Emergency and parking generator set series cooling system and working method

Abstract

The invention provides an emergency and parking generator set series cooling system which comprises a generator set and a water tank radiator arranged on one side of the wide edge of the generator set, the water tank radiator comprises a shell, a main radiator, an LTA radiator and a fan, and the main radiator, the LTA radiator and the fan are arranged in the shell. The system further comprises a thermostatic valve, a first fresh water pump, a second fresh water pump and an intercooler which are arranged on the generator set, the LTA plate cooler is arranged in the middle of the generator set and connected with the first electromagnetic valve, the second electromagnetic valve, the second fresh water pump and the LTA radiator through pipelines, and the second electromagnetic valve is further connected with a water pump through a pipeline. An inlet of the first fresh water pump is further connected with the main radiator, and the lubricating oil cooler is further connected with an outlet of the first fresh water pump. Layout is changed on the basis of an original structure, the LTA plate type cooler is connected in series, compared with the original structure, the cooling effect is better, the cooling efficiency is higher, and the temperature of cooling liquid of a low-temperature intercooling loop can be reduced to be below a set value.

Description

Technical Field

[0001] The present invention relates to the technical field of cooling down a generator set, and in particular to a series cooling system and a working method for an emergency and parked generator set. Background Art

[0002] Ship emission regulations require that the temperature of the coolant entering the low-temperature intercooler circuit must be lower than a certain value. If it is higher than this temperature, the exhaust gas emissions will not meet the regulatory requirements. The existing emergency and mooring generator set uses an engine-driven fan and a water tank radiator for cooling, but the ship's environmental design temperature is higher than the set value of the coolant entering the low-temperature intercooler circuit, so the coolant temperature cannot be reduced below the set value.

[0003] Therefore, it is urgent to design a new cooling system to reduce the coolant temperature of the low-temperature intercooling circuit to below the set value. Summary of the invention

[0004] In order to solve the problem that the prior art cannot reduce the temperature of the coolant in the low-temperature intercooling circuit to below the set value, the present invention proposes an emergency and parking generator set series cooling system, which can reduce the temperature of the coolant to below the set value.

[0005] The present invention is realized through the following technical scheme: it includes a generator set and a water tank radiator arranged on one side of the wide side of the generator set, the water tank radiator includes a shell and a main radiator, an LTA radiator and a fan arranged inside the shell, the fan faces the main radiator and the LTA radiator, and also includes a thermostatic valve and an intercooler arranged on the generator set, the intercooler is also connected to the LTA radiator and the second fresh water pump through a pipeline, the thermostatic valve is respectively connected to the inlet of the first fresh water pump, the lubricating oil cooler and the main radiator through pipelines, the LTA plate cooler is arranged in the middle of the generator set, and is respectively connected to the first solenoid valve, the second solenoid valve, the second fresh water pump and the LTA radiator through pipelines, the second solenoid valve is also connected to a water pump through a pipeline, the inlet of the first fresh water pump is also connected to the main radiator, the lubricating oil cooler is also connected to the outlet of the first fresh water pump, and coolant flows in the pipeline.

[0006] Furthermore, the water tank radiator also includes a first expansion water tank and a second expansion water tank which are arranged on the top of the shell and arranged side by side.

[0007] Furthermore, the first expansion water tank is connected to the pipelines between the intercooler and the LTA radiator and between the second fresh water pump and the LTA plate cooler through pipelines; the second expansion water tank is connected to the pipelines between the thermostatic valve and the main radiator and between the main radiator and the first fresh water pump through pipelines.

[0008] Furthermore, the first expansion water tank and the second expansion water tank are high-temperature water and low-temperature water expansion water tanks.

[0009] Furthermore, the coolant is fresh water at 36°C.

[0010] The present invention also provides a working method applicable to the series cooling system of the emergency and parking generator set described in the present invention, comprising the following steps:

[0011] Step 1: In emergency mode, the first solenoid valve, the second solenoid valve and the water pump are closed, and the coolant in the generator set flows out from the thermostatic valve. A part of it flows directly into the first fresh water pump, and then flows into the generator set through the thermostatic valve after being cooled by the lubricating oil cooler; the other part flows through the main radiator, the first fresh water pump, the lubricating oil cooler, and finally flows into the generator set through the thermostatic valve; at the same time, the coolant in the intercooler flows out from the intercooler, and flows into the intercooler after passing through the LTA radiator, the LTA plate cooler, and the second fresh water pump in sequence;

[0012] Step 2, parking mode, the first solenoid valve, the second solenoid valve and the water pump are opened, the coolant in the generator set flows out from the thermostatic valve, a part of it flows directly into the first fresh water pump, and then flows into the generator set through the thermostatic valve after being cooled by the lubricating oil cooler; the other part flows through the main radiator, the first fresh water pump, the lubricating oil cooler in turn, and finally flows into the generator set through the thermostatic valve; at the same time, the coolant in the intercooler flows out from the intercooler, flows through the LTA radiator, the LTA plate cooler, and the second fresh water pump in turn, and then flows into the intercooler; when the ambient temperature is lower than the working temperature of the LTA plate cooler, the main radiator and the LTA radiator are cooled by the air volume provided by the fan; when the ambient temperature is greater than or equal to the working temperature of the LTA plate cooler, the main radiator is cooled by the air volume provided by the fan, and the LTA radiator is first cooled by the air volume provided by the fan, and then cooled by the LTA plate cooler.

[0013] Furthermore, the operating temperature of the LTA plate cooler is 40°C.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The present invention changes the layout based on the original structure and connects a set of LTA plate coolers in series, which has better cooling effect and higher cooling efficiency than the original structure and can reduce the temperature of the coolant in the low-temperature intercooling circuit to below the set value.

[0016] 2. The present invention has a compact structure, simple installation and high efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front view of the overall structure of the generator set in the present invention.

[0018] Figure 2for Figure 1 Side view of.

[0019] Figure 3 Circuit diagram of the cooling system designed for the present invention.

[0020] Indicated in the figure:

[0021] 1. Main radiator; 2. Fan; 3. First fresh water pump; 4. Second fresh water pump; 5. Thermostatic valve; 6. First expansion water tank; 7. Second expansion water tank; 8. LTA radiator; 9. Intercooler; 10. Lubricating oil cooler; 11. LTA plate cooler; 12. First solenoid valve; 13. Second solenoid valve; 14. Water pump. DETAILED DESCRIPTION

[0022] Advantages and features of the present invention will be illustrated and explained by the following non-limiting description of preferred embodiments thereof, which are given by way of example only with reference to the accompanying drawings.

[0023] like Figures 1 to 3 As shown, Figure 1 A front view of the overall structure of the generator set designed for the present invention, Figure 2 A side view of the overall structure of the generator set designed for the present invention, Figure 3Circuit diagram of the cooling system designed for the present invention. The present invention designs a series cooling system for emergency and moored generator sets, including a generator set and a water tank radiator arranged on one side of the wide side of the generator set, wherein the water tank radiator includes a main radiator 1, an LTA radiator 8, a fan 2, a first expansion water tank 6 and a second expansion water tank 7. The main radiator 1, the fan 2 and the LTA radiator 8 are arranged inside the shell of the water tank radiator, and the fan 2 is used to air-cool the main radiator 1 and the LTA radiator 8. The first expansion water tank 6 and the second expansion water tank 7 are arranged on the top of the shell of the water tank radiator and arranged side by side. The first expansion water tank 6 and the second expansion water tank 7 are high-temperature water and low-temperature water expansion water tanks, which are used to adjust the pressure and heat inside the entire cooling system. The generator set is also connected to a first fresh water pump 3, a second fresh water pump 4, a thermostatic valve 5, an intercooler 9, a lubricating oil cooler 10 and an LTA plate cooler 11. The connection relationship between the thermostatic valve 5 and the intercooler 9 and the generator set is a prior art, so it will not be repeated in the present invention. The LTA plate cooler 11 is arranged in the middle of the generator set, and is connected to the first solenoid valve 12, the second solenoid valve 13, the second fresh water pump 4 and the LTA radiator 8 through pipelines. There are two coolant passages inside the LTA plate cooler 11. The coolant in the first passage enters the LTA plate cooler 11 through the LTA radiator 8 and flows out through the second fresh water pump 4. The coolant in the second passage enters the LTA plate cooler 11 through the second solenoid valve 13 and flows out through the first solenoid valve 12. The working temperature set for the LTA plate cooler 11 is 40°C, which is also the set value of the coolant in the intercooling circuit in the prior art. The second solenoid valve 13 is also connected to a water pump 14 through a pipeline.

[0024] The intercooler 9 is also connected to the LTA radiator 8 and the second fresh water pump 4 through pipelines. The coolant flows out of the intercooler 9, passes through the LTA radiator 8, the LTA plate cooler 11, the second fresh water pump 4 in sequence, and then flows back to the intercooler 9. The thermostatic valve 5 is connected to the inlet of the first fresh water pump 3, the lubricating oil cooler 10 and the main radiator 1 through pipelines. The lubricating oil cooler 10 is also connected to the outlet of the first fresh water pump 3, and the main radiator 1 is connected to the inlet of the first fresh water pump 3. The first expansion water tank 6 is connected to the pipelines between the intercooler 9 and the LTA radiator 8 and between the second fresh water pump 4 and the LTA plate cooler 11 through pipelines; the second expansion water tank 7 is connected to the pipelines between the thermostatic valve 5 and the main radiator 1 and between the main radiator 1 and the first fresh water pump 3 through pipelines.

[0025] There are four coolant passages in the cooling system of the present invention. The first passage is from the thermostatic valve 5, through the first fresh water pump 3, the lubricating oil cooler 10, and finally flows back to the thermostatic valve 5. The second passage is from the thermostatic valve 5, through the main radiator 1, the first fresh water pump 3, the lubricating oil cooler 10, and finally flows back to the thermostatic valve 5. The third passage is from the intercooler 9, through the LTA radiator 8, the LTA plate cooler 11, the second fresh water pump 4, and finally flows back to the intercooler 9. The fourth passage is from the water pump 14, through the second solenoid valve 13, the LTA plate cooler 11, the first solenoid valve 12, and finally flows out of the generator set.

[0026] The coolant in the present invention is preferably fresh water at 36° C., and seawater may also be used.

[0027] The present invention also provides a working method applicable to the series cooling system of the emergency and parking generator set described in the present invention, comprising the following steps:

[0028] Step 1, emergency mode. In this mode, the ship emission regulations do not have specific restrictions on the temperature of the ship's discharge liquid. Therefore, in the emergency mode, the first solenoid valve 12, the second solenoid valve 13 and the water pump 14 on the generator set are closed. At this time, the coolant in the generator set flows out from the thermostatic valve 5, a part of which flows directly into the first fresh water pump 3, and then flows into the generator set through the thermostatic valve 5 after being cooled by the lubricating oil cooler 10 to cool the generator set; the other part flows through the main radiator 1, the first fresh water pump 3, the lubricating oil cooler 10, and finally flows into the generator set through the thermostatic valve 5 to cool the generator set; at the same time, the coolant in the intercooler 9 flows out from the intercooler 9, and flows through the LTA radiator 8, the LTA plate cooler 11, and the second fresh water pump 4 to continue cooling. In this mode, the LTA plate cooler 11 does not work, and the LTA radiator 8 and the main radiator 1 are cooled by the air volume provided by the fan 2.

[0029] Step 2, mooring mode. In this mode, the ship emission regulations have restrictions on the temperature of the ship's discharge liquid, so the first solenoid valve 12, the second solenoid valve 13 and the water pump 14 on the generator set are opened and start working. At this time, the coolant in the generator set flows out from the thermostatic valve 5, a part of which directly flows into the first fresh water pump 3, and then flows into the generator set through the thermostatic valve 5 after being cooled by the lubricating oil cooler 10 to cool the generator set; the other part flows through the main radiator 1, the first fresh water pump 3, the lubricating oil cooler 10 in turn, and finally flows into the generator set through the thermostatic valve 5 to cool the generator set; at the same time, the coolant in the intercooler 9 flows out from the intercooler 9, flows through the LTA radiator 8, the LTA plate cooler 11, and the second fresh water pump 4 in turn, and then flows into the intercooler 9 to continue cooling. When the ambient temperature is lower than the operating temperature of the LTA plate cooler 11, the main radiator 1 and the LTA radiator 8 are cooled by the air volume provided by the fan 2; when the ambient temperature is greater than or equal to the operating temperature of the LTA plate cooler 11, the main radiator 1 is cooled by the air volume provided by the fan 2, and the LTA radiator 8 is first cooled by the air volume provided by the fan 2 and then cooled by the LTA plate cooler 11.

[0030] In addition to the above embodiments, the present application may also have other implementation modes. Any technical solutions formed by equivalent replacement or equivalent transformation shall fall within the protection scope required by the present application.

Claims

1. An emergency and moored generator set series cooling system, comprising a generator set and a water tank radiator arranged on one side of the wide side of the generator set, characterized in that: The water tank radiator comprises a shell, a main radiator (1), an LTA radiator (8) and a fan (2) arranged inside the shell, wherein the fan (2) faces the main radiator (1) and the LTA radiator (8), and further comprises a thermostatic valve (5) and an intercooler (9) arranged on the generator set, wherein the intercooler (9) is also connected to the LTA radiator (8) and the second fresh water pump (4) through pipelines, and the thermostatic valve (5) is respectively connected to the inlet of the first fresh water pump (3), the lubricating oil cooler (10) and the second fresh water pump (4) through pipelines. and a main radiator (1); an LTA plate cooler (11) is arranged in the middle of the generator set and is respectively connected to a first solenoid valve (12), a second solenoid valve (13), a second fresh water pump (4) and an LTA radiator (8) through pipelines; the second solenoid valve (13) is also connected to a water pump (14) through a pipeline; the inlet of the first fresh water pump (3) is also connected to the main radiator (1); the lubricating oil cooler (10) is also connected to the outlet of the first fresh water pump (3); and coolant flows in the pipeline.

2. The series cooling system for emergency and parking generator sets according to claim 1 is characterized in that: The water tank radiator also includes a first expansion water tank (6) and a second expansion water tank (7) which are arranged on the top of the shell and are arranged side by side.

3. The series cooling system for emergency and parking generator sets according to claim 2 is characterized in that: The first expansion water tank (6) is connected to the pipelines between the intercooler (9) and the LTA radiator (8) and between the second fresh water pump (4) and the LTA plate cooler (11) through pipelines; the second expansion water tank (7) is connected to the pipelines between the thermostatic valve (5) and the main radiator (1) and between the main radiator (1) and the first fresh water pump (3) through pipelines.

4. The series cooling system for emergency and parking generator sets according to claim 2 is characterized in that: The first expansion water tank (6) and the second expansion water tank (7) are high-temperature water and low-temperature water expansion water tanks.

5. The series cooling system for emergency and parking generator sets according to any one of claims 1 to 4, characterized in that: The cooling liquid is fresh water at 36°C.

6. A working method for a series cooling system for emergency and moored generator sets according to any one of claims 1 to 4, characterized in that: The following steps are involved: Step 1, emergency mode, the first solenoid valve (12), the second solenoid valve (13) and the water pump (14) are closed, and the coolant in the generator set flows out from the thermostatic valve (5), a part of which flows directly into the first fresh water pump (3), and then flows into the generator set through the thermostatic valve (5) after being cooled by the lubricating oil cooler (10); the other part flows through the main radiator (1), the first fresh water pump (3), the lubricating oil cooler (10) in sequence, and finally flows into the generator set through the thermostatic valve (5); at the same time, the coolant in the intercooler (9) flows out from the intercooler (9), flows through the LTA radiator (8), the LTA plate cooler (11), the second fresh water pump (4) in sequence, and then flows into the intercooler (9); Step 2, parking mode, the first solenoid valve (12), the second solenoid valve (13) and the water pump (14) are opened, and the coolant in the generator set flows out from the thermostatic valve (5), a part of which flows directly into the first fresh water pump (3), and then flows into the generator set through the thermostatic valve (5) after being cooled by the lubricating oil cooler (10); the other part flows through the main radiator (1), the first fresh water pump (3), the lubricating oil cooler (10) in sequence, and finally flows into the generator set through the thermostatic valve (5); at the same time, the coolant in the intercooler (9) flows out from the intercooler (9), flows through the LTA radiator (8), the LTA plate cooler (11), the second fresh water pump (4) in sequence, and then flows into the intercooler (9); when the ambient temperature is lower than the working temperature of the LTA plate cooler (11), the main radiator (1) and the LTA radiator (8) are cooled by the air volume provided by the fan (2); When the ambient temperature is greater than or equal to the operating temperature of the LTA plate cooler (11), the main radiator (1) is cooled by the air volume provided by the fan (2), and the LTA radiator (8) is first cooled by the air volume provided by the fan (2) and then cooled by the LTA plate cooler (11).

7. The method for operating the series cooling system for emergency and parking generator sets according to claim 6, characterized in that: The working temperature of the LTA plate cooler (11) is 40°C.

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