Regarding the pressure issue of the nitrogen control valve
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For a storage tank with a capacity of 1,1000 M3, the amount of nitrogen required for sealing is approximately 170 cubic meters. The pressure in the tank is slightly positive; assuming the absolute pressure is 0, what should be the pressure set behind the control valve? If the absolute pressure is set at 2 KPa, that means there will be a pressure drop of 2 KPa. What will be the flow rate of N2 in the pipeline under these conditions? What diameter should the pipe have? How can this be calculated? Please help me out. I tried using the formula PV = C, assumed a flow rate of 20, and then used this value to determine the pipe diameter. However, this method seems incorrect, as the flow rate of 20 was chosen arbitrarily without any basis. Please help me solve this problem
For such a small pressure difference, we usually use self-standing nitrogen seal valves here. The advantage of this is that the control valve can adjust itself, and it can also help regulate flow and maintain stable pressure; in addition, it saves energy! ! But the question you’ve raised now is still difficult for a newcomer like me to solve! I can’t help! :L
The pressure difference specified by the poster is too low, which makes it difficult to choose an appropriate control valve. Could you explain why such a low pressure difference was chosen?
Look carefully; this is the pressure behind the valve and the pressure difference in the storage tank. The pressure in front of the valve must be very high
Due to the differences among gas seal valve manufacturers, the recommended calculation formulas also vary. It is suggested that LZ use the calculation formulas and size coefficients provided by the manufacturer of the selected product to determine parameters such as gas flow rate, valve selection, and pipe diameter based on the required operating conditions.