Table of Contents
How do steam jet ejectors work?
In a jet or ejector, a relatively high-pressure gas, like steam or air, expands through a nozzle. The steam or air converts that pressure or potential energy to velocity or kinetic energy. The jet of high-velocity steam or gas entrains the gas to be evacuated or pumped in the suction of the ejector.
How do jet pump ejectors work?
Ejectors, or jet pumps, utilize the pressure energy of a high-pressure fluid stream to boost the pressure and/or flow of a low-pressure source. They can operate with either incompressible or compressible fluids as the primary (driving) and secondary (driven) flows.
How many types of ejectors are there?
Ejectors are generally categorized into one of four basic types: single-stage, multi-stage non-condensing, multi-stage condensing and multi-stage with both condensing and non-condensing stages. Single-stage ejectors are the simplest and most commonly used construction.
How do vacuum ejectors work?
In an ejector, a working fluid (liquid or gaseous) flows through a jet nozzle into a tube that first narrows and then expands in cross-sectional area. The fluid leaving the jet is flowing at a high velocity which due to Bernoulli’s principle results in it having low pressure, thus generating a vacuum.
How do extractors and ejectors work?
The extractor removes the cartridge case from the chamber, essentially pulling the case to the rear. At some point in the rearward travel, the case typically makes contact with the ejector, which “kicks” the expended case out of the firearm, making room for an unfired cartridge to be loaded.
How do ejectors work on over under shotgun?
The extractor in an ejector gun works the same way as in an extractor gun, until the gun is fired. The mechanical act of firing the gun trips the spring-loaded ejector mechanism located inside the forearm. So that when it is opened, it shoots the empty(s) out.
What is the efficiency of an ejector?
(2012) analyzed the efficiencies of an air-air and a steam-steam ejector and found that the properties of working fluid affect the ejector efficiencies significantly; within the compression ratio from 1 to 1.5, the exergetic efficiency of steam-steam ejector varies from 5% to 40%, while the exergetic efficiency of air- …
How do ejectors work in firearms?
The mechanical act of firing the gun trips the spring loaded ejector mechanism located inside the forearm. So that when it is opened, it shoots the empty(s) out. They are designed to only eject on the fired barrel, and extract on the unfired barrel, preventing you from ejecting live cartridges onto the ground.
How does steam ejector calculate steam consumption?
- cp = Specific heat capacity of the secondary fluid (kJ/kg K) or (kJ/kg °C)
- ms = Mean steam consumption rate (kg/s)
- hfg = Specific enthalpy of evaporation of steam (kJ/kg)
- cp = Specific heat capacity of the secondary fluid (kJ/kg °C)
How does a bolt ejector work?
As you open the bolt, the casing is grabbed by the extractor prongs, then as you pull the bolt back, the ejector, which is a fixed metal rod, not part of the bolt, comes through a space in the bolt to hit the casing at an angle to send it out of the receiver, usually at a slight angle away from the shooter.
How do you calculate steam cost per kg?
Calculating the Cost of Steam
- The below formula has been used by some[i] as a rough estimate of total steam cost:
- SC = (aF * (Hg _ hf) ) / (1,000 • ηB)[ii]
- hf = % (GR) + %(LP) + %(MP) + %(HP) + %(MW)