Could you please tell me, the calculation masters, how to calculate the emergency nitrogen tank?
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There is a cylindrical nitrogen storage tank with a volume of 20 cubic meters and a pressure of 2.3MPa. It is at normal temperature. The outer wall of the nitrogen tank is not insulated and the ambient temperature is 5°C. The nitrogen in this tank is suddenly released in an emergency. Within 15 minutes, the pressure drops from 2.3MPa to 20kPa. How low can the temperature inside the tank be dropped? The pressures are all relative pressures. How should this be calculated? Thanks in advance!
This post was last edited by Achao syc62100 on 2019-5-7 21:10. You need to use PROII for simulation. I have seen the following formula from the book. You can try it. I don’t know if it is accurate:) k The adiabatic coefficient of gas, nitrogen k=1.4
I will calculate it this way: 1. First press the adiabatic and expansion cooling to a certain degree. 2. Then consider the heat absorption from the environment to increase the temperature within 15 minutes.
You can refer to the relevant information on adiabatic vent refrigeration.
This is a semi-open system and cannot be considered a closed system.