CN1789079A - Sea ship air-conditioning system using subsurface seawater cool energy - Google Patents

Abstract

The invention relates to a sea-going ship air-conditioning system utilizing the cooling capacity of subsurface seawater, belonging to the technical field of ship engineering. The invention includes three parts: an air treatment device, a seawater conveying device and a seawater drawing device. The air treatment device and the seawater conveying device are connected through a seawater pipe, and the seawater conveying device and the seawater drawing device are connected through a deep water pipe. The air cooler in the air treatment unit is water-cooled, and its refrigerant is cold seawater from the subsurface. The seawater introduced from the depth of the subsurface is pumped into the air cooler through a seawater pump, and the air is cooled and discharged into the sea. The invention does not need to consume energy for maintaining the cold source of the air conditioner, saves most of the energy consumption in the traditional air conditioning system, and is an efficient, economical and clean air conditioning system. The system is simple in structure, low in cost, small in space, convenient in application, can adopt different water depths in different sea areas, flexible, maneuverable, energy-saving, and has obvious economic and social benefits.

Description

Sea-going ship air-conditioning system utilizing the cooling capacity of subsurface seawater

technical field

The invention relates to an air-conditioning system for a sea-going ship, in particular to an air-conditioning system for a sea-going ship utilizing the cooling capacity of subsurface seawater, and belongs to the technical field of ship engineering.

Background technique

In the existing ship air-conditioning system, the maintenance of the artificial cooling source needs to consume a lot of electric energy, and the electric energy consumed to overcome the resistance of the working fluid flow only accounts for a small part. Therefore, the traditional ship air-conditioning system cannot achieve a large reduction in energy consumption. consumption target. In the existing technology, the application number is CN200410024766.X, and the invention patent named "ship energy-saving air-conditioning system" uses the cooling capacity provided by the double-bottom space cooled by seawater outside the bottom of the ship, and forces the outside air to flow through the bottom of the ship when it is high temperature. In the double-bottom space cooled by seawater outside the ship, the cooled cold air is introduced into the ship’s air-conditioning piping system for indoor air-conditioning. Although no energy consumption is required and the structure is simple, the temperature of the seawater outside the bottom of the ship is close to normal temperature, and the contained cooling capacity is very weak. Air works poorly. In China, the coastal subsurface seawater has a depth of 10-300 meters and a temperature of 12-20°C, even as low as 6-12°C. It is a good natural cooling source for air conditioners. Referring to the distribution of the global average annual sea surface potential temperature and the vertical distribution of the zonal annual average potential temperature of the global ocean, even in sea areas between 30 degrees north latitude and 30 degrees south latitude, when the temperature reaches 35°C or higher, the sea surface The temperature is slightly higher, down to a depth of 100m-120m, and the seawater temperature is also kept below 22°C-24°C. Therefore, even in the hottest season, the temperature of the subsurface seawater below the surface along the coast is still low enough, the depth is limited, it is easy to take, and it can directly be used as a natural cooling source for air conditioning.

Contents of the invention

In order to overcome the deficiencies and defects of the prior art, the present invention provides a marine air conditioning system utilizing the cooling capacity of subsurface seawater. In addition to the small amount of power consumed by the flow of working fluid, the system does not need to consume power for the cold source, saving most of the power consumption. It is a cost-effective air-conditioning system.

The present invention is achieved through the following technical solutions. The invention consists of three parts: an air treatment device, a seawater conveying device and a seawater drawing device. The air handling device is a horizontal drum, along the flow direction of the air, arranged from left to right: return air inlet and fresh air inlet, damper, air mixing chamber, air filter, fan, air cooling chamber, Drain pipes, water baffles, air distribution chambers and supply ducts. The used air in the air-conditioning cabin flows in from the return air inlet, and the fresh air flows in from the fresh air inlet. The two streams of air flow through the air mixing chamber and the air filter through the damper, and the filtered air flows through the fan under the negative pressure of the fan. into the air cooler. The air cooler is water-cooled, and the refrigerant is natural cold sea water. The cold sea water passes through the finned tubes in the air cooler from bottom to top, and the air sweeps across the outside of the finned tubes to fully absorb the cooling capacity of the cold sea water, and flows to the water baffle while cooling down, and then flows through the air distribution chamber And into the air supply pipe. When the air is cooled in the cooler, part of the water vapor in the air condenses into water and stays along the finned tubes. When the air flows through the water baffle, part of the water also flows down due to the tortuous flow path. Both streams of condensate are drained through the drainpipe. The cold air flowing out of the air supply pipe will be introduced into the air outlets of each cabin to play the role of air conditioning and cooling.

The main body of the seawater delivery device is the seawater pump. The seawater introduced from the depth of the subsurface is pumped out by the seawater pump through the water inlet valve, and then enters the air cooler from the bottom of the air cooler through the outlet valve and sea water pipe, and then flows out of the air cooler from the top. , and then discharged into the sea.

When the flow measured at the flow/temperature measurement point decreases significantly, it means that the deep water pipe section is blocked. The shallow water inlet valve and return valve should be opened, and the water inlet valve and outlet valve should be closed. The seawater pump is pumped into the deep water pipe through the return valve, and then flows back to the sea from the subsurface depth of the seawater. At this time, the seawater return process will flush the deep water pipe section to achieve the purpose of dredging the pipe. After dredging, the water inlet valve and the water outlet valve are opened again to enter the normal working state, and the return valve and the shallow water inlet valve are closed again to cut off the return circuit.

In the seawater drawing device, the deep water pipe and the rubber pipe are tightly connected by means of a clamp. The rubber pipe is a rubber pipe with a wire mesh inside and can withstand a pressure of 3 MPa. The end of the rubber tube is an inlet, and the device has a filter head to prevent the inhalation of fish and algae. The rubber tube can be twisted by the hoist through the roller shaft as required, or retracted or lowered to adjust the depth of the seawater. When the sea-going ship is close to the estuary or port area, the filter head should be lifted to the position of 2 meters deep, the system will suspend its work, and resume its working state after going out to sea. When the ship is sailing in the Bohai Sea, the filter head is kept at a depth of 10-12 meters. When the ship is sailing in other sea areas along the coast of China, the filter head is kept at a depth of 50-80 meters. When the ship is sailing in the open sea Or other sea areas, keep at a depth of 80-100 meters, determined by the water temperature readings obtained at the flow/temperature measurement points.

The present invention has substantive features and remarkable progress. The sea-ship air-conditioning system of the invention does not need to consume energy for maintaining the cold source of the air-conditioning, and saves most of the energy consumption in the traditional air-conditioning system. It is an efficient, economical and clean air-conditioning system. The structure of the whole system is simple and compact, low in cost, small in space, convenient in application, can adopt different water depths in different sea areas, flexible, maneuverable, energy-saving, has wide promotion prospects, and has obvious economic and social benefits.

Description of drawings

Fig. 1 is a structural principle diagram of the air handling device of the sea-going air-conditioning system of the present invention.

Fig. 2 is a structural schematic diagram of the seawater conveying device of the air-conditioning system of the sea-going ship according to the present invention.

Fig. 3 is a structural schematic diagram of the seawater drawing device of the air-conditioning system of the sea-going ship according to the present invention.

Arrows in the figure indicate the direction of air flow.

Detailed ways

The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings.

As shown in Fig. 1, Fig. 2 and Fig. 3, the sea-going ship air-conditioning system of the present invention consists of three parts: an air treatment device, a seawater delivery device and a seawater extraction device. The air treatment device includes return air inlet 1, fresh air inlet 2, damper 3, air mixing chamber 4, air filter 5, fan 6, air cooler 7, drain pipe 8, water baffle 9, air distribution chamber 10 and delivery Air pipe 11; seawater delivery device includes seawater pump 12, water outlet valve 13, return valve 14, water inlet valve 15, shallow water inlet valve 16, shallow water pipe 17, deep water pipe 18, flow/temperature measurement point 19 and seawater pipe 20 The seawater drawing device includes a filter head 21, a hoist 22, a roller shaft 23, a clamp hoop 24 and a rubber tube 25. The air treatment device and the seawater conveying device are connected through a seawater pipe 20 , and the seawater conveying device and the seawater drawing device are connected through a deep water pipe 18 .

The air handling device is a horizontal cylinder, with the return air inlet 1 and the fresh air inlet 2 juxtaposed on the left end, and the damper 3, the air mixing chamber 4, the air filter 5, and the fan are arranged in sequence from left to right along the air flow direction. 6. Air cooler 7, water baffle 9, air distribution chamber 10, several air supply pipes 11 are arranged side by side at the right end of the horizontal cylinder, and the number of air supply pipes is set according to the needs of the cabin. There is a certain distance between every two adjacent parts in the air handling device, as a buffer mixing space, the inflow and outflow sections of the fan 6 are provided with conical transition pipes to prevent excessive turbulence of the air flow, the air cooler 7 and the baffle A water collection space is arranged on the lower edge of the water plate 9 and communicated with the drain pipe 8 to facilitate the drainage of condensed water. The seawater pipe 20 communicated with the bottom of the air cooler 7 is the inlet pipe of cold seawater. The top of the air cooler 7 communicates with the sea and discharges hot sea water.

In the seawater delivery device, the outlet of the seawater pump 12 is divided into two paths, one path communicates with the bottom of the air cooler 7 through the water outlet valve 13 and the seawater pipe 20; The inlet of the seawater pump 12 is also divided into two paths, one path is connected with one end of the deep water pipe 18 through the water inlet valve 15; the other path is connected with the shallow water pipe 17 through the shallow water inlet valve 16. The end of the shallow water pipe 17 is inserted into the depth of 2 meters in the seawater. A flow/temperature measuring point 19 is set in the seawater pipe 20 close to the water outlet valve 13 for installing a temperature sensor and a flow sensor. The seawater introduced from the depth of the subsurface is pumped out by the seawater pump 12 through the water inlet valve 15, passes through the water outlet valve 13 and the seawater pipe 20, enters the air cooler 7 from the bottom of the air cooler 7, and then flows out of the air cooler 7 from the top. Discharged into the sea.

The seawater drawing device is installed on the deck 26. In the seawater drawing device, the other end of the deep water pipe 18 is tightly connected with the rubber pipe 25 by means of the clamp 24. The rubber pipe 25 is a rubber pipe with a wire mesh inside and can withstand 3 MPa. pressure. The rubber tube 25 is twisted by the hoist 22 through the roller shaft 23, or is retracted or lowered to adjust the depth of the seawater. The end of rubber tube 25 is connected with filter screen head 21 pipes, and becomes the suction port of cold sea water. When the ship is sailing in the Bohai Sea, the filter head 21 is kept at a depth of 10-12 meters; when the ship is sailing in other sea areas along the coast of China, the filter head 21 is kept at a depth of 50-80 meters When in the open sea or other sea areas, remain at the depth of 80-100 meters, the depth output by the filter head 21 is determined according to the water temperature reading obtained by the flow/temperature measuring point 19.

The deep-water pipe 18 can be selected from seawater corrosion-resistant stainless steel pipes or cheap hot-dip aluminized steel pipes. Deep water pipe 18 and rubber pipe 25 nominal diameters that are clamped with wire mesh are 65 millimeters. If the required seawater flow rate is greater, two or three can be used in parallel.

When the sea-going air-conditioning system of the present invention is working, the air used in the air-conditioning cabin flows in through the return air inlet 1, and the fresh air flows in through the fresh air inlet 2, and two strands of air flow through the air filter 5 through the damper 3, and the filtered air Under the negative pressure of the fan 6, it flows through the fan 6 and enters the air cooler 7. Air cooler 7 is water-cooled, and refrigerant is natural subsurface deep cold sea water. The cold seawater passes through the finned tubes in the air cooler 7 from bottom to top, and the air crosses the outside of the finned tubes to fully absorb the cooling capacity of the cold seawater, and flows to the water baffle 9 while cooling down, and then flows through the air The distribution chamber 10 enters the air duct 11. When the air was cooled in the air cooler 7, a part of the moisture was condensed into water, which was left along the finned tubes. When passing through the water retaining plate 9, a part of the moisture also flowed down due to the tortuousness of the flow path. Both streams of condensed water are discharged through the drain pipe 8. The cold air flowing out in the air supply pipe 11 will be introduced into the air outlets of each compartment to play the role of air conditioning and cooling. The seawater introduced from the depth of the subsurface is pumped out by the seawater pump 12 through the water inlet valve 15, through the water outlet valve 13 and the seawater pipe 20, enters the air cooler 7 from the bottom, flows out of the air cooler 7 from the top, and is discharged into the sea.

When the flow rate measured on the flow/temperature measuring point 19 decreases significantly, it indicates that the deep water pipe 18 is blocked. The shallow water inlet valve 16 and the return valve 14 should be opened, and the water inlet valve 15 and the water outlet valve 13 should be closed. 17 sucks the seawater of shallow water depth, is pumped into deep water pipe 18 through return valve 14 by seawater pump 12, flows back to the subsurface depth of sea again. At this time, the seawater return process will flush the 18 pipe sections of the deep water pipe, so as to achieve the purpose of dredging the pipeline. After dredging, water inlet valve 15 and water outlet valve 13 are opened again, enter normal working state, and return valve 14 and shallow water inlet valve 16 are closed again, cut off return circuit.

Claims (5)

1. A sea-going air-conditioning system utilizing the cooling capacity of subsurface seawater, which consists of three parts: an air treatment device, a seawater delivery device and a seawater extraction device. The air treatment device includes a return air inlet (1), a fresh air inlet (2), a conditioning Damper (3), air mixing chamber (4), air filter (5), fan (6), air cooler (7), drain pipe (8), water baffle (9), air distribution chamber (10) and air supply pipe (11); the seawater conveying device comprises a seawater pump (12), a water outlet valve (13), a return valve (14), a water inlet valve (15), a shallow water inlet valve (16), a shallow water pipe (17 ), deep water pipe (18), flow/temperature measuring point (19) and seawater pipe (20); the seawater drawing device includes filter head (21), winch (22), roller shaft (23), clamp hoop (24) And the rubber tube (25), it is characterized in that, the air treatment device is a horizontal cylinder, its left end is juxtaposed with the return air inlet (1) and the fresh air inlet (2), along the flow direction of the air from left to right Install damper (3), air mixing chamber (4), air filter (5), fan (6), air cooler (7), water baffle (9), air distribution chamber (10), the right ends of which are juxtaposed There are several air supply pipes (11), wherein the air cooler (11) adopts a water-cooled type, and its refrigerant is cold seawater from the subsurface depth; the outlet of the seawater pump (12) passes through the water outlet valve (13), the seawater pipe (20 ) is connected to the bottom of the air cooler (7) in the air handling device, and the top of the air cooler (7) communicates with the sea; the inlet of the seawater pump (12) is connected to one end of the deep water pipe (18) through the water inlet valve (15) The seawater suction device is installed on the deck (26), and in the seawater suction device, the other end of the deep water pipe (18) is tightly connected with the rubber tube (25) by the clamp (24), and the rubber tube (25) passes through the roller shaft ( 23) twisted by the hoist (22), the end of the rubber tube (25) is connected with the screen head (21), and the screen head (21) is the suction port of the subsurface cold seawater. 2. The sea-ship air-conditioning system utilizing subsurface seawater cooling capacity according to claim 1, characterized in that the outlet of the seawater pump (12) in the seawater delivery device also passes through the return valve (14) and the deep water pipe (18) ) communicates with one end of the seawater pump (12), and the inlet of the seawater pump (12) also links to each other with the shallow water pipe (17) by the shallow water inlet valve (16), and the end of the shallow water pipe (17) is inserted into the depth of 2 meters in the seawater. 3. The sea-ship air-conditioning system utilizing the cooling capacity of subsurface seawater according to claim 1, characterized in that the rubber tube (25) is a rubber tube with a wire mesh inside, and can withstand a pressure of 3 MPa. (18) Seawater corrosion-resistant stainless steel pipes or cheap hot-dipped aluminized steel pipes can be selected. The nominal diameter of the deep water pipe (18) and the rubber pipe (25) is 65 mm. If the required seawater flow rate is larger, two pipes can be used. Or three in a row. 4. The marine air-conditioning system utilizing the cooling capacity of subsurface seawater according to claim 1, characterized in that a flow/temperature measuring point (19) is arranged in the seawater pipe (20) close to the outlet valve (13). 5. The sea-ship air-conditioning system utilizing subsurface seawater cooling capacity according to claim 1, characterized in that a certain distance is left between every adjacent two parts in the air handling device, as a buffer mixing space, fan (6 The inflow and outflow sections of ) are provided with a tapered transition pipe, and the lower edge of the air cooler (7) and the water baffle (9) is arranged with a water collection space and communicated with the drain pipe (8).

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