CN112357043B - Ship diesel power system - Google Patents
Ship diesel power system Download PDFInfo
- Publication number
- CN112357043B CN112357043B CN202011177555.5A CN202011177555A CN112357043B CN 112357043 B CN112357043 B CN 112357043B CN 202011177555 A CN202011177555 A CN 202011177555A CN 112357043 B CN112357043 B CN 112357043B
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- Prior art keywords
- heat exchanger
- outlet
- inlet
- conformal
- conformal heat
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H21/00—Use of propulsion power plant or units on vessels
- B63H21/38—Apparatus or methods specially adapted for use on marine vessels, for handling power plant or unit liquids, e.g. lubricants, coolants, fuels or the like
- B63H21/383—Apparatus or methods specially adapted for use on marine vessels, for handling power plant or unit liquids, e.g. lubricants, coolants, fuels or the like for handling cooling-water
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
Abstract
The embodiment of the invention provides a ship diesel power system, which comprises: the device comprises a diesel engine, a conformal heat exchanger and a jet device, wherein a first inlet and a first outlet of the conformal heat exchanger are respectively connected with the diesel engine; the second inlet of the conformal heat exchanger is used for flowing in seawater, and the second outlet is used for discharging the seawater; the fluidic device sets up in the second exit of conformal heat exchanger, and fluidic device's first entry is used for inhaling by the second export carminative sea water of conformal heat exchanger, and fluidic device's second entry is connected with the diesel engine blast pipe, and fluidic device's export is used for discharging sea water and the diesel engine blast pipe exhaust waste gas of diesel engine. According to the ship diesel power system provided by the embodiment of the invention, the jet device is arranged at the second outlet of the conformal heat exchanger, so that the heat exchange form of the conformal heat exchanger is changed into forced convection heat exchange under the action of turbulent diffusion, the flow rate of outboard seawater is increased, and the heat exchange efficiency of the conformal heat exchanger is improved.
Description
Technical Field
The invention relates to the technical field of ship outboard cooling, in particular to a ship diesel power system.
Background
The current ship outboard cooler is generally arranged at a sea chest, outboard seawater enters a cooler box through a bottom grid and exchanges heat with a heat medium in the outboard cooler, the seawater is heated after heat exchange, the density of the seawater is reduced, and the seawater rises to a high barrier of the cooler box to escape. The existing outboard cooler and seawater heat exchange form is natural convection, the heat exchange efficiency is low, only one barrier is arranged between the seawater and the outboard cooler, the outboard cooler is easily blocked by pollutants, the heat exchange capability of the outboard cooler is reduced, and the overheating accident of cooled equipment in a cabin is caused.
Disclosure of Invention
The embodiment of the invention provides a ship diesel power system, which is used for solving the defect of low heat exchange efficiency of an outboard cooler in the prior art.
The embodiment of the invention provides a ship diesel power system, which comprises: the device comprises a diesel engine, a conformal heat exchanger and a fluidic device, wherein a first inlet and a first outlet of the conformal heat exchanger are respectively connected with the diesel engine; the second inlet of the conformal heat exchanger is used for flowing in seawater, and the second outlet is used for discharging the seawater; the second inlet of the jet device is connected with a diesel engine exhaust pipe of the diesel engine, and the outlet of the jet device is used for discharging seawater and waste gas discharged from the diesel engine exhaust pipe.
According to one embodiment of the invention, the marine diesel power system, the conformal heat exchanger comprises: the inner shell plate is a ship body; an outer shell plate having a shape that matches the shape of the inner shell plate, and the outer shell plate is connected to the inner shell plate to construct a shell of the conformal heat exchanger; the shape of the heat exchange tube is matched with that of the inner shell plate, and the heat exchange tube is arranged in the shell.
According to the marine diesel power system of one embodiment of the present invention, the first inlet and the first outlet of the conformal heat exchanger are respectively formed on the inner shell plate; a second inlet and a second outlet of the conformal heat exchanger are respectively formed on the shell plates.
According to a marine diesel power system of one embodiment of the present invention, the conformal heat exchanger further comprises: an inlet grill disposed at a second inlet of the conformal heat exchanger and angled with respect to the shell plate; and the outlet barrier is arranged at a second outlet of the conformal heat exchanger and is arranged at an angle with the outer shell plate.
According to the marine diesel power system of one embodiment of the present invention, the conformal heat exchanger further comprises a plurality of baffle plates disposed within the housing and disposed at an angle to the heat exchange tubes.
According to one embodiment of the invention, the marine diesel power system comprises a diffusion opening and a nozzle, the nozzle is arranged in the diffusion opening, and a gap is formed between an outer wall of the nozzle and an inner wall of the diffusion opening, and the gap is configured as a first inlet of the jet device.
According to one embodiment of the marine diesel power system of the invention, the nozzle is connected to the diesel exhaust pipe and is configured as a second inlet of the fluidic device.
According to the ship diesel power system provided by the embodiment of the invention, the diffusion port comprises a first part, a second part and a third part which are sequentially connected, wherein a tapered structure is formed between two opposite end surfaces of the first part, two opposite end surfaces of the second part are arranged at equal intervals, and a tapered structure is formed between two opposite end surfaces of the third part.
According to a marine diesel power system according to an embodiment of the invention, the nozzles are arranged in a first and a second part of the diffusion opening, and a third part of the diffusion opening is configured as an outlet of the jet device.
According to one embodiment of the invention, the marine diesel power system further comprises a seawater barrier which is arranged on the hull shell plate and is located downstream of the diffusion opening.
According to the ship diesel power system provided by the embodiment of the invention, the jet device is arranged at the second outlet of the conformal heat exchanger, the waste gas is used as the working fluid of the jet device, the heated seawater is used as the sucked fluid, and under the action of turbulent diffusion, the heat exchange form of the conformal heat exchanger is changed into forced convection heat exchange, so that the flow rate of outboard seawater is increased, and the heat exchange efficiency of the conformal heat exchanger is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a marine diesel power system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the construction of the fluidic device;
FIG. 3 is an enlarged view at A in FIG. 1;
FIG. 4 is an enlarged view at B in FIG. 1;
fig. 5 is an enlarged view of the fluidic device of fig. 2.
Reference numerals:
1: a conformal heat exchanger; 2: an inner skin; 3: a heat exchange pipe; 4: an outer shell plate; 5: a first inlet; 6: a first outlet; 7: a second inlet; 8: a second outlet; 9: a baffle plate; 10: a seawater barrier; 11: a nozzle; 12: a first inlet of a fluidic device; 13: a diffusion port; 14: an inlet barrier; 15: an outlet barrier; 20: a diesel engine; 21 a diesel exhaust pipe; 22: a hull shell plate; 23: a diesel exhaust cooler; 24: a diesel exhaust gas regulating valve; 131: a first part; 132: a second section; 133: and a third section.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A marine diesel power system according to an embodiment of the present invention will be described with reference to fig. 1 to 5.
In one embodiment of the invention, as shown in fig. 1, a marine diesel power system comprises: conformal heat exchanger 1, fluidic device and diesel engine 20. The conformal heat exchanger 1 is connected with the diesel engine 20. The first inlet 5 of the conformal heat exchanger 1 is connected with the diesel engine 20, and is used for introducing cooling water in the diesel engine 20 into the shell side of the conformal heat exchanger 1, and the first outlet 6 of the conformal heat exchanger 1 is also connected with the diesel engine 20, and is used for flowing the cooling water in the shell side back into the diesel engine 20. The second inlet 7 of the conformal heat exchanger 1 is used for flowing seawater, the seawater flows to the tube pass of the conformal heat exchanger 1, and the second outlet 8 of the conformal heat exchanger 1 is used for discharging the seawater subjected to heat exchange.
Specifically, cooling water of the diesel engine 20 enters a shell side from a first inlet 5 of the conformal heat exchanger 1, seawater enters a tube side from a second inlet 7 of the conformal heat exchanger 1, the cooling water exchanges heat with the seawater, the cooled cooling water flows into the diesel engine 20 from a first outlet 6 of the conformal heat exchanger 1 to cool the diesel engine 20, and the heated seawater is discharged from a second outlet 8 of the conformal heat exchanger 1.
The fluidic device is arranged at the second outlet 8 of the conformal heat exchanger 1, heated seawater discharged from the second outlet 8 of the conformal heat exchanger 1 is sucked by the first inlet 12 of the fluidic device, the second inlet of the fluidic device is connected with the diesel engine exhaust pipe 21, and exhaust gas discharged from the diesel engine exhaust pipe 21 also enters the fluidic device. Under the action of turbulent diffusion, the heated seawater is mixed with the exhaust gas discharged from the diesel engine exhaust pipe 21 and then discharged through the outlet of the jet device.
Meanwhile, the diesel exhaust pipe 21 is connected to a diesel exhaust cooler 23, and a diesel exhaust control valve 24 is connected to the diesel exhaust pipe 21. The diesel engine exhaust gas temperature that diesel engine blast pipe 21 discharged is about 400 ℃, after getting into fluidic device, can heat the sea water around, because diesel engine exhaust gas temperature is high, can accelerate the upflow because density reduces after the sea water of direct contact with it is heated temperature rise after showing, improves the sea water outlet velocity of flow, strengthens conformal heat exchanger 1's heat transfer ability.
According to the ship diesel power system provided by the embodiment of the invention, the jet device is arranged at the second outlet of the conformal heat exchanger, the waste gas is used as the working fluid of the jet device, the heated seawater is used as the sucked fluid, and under the action of turbulent diffusion, the heat exchange form of the conformal heat exchanger is changed into forced convection heat exchange, so that the flow rate of outboard seawater is increased, and the heat exchange efficiency of the conformal heat exchanger is improved. Meanwhile, the ship diesel power system provided by the embodiment of the invention utilizes the waste heat of the diesel engine exhaust gas to heat the surrounding seawater, so that the flow velocity of the seawater outlet is improved, and the heat exchange capability of the conformal heat exchanger is also enhanced.
As shown in fig. 1, in one embodiment of the present invention, a conformal heat exchanger 1 comprises: an inner shell plate 2, a heat exchange tube 3 and an outer shell plate 4. Specifically, the conformal heat exchanger 1 provided by the embodiment of the invention is conformal to a ship structure, a part of a ship is used as an inner shell plate 2, and the shape of the heat exchange tube 3 and the shape of an outer shell plate 4 are matched with the shape of the inner shell plate 2 and are also in an arc-shaped structure because the ship is in an arc shape. The inner and outer skin plates 2, 4 are joined to form a shell of the conformal heat exchanger 1, within which the heat exchange tubes 3 are mounted.
Specifically, the inner shell 2 is formed with a first inlet 5 and a first outlet 6, and the cooling water for the diesel engine 20 flows into the shell side through the first inlet 5. The shell plate 4 is formed with a second inlet 7 and a second outlet 8, and seawater is introduced into the heat exchange tube 3 through the second inlet 7. After heat exchange between the tube-side seawater and the shell-side cooling water, the cooled cooling water flows into the diesel engine 20 through the first outlet 6, and the heated seawater flows out of the conformal heat exchanger 1 through the second outlet 8.
According to the ship diesel power system provided by the embodiment of the invention, the outboard heat exchanger is conformal to the ship body structure, outboard seawater flows in the tube side of the conformal heat exchanger, and diesel engine cooling water flows in the shell side of the conformal heat exchanger, so that the outboard space is fully utilized, the outboard heat exchanger is not limited to be arranged near the ship seabed door, and the flexible design of the installation position of the heat exchanger is realized.
As shown in fig. 3 and 4, in one embodiment of the present invention, the conformal heat exchanger 1 further comprises inlet and outlet grids 14 and 15. An inlet grill 14 is arranged at the second inlet 7 of the conformal heat exchanger 1, the inlet grill 14 being arranged obliquely to the shell plate 4. The provision of the inlet grill 14 prevents contaminants from easily clogging the conformal heat exchanger 1, improving the safety and reliability of the outboard cooling system. Meanwhile, the inlet grilles 14 are arranged obliquely to the outer shell plate 4 to reduce the resistance to inflow of seawater. An outlet grill 15 is provided at the second outlet 8 of the conformal heat exchanger 1, which is also obliquely arranged to the shell plate 4. The function of the arrangement is the same as that of the inlet grill 14.
As shown in fig. 1, in one embodiment of the present invention, the conformal heat exchanger 1 further comprises a plurality of baffles 9, the baffles 9 being disposed within the shell of the conformal heat exchanger 1 and being disposed at an angle to the heat exchange tubes 3. Specifically, baffles 9 are provided on the heat exchange tubes 3 with a gap formed between the top or bottom thereof and the shell wall to guide the flow of cooling water in the shell side.
In one embodiment of the invention, as shown in fig. 2, the fluidic device comprises a diffusion opening 13 and a nozzle 11. The nozzle 11 is arranged in the diffusion opening 13 and a gap is formed between the outer wall of the nozzle 11 and the inner wall of the diffusion opening 13, which gap is the first inlet 12 of the fluidic device for drawing in the heated seawater flowing out of the second outlet 8 of the conformal heat exchanger 1. The nozzle 11 is connected to the diesel exhaust pipe 21 and ejects exhaust gas discharged from the diesel exhaust pipe 21. Waste gas is as the working fluid of fluidic device, and the sea water that is heated is as being inhaled the fluid, and under the turbulent diffusion effect, the sea water that is heated is mixed with waste gas and is followed by diffusion mouth 13 and flow out outside the fluidic device, realizes the forced convection heat transfer of conformal heat exchanger 1, has improved conformal heat exchanger 1's heat exchange efficiency.
Further, as shown in fig. 5, in an embodiment of the present invention, the diffusion port 13 includes a first portion 131, a second portion 132 and a third portion 133 connected in sequence, wherein two opposite end surfaces of the first portion 131 have a tapered structure therebetween to facilitate the intake of heated seawater. The two opposite end surfaces of the second portion 132 are equidistant to form a tubular structure, and the two opposite end surfaces of the third portion 133 are in a divergent structure, so that the mixed waste gas and the heated seawater can flow out. The nozzles 11 are arranged in a first portion 131 and a second portion 132, the third portion 133 being configured as an outlet of the fluidic device.
In one embodiment of the invention, as shown in fig. 2, the marine diesel powered system further comprises a seawater barrier 10, and in particular the seawater barrier 10 is provided on the hull skin 22 at a distance from the diffuser 13 of the fluidic device to facilitate the passage of the seawater heated in the tube pass of the conformal heat exchanger 1 to the sea.
The working principle of the marine diesel power system provided by the embodiment of the invention is described in detail below with reference to fig. 1 and 2.
Cooling water of the diesel engine 20 flows into the shell side of the conformal heat exchanger 1 from the first inlet 5 of the conformal heat exchanger 1, seawater flows into the tube side of the conformal heat exchanger 1 from the second inlet 7 of the conformal heat exchanger 1, heat exchange is performed between the seawater and the cooling water, the cooled cooling water enters the diesel engine 20 from the first outlet 6 to cool the diesel engine 20, and the heated seawater flows out of the conformal heat exchanger 1 from the second outlet 8.
The fluidic device is installed at the second outlet 8 of the conformal heat exchanger 1, heated seawater is sucked by the first inlet 12 of the fluidic device, exhaust gas discharged from the exhaust pipe 21 of the diesel engine enters the fluidic device through the nozzle 11 of the fluidic device, the exhaust gas is used as working fluid of the fluidic device, the heated seawater is used as sucked fluid, and the heated seawater and the exhaust gas are mixed and then discharged through the diffusion port 13 of the fluidic device under the turbulent diffusion effect.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (7)
1. A marine diesel power system, comprising: a diesel engine, a conformal heat exchanger and a fluidic device,
the first inlet and the first outlet of the conformal heat exchanger are respectively connected with a diesel engine; the second inlet of the conformal heat exchanger is used for flowing in seawater, and the second outlet is used for discharging the seawater;
the jet device is arranged at a second outlet of the conformal heat exchanger, a first inlet of the jet device is used for sucking seawater discharged by the second outlet of the conformal heat exchanger, a second inlet of the jet device is connected with a diesel engine exhaust pipe of the diesel engine, and an outlet of the jet device is used for discharging seawater and exhaust gas discharged by the diesel engine exhaust pipe;
the conformal heat exchanger comprises:
the inner shell plate is a ship body;
an outer shell plate having a shape that matches the shape of the inner shell plate, and the outer shell plate is connected to the inner shell plate to construct a shell of the conformal heat exchanger;
the shape of the heat exchange tube is matched with that of the inner shell plate, and the heat exchange tube is arranged in the shell;
the jet device comprises a diffusion opening and a nozzle, wherein the nozzle is arranged in the diffusion opening, and a gap is formed between the outer wall of the nozzle and the inner wall of the diffusion opening and is configured as a first inlet of the jet device;
the diffusion mouth is including the first portion, second portion and the third portion that connect gradually, wherein, be the convergent structure between two relative terminal surfaces of first portion, the equidistance sets up between two relative terminal surfaces of second portion, be the convergent structure between two relative terminal surfaces of third portion.
2. The marine diesel power system of claim 1, wherein the first inlet and the first outlet of the conformal heat exchanger are respectively formed on the inner skin; a second inlet and a second outlet of the conformal heat exchanger are respectively formed on the shell plates.
3. The marine diesel power system of claim 2, wherein the conformal heat exchanger further comprises:
an inlet grill disposed at a second inlet of the conformal heat exchanger and angled with respect to the shell plate;
and the outlet barrier is arranged at a second outlet of the conformal heat exchanger and is arranged at an angle with the outer shell plate.
4. The marine diesel power system of claim 1, wherein the conformal heat exchanger further comprises a plurality of baffles disposed within the shell and disposed at an angle to the heat exchange tubes.
5. The marine diesel power system of claim 1, wherein the nozzle is connected to the diesel exhaust pipe and is configured as a second inlet of the fluidic device.
6. The marine diesel power system of claim 1, wherein the nozzle is disposed in a first and a second portion of the diffusion port, and a third portion of the diffusion port is configured as an outlet of the fluidic device.
7. The marine diesel power system of claim 1, further comprising a seawater barrier disposed on the hull sheathing downstream of the diffusion opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011177555.5A CN112357043B (en) | 2020-10-28 | 2020-10-28 | Ship diesel power system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011177555.5A CN112357043B (en) | 2020-10-28 | 2020-10-28 | Ship diesel power system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112357043A CN112357043A (en) | 2021-02-12 |
| CN112357043B true CN112357043B (en) | 2021-11-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011177555.5A Active CN112357043B (en) | 2020-10-28 | 2020-10-28 | Ship diesel power system |
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| Country | Link |
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| CN (1) | CN112357043B (en) |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6114420A (en) * | 1984-06-28 | 1986-01-22 | Nippon Kokan Kk <Nkk> | Seawater suction device for cooling engine of shipping on ice waters |
| JPS61105286A (en) * | 1984-10-29 | 1986-05-23 | Nippon Kokan Kk <Nkk> | Cooling seawater inhaling apparatus for ice-sea vessel |
| CN1022995C (en) * | 1991-04-13 | 1993-12-08 | 陈卫文 | Gravity water cooling device of ship engine |
| FR2868810B1 (en) * | 2004-04-07 | 2008-07-18 | Technicatome | METHOD AND SYSTEM FOR EXHAUST AND COOLING GASES FROM THERMODYNAMIC MACHINES ON SHIPS |
| CN201633913U (en) * | 2010-03-25 | 2010-11-17 | 广西玉柴机器股份有限公司 | Ship engine cooling system |
| KR20110123489A (en) * | 2010-05-07 | 2011-11-15 | 삼성중공업 주식회사 | Cooling apparatus for ship |
| CN102717886A (en) * | 2012-06-27 | 2012-10-10 | 大连海事大学 | Ship cooling system |
| CN202719899U (en) * | 2012-07-13 | 2013-02-06 | 王军 | Jet type low-pressure waste steam recovery device |
| KR20170095934A (en) * | 2014-12-12 | 2017-08-23 | 코닌클리케 필립스 엔.브이. | Cooling apparatus for cooling a fluid by means of surface water |
| CN106782697B (en) * | 2016-11-25 | 2017-12-01 | 中国核动力研究设计院 | A kind of compact heat exchanger |
| US10272983B2 (en) * | 2017-09-28 | 2019-04-30 | Strom W. Smith | Boat heat exchanger system and method |
| CN108020098A (en) * | 2017-12-13 | 2018-05-11 | 广新海事重工股份有限公司 | A kind of ship green energy conservation heat exchanger |
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2020
- 2020-10-28 CN CN202011177555.5A patent/CN112357043B/en active Active
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