Friction pressure drop (packed screens) 3. 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. Presentation Summary : In laminar flow, the fluid moves smoothly in orderly layers, with little or no mixing of the fluid across the flow stream. Flow Measurement Devices Increasing utilization and the value of water makes the understanding of water measuring techniques important and necessary. These measurement devices have come ahead to revolutionize the measurement world. Microsoft office software free download 2003 full version. In contrast to many other working principles, the pressure loss resulting from our consumption measurement method is negligible. Cryogenic flow metering techniques 1. << Click on image to enlarge. The device is placed in a moving liquid with the lower opening directed in the upstream direction. Acoustic flow meters based on Doppler effect 5. FLOW MEASURING DEVICES The unique “cryogenic” features have to do with instrumentation used to detect signal and need for low heat leak. 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. Hot wire anemometers based on h = f(v) 4. If you continue browsing the site, you agree to the use of cookies on this website. Industrial flow measurement Industrial flow measurement Basics and practice D184B075U02 Rev. Flow Measuring Device # 2. Fixed restriction variable head type flow meters using different sensors like orifice plate, venturi tube, flow nozzle, pitot tube, dall tube, quan- 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. Measuring liquid flow in channels is a unique challenge requiring specialized technology – and Siemens delivers. 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. Search Search. Pressure drop devices based on Bernoulli Principle a) Venturi b) Orifice plate c) Pitot tube 2. 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. Is related with turbulent flow and the restriction the devices makes to the flow. Integration is a process whereby flow (ie: volume per unit of time) at small intervals (time) is converted into volume and the volume See our User Agreement and Privacy Policy. Lowering the bottom of the channel; 3. Displaying flow measurement devices PowerPoint Presentations. 1.1 Types of flow measurement devices Fluid flow devices fall into a number of device categories as well as fluid classes. Applicator leads you through an individual product selection via application parameters. Voodooing. Flow meter is a device that measures the rate of flow or quantity of a moving fluid in an open or closed conduit. The position of the float indicates the flow rate on a marked scale. There is a lot of technical knowledge and expertise required in the development of these devices. Yule's River measurement techniques. The orifice meter, the nozzle meter, and the Venturi meter are the most common devices used to measure the instantaneous flowrate. Scribd is the world's largest social reading and publishing site. A common device for flow measurement is the convergent-divergent nozzle or Venturi meter (Fig. en Change Language. FLOW MEASUREMENT CHAPTER 2 OBJECTIVES After you study this chapter, you should be able to 1. Ultrasonic gas flow meters from SICK quality that pays for itself. Accurate flow measurement is very important for proper and equitable distribution of water among water users. 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 Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. PPT – FLOW MEASUREMENT PowerPoint presentation | free to view - id: 10286e-ZDc1Z. You can measure flow through a variety of different devices such as Coriolis, differential pressure, vortex, magnetic, … Flow Measuring Devices. Define flow measurement. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Pneumotachs and heated wire systems are flow sensing devices that are used to integrate flow into volume. Clipping is a handy way to collect important slides you want to go back to later. Flow measurement for liquids, gases and steam. Sign In Join. 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 … Measurement is the key principle and input for all these industries. Flow Measurement Devices Increasing utilization and the value of water makes the understanding of water measuring techniques important and necessary. 22e) Ppt – basic flow measurement powerpoint presentation | free to. We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. The experiment is designed to study uniform water flow over a range of flow rates. 18.6). Download Share Share. Critical flow in open channels can be created by three means: 1. 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. The Adobe Flash plugin is needed to view this content. Types of Flow Measurement devices Fluid flows up through the tapered tube and suspends a ‘float’ in the column of fluid. Within these two 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. Flow velocity measuring devices from SICK are used to measure air flow in traffic tunnels and mining applications. Variable Area Flow Meters Basics and Practices, No public clipboards found for this slide. See our Privacy Policy and User Agreement for details. 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. Our product finder helps you to search for suitable measuring devices, software or system components via product characteristics. Note: pipe flow measurement devices require that the pipe flow full What are the most commonly used? measuring devices. Looks like you’ve clipped this slide to already. We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. 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. 2. Numerous practical details provide the user with valuable information about flow metering in industrial applications. Measuring liquid flow in channels is a unique challenge requiring specialized technology – and Siemens delivers. Mechanical type flow meters. flow-measuring devices commonly used in the laboratory and in industry while performing calibration procedures. 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). Accurate Flowmeters & Instrumentation Pvt. Steam filled the reactors and the high pressure caused the reactors and consequently the entire facility to explode. Void fraction measurement (A v/A) a) Capacitance measurement b) Optical characterization 2. This device involves the contraction of the fluid and subsequent expansion. 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