Is it possible to avoid the high point by following the contours from the source to the destination? If you bring the highest point down to around 890 m by making the line a bit longer you could make it work.
I agree with LittleInch that you have an error in your Bernoulli calculation. Assuming that you are pumping something similar to water, the pressure recovery due to Bernoulli in going from 1.5" to 3" will be about 6 psi. There would also be a friction loss of about 3.5 psi through the 1.5" to 3"...
@Javier Sanchez - You can use a similar technique to the way you would match the curves for a centrifugal pump system. The difference is that you would use the pressure at the *suction* of the vacuum pump.
The upstream gas pressure is fixed by your pressure regulator. The downstream pressure...
As pointed out by Pierreick and Snickster, the up and down voting system is a bit confusing if you have not seen it on other forums. Here it is even more confusing because we still have the old "Great post!" button as well and it is not immediately clear how the two systems complement each...
@Asisraja D - you have correctly identified the data required for this calculation but you have not got the correct values for that data. See also LittleInch's comment.
@Asisraja D - Your general procedure makes sense, but there are a few items I believe you have got wrong. Bottled nitrogen is unlikely to be at 6.4 Kelvin. For gases the specific gravity is generally defined as the ratio of the molecular mass to that of air, so your value of 19.48 is strange...
To the member(s) who voted down the posts by me and pierreick - you are absolutely entitled to disagree with any post here, but it adds nothing to the discussion to simply vote a post down without explaining why you disagree with the advice given. The free expression of all points of view is...
For the pressures at which you are working, a well designed piping system will have essentially no pressure drop. All the pressure drop is going to be across the membrane. You should get the pressure vs flow characteristic for the membrane from the supplier and check that at the rated flow the...
Unless there is a dip pipe inside the tank that is connected to the outlet piping the loop on the outlet is not a siphon. It is just a P-trap as described by Snickster. As soon as the level in the tank drops below the outlet nozzle the flow out of the tank will stop.
The loop on the inlet...
I think that LittleInch nailed it, even though auto-copulation added some confusion. The loop will not help with condensate collection and it would have to be much taller to prevent back-flow, so I think accommodating thermal expansion is the correct reason - and it would be good practice anyway.
What is the design pressure for the main tank? How did you select 7" as the outlet line size from the seal pot? Where does this outlet line discharge? Is there some form of gas or vapor in the main tank that would be ejected via the seal pot before the slurry reaches it? At what elevation...
I agree with Snickster that this is not a design to be performed from first principles. Whoever is putting the whole package together should have the necessary experience to specify the Restriction Orifice (RO).
But there are two points to take note of. The first is that it is meaningless to...
In your calculations you have assumed zero slip between the flash steam and the condensate flowing in the 2" pipe. It will not be like that. The condensate will flow at a slower velocity than the steam. Also, the condensate does not flow in a nice neat discrete layer at the bottom of the pipe...
Whether we are looking at a centrifugal pump curve together with its system curve, or as in this case where we are looking at an ejector curve and a system curve all they are is a graphical technique of solving two simultaneous equations. I have used this graphical technique and you have done...
This seems to be a logical statement but it would make the performance of the exhauster look worse and the supplier will want to present their product in the best possible light so I doubt whether they would include these corrections. The only way to be sure would be to check with the supplier...
