CN211792611U - Surface cooler precooling type indirect evaporative cooling air-conditioning system - Google Patents

Abstract

The utility model discloses a surface cooler precooling type indirect evaporative cooling air conditioning system, which comprises a water chilling unit, wherein the water chilling unit is connected with a plate type heat exchanger through a water pipe and forms a closed circulation channel, and the plate type heat exchanger is also connected with a back plate coil pipe of a data center through a liquid pipe and forms a closed circulation channel; the water chilling unit is also connected with a horizontal tube type air-air heat exchanger through an air pipe, and air in the horizontal tube type air-air heat exchanger is exhausted from an air outlet; the water chilling unit comprises a shell, a direct evaporation cooling unit is arranged in the shell, the two side structures of the direct evaporation cooling unit are symmetrical and the same, an air inlet unit, a coarse filter, a surface air cooler, an indirect evaporation cooling unit, a direct evaporation cooling unit, a centrifugal fan and an air outlet are sequentially arranged according to the air inlet direction, and the air outlet is connected with an air pipe. The utility model discloses indirect evaporative cooling air conditioning system utilizes evaporative cooling and ethylene glycol natural cooling technique, reduces the operation energy consumption, has solved the higher problem of current data center cooling system energy consumption.

Description

A surface cooler pre-cooling indirect evaporative cooling air conditioning system

technical field

The utility model belongs to the technical field of air-conditioning equipment, in particular to a surface cooler pre-cooling indirect evaporative cooling air-conditioning system.

Background technique

With the development of science, technology and economy and the improvement of people's material living standards, various industrial buildings have been built in large numbers. Especially in the field of data centers, with the growth of its number and scale, the energy consumption of data centers can not be ignored more and more. In the energy consumption composition of the data center, the energy consumption of the air conditioning system accounts for 30%-50% of the total energy consumption of the data center. The traditional mechanical refrigeration chiller is used for separate cooling, which consumes a lot of electricity and has high operation and maintenance costs. Therefore, air conditioning The system is the key link in improving energy efficiency of the current data center.

Evaporative cooling technology is a green energy-saving technology that utilizes water evaporation and heat absorption. It uses water as a refrigerant, without a compressor, and exchanges heat and moisture between air and water through direct or indirect contact between air and water to produce cold air or air. Cold water, in line with the green and sustainable development policy.

Utility model content

The purpose of the utility model is to provide a surface cooler pre-cooling indirect evaporative cooling air-conditioning system, which solves the problems of high energy consumption and high operation and maintenance cost of the existing air-conditioning system for data centers.

The technical scheme adopted by the utility model is that a surface cooler pre-cooling indirect evaporative cooling air-conditioning system includes a chiller unit, the chiller unit is connected with a plate heat exchanger through a water pipe to form a closed circulation channel, and the plate heat exchanger also passes through The liquid pipe is connected to the backplane coil of the data center and forms a closed circulation channel; the chiller is also connected to the horizontal pipe type air-to-air heat exchanger at the top of the data center through the air pipe, and the air of the horizontal pipe type air-to-air heat exchanger discharged from the exhaust port;

The chiller includes a shell, and a direct evaporative cooling unit is arranged in the shell. The structures on both sides of the direct evaporative cooling unit are symmetrical and identical. Specifically, according to the air intake direction, an air intake unit, a coarse filter, a surface cooler, and an indirect evaporative cooling unit are arranged in sequence. Cooling unit, direct evaporative cooling unit, centrifugal fan and air outlet, the air outlet is connected with the air duct.

The utility model is also characterized in that,

An exhaust fan is arranged at the exhaust port.

The air inlet unit is provided with an air inlet b, a baffle plate and an air inlet a in sequence from top to bottom.

The indirect evaporative cooling unit includes a plate-and-tube indirect evaporative cooler a located on the upper part of the shell. The top of the plate-and-tube indirect evaporative cooler a is sequentially provided with a water distribution device a, a water baffle a, an exhaust fan a and an exhaust fan a from bottom to top. tuyere a;

The plate-and-tube indirect evaporative cooler a has a water storage tank a at the bottom, and the water distribution device a and the water storage tank a are connected through a water supply pipe a.

A circulating water pump a is arranged on the water supply pipe a, and a floating ball valve a is arranged in the water storage tank a.

The direct evaporative cooling unit includes a filler, and the top of the filler is sequentially provided with a water distribution device c, a glycol coil, a water baffle c, an exhaust fan c and an exhaust port c from bottom to top;

A water storage tank c is arranged at the top and bottom of the packing, and the water distribution device c is connected with the water storage tank c through the water supply pipe c;

The surface cooler is connected to the water storage tank c through the unit water supply pipe and the unit return pipe to form a closed circulation pipeline; the unit water supply pipe and the unit return pipe are respectively connected to the plate heat exchanger through the water pipe and form a closed circulation channel.

The filler is in the shape of a "V".

Gate valves are arranged on the water supply pipe c in sequence, and a circulating water pump c is also arranged on the water supply pipe of the unit.

A floating ball valve b is arranged in the water storage tank c.

The beneficial effects of the present utility model are:

(1) The indirect evaporative cooling air-conditioning system of the present utility model can be used in a variety of modes, and various cold and heat source modes such as direct-indirect evaporative cooling and ethylene glycol natural cooling are adopted to improve the stability of the refrigeration performance of the evaporative cooling chiller, Low operating cost, energy saving, reliable, safe and stable;

(2) The indirect evaporative cooling air-conditioning system of the present utility model adopts the ethylene glycol coil, which can be switched to the ethylene glycol free cooling mode in winter in cold regions to avoid the freezing problem of water pipes in winter;

(3) The indirect evaporative cooling air-conditioning system of the present utility model adopts the surface cooler to pre-cool fresh air. After the primary air enters the surface cooler and is pre-cooled, it enters the inside of the plate-and-tube indirect evaporative cooler a; After pre-cooling in the surface cooler, it swept over the outside of the plate tube of the plate-and-tube indirect evaporative cooler a from bottom to top, and exchanged heat and moisture with the water film on the outer wall of the plate tube to further reduce the temperature of the primary air outside and inside, and also Effectively reduce the temperature of secondary air exhaust;

(4) In the indirect evaporative cooling air conditioning system of the present utility model, the packing adopts a combined packing. The combined packing is arranged in two layers, the upper layer is a cube material, and the lower layer is a "V"-shaped packing, which not only increases the volume of the packing and increases the size of the packing. At the same time, the space below the unit is effectively used, and the height of the unit is effectively reduced on the premise of ensuring the height of the filler.

Description of drawings

1 is a schematic structural diagram of a surface cooler pre-cooling indirect evaporative cooling air-conditioning system of the present invention;

Figure 2 is a schematic structural diagram of a chiller in a surface cooler pre-cooling indirect evaporative cooling air conditioning system of the present invention.

In the figure, 1. Air inlet a, 2. Coarse filter, 3. Surface cooler, 4. Circulating water pump a, 5. Water storage tank a, 6. Float valve a, 7. Water supply pipe a, 8. Plate Tubular indirect evaporative cooler a, 9. Water supply pipe c, 10. Gate valve, 11. Water storage tank c, 12. Packing, 13. Baffle plate, 14. Air inlet b, 15. Water distribution device a, 16. Block Water plate a, 17. Exhaust fan a, 18. Exhaust port a, 19. Water distribution device c, 20. Glycol coil, 21. Water baffle c, 22. Exhaust fan c, 23. Air exhaust port c, 24. Centrifugal fan, 25. Air outlet, 26. Unit return pipe, 27. Unit water supply pipe, 28. Plate heat exchanger, 29. Back plate coil, 30. Horizontal tube type air-to-air heat exchanger , 31. Exhaust fan, 32. Air outlet, 33. Liquid pipe, 34. Circulating water pump c, 35. Float valve b.

Detailed ways

The present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

The utility model is a surface cooler pre-cooling indirect evaporative cooling air conditioning system, as shown in FIG. 1 , including a chiller unit, the chiller unit is connected with the plate heat exchanger 28 through a water pipe and forms a closed circulation channel, and the plate heat exchanger 28 also The liquid pipe 33 is connected to the backplane coil 29 of the data center and forms a closed circulation channel; the chiller is also connected to the horizontal pipe type air-to-air heat exchanger 30 located at the top of the data center through an air pipe, and the horizontal pipe type air-to-air exchange The air of the heater 30 is discharged from the air outlet 32;

As shown in Figure 2, the chiller includes a casing, and a direct evaporative cooling unit is arranged in the casing. The structures on both sides of the direct evaporative cooling unit are symmetrical and identical. Specifically, the air inlet unit and the coarse filter 2 are arranged in sequence according to the air inlet direction. , Surface cooler 3, indirect evaporative cooling unit, direct evaporative cooling unit, centrifugal fan 24 and air outlet 25, the air outlet 25 is connected with the air duct. The exhaust air of the direct evaporative cooling unit and the exhaust air of the indirect evaporative cooling unit are uniformly exhausted from the air outlet 25 .

An exhaust fan 31 is provided at the exhaust port 32 .

The air inlet unit is provided with an air inlet b14, a baffle 13 and an air inlet a1 in sequence from top to bottom. The primary air enters the air inlet b14 to form a primary air channel; the air inlet a1 enters the secondary air to form a secondary air channel.

The indirect evaporative cooling unit includes a plate-and-tube indirect evaporative cooler a8 located on the upper part of the shell. The top of the plate-and-tube indirect evaporative cooler a8 is sequentially provided with a water distribution device a15, a water baffle a16, an exhaust fan a17 and an exhaust fan from bottom to top. tuyere a18;

The plate-and-tube indirect evaporative cooler a8 is provided with a water storage tank a5 at the bottom, and the water distribution device a15 and the water storage tank a5 are connected by a water supply pipe a7, and a valve is provided on the water supply pipe a7.

The water supply pipe a7 is provided with a circulating water pump a4, and the water storage tank a5 is provided with a floating ball valve a6.

The direct evaporative cooling unit includes a filler 12, and the top of the filler 12 is sequentially provided with a water distribution device c19, a glycol coil 20, a water baffle c21, an exhaust fan c22 and an exhaust port c23 from bottom to top;

A water storage tank c11 is provided on the top and bottom of the packing 12, and the water distribution device c19 is connected with the water storage tank c11 through a water supply pipe c9;

The surface cooler 3 is connected to the water storage tank c11 through the unit water supply pipe 27 and the unit return pipe 26 to form a closed circulation pipeline; the unit water supply pipe 27 and the unit return pipe 26 are respectively connected to the plate heat exchanger 28 through water pipes and form a closed circulation channel .

The filler 12 is in the shape of "V", which can increase the contact area and speed up the heat exchange rate.

A gate valve 10 is arranged on the water supply pipe c9 in sequence, and a circulating water pump c34 is also arranged on the water supply pipe 27 of the unit.

A float valve b35 is provided in the water storage tank c11.

The working principle of a surface cooler pre-cooling indirect evaporative cooling air-conditioning system of the present invention:

The outdoor fresh air enters the shell from the upper air duct air inlet a1 and the lower air duct air inlet b14, and is filtered by the coarse filter 2, and the primary air in the upper air duct is pre-cooled in the surface cooler 3 and then enters the indirect evaporative cooling device. The secondary air in the lower air duct is pre-cooled in the surface cooler 3 and passes from bottom to top to the outside of the plate tube a8 of the indirect evaporative cooling device, and exchanges heat and moisture with the water film on the outer wall of the plate tube and is discharged from the exhaust port a18. The air enters the direct evaporative cooling unit, exchanges heat and moisture with water in the filler 12, and is discharged through the air outlet c23.

The cold water produced by the unit is divided into two parts: one part is sent to the plate heat exchanger 28 for heat exchange; the other part is sent to the surface cooler 3 in the pre-cooling section of the unit; the return water after absorbing heat is sent to the return water pipe 26 of the unit. Enter the water distribution device c19 of the unit for spraying.

The exhaust air of the unit is sent to the horizontal tube air-to-air heat exchanger 30 at the top of the data room, and is discharged from the air outlet 32 by the exhaust fan 31 after heat exchange with the air in the room.

When the outdoor dry bulb temperature is lower than 3°C in winter, run the glycol natural cooling mode. In order to prevent the unit from freezing and cracking, the spray water system stops working, and the outdoor cold air is fully utilized to cool the glycol solution in the glycol coil 20. , the cooled ethylene glycol solution is passed into the plate heat exchanger 28 to exchange heat with the back plate coil 29 . The outdoor fresh air is filtered and sent to the air-to-air heat exchanger 30 in the horizontal pipe to exchange heat with the indoor air of the machine room.

The indirect evaporative cooling air conditioning system of the utility model utilizes the evaporative cooling and ethylene glycol natural cooling technology to reduce the operation energy consumption and solve the problem of high energy consumption of the existing data center cooling system.

Claims (9)

1. The surface cooler pre-cooling type indirect evaporative cooling air conditioning system is characterized by comprising a water chilling unit, wherein the water chilling unit is connected with a plate type heat exchanger (28) through a water pipe and forms a closed circulation channel, and the plate type heat exchanger (28) is also connected with a back plate coil (29) of a data center through a liquid pipe (33) and forms a closed circulation channel; the water chilling unit is also connected with a horizontal pipe type air-air heat exchanger (30) positioned at the top of the data center through an air pipe, and air of the horizontal pipe type air-air heat exchanger (30) is exhausted from an air outlet (32);

the water chilling unit comprises a shell, a direct evaporation cooling unit is arranged in the shell, the two sides of the direct evaporation cooling unit are symmetrical and identical in structure, an air inlet unit, a coarse filter (2), a surface air cooler (3), an indirect evaporation cooling unit, a direct evaporation cooling unit, a centrifugal fan (24) and an air outlet (25) are sequentially arranged according to the air inlet direction, and the air outlet (25) is connected with an air pipe.

2. Surface cooler pre-cooling type indirect evaporative cooling air conditioning system according to claim 1, wherein an exhaust fan (31) is arranged at the exhaust outlet (32).

3. The surface cooler pre-cooling type indirect evaporative cooling air conditioning system as recited in claim 1, wherein the air inlet unit is provided with an air inlet b (14), a baffle (13) and an air inlet a (1) from top to bottom in sequence.

4. The surface cooler pre-cooling type indirect evaporative cooling air conditioning system as recited in claim 1, wherein the indirect evaporative cooling unit comprises a plate-tube type indirect evaporative cooler a (8) positioned at the upper part of the shell, and a water distribution device a (15), a water baffle a (16), an exhaust fan a (17) and an exhaust outlet a (18) are sequentially arranged at the top of the plate-tube type indirect evaporative cooler a (8) from bottom to top;

the plate-tube indirect evaporative cooler a (8) is provided with a water storage tank a (5) at the bottom, and the water distribution device a (15) is connected with the water storage tank a (5) through a water supply pipe a (7).

5. A surface cooler pre-cooling type indirect evaporative cooling air conditioning system as claimed in claim 4, wherein the water supply pipe a (7) is provided with a circulating water pump a (4), and the water storage tank a (5) is provided with a float valve a (6).

6. The surface cooler pre-cooling type indirect evaporative cooling air conditioning system as recited in claim 1, wherein the direct evaporative cooling unit comprises a filler (12), and a water distribution device c (19), a glycol coil pipe (20), a water baffle c (21), an exhaust fan c (22) and an exhaust outlet c (23) are sequentially arranged on the top of the filler (12) from bottom to top;

the bottom of the top of the filler (12) is provided with a water storage tank c (11), and the water distribution device c (19) is connected with the water storage tank c (11) through a water supply pipe c (9);

the surface cooler (3) is connected with the water storage tank c (11) through a unit water supply pipe (27) and a unit water return pipe (26) to form a closed circulating pipeline; the unit water supply pipe (27) and the unit water return pipe (26) are respectively connected with the plate heat exchanger (28) through water pipes to form a closed circulation channel.

7. Surface cooler pre-cooling indirect evaporative cooling air conditioning system according to claim 6, wherein the packing (12) is "V" shaped.

8. A surface cooler pre-cooling type indirect evaporative cooling air conditioning system as claimed in claim 6, wherein the water supply pipe c (9) is sequentially provided with a gate valve (10), and the unit water supply pipe (27) is further provided with a circulating water pump c (34).

9. A surface cooler pre-cooling type indirect evaporative cooling air conditioning system as claimed in claim 6, wherein a float valve b (35) is arranged in the water storage tank c (11).

Images