- 2 (L) Schematic of an ejector; (R) Parameters of an ejector in calculation 4. Experimental set up 4.1. Experimental testing device For a purpose of measuring the actual performance of an ejector cycle, an indoor testing device was set up. Figure 3 shows a schematic of the whole set of testing device, which consists of a vapor generator.
- This is the way the formula is usually written in scientific texts but a slightly easier form for computational purpose is: where: Fp = the ejection resistance force (N) E = Young’s modulus of the polymer (N/cm2). A = total surface area of moulding in contact with cavity or core, in line of draw (cm2).
Eductor calculations
An ejector is intended to move high gas-cut fluids and has a convergent section for an entry to the straight throat which is again followed by a divergent section. Steam can be used as the motive fluid in either case. The reason for the lecture is that if you a trying to pump liquid you don't want to use and ejector (velocities get pretty high).
Eductor calculations
Anyone have experience with eductors?
I am a new engineer and am looking for pointers on calculating the flowrate needed to move a gas.
We have up to a 150# steam supply as the motive stream. The question is what pressure can we regulate this steam to in order to still maintain the flow.
We are passing the steam at some pressure (this is what is to be determined) through the eductor to induce the flow of a stack gas, which is at or near atmospheric pressure (may actually be a slight vacuum). The outlet of the eductor will have a stack gas/steam mixture that will then be returned to the stack. This flow will serve as a 'fast loop' that every so often an analyzer will pull a 'slip stream' from to test.
Any suggestions as to how to formulate a relation of motive stream to outlet pressure? The eductor used for gases is basically a converging/diverging nozzle from what I understand. The pressure of the motive stream is dropped, to increase its velocity. This in turn sucks the stack gas into the eductor. The two then exit the eductor at an intermediate pressure.
Also, any good sites that thoroughly explain steam usage in refineries? I am looking for something that starts with the basics of steam.
Thank you...
I am a new engineer and am looking for pointers on calculating the flowrate needed to move a gas.
We have up to a 150# steam supply as the motive stream. The question is what pressure can we regulate this steam to in order to still maintain the flow.
We are passing the steam at some pressure (this is what is to be determined) through the eductor to induce the flow of a stack gas, which is at or near atmospheric pressure (may actually be a slight vacuum). The outlet of the eductor will have a stack gas/steam mixture that will then be returned to the stack. This flow will serve as a 'fast loop' that every so often an analyzer will pull a 'slip stream' from to test.
Any suggestions as to how to formulate a relation of motive stream to outlet pressure? The eductor used for gases is basically a converging/diverging nozzle from what I understand. The pressure of the motive stream is dropped, to increase its velocity. This in turn sucks the stack gas into the eductor. The two then exit the eductor at an intermediate pressure.
Also, any good sites that thoroughly explain steam usage in refineries? I am looking for something that starts with the basics of steam.
Thank you...
Eductor calculations
Eductor calculations
Steam Ejector Design Calculation
Eductor Design Calculation
Anyone have experience with eductors?
I am a new engineer and am looking for pointers on calculating the flowrate needed to move a gas.
We have up to a 150# steam supply as the motive stream. The question is what pressure can we regulate this steam to in order to still maintain the flow.
We are passing the steam at some pressure (this is what is to be determined) through the eductor to induce the flow of a stack gas, which is at or near atmospheric pressure (may actually be a slight vacuum). The outlet of the eductor will have a stack gas/steam mixture that will then be returned to the stack. This flow will serve as a 'fast loop' that every so often an analyzer will pull a 'slip stream' from to test.
Any suggestions as to how to formulate a relation of motive stream to outlet pressure? The eductor used for gases is basically a converging/diverging nozzle from what I understand. The pressure of the motive stream is dropped, to increase its velocity. This in turn sucks the stack gas into the eductor. The two then exit the eductor at an intermediate pressure.
Also, any good sites that thoroughly explain steam usage in refineries? I am looking for something that starts with the basics of steam.
Thank you...
I am a new engineer and am looking for pointers on calculating the flowrate needed to move a gas.
We have up to a 150# steam supply as the motive stream. The question is what pressure can we regulate this steam to in order to still maintain the flow.
We are passing the steam at some pressure (this is what is to be determined) through the eductor to induce the flow of a stack gas, which is at or near atmospheric pressure (may actually be a slight vacuum). The outlet of the eductor will have a stack gas/steam mixture that will then be returned to the stack. This flow will serve as a 'fast loop' that every so often an analyzer will pull a 'slip stream' from to test.
Any suggestions as to how to formulate a relation of motive stream to outlet pressure? The eductor used for gases is basically a converging/diverging nozzle from what I understand. The pressure of the motive stream is dropped, to increase its velocity. This in turn sucks the stack gas into the eductor. The two then exit the eductor at an intermediate pressure.
Also, any good sites that thoroughly explain steam usage in refineries? I am looking for something that starts with the basics of steam.
Thank you...