Download or read book High accuracy Flow Rate Measurement for Water Supply and Dredged Slurry Transport Pipelines written by Trimbak Mukund Parchure and published by . This book was released on 1997 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High Accuracy Flow Rate Measurement for Water Supply and Dredged Slurry Transport Pipelines written by and published by . This book was released on 1997 with total page 165 pages. Available in PDF, EPUB and Kindle. Book excerpt: The conventional techniques for high-accuracy ultrasonic flow measurement using multiple chordal paths in a pipe require drilling holes in the pipe for inserting the sensors. Under the Construction Productivity Advancement Research (CPAR) program, a research project was jointly undertaken by ORE and the U.S. Army Corps of Engineers for development of a new flow meter. The product developed is an externally mounted acoustic flow meter. The advantages of the 'clamp-on' type flow meter are as follows: (a) no contact with the fluid, (b) no welding or cutting of pipe necessary, (c) no operational shutdown needed for installation, repairs, or maintenance, (d) quick and easy installation, and (c) low cost of installation. The technology consists of the following: (a) conformal phased array transducers applied to a prepared surface at four to six locations on the exterior of the pipeline, and (b) a signal processing unit that generates acoustic signals for transmission between pairs of transducers installed above; receives and time-compresses the signals; determines precise acoustic travel times between one or more transducer pairs; and employs these measured travel times to determine the flow rate using algorithms well known to the flow measurement industry. The transducers are constructed of a relatively new material, PVDF. This material is found to be ideal for a flexible production transducer easily installable in the field conforming to a variety of pipe exterior dimensions. The new meter is a differential travel-time acoustic meter. The system measures the difference in travel time between signals propagating upstream and downstream between multiple pairs of transducers. Under no-flow conditions the travel time in each direction will be the same.
Download or read book Energy and Water Development Appropriations for 1994 written by United States. Congress. House. Committee on Appropriations. Subcommittee on Energy and Water Development and published by . This book was released on 1993 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy and Water Development Appropriations for 1994 Department of the Army written by United States. Congress. House. Committee on Appropriations. Subcommittee on Energy and Water Development and published by . This book was released on 1993 with total page 540 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Slurry Flow written by C A Shook and published by Elsevier. This book was released on 2013-10-22 with total page 337 pages. Available in PDF, EPUB and Kindle. Book excerpt: Slurry Flow: Principles and Practice describes the basic concepts and methods for understanding and designing slurry flow systems, in-plan installations, and long-distance transportation systems. The goal of this book is to enable the design or plant engineer to derive the maximum benefit from a limited amount of test data and to generalize operating experience to new situations. Design procedures are described in detail and are accompanied by illustrative examples needed by engineers with little or no previous experience in slurry transport. The technical literature in this field is extensive: this book facilitates its use by surveying current research results and providing explanations of mechanistic flow models. This discussion of background scientific principles helps the practitioner to better interpret test data, select pumps, specify materials of construction, and choose measuring devises for slurry transport systems. The extensive range of topics covered in Slurry Flow: Principles and practice includes slurry rheology, homogeneous and heterogeneous slurry flow principles, wear mechanisms, pumping equipment, instrumentation, and operating aspects.
Download or read book Proceedings of the 5th International Symposium on Water Resource and Environmental Management written by Haoqing Xu and published by Springer Nature. This book was released on 2023-06-10 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is designed to be the introductory work in the new Sustainable Development of Water Resource and Environmental Management Series and provides an in-depth look at sustainable development and management in the water sector across. In the face of current global changes, the availability and quality of water resources are under severe threat. Indeed, in all sectors related to water resources management, sustainable development is important for present and future generations. This book includes selected papers from the 5th International Symposium on Water Resource and Environmental Management (WREM 2022) and consists of themes pertaining to water resource and environmental management. It provides readers with comprehensive information on the principles of sustainable water resources management, as well as recent advances, directions for future research, and policy development for sustainable water resources management. As a reference, it is of interest to students, scientists, engineers, government officials, and water resource managers.
Download or read book A Guide to Methods and Standards for the Measurement of Water Flow written by Gershon Kulin and published by . This book was released on 1975 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Flowmeters in Water Supply 2nd Ed M33 written by AWWA Staff and published by American Water Works Association. This book was released on 2011-01-12 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1990 with total page 622 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book MRIS Abstracts written by Maritime Research Information Service and published by . This book was released on 1972 with total page 1120 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Slurry Flow rate Measurement Using Correlation written by and published by . This book was released on 1979 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Existing methods of measuring the flow-rate of aerated slurries are briefly discussed, and this discussion is followed by a description of a new method that is based on the time it takes for a fluid to travel a fixed distance in a pipe. Random signals are derived from natural variations in the density of the fluid, and the progression of such disturbances in the direction of flow is measured by a technique involving the cross correlation of two signals. This technique is briefly explained, and the methods used in the locating and tracking of the main correlation peak are discussed. A new microprocessor-controlled, dual correlator that performs this function is described, as well as a simpler version for specific applications. Both use non-intrusive, ultrasonic transducers clamped to the pipe as a signal source.
Download or read book Ultrasonic Flow Measurement for Pipe Installations with Non ideal Conditions written by Devin M. Stoker and published by . This book was released on 2011 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the arid west, water is among the most valuable of resources. Typically, in order to successfully and accurately measure a flow rate using most types of flow meters, it is recommended that a straight section of pipe be installed immediately upstream from the flow meter to avoid distorted flow patterns and extreme turbulence at the metering location. In many field piping situations, however, such flow conditions are impossible to achieve. The performance of ultrasonic flow meters in non-ideal piping scenarios was studied using laboratory experiments and numerical Computational Fluid Dynamics models. A Fuji PortaflowX clamp-on transit-time ultrasonic flow meter was calibrated in the laboratory and performed well within the manufacturer's stated level of accuracy of [plus or minus] 1% for straight pipe. The ultrasonic flow meter was also used downstream of a single 12-inch long-radius elbow and the error in flow measurement resulting from the flow disturbance was measured. These tests were performed at four locations downstream of the elbow, at three orientations on the circumference of the pipe, and for three flow rates with Reynolds numbers ranging from 250,000 to 750,000. Using the same physical conditions, numerical models were built that utilized the realizable k- [epsilon] eddy viscosity model for turbulent flows. The resulting downstream velocity profiles from the numerical models were used to integrate the velocity of the flow across the ultrasonic signal path. The resulting velocity profiles were compared to similar profiles for fully developed flow to determine the error in flow measurement. The ultrasonic flow meter measurement errors downstream of the elbow were always negative, and were found to be as great as -16%. In general, the ultrasonic flow meter performed less accurately closer to the elbow due to the turbulent fluctuations and flow separation created by the elbow. A correction curve was applied to the results of this study, which provided a method to correct the ultrasonic flow measurement. By applying the correction equation to the laboratory ultrasonic flow meter measurements downstream of the elbow, the measurement error was reduced by nearly 90%. Computational Fluid Dynamics appears to be a viable tool for studying flow disturbances and making appropriate corrections for ultrasonic flow measurement in pipes.
Download or read book Slurry Transport Using Centrifugal Pumps written by K. C. Wilson and published by Springer Science & Business Media. This book was released on 2008-03-28 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: 1,1 Applications of Slurry Transport Vast tonnages are pumped every year in the form of solid-liquid mixtures, known as slurries. The application which involves the largest quantities is the dredging industry, continually maintaining navigation in harbours and rivers, altering coastlines and winning material for landfill and construction purposes. As a single dredge may be required to maintain a throughput of 7000 tonnes of slurry per hour or more, very large centrifugal pumps are used. Figures 1-1 and 1-2 show, respectively, an exterior view of this type of pump, and a view of a large dredge-pump impeller (Addie & Helmley, 1989). The manufacture of fertiliser is another process involving massive slur- transport operations. Li Florida, phosphate matrix is recovered by huge draglines in open-pit mining operations. It is then slurried, and pumped to the wash plants through pipelines with a typical length of about 10 kilometres. Each year some 34 million tonnes of matrix are transported in this manner. This industry employs centrifugal pumps that are generally smaller than those used in large dredges, but impeller diameters up to 1. 4 m are common, and drive capacity is often in excess of 1000 kW. The transport distance is typically longer than for dredging applications, and Chapter 1 Figure LI. Testing a dredge pump at the GIW Hydraulic Laboratory Figure 1. 2. Impeller for large dredge pump 1. Introduction 3 hence a series of pumping stations is often used. Figure 1-3 shows a boost- pump installation in a phosphate pipeline.
Download or read book Maritime Information Review written by and published by . This book was released on 1993 with total page 1080 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Slurry Systems Handbook written by Baha Abulnaga and published by McGraw Hill Professional. This book was released on 2002-04-29 with total page 634 pages. Available in PDF, EPUB and Kindle. Book excerpt: Publisher's Note: Products purchased from Third Party sellers are not guaranteed by the publisher for quality, authenticity, or access to any online entitlements included with the product. The most comprehensive resource on slurries and slurry systems, covering everything from fluid mechanics to soil classification, pump design to selection criteria Slurries are mixtures of liquids and solid particles of all types. For instance, liquid is used as a way of transporting what you get out of the mine, which might be better than shoveling it into freight cars and carrying it out by train. Slurry systems are fundamental to dredging, many mineral processes, bridge and tunnel construction, and to the manufacturer of synthetic petroleum products from oil sands.
Download or read book National Symposium on Contaminated Sediments Coupling Risk Reduction with Sustainable Management and Reuse Washington D C May 27 29 1998 written by and published by . This book was released on 1999 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal of the symposium was to promote discussion of the issues raised and recommendations presented in the National Research Council (NRC) report "Contaminated Marine Sediments in Ports and Waterways: Cleanup Strategies and Technologies," released in March 1997. Appendix D of the proceedings provides an Executive Summary of this NRC report. Although there are no simple solutions to the problems created by contaminated marine sediments, the problems can be managed effectively using a systematic, risk-based approach that incorporates incremental improvements in decision making, remediation technologies, and project implementation. Sponsors of the symposium were interested in educating and promoting dialogue among the diverse stakeholders involved in sediment management and in finding potential solutions. The material in the proceedings has been condensed and edited.
Download or read book National Symposium on Contaminated Sediments written by and published by . This book was released on 1999 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:
