooling duct; 3. an atmospheric condenser; 4. an air conditioning compressor; 5. a first valve; 6. a second valve; 7. a third valve; 8. a fourth valve; 9. a fifth valve; 10. a temperature sensor; 11. a fresh water cooling device; 12. a plate cooler; 13. a seawater cooling pump; 14. a fresh water chamber; 15. a seawater chamber; 16. a fresh water inlet; 17. a fresh water outlet; 18. a seawater inlet; 19. a seawater outlet; 20. and (7) redirecting the pipeline.
Detailed Description
The technical solution of the present invention is further described below with reference to specific embodiments:
example 1
A series-parallel connection integrated cooling system for a ship comprises users, a fresh water cooling pump 1, a fresh water pump cooling device 11 and a cooling pipeline 2, wherein the users comprise a user I, a user II, a user III and the like, and can comprise more users, the user in the embodiment refers to equipment which generates heat and needs cooling when in operation, the user I refers to an atmospheric condenser 3 in the embodiment, the user II refers to an air conditioner compressor 4, and the air conditioner compressors 4 form an air conditioner compressor unit, the fresh water cooling pump 1, the user and the fresh water cooling device are connected through the cooling pipeline 2 to form a circulating cooling system, the fresh water cooling pump 1 sends low-temperature fresh water to the user through the cooling pipeline 2, the low-temperature fresh water flows through the user for heat exchange, the temperature of the fresh water rises, and the fresh water after temperature rise is sent to the fresh water cooling device 11 along the cooling. The atmospheric condenser 3 and the air-conditioning compressor 4 are connected in parallel, other users are also connected in parallel with the atmospheric condenser 3 and the air-conditioning compressor 4, and the low-temperature fresh water conveyed by the fresh water cooling pump 1 is used for cooling each user through the plurality of cooling pipelines 2 connected in parallel. A first valve 5 and a second valve 6 are respectively arranged on the cooling pipelines 2 at the two ends of the atmosphere condenser 3, the first valve 5 is arranged at the front end of the fresh water flowing through the atmosphere condenser 3, and the second valve 6 is arranged at the rear end of the fresh water flowing through the atmosphere condenser 3; a valve III 7 and a valve IV 8 are respectively arranged on the cooling pipelines 2 at the two ends of the air-conditioning compressor 4, the valve III 7 is arranged at the front end of the fresh water flowing through the air-conditioning compressor 4, and the valve IV 8 is arranged at the rear end of the fresh water flowing through the air-conditioning compressor 4; similarly, valves are provided in the cooling pipes 2 at both ends of other users. Temperature sensors 10 are respectively arranged on one sides of the cooling pipelines 2 at the rear ends of the second valve 6 and the fourth valve 8, the temperature of the fresh water flowing through the user is judged through the temperature sensors 10, if the temperature of the fresh water is lower than a certain value, the amount of the fresh water flowing through the user is too large, and the flow rate of the fresh water at the user can be reduced; if the temperature of the fresh water is higher than a certain value, it means that the amount of fresh water flowing through the consumer is insufficient, and it is necessary to increase the amount of fresh water flowing through the consumer.
Example 2
A series-parallel connection integrated cooling system for a ship is shown in figures 1-4 and comprises a user, a fresh water pump cooling pump 1, a fresh water pump cooling device 11 and a cooling pipeline 2, wherein the user comprises a user I, a user II, a user III and the like, the system can comprise more users, the user in the embodiment refers to equipment which is heated and needs to be cooled, in the embodiment, the user refers to the atmospheric condenser 3, the user refers to the air-conditioning compressors 4, the air-conditioning compressor units are formed by the air-conditioning compressors 4, the fresh water cooling pump 1, the user and the fresh water cooling device 11 are connected through the cooling pipeline 2 to form a circulating cooling system, the fresh water cooling pump 1 sends low-temperature fresh water to the user through the cooling pipeline 2, the low-temperature fresh water flows through the user for heat exchange, the temperature of the fresh water rises, and the temperature-raised fresh water is sent to the fresh water cooling device 11 along the cooling pipeline 2 to be cooled. The fresh water cooling device 11 comprises a plate cooler 12 and a seawater cooling pump 13, wherein the plate cooler 12 comprises a fresh water chamber 14 and a seawater chamber 15, and two ends of the fresh water chamber 14 are respectively provided with a fresh water inlet 16 and a fresh water outlet 17; the seawater inlet 18 and the seawater outlet 19 are respectively arranged at the two ends of the seawater chamber 15; the fresh water inlet 16 and the fresh water outlet 17 are respectively connected with the cooling pipeline 2; the seawater inlet 18 is connected with a seawater cooling pump 13. The fresh water cooling pump 1 is a two-speed water pump (model RVD450M manufactured by Shinko corporation), the operation modes thereof include a low flow rate mode and a high flow rate mode, the displacement, the lift, the motor power and the motor speed in the low flow rate mode are 1750 respectively, and the seawater cooling pump 13 is a two-speed water pump (model RVD450M manufactured by Shinko corporation), the operation modes thereof include a low flow rate mode and a high flow rate mode.
The atmospheric condenser 3 and the air-conditioning compressor 4 are connected in parallel, other users are also connected in parallel with the atmospheric condenser 3 and the air-conditioning compressor 4, and the low-temperature fresh water conveyed by the fresh water cooling pump 1 is used for cooling each user through the plurality of cooling pipelines 2 connected in parallel. A first valve 5 and a second valve 6 are respectively arranged on the cooling pipelines 2 at the two ends of the atmosphere condenser 3, the first valve 5 is arranged at the front end of the fresh water flowing through the atmosphere condenser 3, and the second valve 6 is arranged at the rear end of the fresh water flowing through the atmosphere condenser 3; a valve III 7 and a valve IV 8 are respectively arranged on the cooling pipelines 2 at the two ends of the air-conditioning compressor 4, the valve III 7 is arranged at the front end of the fresh water flowing through the air-conditioning compressor 4, and the valve IV 8 is arranged at the rear end of the fresh water flowing through the air-conditioning compressor 4; similarly, valves are provided in the cooling pipes 2 at both ends of other users. A redirecting pipe 20 is also connected to the cooling pipe 2 between the air conditioner compressor 4 and the valve four 8, the other end of the redirecting pipe 20 is connected to the cooling pipe 2 between the valve one 5 and the atmospheric condenser 3, and a valve five 9 is also arranged on the redirecting pipe 20. A temperature sensor 10 is further provided on the side of the cooling pipe 2 at the rear end of the second valve 6 and the fourth valve 8, and the temperature sensor 10 can measure the temperature of the fresh water after passing through the atmospheric condenser 3 and the air conditioner compressor 4.
According to the regulation and control method of the series-parallel integrated marine cooling system, the cooling modes between the atmospheric condenser 3 and the air-conditioning compressor 4 are in a series connection mode and a parallel connection mode:
the cooling system is in parallel mode when the temperature sensor 10 measures that the temperature of the fresh water flowing through the atmospheric condenser 3 and the air conditioner compressor 4 is higher than 65 ℃, and the cooling system is switched from parallel mode to series mode when the temperature sensor 10 measures that the temperature of the fresh water flowing through the atmospheric condenser 3 and the air conditioner compressor 4 is lower than 50 ℃.
The cooling system is in series mode when the temperature sensor 10 measures that the temperature of the fresh water flowing through the atmospheric condenser 3 and the air conditioner compressor 4 is lower than 50 ℃, and is switched from series mode to parallel mode when the temperature sensor 10 measures that the temperature of the fresh water flowing through the atmospheric condenser 3 and the air conditioner compressor 4 is higher than 65 ℃.
In the parallel mode, the seawater cooling pump 13 and the fresh water cooling pump 1 are both in the high-flow mode, the valve I5 and the valve IV 8 are opened, and the valve V9 is closed, so that fresh water flows through the atmospheric condenser 3 and the air-conditioning compressor 4 respectively, and the atmospheric condenser 3 and the air-conditioning compressor 4 are connected in parallel.
When the parallel mode is changed into the series mode, firstly opening a valve five 9 to enable part of fresh water flowing through the air conditioner compressor 4 to flow to the atmospheric condenser, and gradually closing a valve four 8 by the air conditioner compressor 3 to enable all the fresh water flowing through the air conditioner compressor 4 to flow to the atmospheric condenser 3; gradually closing the valve I5, so that the atmospheric condenser 3 and the air-conditioning compressor 4 are connected in series; and then the fresh water cooling pump 1 and the seawater cooling pump 13 are respectively changed from the high-flow mode to the low-flow mode.
In the series mode, the fresh water cooling pump 1 and the seawater cooling pump 13 are both in the low-flow mode, the valve five 9 is opened, and the valve one 5 and the valve four 8 are closed, so that fresh water flows through the air conditioner compressor 4 and then flows through the atmospheric condenser 3, and the atmospheric condenser 3 and the air conditioner compressor 4 are connected in series.
When the series mode is changed into the parallel mode, firstly, the seawater cooling pump 13 and the fresh water cooling pump 1 are respectively changed from the low-flow mode to the high-flow mode; gradually opening the valve I5 again to enable part of the fresh water delivered by the fresh water cooling pump 1 to flow to the atmospheric condenser 3; gradually opening the valve IV 8 to make part of the fresh water flowing through the air-conditioning compressor 4 directly flow to the fresh water cooling device 11; valve five 9 is again gradually closed so that there is a parallel connection between the atmospheric condenser 3 and the air conditioning compressor 4.
The present invention is further explained and not limited by the embodiments, and those skilled in the art can make various modifications as necessary after reading the present specification, but all the embodiments are protected by the patent law within the scope of the claims.
Claims (10)
1. A series-parallel connection integrated cooling system for a ship is characterized by comprising a user, a fresh water cooling pump, a fresh water cooling device and a cooling pipeline, wherein the fresh water cooling pump, the user, the fresh water cooling device and the fresh water cooling pump are connected through the cooling pipeline; the user at least comprises a first user and a second user, the first user and the second user are connected in parallel, the first valve and the second valve are respectively arranged on the cooling pipelines on the two sides of the first user, and the third valve and the fourth valve are respectively arranged on the cooling pipelines on the two sides of the second user; fresh water is arranged in the cooling pipeline, the fresh water at the first user can move to the second valve through the valve, and the fresh water at the second user can move to the fourth valve through the valve; and a temperature sensor is also arranged on the cooling pipeline on one side of the fresh water flowing through the user.
2. The series-parallel connection integrated marine cooling system according to claim 1, wherein a redirection pipeline is further arranged on the cooling pipeline between the second user and the fourth valve, one end of the redirection pipeline is connected with the cooling pipeline on one side of the second user, the other end of the redirection pipeline is connected to the cooling pipeline between the first valve and the first user, and a fifth valve is further arranged on the redirection pipeline.
3. The series-parallel connection integrated marine cooling system according to claim 1, wherein the fresh water cooling device comprises a plate cooler and a seawater cooling pump, the plate cooler comprises a fresh water chamber and a seawater chamber, and a fresh water inlet and a fresh water outlet are respectively arranged at two ends of the fresh water chamber; the two ends of the seawater chamber are respectively provided with a seawater inlet and a seawater outlet; the fresh water inlet and the fresh water outlet are respectively connected with a cooling pipeline; the seawater inlet is connected with a seawater cooling pump.
4. The series-parallel integrated marine cooling system of claim 1, wherein the fresh water cooling pump is a two-speed water pump and the operation modes comprise a low flow mode and a high flow mode.
5. The series-parallel integrated marine cooling system of claim 3, wherein the seawater cooling pump is a two-speed water pump, and the operation modes thereof comprise a low flow mode and a high flow mode.
6. A method of controlling a marine cooling system according to any one of claims 2 to 5, the method comprising a series mode and a parallel mode, the cooling system being in the parallel mode when the temperature sensor measures a temperature of fresh water flowing to the fresh water cooling means of greater than 65 ℃, and the cooling system being in the series mode when the temperature sensor measures a temperature of fresh water flowing to the fresh water cooling means of less than 50 ℃.
7. The control method of a marine cooling system according to claim 6, wherein in the parallel mode, the seawater cooling pump and the fresh water cooling pump are both operated in the high flow rate mode, the valve one and the valve four are opened, and the valve five is closed, so that fresh water flows through the user one and the user two respectively, and the user one and the user two are connected in parallel.
8. The control method of a marine cooling system according to claim 6, wherein in the series mode, the fresh water cooling pump and the seawater cooling pump are both operated in the low flow mode, the valve five is opened, and the valve one and the valve four are closed, so that fresh water flows through the user two and then flows through the user one, the user two and the user one in series.
9. The control method of the marine cooling system according to claim 7, wherein when the parallel mode is changed to the series mode, the valve five is opened first, so that part of the fresh water flowing through the user two flows to the user one, and the valve four is closed step by step, so that all the fresh water flowing through the user two flows to the user one; gradually closing the valve I to enable the user II and the user I to be connected in series; and then the fresh water cooling pump and the seawater cooling pump are respectively changed from the high-flow mode to the low-flow mode.
10. The control method of the marine cooling system according to claim 8, wherein when the series mode is changed to the parallel mode, the seawater cooling pump and the fresh water cooling pump are respectively changed from a low-flow mode to a high-flow mode; gradually opening the valve I again to enable part of fresh water delivered by the fresh water cooling pump to flow to a user I; gradually opening the valve IV to enable part of the fresh water flowing through the user II to directly flow to the fresh water cooling device; and gradually closing the valve five, so that the user I and the user II are connected in parallel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010774070.8A CN112078773A (en) | 2020-08-04 | 2020-08-04 | Series-parallel integrated marine cooling system and control method thereof |
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| CN202010774070.8A CN112078773A (en) | 2020-08-04 | 2020-08-04 | Series-parallel integrated marine cooling system and control method thereof |
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| CN112078773A true CN112078773A (en) | 2020-12-15 |
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Cited By (1)
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| CN114655414A (en) * | 2022-04-02 | 2022-06-24 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | High-energy-efficiency ship cooling system |
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Application publication date: 20201215 |
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| RJ01 | Rejection of invention patent application after publication |