CN214249911U - Novel regional concentrated cooling system - Google Patents
Novel regional concentrated cooling system Download PDFInfo
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- CN214249911U CN214249911U CN202022464076.3U CN202022464076U CN214249911U CN 214249911 U CN214249911 U CN 214249911U CN 202022464076 U CN202022464076 U CN 202022464076U CN 214249911 U CN214249911 U CN 214249911U
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Abstract
The embodiment of the utility model provides a novel regional cold supply system that concentrates, include: the bypass pipe, the first valve, the fourth water return pipe and the third valve; one end of a fourth water return pipe is connected to the cold end outlet of the first plate type heat exchange plate, and the other end of the fourth water return pipe is connected to the cold end inlet of the second plate type heat exchange plate; one end of the bypass pipe is connected to the fourth water return pipe, and the other end of the bypass pipe is connected to a water outlet of the multi-way valve; the first valve is mounted on the bypass pipe; the temperature that makes the second wet return can be controlled about 10 ℃, the utility model discloses a water of second plate heat exchanger hot junction export gets into fan-coil unit heat transfer back, makes the indoor minimum temperature of the highest floor or the bottom of building satisfy user's demand.
Description
Technical Field
The utility model relates to the technical field of cooling system especially involves a novel regional cold supply system that concentrates.
Background
The regional cooling is a cooling mode of providing a refrigerant to units needing cooling in a certain range by utilizing a large-scale regional energy source cooling station which is arranged in a centralized manner, cold energy is produced by the regional energy source cooling station by taking chilled water as a carrier, the cold energy is conveyed to office buildings, industrial buildings and residential buildings through pipelines buried underground, and heat of indoor air is taken away through air conditioning equipment such as an air cabinet or a coil fan.
The application number is CN201821674079.6, and a regional centralized cooling and heating system is disclosed, wherein a regional energy station is connected with a cold source inlet of a first plate heat exchanger through a first water supply pipe, and a cold source outlet of the first plate heat exchanger is connected with a cold source inlet of a second plate heat exchanger through a first return pipe; a heat source inlet of the first plate heat exchanger is connected with the fresh air fan through a second water supply pipe, and a heat source outlet of the first plate heat exchanger is connected with the fresh air fan through a second water return pipe; a heat source inlet of the second plate heat exchanger is connected with the fan coil unit through a third water supply pipe, and a heat source outlet of the second plate heat exchanger is connected with the fan coil unit through a third water return pipe; and a cold source outlet of the second plate heat exchanger is connected with the regional energy station through a fourth water return pipe. The temperature of the cold source after the primary energy utilization is just the temperature of the cold source required by the second plate heat exchanger.
However, the above patent document has a drawback that the temperature at the hot end outlet of the second plate heat exchanger is about 12 ℃, and in reality, the pipe is long, and it is unavoidable that the gas in the pipe exchanges heat with the external substance, so that the temperature of the gas in the pipe is high, and the indoor minimum temperature reaching the lowest floor or the highest floor of the whole building is too high, and the requirement of the user cannot be met.
SUMMERY OF THE UTILITY MODEL
The terms of art referred to in this case are explained as follows:
fan-coil unit: referred to as fan coil. It is one of the end devices of air conditioning system composed of small fan, motor and coil pipe (air heat exchanger). When chilled water or hot water flows through the coil pipes, heat is exchanged with air outside the pipes, so that the air is cooled, dehumidified or heated to adjust indoor air parameters. It is a common cold and heat supply end device.
Plate heat exchanger: the heat exchange equipment separates two systems, and the heat exchange of two normal media is 4 ports:
a hot end inlet: a thermal medium inlet;
a hot end outlet: the heat medium is discharged after heat exchange;
a cold end inlet: a cold source inlet;
a cold end outlet: and an outlet after heat exchange of the cold source.
The utility model provides a novel regional cold supply system that concentrates, the purpose is in order to solve "reach the indoor minimum temperature of lower floor or highest floor still on the high side, can't satisfy the problem of user's demand". In order to achieve the above purpose, the utility model adopts the following technical scheme:
a novel zone concentrated cooling system comprising: the system comprises a regional energy station, a multi-way valve, a first water outlet pipe, a first plate type heat exchanger, a first water return pipe, a second water supply pipe, a second water return pipe, a third water supply pipe, a second plate type heat exchanger and a third water return pipe; a water inlet of the multi-way valve is connected to a water outlet pipe of the regional energy station, and the first water outlet pipe, the first water return pipe and the second water supply pipe are all connected to the first plate heat exchanger; and the second water return pipe, the third water supply pipe and the third water return pipe are all connected to the second plate heat exchanger.
Further comprising: the bypass pipe, the first valve, the fourth water return pipe and the third valve; one end of a fourth water return pipe is connected to the cold end outlet of the first plate type heat exchanger, and the other end of the fourth water return pipe is connected to the cold end inlet of the second plate type heat exchanger; one end of the bypass pipe is connected to the fourth water return pipe, and the other end of the bypass pipe is connected to a water outlet of the multi-way valve; the first valve is mounted on the bypass pipe; and the third valve is arranged on the fourth water return pipe.
Furthermore, the air conditioner also comprises a plurality of fresh air fans, and each fresh air fan is connected between the second water return pipe and the third water supply pipe in parallel through a branch pipe.
Further, the fan-coil unit is a dry coil.
Furthermore, the system also comprises a plurality of fan coil units; each fan coil unit is connected in parallel between the first water return pipe and the second water supply pipe through a branch pipe.
Compared with the prior art, the utility model has the following advantages;
the utility model provides a novel regional centralized cooling system, one end of a bypass pipe is connected with a fourth water return pipe, and the other end of the bypass pipe is connected with a water outlet of a multi-way valve; the first valve is mounted on the bypass pipe; the temperature that makes the second wet return can be controlled about 10 ℃, the utility model discloses a water of second plate heat exchanger hot junction export and fan-coil unit's air conduit heat transfer back make the indoor minimum temperature who reachs the highest floor or the bottommost layer of building satisfy user's demand.
In addition to the technical problems addressed by the present invention, the technical features constituting the technical solutions, and the advantages brought by the technical features of the technical solutions described above, the present invention provides other technical problems that can be solved, other technical features included in the technical solutions, and advantages brought by the technical features, and further detailed descriptions will be made in the detailed description of the embodiments.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.
Fig. 1 is a schematic connection diagram of a novel area centralized cooling system according to a first embodiment of the present invention;
fig. 2 is a schematic connection diagram of a novel area centralized cooling system according to a second embodiment of the present invention;
fig. 3 is a schematic connection diagram of a novel area centralized cooling system according to a third embodiment of the present invention.
Reference numerals:
1. a regional energy source station; 2. a multi-way valve; 3. a first water outlet pipe; 4. a first plate heat exchanger; 5. a fan coil unit; 6. a first water return pipe; 7. a second water supply pipe; 8. a second water return pipe; 9. a third water supply pipe; 10. a fresh air machine; 11. a second plate heat exchanger; 12. a third water return pipe; 13. a fourth water outlet pipe; 14. A first valve; 15. a second valve; 16. a bypass pipe; 17. a fourth water return pipe; 18. a third valve; 19. a fifth water return pipe; 20. a sixth water return pipe; 21. a fourth plate heat exchanger; 22. a fifth plate heat exchanger; 23. A third plate heat exchanger.
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail with reference to the accompanying drawings. It is obvious that the described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.
Example one
Referring to fig. 1, an embodiment of the present invention provides a novel area centralized cooling system, including: the system comprises a regional energy station 1, a multi-way valve 2, a first water outlet pipe 3, a first plate type heat exchanger 4, a first water return pipe 6, a second water supply pipe 7, a second water return pipe 8, a third water supply pipe 9, a second plate type heat exchanger 11 and a third water return pipe 12; a water inlet of the multi-way valve 2 is connected to a water outlet pipe of the regional energy station 1, one end of a first water outlet pipe 3 is connected to a water outlet of the multi-way valve 2, and the other end of the first water outlet pipe 3 is connected to a cold end inlet of the first plate heat exchanger 4; one end of the second water supply pipe 7 is connected to a hot end water inlet of the first plate heat exchanger 4, and one end of the first water return pipe 6 is connected to a hot end water outlet of the first plate heat exchanger 4; one end of a third water supply pipe 9 is connected to a hot end water inlet of the second plate heat exchanger 11, one end of a second water return pipe 8 is connected to a hot end water outlet of the second plate heat exchanger 11, one end of a third water return pipe 12 is connected to a cold end water outlet of the second plate heat exchanger 11, and the other end of the third water return pipe 12 is connected to a water inlet of the regional energy station 1.
It should be noted that, the water supply pipe and the water outlet pipe connected with the multi-way valve 2 are all provided with a valve, a thermometer and a flowmeter, and the opening degree of the valve is adjusted by observing the change of the thermometer and the flowmeter, so that the flow and the temperature of the water supplied from the multi-way valve 2 to the first plate heat exchanger 4 can be adjusted.
As shown in fig. 1, the method further includes: a bypass pipe 16, a first valve 14, a fourth return pipe 17, and a third valve 18; one end of a fourth water return pipe 17 is connected to the cold end outlet of the first plate heat exchanger 4, and the other end of the fourth water return pipe 17 is connected to the cold end inlet of the second plate heat exchanger 11; one end of a bypass pipe 16 is connected to the fourth water return pipe 17, and the other end of the bypass pipe 16 is connected to a water outlet of the multi-way valve 2; the first valve 14 is mounted on the bypass line 16; a third valve 18 is installed on the fourth return pipe.
It should be noted that the third valve 18 may be installed in the position shown in FIG. 1; the third valve 18 can also be arranged on the right side of the bypass pipe 16, so that water in the regional energy station can sequentially pass through the multi-way valve 2 and the bypass pipe 16 and simultaneously flow into the cold end inlet of the second plate heat exchanger 11 with water at the cold end outlet of the first plate heat exchanger 4, the temperature of the cold end water inlet reaching the second plate heat exchanger 11 is about 7 ℃, the temperature of the fresh air fan 10 reaching the indoor is lower, and the use effect is better.
The following two control modes are realized by controlling the first valve 14 and the third valve 18
In the first mode, when the first valve 14 is closed and the third valve 18 is opened, the chilled water of 5 ℃ coming out of the regional energy station 1 enters the first plate heat exchanger 4 to exchange heat with the fresh air fan 10, the water temperature in the second water supply pipe 7 is about 12 ℃, and the water temperature in the first water return pipe 6 is about 7 ℃. The temperature of the chilled water flowing into the fourth water return pipe 17 from the outlet of the cold end of the first plate heat exchanger 4 is about 10 ℃, the chilled water enters the second plate heat exchanger 11 to exchange heat with the fan-coil unit 5, the temperature of the chilled water in the third water supply pipe 9 is about 19 ℃, and the temperature of the chilled water in the second water return pipe 8 is about 12 ℃. At this time, the temperature in the third water returning pipe 12 is about 17 ℃. The temperature difference of the whole tail end system reaches 12 ℃.
In the second mode, when the first valve 14 and the third valve 18 are opened, the fourth water return pipe 17 is communicated with the water outlet of the multi-way valve 2 through the bypass pipe 16, at this time, the water temperature in the bypass pipe 16 is 5 ℃ which is the water temperature of the regional energy source station, the water temperature flowing into the cold end of the second plate heat exchanger 11 in parallel is about 7 ℃, and the water temperature flowing out of the cold end of the third plate heat exchanger 23 is about 13 ℃. Through the mode, the temperature of the cold end reaching the second plate heat exchanger 11 is 7 ℃, and compared with the temperature of the cold end reaching the second plate heat exchanger 11 in the first mode, the transfer effect is better.
Further, the system also comprises a plurality of fresh air fans 10, and each fresh air fan 10 is connected between the second water return pipe 8 and the third water supply pipe 9 in parallel through a branch pipe. The temperature of the air coming out of the fresh air machine 10 reaches the indoor temperature, and the fresh air is injected.
Further, the system also comprises a plurality of fan coil units 5; each fan-coil unit 5 is connected in parallel between a first water return pipe 6 and a second water supply pipe 7 through a branch pipe. The fan-coil unit 5 is a dry coil. Dry coils are devices used to provide cooling or heating to the return air in the room. The dry coil is for the purpose of "dry".
One end of a bypass pipe 16 is connected to the fourth water return pipe 17, and the other end of the bypass pipe 16 is connected to a water outlet of the multi-way valve 2; the first valve 14 is mounted on the bypass line 16; a third valve 18 is installed on the fourth return pipe. The temperature that makes second wet return 8 can be controlled about 10 ℃, the utility model discloses a water of second plate heat exchanger hot junction export and fan-coil unit's air conduit heat transfer back make the indoor minimum temperature who reachs the highest floor or the bottommost layer of building satisfy user's demand.
Example two
Referring to fig. 2, an embodiment of the present invention provides a novel area centralized cooling system, including: the system comprises a regional energy station 1, a multi-way valve 2, a first water outlet pipe 3, a first plate type heat exchanger 4, a first water return pipe 6, a second water supply pipe 7, a second water return pipe 8, a third water supply pipe 9, a second plate type heat exchanger 11 and a third water return pipe 12; a water inlet of the multi-way valve 2 is connected to a water outlet pipe of the regional energy station 1, one end of a first water outlet pipe 3 is connected to a water outlet of the multi-way valve 2, and the other end of the first water outlet pipe 3 is connected to a cold end inlet of the first plate heat exchanger 4; one end of the second water supply pipe 7 is connected to a hot end water inlet of the first plate heat exchanger 4, and one end of the first water return pipe 6 is connected to a hot end water outlet of the first plate heat exchanger 4; one end of a third water supply pipe 9 is connected to a hot end water inlet of the second plate heat exchanger 11, one end of a second water return pipe 8 is connected to a hot end water outlet of the second plate heat exchanger 11, one end of a third water return pipe 12 is connected to a cold end water outlet of the second plate heat exchanger 11, and the other end of the third water return pipe 12 is connected to a water inlet of the regional energy station 1.
It should be noted that, the water supply pipe and the water outlet pipe connected with the multi-way valve 2 are all provided with a valve, a thermometer and a flowmeter, and the opening degree of the valve is adjusted by observing the change of the thermometer and the flowmeter, so that the flow and the temperature of the water supplied from the multi-way valve 2 to the first plate heat exchanger 4 can be adjusted.
As shown in fig. 2, the method further includes: a fourth water outlet pipe 13, a first valve 14, a second valve 15, a fourth water return pipe 17, a third valve 18, a fifth water return pipe 19 and a sixth water return pipe 20; one end of a fourth water return pipe 17 is connected to the cold end outlet of the first plate heat exchanger, the other end of the fourth water return pipe 17 is connected to the cold end inlet of the second plate heat exchanger, a bypass pipe 16 connected in parallel is arranged on the fourth water return pipe 17, one end of the bypass pipe 16 is connected to the fourth water return pipe 17 close to the first plate heat exchanger 4, and the other end of the bypass pipe 16 is connected to the hot end inlet of the third plate heat exchanger plate 23; one end of a fifth water outlet pipe is connected to the hot end outlet of the third plate type heat exchange plate 23, and the other end of the fifth water outlet pipe is connected to a fourth water return pipe 17 close to the second plate type heat exchanger 11; one end of a fourth water outlet pipe 13 is connected to the water outlet of the multi-way valve 2, and the other end of the fourth water outlet pipe 13 is connected to the cold end inlet of the third plate type heat exchange plate 23; one end of a sixth water return pipe 20 is connected to the outlet of the cold end of the third plate type heat exchange plate 23, and the other end of the sixth water return pipe 20 is connected to the water inlet of the regional energy station 1; the first valve 14 is arranged on the fourth water outlet pipe 13; the second valve 15 is mounted on the bypass pipe 16; a third valve 18 is installed on the fourth water return pipe 17 between the bypass pipe 16 and the fifth water return pipe 19.
It should be noted that the first valve 14 is used for controlling the water flow of the fourth water outlet pipe 13. The second valve 15 is used to control the flow of water through the bypass line 16. The third valve 18 is used to control the flow of water through the fourth water return pipe 17, and the third valve 18 is installed as shown in FIG. 2. The first valve 14, the second valve 15, and the third valve 18 are of any type of butterfly valve, ball valve, solenoid valve, or shutoff valve.
Further, the system also comprises a plurality of fresh air fans 10, and each fresh air fan 10 is connected between the second water return pipe 8 and the third water supply pipe 9 in parallel through a branch pipe. The temperature of the air coming out of the fresh air machine 10 reaches the indoor temperature, and the fresh air is injected.
Further, the system also comprises a plurality of fan coil units 5; each fan-coil unit 5 is connected in parallel between a first water return pipe 6 and a second water supply pipe 7 through a branch pipe. The fan-coil unit 5 is a dry coil. Dry coils are devices used to provide cooling or heating to the return air in the room. The dry coil is for the purpose of "dry".
The following two ways are realized by adjusting the first valve 14, the second valve 15 and the third valve 18:
in the first mode, when the first valve 14 and the second valve 15 are closed and the third valve 18 is fully opened, the chilled water of 5 ℃ coming out of the regional energy station 1 enters the first plate heat exchanger 4 to exchange heat with the fresh air fan 10, the water temperature in the second water supply pipe 7 is about 12 ℃, and the water temperature in the first water return pipe 6 is about 7 ℃. The temperature of the chilled water flowing into the fourth water return pipe 17 from the outlet of the cold end of the first plate heat exchanger 4 is about 10 ℃, the chilled water enters the second plate heat exchanger 11 to exchange heat with the fan-coil unit 5, the temperature of the chilled water in the third water supply pipe 9 is about 19 ℃, and the temperature of the chilled water in the second water return pipe 8 is about 12 ℃. At this time, the temperature in the third water returning pipe 12 is about 17 ℃. The temperature difference of the whole tail end system reaches 12 ℃.
In the second mode, when the first valve 14 and the second valve 15 are all opened and the third valve 18 is closed, the water temperature of the water entering the cold end inlet of the third plate heat exchanger 23 through the communication between the fourth water return pipe 17 and the bypass pipe 16 is about 10 ℃, and the water temperature of the water entering the hot end inlet of the third plate heat exchanger 23 through the fourth water return pipe 17 is about 5 ℃; the temperature of the water flowing into the cold end of the second plate heat exchanger 11 from the hot end outlet of the third plate heat exchange plate 23 through the sixth water return pipe 20 is about 7 ℃, and the temperature of the water flowing out of the cold end of the third plate heat exchange plate 23 is about 13 ℃. Through the mode, the temperature of the cold end reaching the second plate heat exchanger 11 is 7 ℃, and compared with the temperature of the cold end reaching the second plate heat exchanger 11 in the first mode, the transfer effect is better.
Through setting up third plate heat exchanger plate 23, parallelly connected bypass pipe 16 on fourth wet return 17 and the fourth outlet pipe 20 of connection between the cold junction import of 2 exports of multi-way valve and third plate heat exchanger 23, make the temperature of second wet return 8 can control about 10 ℃, the utility model discloses a water of 11 hot junction exports of second plate heat exchanger and fan-coil unit 5's air heat transfer back, make the indoor minimum temperature of reacing the building satisfy user's demand.
EXAMPLE III
The third embodiment further includes a fourth plate heat exchanger 21 and a fifth plate heat exchanger 22, which are different from the second embodiment. The fourth plate heat exchanger 21 and the fifth plate heat exchanger 22 are connected in the manner shown in fig. 2. Again, this is not described in more detail.
It should be noted that: the other end of the sixth water return pipe 20 is connected to the third water return pipe 12 close to the second plate heat exchanger 11. The other end of the third water return pipe 12 is connected to a cold end water inlet of the fourth plate heat exchanger 21.
In the third embodiment, the problem of insufficient energy utilization on the basis of the second embodiment is solved. By arranging the fourth plate heat exchanger 21 and the fifth plate heat exchanger 22, the temperature of the water coming out of the cold end of the fourth plate heat exchanger 21 is about 19 ℃, and the temperature of the water coming out of the hot end of the fourth plate heat exchanger 21 is about 14 ℃. The full gradient utilization of heat is achieved, and the energy-saving benefit is remarkable in energy transmission and utilization links.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (4)
1. A novel zone concentrated cooling system comprising: the system comprises a regional energy station (1), a multi-way valve (2), a first water outlet pipe (3), a first plate type heat exchanger (4), a first water return pipe (6), a second water supply pipe (7), a second water return pipe (8), a third water supply pipe (9), a second plate type heat exchanger (11) and a third water return pipe (12); a water inlet of the multi-way valve (2) is connected to a water outlet pipe of the regional energy station (1), and the first water outlet pipe (3), the first water return pipe (6) and the second water supply pipe (7) are all connected to the first plate heat exchanger (4); the second water return pipe (8), the third water supply pipe (9) and the third water return pipe (12) are all connected to the second plate heat exchanger (11); it is characterized by also comprising: a bypass pipe (16), a first valve (14), a fourth return pipe (17), and a third valve (18); one end of the fourth water return pipe (17) is connected to the cold end outlet of the first plate heat exchanger (4), and the other end of the fourth water return pipe (17) is connected to the cold end inlet of the second plate heat exchanger (11); one end of the bypass pipe (16) is connected to the fourth water return pipe (17), and the other end of the bypass pipe (16) is connected to a water outlet of the multi-way valve (2);
the first valve (14) is mounted on the bypass pipe (16);
the third valve (18) is installed on the fourth water return pipe (17).
2. A novel area concentrated cooling system as claimed in claim 1, wherein: the water supply system also comprises a plurality of fresh air fans (5), and each fresh air fan (5) is connected in parallel between the second water return pipe (8) and the third water supply pipe (9) through a branch pipe.
3. A novel area concentrated cooling system as claimed in claim 2, wherein: the fan-coil unit is characterized by further comprising a fan-coil unit (10), wherein the fan-coil unit (10) is a dry coil.
4. A novel area concentrated cooling system as claimed in claim 1, wherein: also includes a plurality of fan coil units (10); and each fan coil unit (10) is connected in parallel between the first water return pipe (6) and the second water supply pipe (7) through a branch pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022464076.3U CN214249911U (en) | 2020-10-30 | 2020-10-30 | Novel regional concentrated cooling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022464076.3U CN214249911U (en) | 2020-10-30 | 2020-10-30 | Novel regional concentrated cooling system |
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| Publication Number | Publication Date |
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| CN214249911U true CN214249911U (en) | 2021-09-21 |
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| CN202022464076.3U Active CN214249911U (en) | 2020-10-30 | 2020-10-30 | Novel regional concentrated cooling system |
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| CN (1) | CN214249911U (en) |
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- 2020-10-30 CN CN202022464076.3U patent/CN214249911U/en active Active
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