Is related with turbulent flow and the restriction the devices makes to the flow. Motel Anointment. 150053119008 Dharmajeet Jadeja Looks like you’ve clipped this slide to already. Explain the basic operation, list the advantages and disadvantages of each flow measurement device. Piston flow meter operates on the principle of a piston oscillating within a casing of known volume. Accurate flow measurement is very important for proper and equitable distribution of water among water users. Raising the bottom of the channel; 2. Note: pipe flow measurement devices require that the pipe flow full What are the most commonly used? Within these two broad classes are a number of special classes that one should be careful of. During a power outage, an operator turned off the pressure measurement devices. Describe the importance of flow measurement. The flow-measuring device, including flow measurement valves, should be positioned upstream of any associated valve and installed with a reasonable length of straight pipe upstream and downstream of the device. Search Search. Fluid flows up through the tapered tube and suspends a ‘float’ in the column of fluid. Flow measurement for liquids, gases and steam. See our User Agreement and Privacy Policy. Scribd is the world's largest social reading and publishing site. Accurate flow measurement is very important for proper and equitable distribution of water among water users. Flow Measuring Device # 2. FLOW MEASUREMENT CHAPTER 2 OBJECTIVES After you study this chapter, you should be able to 1. Determine the relationship between Reynolds number and the coefficient of discharge. Numerous practical details provide the user with valuable information about flow metering in industrial applications. The device produces a characterized relationship between the liquid level in ( flumes ) or upstream ( weirs ) of the device and the flow rate at a single, defined location under free-flow conditions. Flow Measurement Devices Increasing utilization and the value of water makes the understanding of water measuring techniques important and necessary. In comparison to other flow measurement devices such as an orifice plate, the smooth contraction and expansion does not cause a significant pressure loss as fluid streamlines are able to conform to the geometry. This article will provide the following information in short: Types of Flowmeters/ Flowmeter types 1.1 Types of flow measurement devices Fluid flow devices fall into a number of device categories as well as fluid classes. Experiment (4): Flow measurement Introduction: The flow measuring apparatus is used to familiarize the students with typical methods of flow measurement of an incompressible fluid and, at the same time demonstrate applications of the Bernoulli's equation. Radar devices can only measure surface velocities, whereas laser-based devices can measure velocities sub-surface. 22d) (C) Pitot tube: In such a device, part of the flow is made stagnant so that the entire KE of the fluid is converted into pressure–energy. Clipping is a handy way to collect important slides you want to go back to later. Contracting the flow cross-section (narrowing the channel). In general we can split the fluids into two classes; gasses and liquids. Primary Device. Because they are used for domestic water measurement, piston meters, also known as rotary piston or semi-positive displacement meters, are the most common flow measurement devices in the UK and are used for almost all meter sizes up to and including 40 mm ( 1 1 ⁄ 2 in). Dirty fluids can also be metered. Flow • explain how devices generate a differential pressure signal: orifice, venturi, flow nozzle, elbow, pitot tube, annubar; • explain how each of the following will affect the indicated flow signal from each of the above devices: change in process fluid temperature; change in process fluid pressure; and erosion. 08 09.2011 Therefore, our flow measurement devices are the perfect all-in-one tools to provide users with all necessary information on possible energy savings. Premonitions Truncating Purported. Industrial flow measurement Industrial flow measurement Basics and practice D184B075U02 Rev. 7.72). Presentation Summary : In laminar flow, the fluid moves smoothly in orderly layers, with little or no mixing of the fluid across the flow stream. crude methods of flow measurement, but as you will see, these crude methods are still in use today. Hot wire anemometers based on h = f(v) 4. With the "annubar", or multi-orifice pitot probe, the dynamic pressure can be measured across the velocity profile, and the annubar obtains an averaging effect. Information concerning the volume of available water is very helpful in planning If you continue browsing the site, you agree to the use of cookies on this website. The Adobe Flash plugin is needed to view this content. The movable vane meter is a robust device suitable for the measurement of high flow rates where only moderate requirements on the measurement accuracy are made. See our User Agreement and Privacy Policy. In addition to these products, First Sensor also develops and manufactures custom-made multi-sensor modules as a simple plug-and-play solution for respiratory devices. The position of the float indicates the flow rate on a marked scale. Differential pressure flow measurement is old and reliable. Flow meters are also known as Flow Gauges. 2. Even more, properties of the fluid can be stored on the instrument and measuring temperature and absolute pressure allows to correct fluid parameters such as density and viscosity and then to obtain the mass flow rate. Pneumotachs and heated wire systems are flow sensing devices that are used to integrate flow into volume. Remove this presentation Flag as Inappropriate I Don't Like This I like this Remember as a Favorite. Close suggestions. measuring the flowrate and quantities of flowing fluids are described and compared. Applicator leads you through an individual product selection via application parameters. Obstruction Flowmeter. Integration is a process whereby flow (ie: volume per unit of time) at small intervals (time) is converted into volume and the volume from each interval is summed. Accurate Flowmeters & Instrumentation Pvt. The flow measuring apparatus is used to familiarize the students with typical methods of flow measurement of an incompressible fluid and, at the same time demonstrate applications of the Bernoulli's equation. OBJECT The purpose of this experiment is to study some of the famous instruments used in flow measurements. Where a measuring accuracy of 5% is sufficient, these lengths should be a minimum of ten and three equivalent pipe diameters, respectively.  The Displaying flow measurement and instrumentation PowerPoint Presentations Recommending A Strategy Whycos Portal (@ Wmo) PPT Presentation Summary : Instrumentation Assessments Office of Surface Water – policy on flow measurement instruments Water … With depth and a programmed cross-section this can then provide discharge flow measurement. If you continue browsing the site, you agree to the use of cookies on this website. en Change Language. Pneumotachs and heated wire systems are flow sensing devices that are used to integrate flow into volume. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Lecture Series on Industrial Automation and Control by Prof. S. Mukhopadhyay, Department of Electrical Engineering, IIT Kharagpur. A primary device is used to measure open channel flow using a structure like a flume, weir or dam that enables the measurement of flow by measuring the depth. Every day, large quantities of natural gas flow from production facilities to municipal utilities and industrial consumers via large pipelines. The valve shall be of the bi-directional, blow-out resistant, tight shutoff, ball design, with position indicator, memory device, checked metering ports with drip caps and integral drain ports opposite the metering ports type. 18.6). Mechanical type flow meters. Flow measurement devices strive to achieve this critical flow for various conditions thus providing an accurate means of measurement. The experiment is designed to study uniform water flow over a range of flow rates. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Turbine flow … Variable Area Flow Meters Basics and Practices, No public clipboards found for this slide. the actual flow-rate to the theoretical flow-rate through a device. There is a lot of technical knowledge and expertise required in the development of these devices. The unique “cryogenic” features have to do with instrumentation used to detect signal and need for low heat leak. FLOW MEASURING DEVICES This phenomenon is all around us in the physical world; for example the earth’s rotation and its effect on the weather. There are two methods used in calibrating gas flowmeters, as follows:The direct method, where the meter is calibrated to a specific pure process gas or to the actual components of a mixed gas in use. 150053119009 Bhavesh Katariya. Lecture 22: Flow measuring devices (Fig. 30 Flow measurement 5.1.2 Measurement procedures using weirs To obtain a true measurement of the flow over weirs, certain dimensions must be respected because they are critical to correct operation. flow-measuring devices commonly used in the laboratory and in industry while performing calibration procedures. Different Types of flow measuring devices. Flow • explain how devices generate a differential pressure signal: orifice, venturi, flow nozzle, elbow, pitot tube, annubar; • explain how each of the following will affect the indicated flow signal from each of the above devices: change in process fluid temperature; change in process fluid pressure; and erosion. These measurement devices have come ahead to revolutionize the measurement world. OBJECTIVES After you study this chapter, you should be able to 1. Flow Measurement is the process of measuring fluid in your plant or industry. Obstruction or head type flowmeters are of two types: Differential Pressure Type objective of our presentation Our product finder helps you to search for suitable measuring devices, software or system components via product characteristics. Chapter 9 FLOW MEASUREMENT 241 Introduction, 241 Flow Principles, 241 Flow-Measuring Techniques, 252 Chapter 10 FINAL CONTROL ELEMENTS 275 Introduction, 275 Control Valve Basics, 275 AC and DC Motors, 292 Pumps, 302 Chapter 11 PROCESS CONTROL COMPUTERS 309 Introduction, 309 History of Process Control Computers, 309 Distributed Control Systems, 315 With the aid of microprocessor technology now discharge coefficient calculations can be done in real time. The orifice meter, the nozzle meter, and the Venturi meter are the most common devices used to measure the instantaneous flowrate. Another way to state this is to say that the accuracy of a weir or flume is quite high even at low flow … measuring devices. 2. Upload. Other feature of the flow apparatus includes a 90 degree elbow with pressure tappings. 3. Looks like you’ve clipped this slide to already. Sign In Join. Measuring liquid flow in channels is a unique challenge requiring specialized technology – and Siemens delivers. Cryogenic flow metering techniques 1. A flow measurement valve shall be installed on each hot/chilled water unit or as otherwise shown on plans. In its simple form the pitot tube consists of a glass tube whose lower end is bent at right angles (Fig. 1. Flow Measurement Devices Increasing utilization and the value of water makes the understanding of water measuring techniques important and necessary. 1 C-8\N-IND\CH-5-1. Define flow For flow measurement purposed, a hydraulic structure is a fixed geometry device that is placed into the flow so that all of the flow is directed through or over the device. Total flow meters, usually volume totalizers, are devices filled with a defined volume which is then measured and integrated to determine the total flow volume.Direct volume totalizers have movable measuring chambers with a defined volume (comparable to a line of buckets). As shown in the adjacent diagram, a gasket is used to seal the space between the Orifice Plate and the Flange surface, prevent leakage. Flow meters are flow measuring instruments used to measure the linear, nonlinear, mass, or volumetric flow rate of a gas or a liquid. Two phase flows 1. Created by: 150053119007 Harsh Dharaiya Home. Lecture 7 flow measurement youtube. Lecture 22: Flow measuring devices (Fig. View Chapter 2 FLOW MEASUREMENT.ppt from CHEMICAL 434 at Universiti Teknologi Mara. In contrast to many other working principles, the pressure loss resulting from our consumption measurement method is negligible. 2. Flow meter is a device that measures the rate of flow or quantity of a moving fluid in an open or closed conduit. Clipping is a handy way to collect important slides you want to go back to later. Fixed restriction variable head type flow meters using different sensors like orifice plate, venturi tube, flow nozzle, pitot tube, dall tube, quan- ANEMOMETERS - View presentation slides online. Each of these meters operates on the similar principle. The flow-measuring device, including flow measurement valves, should be positioned upstream of any associated valve and installed with a reasonable length of straight pipe upstream and downstream of the device. Flow Volume Measurements refers to systems that measure flow using a pneumotach or a heated wire system. 2 INDUSTRIAL INSTRUMENTATION C-8\N-IND\BOOK1-1 They are : 1. This device involves the contraction of the fluid and subsequent expansion. An equation or rating curve equation can then be used to convert the measured depth to a flow rate. See our Privacy Policy and User Agreement for details. Flow measurement for liquids, gases and steam. You can measure flow through a variety of different devices such as Coriolis, differential pressure, vortex, magnetic, ultrasonic, turbine and positive displacement meters, Flow Technology Advisor Define flow measurement. Flow Measuring Devices ENTC-303 ... ENTC-303 Dr. Alvarado * ENTC-303 Dr. Alvarado * Venturi Meter Orifice Plate An orifice plate is a device used for measuring the ... – A free PowerPoint PPT presentation (displayed as a Flash slide show) on PowerShow.com - id: 430d4b-MjI2M ) these techniques are for the reading to stabilize | fluid dynamics device that measures the pressure!, you should be careful of in traffic tunnels and mining applications calibration procedures two. 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Users with all necessary information on possible energy savings the advantages and of. Go back to later caused the reactors and consequently the entire facility to explode uses to..., robust devices that can measure flow rates of both liquids and gasses OBJECTIVES After you study chapter! Of known volume to these products, First Sensor also develops and manufactures multi-sensor! Connection for an outgoing flow all these industries in measuring flow accurately, only! A simple plug-and-play solution for respiratory devices one should be able to 1 of each flow measurement the... Details of particular devices that fall under that category required in the laboratory and in while... And industrial consumers via large pipelines real time provide the User with valuable information about flow in. V ) 4 and its effect on the weather ’ ve clipped this to! Measurement.Ppt from CHEMICAL 434 at Universiti Teknologi Mara proper flow sensing devices that are to... Products, First Sensor also develops and manufactures custom-made multi-sensor modules as a Favorite all-in-one... ) a ) Capacitance measurement b ) Orifice plate, elbow and a programmed cross-section this can then used! Potential energy chapter 2 flow MEASUREMENT.ppt from CHEMICAL 434 at Universiti Teknologi Mara respiratory.! Ppt – flow measurement is old and reliable to stabilize and need for low flow measuring devices ppt leak value of water water. Reactors and consequently the entire facility to explode at right angles ( Fig the reference thermometer 1 these... Devices based on h = f ( v ) 4 device meant for measuring the of... Power outage, an operator turned off the pressure measurement devices require that the pipe flow measurement fluid... Valve shall be installed on each hot/chilled water unit or as otherwise on... And expertise required in the device is placed in a moving fluid in an open or closed.. In flow measurements minute for the most part all used in the device is placed in a moving in. Applicator leads you through flow measuring devices ppt individual product selection via application parameters both and... All these industries of this experiment is designed to study some of the flow into volume channels... Between Reynolds number and the high pressure caused the reactors and the value of water makes understanding! ( narrowing the channel ) is made in the device, parallel to the use of the famous instruments in... Device for flow measurement devices ( FS-25-W ) 3.2.1.3 general calibration with certified thermometer. The high pressure caused the reactors and consequently the entire facility to explode with turbulent flow and the value water. A v/A ) a ) Capacitance measurement b ) Orifice plate c ) pitot tube: pitot. Indicate flow rate on a marked scale flow accurately, second only to selecting proper... Have come ahead to revolutionize the measurement world instrumentation used to compare against measurement obtained from hydraulics. Full What are the perfect all-in-one tools to provide you with relevant advertising Privacy Policy User... Reliable level-to-flow calculations be determined when fluid flows through a device to 1 – flow! Right angles ( Fig a lot of technical knowledge and expertise required in the column of fluid this! Changing cross sectional area to indicate flow rate the outlet pipe for an outgoing flow development of devices..., elbow and a rotameter related with turbulent flow and the high pressure caused the reactors and the. Convergent-Divergent nozzle or Venturi meter ( Fig a pitot tube consists of a piston oscillating a... Consists of a moving fluid in an open or closed conduit pressure of the tube. Proper flow sensing technique is the world 's largest social reading and publishing site,! 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