Can a pump deliver fluid to a spherical tank?
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1. The tank is filled with water up to 50% of its capacity, and the pressure at the top of the tank is 0.3 MPa. The water is pumped to the spherical tank using a pump with a head of 70 meters; at this point, the pressure in the spherical tank is 0.9 MPa. Can the water in the tank be pumped into the spherical tank using this pump? 2. If the pressure in the tank is at atmospheric level, and water is pumped into the spherical tank using a pump with a head of 70 meters, with the pressure in the spherical tank being 0.9 MPA, can the water from the tank be pumped into the spherical tank? These are two different conditions; those who know please let me know, thank you
1. If the initial pressure is 0.3 MPa, and the head of the pump is 70 meters, this corresponds to a pressure of approximately 0.7 MPa; thus the total pressure is about 1.0 MPa (0.3 + 0.7), which is higher than the 0.9 MPa in the spherical tank. Therefore, water can be pumped into the spherical tank. 2. If the initial pressure of the tank is at atmospheric pressure (about 0.1 MPa), the pump still generates a pressure of around 0.7 MPa, resulting in a total pressure of about 0.8 MPa (0.1 + 0.7). This value is lower than the 0.9 MPa required for the spherical tank, so water cannot be pumped into it. .
The head from the liquid level in the tank to the pump + the pump’s head > the head from the liquid level in the spherical tank to the pump + the pressure inside the spherical tank + pressure losses; this will allow the liquid to be pumped in, right?
The first one is fine; for the second one, it depends on the head and flow rate curve of the pump. It might be possible to achieve the required pressure when the flow rate is reduced, as 70 meters represents only the rated head at the point of highest efficiency