Everyone, please help – how do I calculate this? ? ?
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The vapor pressure in the tower is 2 MPa (gauge pressure), the liquid level is 20 m, and the relative density of the liquid is 1.1. A diaphragm pressure gauge P1 is installed at the bottom of the tower, while another pressure gauge P2, filled with a fluid having a relative density of 0.9, is installed at a height of 10 m above the bottom of the tower. What are the reading values of pressure gauges P1 and P2?
Is the density of the liquid 1.1 relative to water? Let’s check if this is correct: the static pressure of the liquid column at the bottom is 1.1*0.1*2=0.22 MPa (the static pressure of a 10-meter-high water column is 0.1 MPa), and the reading on the pressure gauge at the bottom is 2+0.22=2.22 MPa ； At a height of 10 units from the bottom, the static pressure of the liquid column is 1.1*0.1*1=0.11 MPa. If there were no isolating fluid with a relative density of 0.9, the reading on the pressure gauge would be 2+0.11=2.11 MPa. Unfortunately, I have no experience with pressure gauges that use such an isolating fluid, and I don’t know whether it has a pressurizing or depressurizing effect; therefore, I am unable to determine what the actual reading on this pressure gauge is. Wait for a true master to solve the problem. If there are any mistakes in what I said, please feel free to correct me.