Chilled water energy-saving operation system

Abstract

The utility model discloses a chilled water energy-saving operation system, which relates to the field of chilled water use and comprises a water chilling unit and a cooling tower connected with the water chilling unit through a cooling pipeline, a cooling pump is mounted on the cooling pipeline, and the water chilling unit is respectively connected with each piece of cooling equipment through a water supply pipe and a water return pipe. A valve VI is mounted on the water supply pipe close to the cold using equipment side; a valve V, a valve II, a cold water tank, a freezing pump and a valve VII are sequentially mounted on the water return pipe from the cold using equipment side; by arranging the freezing water tank, reasonably arranging a freezing water circulating pipeline and configuring a corresponding self-control valve, the same set of unit can have a cold storage function, the freezing water tank is used as a carrier of a refrigerant, and the system uses the water tank to store cold in the peak stage of electricity price and stores refrigeration in the freezing water tank for standby in the low-peak stage of electricity price; therefore, the energy consumption cost of automobile manufacturers is reduced.

Description

Technical Field

[0001] This utility model relates to the field of chilled water use, specifically a chilled water energy-saving operation system. Background Technology

[0002] As the workforce in the manufacturing sector becomes increasingly younger and ambient air temperatures rise year by year, major automobile manufacturers have installed air conditioning systems in their factories to lower workshop temperatures and provide a comfortable working environment for employees during the summer. The cooling source used for this cooling comes from the cooling water produced by chiller units, which consume a significant amount of electricity.

[0003] For industrial electricity, the price of electricity varies at different times of the day. According to the conventional configuration of chiller units, the chiller units are responsible for the most electricity during the peak electricity price period, and the electricity cost is the highest. For car manufacturers, this increases the cost of manufacturing cars significantly. Utility Model Content

[0004] The purpose of this utility model is to provide an energy-saving chilled water operation system to reduce the per-vehicle manufacturing cost for automobile manufacturers and to provide a good working environment for front-line employees.

[0005] The technical solution adopted by this utility model is as follows: a chilled water energy-saving operation system, including a chiller unit and a cooling tower connected to the chiller unit through a cooling pipe, a cooling pump installed on the cooling pipe, the chiller unit being connected to each cooling equipment through a water supply pipe and a water return pipe, a valve six installed on the water supply pipe near the cooling equipment, and a valve five, a valve two, a chilled water tank, a chilled water pump and a valve seven installed sequentially from the cooling equipment side on the water return pipe;

[0006] The inlet side of valve six and the outlet side of valve five are connected by pipe one, and valve one is installed on pipe one. The outlet side of the chilled pump is connected to the water supply pipe by pipe two, and valve three is installed on pipe two.

[0007] Furthermore, valve one, valve two, and valve three are electric valves.

[0008] Furthermore, an insulation layer with a thickness of 150mm is provided on the outside of the cold water tank.

[0009] Furthermore, a one-way valve is installed on the water supply pipe.

[0010] Furthermore, a level gauge is installed in the cold water tank, and the level gauge is interlocked with the valve.

[0011] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0012] This invention enables the same unit to have a cold storage function by setting up a chilled water tank, rationally arranging the chilled water circulation pipeline, and configuring corresponding automatic control valves. The chilled water tank serves as the carrier of the refrigerant. During peak electricity price periods, the system uses the water tank to store cold, and during off-peak electricity price periods, the cooling is stored in the chilled water tank for backup, thereby reducing the energy consumption costs for automobile manufacturers. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the present invention.

[0014] Explanation of reference numerals in the attached figures:

[0015] 1. Return water pipe; 2. Supply water pipe; 3. Valve 6; 4. Valve 5; 5. Valve 2; 6. Valve 1; 7. Valve 3; 8. Chilled water pump; 9. Valve 7; 10. Chiller unit; 11. Cooling tower; 12. Chilled water tank; 13. Check valve; 14. Second chilled water pump. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0017] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention. Example

[0018] Figure 1 As shown: A chilled water energy-saving operation system includes a chiller unit 10 and a cooling tower 11 connected to the chiller unit 10 via cooling pipes. A cooling pump is installed on the cooling pipes. The chiller unit 10 is connected to each cooling equipment via a water supply pipe 2 and a water return pipe 1. A valve 6 3 is installed on the water supply pipe 2 near the cooling equipment. A valve 5 4, a valve 2 5, a chilled water tank 12, a chilled water pump 8, and a valve 7 9 are installed sequentially on the water return pipe 1 starting from the cooling equipment side.

[0019] The inlet side of valve 6 3 and the outlet side of valve 5 4 are connected by pipe 1, and valve 1 6 is installed on pipe 1. The outlet side of chilled pump 8 is connected to water supply pipe 2 by pipe 2, and valve 3 7 is installed on pipe 2.

[0020] In normal mode, chiller unit 10 is turned on, chilled water pump 8 is turned on, cooling pump is turned on, cooling tower 11 is turned on, valve 1 is turned off, valve 2 is turned on, valve 3 is turned off, valve 4 and valve 6 are turned on, and valve 7 is turned on. At this time, chilled water tank 12 only serves as a buffer. The room temperature water generated by the cooling equipment needs to be cooled by chiller unit 10 before being sent to the cooling equipment. This operating state is suitable for low electricity prices.

[0021] In chiller unit 10, the refrigerant is compressed into a high-temperature, high-pressure gas in the compressor, then releases heat and condenses into a liquid in the condenser. The heat released by the condenser is absorbed by the cooling tower 11. Subsequently, the liquid refrigerant passes through the expansion valve to reduce its pressure and temperature, enters the evaporator, absorbs heat from the chilled water returning from the refrigerated equipment, and evaporates into a gas, thereby lowering the temperature of the chilled water. Through these processes, the chiller unit can continuously absorb heat from the environment, providing a stable cooling effect.

[0022] During off-peak electricity hours, the system's cold storage mode is activated. Chiller 10, chilled water pump 8, cooling pump, and cooling tower 11 are all turned on. Valve 1 (6) is open, valve 2 (5) is open, valve 3 (7) is closed, and valves 5 (4) and 6 (3) are closed, preventing the supply of chilled water to the equipment. Valve 7 (9) is opened, and water is pumped from chilled water tank 12 into chiller 10 via chilled water pump 8 to produce low-temperature chilled water. The low-temperature chilled water then enters chilled water tank 12 through chilled water circulation pipes via valves 1 (6) and 2 (5). At this time, chilled water tank 12 and chiller 10 form a circulation loop until the water temperature in chilled water tank 12 reaches the set value.

[0023] During peak electricity hours, the chilled water stored in the chilled water tank 12, which is used during off-peak hours, supplies chilled water to the cooling equipment. At this time, the chiller unit 10 is shut down, the second chilled water pump 14 is turned on, the cooling tower 11 and the cooling pump are shut down, valves 6 and 9 are closed, and valves 5, 7, 4, and 3 are opened. The low-temperature chilled water in the chilled water tank 8 then flows to the various cooling equipment through the second chilled water pump 14, valve 7, and valve 3. The room-temperature water after heat exchange enters the chilled water tank 12 through valves 4 and 5. At this time, the chiller unit 10, the cooling pump, and the cooling tower 11 are in a shut-off state, saving energy consumption.

[0024] Among them, valve 6, valve 5, and valve 7 are electric valves, and the three valves have interlocking protection actions to avoid the risk of valves being out of order. Example

[0025] The difference between this embodiment and embodiment 1 is that: an insulation layer with a thickness of 150mm is provided on the outside of the cold water tank 12, and a level gauge is provided inside the cold water tank 12, and the level gauge and valve 2 5 are interlocked to prevent the liquid level in the chilled water tank from exceeding the limit. Example

[0026] The difference between this embodiment and embodiment 1 is that a one-way valve 13 is installed on the water supply pipe 2 to prevent cold water backflow.

[0027] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A chilled water energy-saving operation system, characterized in that, Includes a chiller unit (10) and a cooling tower (11) connected to the chiller unit (10) via a cooling pipe. A cooling pump is installed on the cooling pipe. The chiller unit (10) is connected to each cooling equipment via a water supply pipe (2) and a water return pipe (1). A valve six (3) is installed on the water supply pipe (2) near the cooling equipment. A valve five (4), a valve two (5), a chilled water tank (12), a chilled pump (8), and a valve seven (9) are installed on the water return pipe (1) starting from the cooling equipment. The inlet side of valve six (3) and the outlet side of valve five (4) are connected by pipe one, and valve one (6) is installed on pipe one. The outlet side of the chilled pump (8) is connected to the water supply pipe (2) by pipe two, and valve three (7) is installed on pipe two.

2. The chilled water energy-saving operation system according to claim 1, characterized in that: Valve 1 (6), valve 2 (5) and valve 3 (7) are electric valves.

3. The chilled water energy-saving operation system according to claim 1, characterized in that: The cold water tank (12) is provided with an insulation layer on the outside, and the thickness of the insulation layer is 150mm.

4. The chilled water energy-saving operation system according to claim 1, characterized in that: A one-way valve (13) is installed on the water supply pipe (2).

5. The chilled water energy-saving operation system according to claim 3, characterized in that: A level gauge is installed in the cold water tank (12), and the level gauge is interlocked with the valve (5).

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