For example, 14.7 pounds per square inch absolute is equal to 760 Torr and 407 inches of water. The vacuum brake was, for many years, used in place of the air brake as the standard, fail-safe, train brake used by railways. If you continue browsing the site, you agree to the use of cookies on this website. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. A single stage ejector is very simple. The purpose of this module is to provide an introduction to vacuum, equipment used to produce a vacuum and how the equipment operates. Download Share Share. There is no need to click. If the potential for methanol contamination exists, the liquid in the seal pot is pumped to a methanol recovery system. Partial recovery, where a portion of the sealing liquid is recovered and reused, and closed loop or total recovery, where the entire amount of the sealing liquid is recovered and recycled back to the pump. The purpose of this module is to provide an introduction to vacuum, equipment used to produce a vacuum and how the equipment operates. The Adobe Flash plugin is needed to view this content . When you are finished reviewing the document, click the red X at the top of the screen to close the document and return to the module. By lowering the operating pressure below atmospheric pressure, the boiling point of the components will be lowered and separation can be accomplished without damaging product quality. The gas is separated from the liquid and then the liquid is cooled before being returned to the vacuum pump. The steam turbine is a device to convert the heat in steam to mechanical power. You can change your ad preferences anytime. If you click this button, you can mute the audio and just read the information, if you prefer. Steam Ejectors Vacuum Pumps 2. The other type of condenser used in vacuum systems is the surface contact or shell-and-tube. Explore Vacuum Braking System with Free Download of Seminar Report and PPT in PDF and DOC Format. Types of vacuum pumps include mechanical, high and ultra-high vacuum and venturi jet (also called a jet ejector). Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Medical gas systems should not be used for dental purposes. A steam jet ejector, also called a venturi pump is another simple device used to produce a vacuum. vacuum experimentally by submerging a glass tube, which was filled with mercury and closed at one end, with its open end in a pool of mercury. To make it even easier, you may click anywhere on the slide to continue to the next screen. See our Privacy Policy and User Agreement for details. about vacuum system Determination of vacuum pump operational efficiency, Customer Code: Creating a Company Customers Love, No public clipboards found for this slide, Experienced Mineral Processing Engineer at Tenova Bateman India (formerly known as Bateman Engg (I) Pvt Ltd, Tenova Bateman India (Formerly Bateman Engg (I) Pvt Ltd). The concept of bakeout is introduced and the physics behind it explained. The audio for that slide will continue to play even if you open a document. Loading... PPT – Vacuum Systems for Electron Microscopy PowerPoint presentation | free to view - id: ac63-ZGQ5M. READ SLIDE. This normally implies that one remove air from a system to some acceptable sub atmospheric pressure by the use of some type of vacuum pumping equipment. The atmospheric pressure at the Earth's surface is 14.7 psia. Vacuum Braking System Seminar PPT Download -Mechanical Seminar Topics Abstract. The system also uses air together with water for transport of sewage, as opposed to conventional flush toilets, which use water only. Vacuum System - Free download as Powerpoint Presentation (.ppt), PDF File (.pdf), Text File (.txt) or view presentation slides online. Vacuum on demand systems produce a vacuum only at the moment the toilet needs to be flushed. Parts of Vacuum system? Title: Vorlesung Algorithmen f r Peer-to-Peer-Netzwerke Author: Christian Schindelhauer Keywords: MUA, Vorlesung Last modified by: Christian Schindelhauer – A free PowerPoint PPT presentation (displayed as a Flash slide show) on PowerShow.com - id: 81612c-Yzg2Z Sriram Kranthi 17 March 2018. However we will not dwell on the very basics of vacuum system design but concentrate on the effects in electron and proton … If you have any questions about any of the information presented in this module, contact your trainer. VACUUM SYSTEMS Types and pressure ranges Ejector systems: Ejector systems are made up of a number of ejector stages in series with condensers (direct contact or surface type) between stages to condense the load and motive fluids where temperature and pressure permit. This is another view of what happens to the gas inside the liquid ring vacuum pump. To review the previous screen, simply click on the Back button. High pressure steam provides the energy for the ejector to operate. Thisair pressurefallswithincreasing altitude.Uptoaheightof2,000 m, thereisa linear dropin pressureby approx.12.5mbarper100mto 763mbar. Let’s try a question about the steam jet ejector. In this first section you learn: The definition of vacuum and how operating under a vacuum changes the physical properties of a material; types of equipment that can be used to produce a vacuum and different industrial applications of vacuum and how vacuum provides a benefit to those operations. The ejectors can also be smaller due to the condensing of the gas. Presentations. Motive power - Something, such as water or steam, used to cause motion. ITER´s large high vacuum systems Major plasma radius 6.2 m Plasma Volume: 840 m3 Plasma Current: 15 MA Typical Density: 1020 m-3 Typical Temperature: 20 keV Fusion Power: 500 MW Cryostat pumping system (~ 150 m³/s, 8500 m³) Torus exhaust pumping system (~ 8x80 m³/s, 1400 m³) Neutral Beam (NBI) pumping system (~ 5000 m³/s, 200 m³) 3 large cryopump systems + backing … Let’s try another question to check your understanding. This module will discuss the equipment used to establish a vacuum and the principle of how the equipment operates. Vacuum distributors, hose lines and connections complete the vacuum system and connect suction pads to vacuum generators. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. This configuration uses two steam jet ejectors connected directly to each other followed by a condenser and another steam jet ejector with a condenser. If you have any problems or questions, please contact your trainer. If the temperature of the sealing liquid reaches it’s boiling point, cavitation will occur. Gas molecules are drawn in at the suction, indicated by the yellow arrow, and then trapped by the sealing liquid. This configuration recovers the entire amount of seal liquid discharged from the vacuum pump. Polymerize - To join together many small molecules called monomers to form giant molecules, called macromolecules or polymers. In some aircraft, all the gyros are vacuum, pressure, or electrically operated. Welcome! Click on the appropriate button to pause, rewind or forward. More simply stated, the steam causes the gas to “move” into the suction area of the ejector, labeled number 3 on the graphic. See our Privacy Policy and User Agreement for details. Since a portion of the sealing liquid is discharged along with the gas, it must be replaced. Turbine Vacuum System in Thermal Power Plant - Free download as Powerpoint Presentation (.ppt), PDF File (.pdf), Text File (.txt) or view presentation slides online. The liquid ring vacuum pump has one rotating part – an impeller that is offset from the center of the pumping chamber. If you continue browsing the site, you agree to the use of cookies on this website. Use your mouse to move the cursor arrow over the pink box and the word's definition will appear. Each test consists of 20 questions and a score of 80% is required for successful completion. Presentation Title: Vacuum Control System For Target Ess Indico (indico) Presentation Summary : PLC system for process control of the vacuum system. If you have any … It is virtually maintenance free and simple to operate. Now customize the name of a clipboard to store your clips. This arrangement is the best option when the seal liquid may become contaminated. Condensers are often used as part of the vacuum system and correct operation of the condensers is just as important to obtaining the desired vacuum as correct operation of the steam jet ejectors and liquid ring vacuum pumps. The liquid ring traps and seals the gas inside the pump. Let’s get started! Didactic With certified courses, seminars and customer-specific training sessions on all topics within vacuum technology and efficiency, Schmalz provides expertise that is tailored to the exact requirements of your company. The condenser operates at the discharge pressure of the upstream ejector and the suction pressure of the downstream ejector. The vapors are compressed and discharged from the diffuser, Area 5 at a pressure higher than the pressure of the process gas, but lower than the inlet pressure of the steam. Some more examples of industrial application of vacuum include, solid-liquid separation and drying of solids. Virtual Surface adsorption Outgassing Huber’s rule Water desorbs very slowly from all surfaces Always backfill your vacuum system with dry nitrogen Minimize surface area Ultimate vacuum/limiting pressure System bakeout P(T) = P0 e This bar works just like the controls on a VCR or DVD player. and vacuum systems differ from those for medical air and vacuum, and they should be provided in addition to the medical gas pipework systems (MGPS). Next we will discuss in detail how the steam jet ejector works. Get the plugin now. Power Plant Vacuum Systems: Improving Turbine Efficiencies for Geothermal, Coal-Fired and Gas-Fired Power Plants. The vacuum pump has an inlet for the constant replacement of the sealing liquid. However, the operating costs are high due to a need for a large amount of steam. A vehicle brake is a brake used to slow down a vehicle by converting its kinetic energy into heat. Aftercondensers do not improve the efficiency of the ejector system, but are used to recover the heat of the steam, to recover condensate and to minimize air emissions and odors. Vacuum system performance is determined by: • System design (volume, conductance, surface, materials) • Gas load, Q - Surface condition (outgassing and contaminations) - System materials (diffusion and permeation) - Leaks (external and internal leaks) • Pumping speed, S ∝ . In Section 3, you will be presented information about Steam Jet Ejectors. READ SLIDE. Vacuum is typically measured in units of mm of Mercury, inches of water or Torr. 1 Preface Oerlikon Leybold Vacuum, a member of the globally active industrial Oerlikon Group of companies has developed into the world market leader in the area of vacuum technology. Vacuum system: pumps Rafael Seraphim 10-12 10-10 10-8 10-6 10-4 10-2 1 10 +2 Mechanical pumps Turbomolecular Cryogenic pump Sputter ion pump Titanium sublimation pump Diffusion pump mbar Ultrahigh vacuum High vacuum Rough and Medium Vacuum Must be combined with mechanical pumps Only started after pumped by the combination of pumps above ISWA 2016, July, 3 -8, Campinas. Let’s try a question about condensers. Make up - Material added (as in a manufacturing process) to replace material that has been used up or removed. What is a vacuum? The disadvantage is the cost associated with replacing and discharging the seal liquid. With partial recovery, part of the seal liquid is recovered and mixed with fresh seal liquid. An intercondenser is positioned between ejector stages. The condenser reduces the amount of gas the next ejector must move. There are four basic configurations of steam jet ejectors. The vapor stream is almost always shell side to minimize the pressure drop. It is important that the make-up sealing liquid temperature is cool enough to prevent cavitation. 3. Once through or no recovery, where the sealing liquid is only used once and discharged. When condensers are used, they are an integral and important part of the vacuum system. This helps to maintain product quality and prevent degradation. Steam Ejectors Vacuum Pumps 2. By … zIonizing gauges can be used in HV effectively from 10-6-10-10 Torr. A strong or high vacuum is well below atmospheric pressure A weak or low vacuum is slightly below atmospheric pressure Atmospheric Pressure - Pressure on a planet's surface caused by the amount of gas in the atmosphere. Vacuum Braking System Seminar ppt. VACUUM SYSTEM DESIGN A.G. Mathewson CERN. The first intercondenser is the most crucial to obtaining the desired vacuum. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Actions. Pipe and Tubing Central Vacuum Systems Installation Best Practices Rev 4, 08APR2014. Let’s try a few questions for review. Croll Reynolds steam ejector and hybrid ejector-liquid ring vacuum systems find application in coal, gas and oil fired power plants as well as in nuclear and geothermal power installations. READ THE SLIDE. Atmospheric pressure was used as an example and anything below that is considered a vacuum. Clipping is a handy way to collect important slides you want to go back to later. This diagram shows where the gas enters the pump and where it is discharged. (1) A source for the seal liquid, (2) A regulating device, such as a valve to control the flow of seal liquid, (3) A component to stop the flow of liquid when the pump is turned off and (4) A device to separate the seal liquid from the gas. This table provides a comparison of different units of pressure measurement. Let’s try a few questions about the liquid ring vacuum pump. Let’s go over some instructions for features you can use while watching this module. aperformancelevelof80%vacuum achievesabsolutepressureof approx.0.2 bar(200 mbar). The operating pressure of an intercondenser is related to the maximum temperature of the cooling water. See our User Agreement and Privacy Policy. A precondenser is preferably attached directly to the vacuum vessel in order to minimize any pressure drop. However, this type of system requires a great deal more energy to operate. The Adobe Flash plugin is needed to view this content. The VOD toilet evacuates air from the drainpipes automatically upon activation of the activator button. A non-condensable gas is a gas that will not undergo a phase change, even though other gas is condensed in the same location. In fact, the vapor load to the condenser can be 10 times that to the ejector. Single stage, multi-stage with out condensing, multi-stage with condensing and a combination of condensing and non-condensing stages. 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