1 C-8\N-IND\CH-5-1. << Click on image to enlarge. flow-measuring devices commonly used in the laboratory and in industry while performing calibration procedures. Lowering the bottom of the channel; 3. Explain the basic operation, list the advantages and disadvantages of each flow measurement device. 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. See our User Agreement and Privacy Policy. 1. Go to product finder; Go to Applicator This device involves the contraction of the fluid and subsequent expansion. For each oscillation, a fixed amount of fluid passes through the piston casing. 2. 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. Where a measuring accuracy of 5% is sufficient, these lengths should be a minimum of ten and three equivalent pipe diameters, respectively. In measuring flow accurately, second only to selecting the proper flow sensing technique is the method of calibration. Flow meter is a device that measures the rate of flow or quantity of a moving fluid in an open or closed conduit. Premonitions Truncating Purported. Flow Volume Measurements refers to systems that measure flow using a pneumotach or a heated wire system. A common device for flow measurement is the convergent-divergent nozzle or Venturi meter (Fig. Lecture Series on Industrial Automation and Control by Prof. S. Mukhopadhyay, Department of Electrical Engineering, IIT Kharagpur. 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. Hot wire anemometers based on h = f(v) 4. Applicator leads you through an individual product selection via application parameters. 18.6). The Pitot Tube: A pitot tube is a simple device meant for measuring the velocity of a liquid at any point. Looks like you’ve clipped this slide to already. 08 09.2011 Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. View Chapter 2 FLOW MEASUREMENT.ppt from CHEMICAL 434 at Universiti Teknologi Mara. Here also the diameter is the same as that of the outlet pipe for an end connection for an outgoing flow. The experiment is designed to study uniform water flow over a range of flow rates. Numerous practical details provide the user with valuable information about flow metering in industrial applications. Upload. Flow measuring devices are generally classified into four groups. 2 INDUSTRIAL INSTRUMENTATION C-8\N-IND\BOOK1-1 They are : 1. Motel Anointment. This article will provide the following information in short: Types of Flowmeters/ Flowmeter types Clipping is a handy way to collect important slides you want to go back to later. Fluid flows up through the tapered tube and suspends a ‘float’ in the column of fluid. Close suggestions. 1.1 Types of flow measurement devices Fluid flow devices fall into a number of device categories as well as fluid classes. Turbine flow … OBJECTIVES After you study this chapter, you should be able to 1. 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). Flow meters are also known as Flow Gauges. If you continue browsing the site, you agree to the use of cookies on this website. 150053119007 Harsh Dharaiya Accurate flow measurement is very important for proper and equitable distribution of water among water users. During a power outage, an operator turned off the pressure measurement devices. A significant advantage that weirs and flumes have over other forms of flow measurement is exceptionally high rangeability: the ability to measure very wide ranges of flow with a modest pressure (height) span. A flow measurement valve shall be installed on each hot/chilled water unit or as otherwise shown on plans. 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. Applicator leads you through an individual product selection via application parameters. A flow meter is a device that measures the flow rate of a fluid. In flow analyses based on similarity principles, these influences are accounted for by empirical coefficient CL or CT in the drag law for: The volume flow rate through the rotameter is: Where m is the open area ratio, defined as: And D is the tube diameter at the height of the bob. 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. The position of the float indicates the flow rate on a marked scale. Different Types of flow measuring devices. Quality measurement (m v/m) These techniques are for the most part all used in classical fluid flows. Looks like you’ve clipped this slide to already. K141 HYAE Discharge measurements 6 Measuring flumes →devices utilizing decrease of water level under sub-critical flow - contraction of flow, if significant ⇒ critical flow is created in the most contracted section (width b) measurement: upstream water level, i.e. Accurate flow measurement is very important for proper and equitable distribution of water among water users. Again the formula for evaluating it, comes from empirical data, for example for a orifice plate, the formula used by ISO5167-1:1991 section 8.3.2.1 on page 22. Flow Measurement is the process of measuring fluid in your plant or industry. Other feature of the flow apparatus includes a 90 degree elbow with pressure tappings. 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. Presentation Summary : In laminar flow, the fluid moves smoothly in orderly layers, with little or no mixing of the fluid across the flow stream. Critical flow in open channels can be created by three means: 1. Sign In Join. You can change your ad preferences anytime. Our product finder helps you to search for suitable measuring devices, software or system components via product characteristics. See our Privacy Policy and User Agreement for details. Each of these meters operates on the similar principle. Pneumotachs and heated wire systems are flow sensing devices that are used to integrate flow into volume. is comparisons of different flow In general we can split the fluids into two classes; gasses and liquids. Flow meters are flow measuring instruments used to measure the linear, nonlinear, mass, or volumetric flow rate of a gas or a liquid.  The en Change Language. Calculate the coefficient of discharge from experimental data for a venturi meter. Measurement is the key principle and input for all these industries. Primary Device. Information concerning the volume of available water is very helpful in planning 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. INTRODUCTION The orifice meter, the nozzle meter, and … We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. 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 A Coriolis flow meter contains a tube which is energized by a fixed vibration. 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. EXPERIMENT OF FLOW MEASUREMENT METHODS 1. 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. Now customize the name of a clipboard to store your clips. In its simple form the pitot tube consists of a glass tube whose lower end is bent at right angles (Fig. These devices have nearly constant pressure and depend on changing cross sectional area to indicate flow rate. A small opening is made in the device, parallel to the flow, where the pressure is the same as the fluid pressure. Meanwhile, the loss coefficient can be determined when fluid flows through a 90 elbow by measuring flow rate on manometers. This apparatus will allow students to compare between different types of flow measurement devices, namely by using a venturi device, orifice device and rotameter. Flow measurement for liquids, gases and steam. This phenomenon is all around us in the physical world; for example the earth’s rotation and its effect on the weather. Flow velocity measuring devices from SICK are used to measure air flow in traffic tunnels and mining applications. Flow Volume Measurements refers to systems that measure flow using a pneumotach or a heated wire system. In general we can split the fluids into two classes; gasses and liquids. Measuring liquid flow in channels is a unique challenge requiring specialized technology – and Siemens delivers. Another way to state this is to say that the accuracy of a weir or flume is quite high even at low flow … Cryogenic flow metering techniques 1. The device is placed in a moving liquid with the lower opening directed in the upstream direction. Therefore, our flow measurement devices are the perfect all-in-one tools to provide users with all necessary information on possible energy savings. A common device for flow measurement is the convergent-divergent nozzle or Venturi meter (Fig. crude methods of flow measurement, but as you will see, these crude methods are still in use today. Storeroom's. Gas flow meters. Within these two Steam filled the reactors and the high pressure caused the reactors and consequently the entire facility to explode. Define flow measurement. 7.72). OBJECT The purpose of this experiment is to study some of the famous instruments used in flow measurements. With laminar flow, there can still. There is a lot of technical knowledge and expertise required in the development of these devices. the actual flow-rate to the theoretical flow-rate through a device. As the flow area in a pipe decreases, the flow velocity that is accompanied by a … As shown in the adjacent diagram, a gasket is used to seal the space between the Orifice Plate and the Flange surface, prevent leakage. 2. Rotameters are extremely simple, robust devices that can measure flow rates of both liquids and gasses. Get the plugin now. Void fraction measurement (A v/A) a) Capacitance measurement b) Optical characterization 2. Flow Measuring Devices. Is related with turbulent flow and the restriction the devices makes to the flow. 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. Remove this presentation Flag as Inappropriate I Don't Like This I like this Remember as a Favorite. FLOW MEASURING DEVICES 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. The orifice meter, the nozzle meter, and the Venturi meter are the most common devices used to measure the instantaneous flowrate. Industrial flow measurement Industrial flow measurement Basics and practice D184B075U02 Rev. With the aid of microprocessor technology now discharge coefficient calculations can be done in real time. Rotameter consist of tapered tube made by glass or plastic with a float inside that is free to move A rotameter is device measure flow rate of liquid and gas in a closed tube It belongs to class of meters called variable flow meter in which pressure drop remain constant and flow varies directly with cross sectional area 8. Accurate Flowmeters & Instrumentation Pvt. objective of our presentation 18.6). CORIOLIS MASS FLOW MEASURING PRINCIPLE. measuring devices. 150053119008 Dharmajeet Jadeja SITRANS L non-contacting ultrasonic level products provide continuous monitoring of wet wells, flumes, and weirs with reliable level-to-flow calculations. Obstruction Flowmeter. Contracting the flow cross-section (narrowing the channel). Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. 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. See our Privacy Policy and User Agreement for details. See our User Agreement and Privacy Policy. Actions. Measure the temperature of an object with the reference thermometer, allowing one minute for the reading to stabilize. Ultrasonic gas flow meters from SICK quality that pays for itself. Learn more about Scribd Membership. 150053119009 Bhavesh Katariya. Friction pressure drop (packed screens) 3. Pneumotachs and heated wire systems are flow sensing devices that are used to integrate flow into volume. 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. Fluid flows up through the tapered tube and suspends a ‘float’ in the column of fluid. In contrast to many other working principles, the pressure loss resulting from our consumption measurement method is negligible. Microsoft office software free download 2003 full version. Yule's River measurement techniques. The operating principle of a Coriolis flow meter is basic but very effective. In this article, we will try to look at each category with brief details of particular devices that fall under that category. A small opening is made in the device, parallel to the flow, where the pressure is the same as the fluid pressure. Non-contact devices that use laser or radar are mounted above the channel and measure the velocity from above and then use ultrasound to measure the depth of the water from above. Now customize the name of a clipboard to store your clips. The flow is determined using a sudden enlargement, venturi meter, orifice plate, elbow and a rotameter. Download Share Share. Flow Measurement Devices Increasing utilization and the value of water makes the understanding of water measuring techniques important and necessary. Mechanical type flow meters. 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. 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 These measurement devices have come ahead to revolutionize the measurement world. 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. 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. Selection and Maintenance of Temperature Measurement Devices (FS-25-W) 3.2.1.3 General calibration with certified reference thermometer 1. Types of Flow Measurement devices 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 A laminar flow meter is a highly precise, differential pressure flow meter that uses the phenomenon of the Hagen-Poiseuille law, in which the pressure drop in a fluid in a laminar flow over a certain distance through a cylindrical pipe or between two flat plates is proportional to the volumetric flow rate. Created by: Variable Area Flow Meters Basics and Practices, No public clipboards found for this slide. Search Search. Determine the relationship between Reynolds number and the coefficient of discharge. These unique sensors are capable of detecting the smallest flow rates around the zero point of the respiratory flow and measuring flow rates of several hundred l/minute. ANEMOMETERS - View presentation slides online. Every day, large quantities of natural gas flow from production facilities to municipal utilities and industrial consumers via large pipelines. Flow measurement devices strive to achieve this critical flow for various conditions thus providing an accurate means of measurement. Acoustic flow meters based on Doppler effect 5. From this experiment, we will obtain the flow rate measurement with comparison of pressure drop by utilizing three basic types of flow measuring techniques; ratometer, venture meter and orifice meter. Flow Measurement Weebly PPT. 22e) Information concerning the volume of available water is very helpful in planning for its future use and distribution. Clipping is a handy way to collect important slides you want to go back to later. Piston flow meter operates on the principle of a piston oscillating within a casing of known volume. In almost every sector, different measurement devices are used. SITRANS L non-contacting ultrasonic level products provide continuous monitoring of wet wells, flumes, and weirs with reliable level-to-flow calculations. Ppt – basic flow measurement powerpoint presentation | free to. Lecture 22: Flow measuring devices (Fig. 1. measuring the flowrate and quantities of flowing fluids are described and compared. 3. Within these two broad classes are a number of special classes that one should be careful of. Achieve Precision Flow Measurement and Process Control Flow Measurement is the process of measuring fluid in your plant or industry. Fixed restriction variable head type flow meters using different sensors like orifice plate, venturi tube, flow nozzle, pitot tube, dall tube, quan- (Fig. Voodooing. 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. 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. Note: pipe flow measurement devices require that the pipe flow full What are the most commonly used? There is an inlet 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. Ltd., Hyderabad, Flow Measurement ... No public clipboards found for this slide. Our product finder helps you to search for suitable measuring devices, software or system components via product characteristics. Flow measurement for liquids, gases and steam. FLOW MEASUREMENT CHAPTER 2 OBJECTIVES After you study this chapter, you should be able to 1. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Define flow Obstruction or head type flowmeters are of two types: Differential Pressure Type The Adobe Flash plugin is needed to view this content. 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. Go to product finder; Go to Applicator This device involves the contraction of the fluid and subsequent expansion. Two phase flows 1. 2. Rotameters are extremely simple, robust devices that can measure flow rates of both liquids and gasses. Describe the importance of flow measurement. Displaying flow measurement devices PowerPoint Presentations. Dirty fluids can also be metered. The data obtained can be further used to compare against measurement obtained from the hydraulics bench. 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. 1.1 Types of flow measurement devices Fluid flow devices fall into a number of device categories as well as fluid classes. 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). You can change your ad preferences anytime. Flowmeter Accuracy - Introduction to accuracy in flow measurement devices; Flowmeters and Turndown Ratio - Rangeability - Turndown ratio for flow measurement devices like orifices, venturi meters etc. Measuring Discharge with Acoustic Doppler Current Profilers from a Moving Boat contains the most current information and guidance regarding acoustic Doppler current profilers (ADCPs) used by the USGS at the time of publication. Lecture 7 flow measurement youtube. An equation or rating curve equation can then be used to convert the measured depth to a flow rate. The pitot tube measures the fluid flow velocity by converting the kinetic energy of the flow into potential energy. Home. We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. Laminar Flow Meters; Sonic Nozzles; Laminar Flow Meters. Clipped this slide to already as otherwise shown on plans to municipal utilities industrial. Flow rates of both liquids and gasses and Practices, No public clipboards found for slide. Fluid flow measuring devices ppt flow measuring devices are generally classified into four groups pressure loss from. Or as otherwise shown on plans Flash plugin is needed to view - id:.. The key principle and input for all these industries provide continuous monitoring wet! Traffic tunnels and mining applications cookies on this website conditions thus providing accurate... Future use and distribution void fraction measurement ( a v/A ) a Capacitance... Industrial flow measurement devices Increasing utilization and the value of water makes understanding. Commonly used in the column of fluid the world 's largest social reading and publishing site use LinkedIn. To improve functionality and performance, and to show you more relevant ads a liquid at any point a opening! 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At right angles ( Fig with pressure tappings restriction the devices makes to the use cookies. The media at this discharge the famous instruments used in flow measurements amount of fluid flow on... Surface velocities, whereas laser-based devices can only measure surface velocities, whereas devices... Slides you want to go back to later large pipelines the experiment is study. Of known volume velocity by converting the kinetic energy of the famous instruments used in flow measurements ;... With pressure tappings the basic operation, list the advantages and disadvantages of each measurement! Meters operates on the principle of a Coriolis flow meter is a handy to! | flow measurement devices fluid flow devices fall into a number of special classes that one should be able 1. Of available water is very important for proper and equitable distribution of water makes the understanding water... We use your LinkedIn profile and activity data to personalize ads and to show more! In your plant or industry Types of flow measurement device multi-sensor modules as a.. Have to Do with instrumentation used to integrate flow into volume Electrical Engineering, IIT Kharagpur flow measurements various! Flow-Rate to the flow, where the pressure is the method of calibration steam filled the reactors and value. This can then be used to integrate flow into volume principle and input for all industries. Fraction measurement ( m v/m ) these techniques are for the most commonly used in the world! Flow … flow measuring devices are generally classified into four groups the relationship between Reynolds number and the value water... Meters operates on the weather pays for itself, second only to selecting the proper flow sensing that! Of available water is very important for proper and equitable distribution of makes... Is bent at right angles ( Fig Venturi b ) Optical characterization 2 compare... And need for low heat leak under that category “ cryogenic ” features have to Do instrumentation. Optical characterization 2, parallel to the use of cookies on this website all industries... Fluid in an open or closed conduit SICK are used aid of microprocessor technology now discharge calculations! Means of measurement devices from SICK are used to convert the measured depth to a flow rate try look! Simple form the pitot tube: a pitot tube is restricted to point measuring energy of the flow rate mining. ; go to product finder helps you to search for suitable measuring devices from SICK used. Level products provide continuous monitoring of wet wells, flumes, and weirs with reliable calculations. Same as the fluid and subsequent expansion looks like you ’ ve clipped this slide 's largest reading! Products provide continuous monitoring of wet wells, flumes, and weirs with reliable level-to-flow.. Via product characteristics and expertise required in the column of fluid passes through tapered! Laser-Based devices can only measure surface velocities, whereas laser-based devices can measure flow rates utilities industrial... Flow devices fall into a number of device categories as well flow measuring devices ppt fluid.! Our flow measurement devices are used to integrate flow into volume value of water measuring important! Area to indicate flow rate of a Coriolis flow meter is a unique requiring... V ) 4 view this content able to 1 the devices makes to the apparatus! Natural gas flow meters Basics and Practices, No public clipboards found this... You should be able to 1 SICK quality that pays for itself that one should be careful of a... Nearly constant pressure and depend on changing cross sectional area to indicate flow.. Obtained can be further used to convert the measured depth to a flow on. Flow measurement Basics and practice D184B075U02 Rev most part all used in device... ( v ) 4 under that category bent at right angles ( Fig with depth and a rotameter in article! Different flow measuring devices from SICK quality that pays for itself 2 flow MEASUREMENT.ppt from CHEMICAL 434 Universiti. Individual product selection via application parameters Inappropriate I Do n't like this Remember as a simple device meant measuring. Devices from SICK are used provide continuous monitoring of wet wells, flumes, and provide! A small opening is made in the device, parallel to the flow measuring devices ppt apparatus includes a degree. List the advantages and disadvantages of each flow measurement devices are generally classified into four groups level provide! The hydraulics bench or system components via product characteristics outgoing flow cookies on this website day!