Method for commissioning a negative pressure cooling system

Abstract

The application relates to a debugging method of a negative pressure cooling system. The debugging method of the negative pressure cooling system comprises the following steps: controlling electric ball valves III and VI on a positive pressure circulating pipeline, performing positive pressure circulating pipeline debugging on the negative pressure cooling system; controlling electric ball valves I, II, IV and V, performing negative pressure circulating pipeline debugging; and performing negative pressure circulation and positive pressure circulation state switching debugging, so that the negative pressure cooling system forms a stable operation circulating water pipeline, and the circulating cooling water flow meets the cooling strength requirement of a cooling unit. The scheme provided by the application can form stable circulating water flow by performing positive pressure circulating pipeline debugging and negative pressure circulating pipeline debugging on the negative pressure cooling system, meet the cooling requirement of the cooling unit, and make the negative pressure circulation and the positive pressure circulation mode switchable and capable of being quickly and stably operated after switching.

Claims

1. A method for commissioning a negative pressure cooling system, the method being used in a negative pressure cooling system comprising a controller, electric ball valves I-VI, a vacuum pump, a water pump, and a return water pump, wherein the negative pressure cooling system further comprises a positive pressure pipeline, a negative pressure pipeline, a water pumping module, a cooling module, a negative pressure module, and a return water module; the positive pressure pipeline and the negative pressure pipeline are connected to the water pumping module and the cooling module, the negative pressure module is connected to the negative pressure pipeline, the cooling module is connected to the return water module, and the return water module is connected to the water pumping module; the positive pressure pipeline includes... The system comprises: electric ball valve III, positive pressure return water pipe, electric ball valve VI, and water distribution pipe; negative pressure pipeline including flow meter II, electric ball valve II, water distribution pipe, return water pipe, pressure gauge, air-water separator, and electric ball valve IV; the pumping module including a water pump, flow meter I, inlet pipe, electric ball valve I, and water distribution tank; the negative pressure module including a vacuum pump set, electric ball valve V, and air pipe; the cooling module including a cooling unit; and the return water module including a return water tank, level gauge II, thermometer, return water pump, and cooling tower; characterized in that... The debugging method includes: Control the electric ball valves III and VI on the positive pressure circulation pipeline to perform positive pressure circulation pipeline debugging on the negative pressure cooling system; Control electric ball valves I, II, IV, and V to perform negative pressure circulation pipeline debugging. Negative pressure circulation pipeline debugging includes cold-state debugging and hot-state debugging. During cold-state debugging, control electric ball valves I, II, IV, and V to open, and electric ball valves III and VI to close. Start the vacuum pump to create negative pressure in the negative pressure pipeline, forming a stable siphon negative pressure water flow, ensuring the water flow meets the cooling unit's requirements. Determine the vacuum pump power, and determine the power of the pumping and return pumps based on the water flow. Specifically, the cold-state debugging includes: negative pressure circulation pipeline debugging with the vacuum pump running and negative pressure circulation pipeline debugging with the vacuum pump off. Negative pressure circulation pipeline debugging with the vacuum pump running: Control electric ball valves I, II, IV, and V to open, and electric ball valves III and VI to close. Electric ball valves II, IV, and V are opened, while electric ball valves III and VI are closed. The vacuum pump is started to create negative pressure in the negative pressure pipeline, drawing cooling water to form a stable siphon negative pressure water flow. By adjusting the vacuum pump power, the water flow rate is made to meet the cooling unit's requirements. The vacuum pump power is determined, and the power of the pumping and return pumps is adjusted according to the water flow rate to ensure a stable water circulation in the negative pressure cooling system, with no water or air leaks in the pipeline. Negative pressure circulation pipeline debugging with the vacuum pump off: After a stable siphon negative pressure water flow is formed, the vacuum pump is turned off to determine if the siphon effect can be maintained. If it can be maintained, the power of the pumping and return pumps is adjusted according to the current siphon negative pressure water flow rate to ensure a stable water circulation in the negative pressure cooling system. During hot commissioning, when the cooling unit is subjected to heat flow impact, repeat the cold commissioning steps of the negative pressure circulation pipeline to determine the power of the vacuum pump, the power of the water pump and the power of the return water pump, and ensure that there is no water or air leakage in the pipeline, so that the cooling water flow rate meets the cooling requirements of the cooling unit subjected to heat flow impact. The negative pressure circulation and positive pressure circulation states are switched and adjusted to ensure that the negative pressure cooling system forms a stable operating circulation water path and that the circulation cooling water flow rate meets the cooling intensity requirements of the cooling unit.

2. The commissioning method of claim 1, wherein, The electric ball valves III and VI on the control positive pressure circulation pipeline are used to debug the positive pressure circulation pipeline of the negative pressure cooling system, specifically including: Control the opening of electric ball valves III and VI, and close the negative pressure pipeline valves. Adjust the operating power of the water pump when the cooling unit is in a cold state and a hot state, respectively, until the water flow meets the requirements of the cooling unit. Determine the operating power of the water pump and ensure that there is no water leakage in the pipeline. The positive pressure circulation pipeline debugging is then completed.

3. The debugging method according to claim 1, characterized in that, The specific debugging process for switching between negative pressure circulation and positive pressure circulation includes: In cold conditions, the controller switches the negative pressure circulation to positive pressure circulation. Based on the operation of the positive pressure circulation pipeline, the power adjustment mode of the water pump is determined to make the water flow in the positive pressure circulation pipeline fast and stable, and the flow rate meets the requirements of the cooling unit. Then, the controller switches the positive pressure circulation to negative pressure circulation and determines the vacuum pump power adjustment mode, so that the negative pressure pipeline can quickly form a stable siphon negative pressure water flow and form a stable water circulation.

4. The debugging method according to claim 1, characterized in that, The negative pressure cooling system also includes: Flow meters I-II, level gauges I-II, thermometers, return water tank, distribution water tank, gas-liquid separator; The commissioning method also includes: commissioning the return water pump; and / or, commissioning the vacuum pump.

5. The debugging method according to claim 4, characterized in that, The commissioning and operation of the return water pump includes: Open electric ball valves III and IV, and close the remaining valves. Confirm that the flow meter, pressure gauge, and thermometer are displaying normally. The liquid level and return water pump are working normally in an interlocking manner, and there is no water overflow in the return water tank. The relationship between the liquid level and the power of the return water pump has been determined, and the operation and commissioning of the return water pump has been completed.

6. The debugging method according to claim 4, characterized in that, The commissioning of the return water pump and the vacuum pump includes: Control the opening of electric ball valves I, II, V, and IV, and the closing of the others. Start the vacuum pump, water pump, and return water pump to create negative pressure water flow in the negative pressure pipeline. Continuously adjust the power of the vacuum pump and return water pump to form a stable water circulation in the negative pressure cooling system, which can meet the needs of the cooling unit. Ensure that there is no water or air leakage in the pipeline and that the negative pressure can be maintained. Complete the operation and debugging of the return water pump and the vacuum pump.

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