Academic literature on the topic 'Pressure differential meter'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Pressure differential meter.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Journal articles on the topic "Pressure differential meter"
1
Xie, Shuang Wei, Jing Zhe Gao, Zi Tong Wen, Li De Fang, Xiang Jie Kong, and Fang Dong. "The Optimal Design of the New Tube Inside and Outside Differential Pressure Flow Meter." Applied Mechanics and Materials 541-542 (March 2014): 1283–87. http://dx.doi.org/10.4028/www.scientific.net/amm.541-542.1283.
Full textAbstract:
Differential pressure flow meter is a kind of very promising flow measuring instrument, the application range is very wide. But aiming at the defects that the mechanical structure of all kinds of existing flow meters is complex, the throttling way disturbs the fluid greatly and the stability of differential pressure signal is insufficient, a kind of new inside and outside tube differential pressure flow meter was designed.
2
Shin, Kyu-Sik, Sangwoo Song, Kyungil Lee, Daesung Lee, and Jae Pil Jung. "Fabrication of Single Capacitive type Differential pressure sensor for Differential Flow meter." Journal of the Microelectronics and Packaging Society 24, no. 1 (2017): 51–56. http://dx.doi.org/10.6117/kmeps.2017.24.1.051.
Full text
3
高, 晓东. "Hequ Power Plant Coal Mill Differential Pressure Level Meter." Advances in Energy and Power Engineering 05, no. 01 (2017): 7–12. http://dx.doi.org/10.12677/aepe.2017.51002.
Full text
4
Duan, Quan Sheng, and Li Cui Wang. "Research on the Vortex Mass Flow Meter of Dual Bluff Body Based on Differential Pressure Principle." Applied Mechanics and Materials 401-403 (September 2013): 1110–13. http://dx.doi.org/10.4028/www.scientific.net/amm.401-403.1110.
Full textAbstract:
The lower limit of the existing vortex mass flow meter based on differential pressure is high. So the application of the existing vortex mass flow meter is limited in the measurement for low flow rate. This paper proposes a method using vortex mass flow meter of dual bluff body based on differential pressure principle. The differential pressure signal between the upstream and downstream can be amplified by the vortex overlap caused by the dual bluff body structure. The results of the simulation by Fluent show that this method can reduce the lower limit of measurement, and improve the measurement sensitivity effectively.
5
Pope, Jesse M., Steven L. Barfuss, Michael C. Johnson, and Zachary B. Sharp. "Effects of Pipe Wall Offsets on Differential Pressure Meter Accuracy." Journal - American Water Works Association 107, no. 6 (2015): E313—E320. http://dx.doi.org/10.5942/jawwa.2015.107.0081.
Full text
6
Steven, Richard. "Horizontally installed cone differential pressure meter wet gas flow performance." Flow Measurement and Instrumentation 20, no. 4-5 (2009): 152–67. http://dx.doi.org/10.1016/j.flowmeasinst.2008.06.002.
Full text
7
Teyssandier, R. G., and Z. D. Husain. "Experimental Investigation of an Orifice Meter Pressure Gradient." Journal of Fluids Engineering 109, no. 2 (1987): 144–48. http://dx.doi.org/10.1115/1.3242634.
Full textAbstract:
Wall and plate pressure gradients were investigated in a 3.5 in. (89 mm) air flow orifice meter facility for 3 orifice plates covering a pipe Reynolds number range of 21,000 to 160,000. The influence of the orifice plate on the upstream wall pressure gradient extended to 0.62D location. It was also found that the pressure gradient is a weak function of the orifice plate β ratio. The downstream location of the minimum pressure point located at about 3.3 dam heights. The pressure gradient on the face of the orifice plate shows that the deflection calculation based on any differential pressure taps is conservative.
8
Adamski, Krzysztof, Bartosz Kawa, and Rafał Walczak. "3D Printed Flowmeter Based on Venturi Effect with Integrated Pressure Sensors." Proceedings 2, no. 13 (2018): 1509. http://dx.doi.org/10.3390/proceedings2131509.
Full textAbstract:
In this paper we present a 3D printed flow meter based on venturri effect. Dimensions of the microchannels are 800 µm for wider and 400 µm for thinker channel. Application of different type of sensors was investigated: differential, absolute and digital barometer. Results of measurement of differential pressure and calculation of liquid flow are shown. Presented microfluidics device can be also easy adapted for modular systems. Presented flow meter is the first integration of commercial available sensors and 3D printed microfluidics structure in a single chip.
9
Yadav, Amar Prasad, Fumiyuki Suzuki, Atsushi Nishikata, and Tooru Tsuru. "Investigation of atmospheric corrosion of Zn using ac impedance and differential pressure meter." Electrochimica Acta 49, no. 17-18 (2004): 2725–29. http://dx.doi.org/10.1016/j.electacta.2004.01.033.
Full text
10
Pellegrini, S. P., A. N. Wrasse, M. J. da Silva, R. E. M. Morales, F. C. Trigo, and J. L. Baliño. "Model analysis for differential pressure two-phase flow rate meter in intermittent flow." Flow Measurement and Instrumentation 81 (October 2021): 102017. http://dx.doi.org/10.1016/j.flowmeasinst.2021.102017.
Full textDissertations / Theses on the topic "Pressure differential meter"
1
Ilunga, Luc Mwamba. "Performance of a symmetrical converging-diverging tube differential pressure flow meter." Thesis, Cape Peninsula University of Technology, 2014. http://hdl.handle.net/20.500.11838/1029.
Full textAbstract:
Thesis submitted in fulfilment of the requirements for the degree
Master of Technology: Civil Engineering
in the Faculty of Engineering
at the CAPE PENINSULA UNIVERSITY OF TECHNOLOGY
2014<br>The current problems of orifice, nozzle and Venturi flow meters are that they are
limited to turbulent flow and the permanent pressure drop produced in the
pipeline. To improve these inadequacies, converging-diverging (C-D) tubes were
manufactured, consisting of symmetrical converging and diverging cones, where
the throat is the annular section between the two cones, with various angles and
diameter ratios to improve the permanent pressure loss and flow measurement
range.
The objective of this study was firstly to evaluate the permanent pressure loss,
secondly to determine the discharge coefficient values for various C-D tubes
and compare them with the existing differential pressure flow meter using
Newtonian and non-Newtonian fluids, and finally to assess the performance of
these differential pressure flow meters.
The tests were conducted on the multipurpose test rig in the slurry laboratory at
the Cape Peninsula University of Technology. Newtonian and non-Newtonian
fluids were used to conduct experiments in five different C-D tube flow meters
with diameter ratios (β) of 0.5, 0.6 and 0.7, and with angles of the wall to the
axis of the tube (θ) of 15°, 30° and 45°.
The results for each test are presented firstly in the form of static pressure at
different flow rates. It was observed that the permanent pressure loss decreases
with the flow rate and the length of the C-D tube. Secondly, the results are
presented in terms of discharge coefficient versus Reynolds number. It was
found that the Cd values at 15° drop earlier than at 30° and 45°; when viscous
forces become predominant, the Cd increases with increasing beta ratio. The Cd
was found to be independent of the Reynolds number for Re>2000 and also a
function of angle and beta ratio.
Preamble
Performance of a symmetrical converging-diverging tube differential pressure
flow meter
Finally, the error analyses of discharge coefficients were assessed to determine
the performance criteria. The standard variation was found to increase when the
Reynolds number decreases. The average discharge coefficient values and their
uncertainties were determined to select the most promising C-D tube geometry.
An average Cd of 0.96, with an uncertainty of ±0.5 % for a range of Reynolds
numbers greater than 2,000 was found.
The comparison between C-D tubes 0.6(15-15) and classical Venturi flow meters
reveals that C-D 0.6(15-15) performs well in turbulent range and shows only a
slight inaccuracy in laminar.
This thesis provides a simple geometrical differential pressure flow meter with a
constant Cd value over a Reynolds number range of 2000 to 150 000.
2
Camapum, Filho Nicanor Alencar. "Avaliação de medidores com múltiplas tomadas de pressão na macromedição em sistemas de água /." Ilha Solteira : [s.n.], 2007. http://hdl.handle.net/11449/98100.
Full textAbstract:
Orientador: Milton Dall'Aglio Sobrinho<br>Banca: Fernando Braz Tangerino Hernandez<br>Banca: Paulo Kroeff de Souza<br>Resumo: Este trabalho teve o objetivo de avaliar os medidores de vazão com uma ou múltiplas tomadas de pressão em sistemas de água. Esses medidores de vazão são de fácil construção, utilizando materiais de baixo custo, podem ser instalados em locais que apresentem perfis de velocidades axialmente assimétricos em decorrência da existência de singularidades e/ou incrustações internas. Este estudo também foi idealizado para auxiliar os programas de redução de perdas físicas de água, uma vez que existe uma demanda reprimida na instalação de medidores de vazão em redes públicas de abastecimento. O trabalho foi desenvolvido em escala real nas instalações da ETA de Presidente Prudente-SP que abastece a zona de distribuição denominada de Alto ETA. Como padrão de medição foi utilizado um tubo de Pitot do tipo Cole, calibrado em túnel de vento pelo IPT. Além da aferição em diversos perfis de velocidade, medidores de múltiplos furos foram instalados em vários locais da rede, o que proporcionou uma verificação do comportamento do medidor em relação à variação do tipo de materiais e diâmetros das redes de abastecimento e uma avaliação geral do seu emprego em condições reais de uso em sistemas de abastecimento público. Os resultados demonstram que o medidor multifuros foi menos sensível à variação do perfil de velocidades, ou seja, a utilização da curva de calibragem obtida em condições ideais numa situação de perfil assimétrico levou a erros de medição menores que os obtidos com medidor de tomada única. A possibilidade de contar com um medidor de vazão adequado às condições brasileiras, de baixo custo e facilidade de construção, abre perspectivas para alavancar os programas de redução de perdas físicas de água, uma vez que existe uma grande demanda reprimida na instalação de medidores de vazão em redes de abastecimento público.<br>Abstract: This work had the objective of evaluating the flow meters with one or multiple orifices in water supply systems. Those flow meters are of easy construction, using inexpensive materials, and can be installed in places that present asymmetric velocity profiles as a consequence the existence of singularities and internal incrustations. This study was also conceived to aid the programs of reduction of physical losses of water, since a repressed demand for flow meters exists in water distribution systems. The work was developed in real scale in the Water Treatment Station - ETA of Presidente Prudente city-SP, that provisions the zone of distribution denominated High ETA. The measurement standard was a Pitot-Cole meter calibrated in wind tunnel by IPT. Besides calibration in several velocity profiles, meters of multiple orifices were installed at several places of the net, that provided a verification of the behavior of the meter related to the variation of the type of material and diameters of water distribution systems and a general evaluation of its employment in real conditions of use in public supply systems. The results demonstrate that the multi-port meter was less sensitive to the variation of the velocity profiles, in other words, the use of the calibration curve obtained in ideal conditions in a situation of asymmetric velocity profiles, led to smaller measurement errors than that obtained with a meter of only one orifice. The possibility to count on a flow meter adequate to the Brazilian conditions, inexpensive and easily constructed, opens perspectives for support the programs of reduction of physical losses of water, since there is a great unsatisfied demand for flow meters in water public supply systems.<br>Mestre
3
Camapum, Filho Nicanor Alencar [UNESP]. "Avaliação de medidores com múltiplas tomadas de pressão na macromedição em sistemas de água." Universidade Estadual Paulista (UNESP), 2007. http://hdl.handle.net/11449/98100.
Full textAbstract:
Made available in DSpace on 2014-06-11T19:29:13Z (GMT). No. of bitstreams: 0
Previous issue date: 2007-11-27Bitstream added on 2014-06-13T20:59:27Z : No. of bitstreams: 1
camapumfilho_na_me_ilha.pdf: 1741621 bytes, checksum: 8d03cd3c15e2515c463152711b059b6c (MD5)<br>PROPG<br>Este trabalho teve o objetivo de avaliar os medidores de vazão com uma ou múltiplas tomadas de pressão em sistemas de água. Esses medidores de vazão são de fácil construção, utilizando materiais de baixo custo, podem ser instalados em locais que apresentem perfis de velocidades axialmente assimétricos em decorrência da existência de singularidades e/ou incrustações internas. Este estudo também foi idealizado para auxiliar os programas de redução de perdas físicas de água, uma vez que existe uma demanda reprimida na instalação de medidores de vazão em redes públicas de abastecimento. O trabalho foi desenvolvido em escala real nas instalações da ETA de Presidente Prudente-SP que abastece a zona de distribuição denominada de Alto ETA. Como padrão de medição foi utilizado um tubo de Pitot do tipo Cole, calibrado em túnel de vento pelo IPT. Além da aferição em diversos perfis de velocidade, medidores de múltiplos furos foram instalados em vários locais da rede, o que proporcionou uma verificação do comportamento do medidor em relação à variação do tipo de materiais e diâmetros das redes de abastecimento e uma avaliação geral do seu emprego em condições reais de uso em sistemas de abastecimento público. Os resultados demonstram que o medidor multifuros foi menos sensível à variação do perfil de velocidades, ou seja, a utilização da curva de calibragem obtida em condições ideais numa situação de perfil assimétrico levou a erros de medição menores que os obtidos com medidor de tomada única. A possibilidade de contar com um medidor de vazão adequado às condições brasileiras, de baixo custo e facilidade de construção, abre perspectivas para alavancar os programas de redução de perdas físicas de água, uma vez que existe uma grande demanda reprimida na instalação de medidores de vazão em redes de abastecimento público.<br>This work had the objective of evaluating the flow meters with one or multiple orifices in water supply systems. Those flow meters are of easy construction, using inexpensive materials, and can be installed in places that present asymmetric velocity profiles as a consequence the existence of singularities and internal incrustations. This study was also conceived to aid the programs of reduction of physical losses of water, since a repressed demand for flow meters exists in water distribution systems. The work was developed in real scale in the Water Treatment Station - ETA of Presidente Prudente city-SP, that provisions the zone of distribution denominated High ETA. The measurement standard was a Pitot-Cole meter calibrated in wind tunnel by IPT. Besides calibration in several velocity profiles, meters of multiple orifices were installed at several places of the net, that provided a verification of the behavior of the meter related to the variation of the type of material and diameters of water distribution systems and a general evaluation of its employment in real conditions of use in public supply systems. The results demonstrate that the multi-port meter was less sensitive to the variation of the velocity profiles, in other words, the use of the calibration curve obtained in ideal conditions in a situation of asymmetric velocity profiles, led to smaller measurement errors than that obtained with a meter of only one orifice. The possibility to count on a flow meter adequate to the Brazilian conditions, inexpensive and easily constructed, opens perspectives for support the programs of reduction of physical losses of water, since there is a great unsatisfied demand for flow meters in water public supply systems.
4
Justo, Hernandez Ruiz. "Low differential pressure and multiphase flow measurements by means of differential pressure devices." Diss., Texas A&M University, 2004. http://hdl.handle.net/1969.1/1077.
Full textAbstract:
The response of slotted plate, Venturi meter and standard orifice to the presence of two phase, three phase and low differential flows was investigated. Two mixtures (air-water and air-oil) were used in the two-phase analysis while a mixture of air, water and oil was employed in the three-phase case. Due to the high gas void fraction (α>0.9), the mixture was considered wet gas. A slotted plate was utilized in the low differential pressure analysis and the discharge coefficient behavior was analyzed. Assuming homogeneous flow, an equation with two unknowns was obtained for the multi-phase flow analysis. An empirical relation and the differential response of the meters were used to estimate the variables involved in the equation. Good performance in the gas mass flow rate estimation was exhibited by the slotted and standard plates for the air-water flow, while poor results were obtained for the air-oil and air-water oil flows. The performance of all the flow meter tested in the analysis improved for differential pressures greater than 24.9 kPa (100 in_H2O). Due to the tendency to a zero value for the liquid flow, the error of the estimation reached values of more than 500% at high qualities and low differential pressures. Air-oil and air-water-oil flows show that liquid viscosity influences the response of the differential pressure meters. The best results for high liquid viscosity were obtained in the Venturi meter using the recovery pressure for the gas flow estimation at differential pressures greater than 24.9 kPa (100 in_H2O). A constant coefficient Cd was used for the low differential pressure analysis and results did show that for differential pressure less than 1.24 kPa (5 inH2O) density changes are less than 1% making possible the incompressible flow assumption. The average of the computed coefficients is the value of Cd.
5
Shakir, Ali M. "A prototype multifunction differential pressure-flow sensor for medical and industrial applications." Diss., Online access via UMI:, 2009.
Find full textAbstract:
Thesis (Ph. D.)--State University of New York at Binghamton, Thomas J. Watson School of Engineering and Applied Science, Department of Systems Science and Industrial Engineering, 2009..<br>Includes bibliographical references.
6
林雨萱. "Development of a Hydraulic Flow-meter Based on Differential Pressure Method." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/12438358921360775560.
Full textAbstract:
碩士<br>逢甲大學<br>自動控制工程學系<br>102<br>This study focused on flow-meter system by differential pressure type to do research and production. The research priorities will focus on the development of a set of traffic for the sensing system, which covers the establishment of a water system and differential pressure measurement system. In terms of motor control side, giving DC submerged motor pulse width modulation signal, which causes changes in the different flows. In the measurement side, the use of self-orifice plate structure resulting in a change in fluid flow tube pressure difference changes. Obtain a voltage signal by a differential pressure sensor. Then computing and processing data via the microcontroller. Finally, the liquid flow is displayed on the LCD.
The experimental results found in this study, the design of the orifice plate, as expected, the use of differential pressure sensing device can measure liquid flow. In the analysis section, the use of different flow Reynolds number size as separated state. With fragments of different flow patterns do linear regression analysis. Finally, based on the regression equation to calculate the flow rate is displayed as a microprocessor internal correspondence.
Books on the topic "Pressure differential meter"
1
Spitzer, David W. The consumer guide to differential pressure flow transmitters. 2nd ed. Copperhill and Pointer, 2008.
Find full text
2
Spitzer, David W. The consumer guide to differential pressure flow transmitters. Copperhill and Pointer, 2003.
Find full text
3
American Gas Association. Differential Pressures above 100 Inches Water Column Task Group. Guidelines for using high differential pressures for measuring natural gas with orifice meters. American Gas Association, 1999.
Find full textBook chapters on the topic "Pressure differential meter"
1
Oriakhi, Christopher O. "Liquids and Solids." In Chemistry in Quantitative Language. Oxford University Press, 2009. http://dx.doi.org/10.1093/oso/9780195367997.003.0016.
Full textAbstract:
The atoms or molecules in a liquid have enough kinetic energy to partially overcome the forces of attraction between them. Therefore, they are in constant random motion (as in a gas) but they are still relatively close together. However, they are not as tightly packed, or as well ordered, as in a solid. There is not as much free space in a liquid as in a gas. The atoms or molecules may aggregate together to form chains or rings that readily move relative to one another; this gives a liquid its fluid (flow) properties. Liquids generally occur as compounds. For example, water, ethanol, and carbon tetrachloride are liquids at room temperature. However, a few elements are also liquids at room temperature: bromine, cesium, gallium, mercury, and rubidium. A liquid is characterized by the following physical properties: boiling point and freezing point, density, compressibility, surface tension, and viscosity. These properties of a liquid are greatly influenced by the strength of its intermolecular forces. In summary: • Liquids have definite volume but no definite shape. They take on the shape of their containers. • Liquids are characterized by low compressibility, low rigidity, and high density relative to gases. • Liquids diffuse through other liquids. • Liquids can vaporize into the space above them and produce a vapor pressure. Polar molecules possess an electric dipole moment, μ, defined as the product of the magnitude of the partial charges Q+ and Q− on the molecule and the distance r separating the charges. In mathematical terms, it is given by the equation: μ = Qr The unit for μ is debyes (D), and 1 D = 3.336×10−30 coulomb meter (C-m). No interatomic bonds are completely ionic. Knowing the dipole moment of a compound, though, lets us differentiate ionic from covalent bonds by calculating the percent ionic character for the bonds. The percent ionic character of a bond is found by comparing the measured dipole moment of the molecule of the type A−B with the calculated dipole moment for the 100% ionized compound A+B−.
Conference papers on the topic "Pressure differential meter"
1
Simatupang, Ahmad Marzuki, and Ruben Lalamentik. "Differential Pressure Cone Meter as Meter Solution in FPSO's Facilities." In SPE/IATMI Asia Pacific Oil & Gas Conference and Exhibition. Society of Petroleum Engineers, 2017. http://dx.doi.org/10.2118/186238-ms.
Full text
2
Evans, Russell, and Stephen A. Ifft. "Wet Gas Performance of Differential Pressure Flowmeters." In ASME/JSME 2007 5th Joint Fluids Engineering Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/fedsm2007-37665.
Full textAbstract:
Wet gas flow measurement is becoming vital to the natural gas production industry. New wells with marginal outputs cannot justify gas-liquid separation equipment and must transfer gas which contains some liquid volume. The flow measurement device on each well dictates the allocation earnings and must therefore provide gas flow measurement as accurately as possible. Several types of differential pressure based flowmeters are currently being used in wet gas flow measurement. DP based flowmeters share many performance characteristics in wet gas applications. However, studies have also found that there can be significant differences in the correlations between meter over reading and liquid content depending of the type of DP meter being tested. Emerson Process Management conducted a series of wet gas tests on a standard orifice plate, a V-Cone, a Venturi and two Rosemount conditioning orifice plates at the National Engineering Laboratory in Scotland (NEL). Previously, tests of conditioning orifice plates in wet gas were conducted at the Colorado Engineering Experiment Station, Inc. (CEESI). The work described in this paper is aimed at investigating the similarities and differences in the performance of these meter types in wet gas flows. Comparisons of these data to those from previous studies on the meter types tested are presented. Also, as a result of these studies, a general method for correcting the over-reading of DP-based, wet gas flowmeters using process measurements and the flow computing capabilities of modern multivariable DP transmitters was developed and is presented.
3
Swamy Hosur Satyamurthy, Kumar, Erik Timpson, and Walter Daniel Leon-Salas. "Experimental evaluation of an intravascular differential pressure flow meter using MEMS pressure sensors." In 2011 IEEE Sensors. IEEE, 2011. http://dx.doi.org/10.1109/icsens.2011.6127281.
Full text
4
Cui, Mingtao, and Tao Zhang. "Correction of Zero-Drift of Differential Pressure Flow Meters of ACME Facility." In 2014 22nd International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/icone22-31223.
Full textAbstract:
ACME facility (Advanced Core-cooling Mechanism Experiment) is a large-scale test facility used to validate the performance of passive core-cooling system under SBLOCA (Small Break Lost of Coolant Accident) for the CAP1400, an upgraded passive safety nuclear power plant of AP1000. To simulate the features of passive safety system properly, DELTABAR, a kind of differential pressure flow meter, is designed to measure different mass flow of ACME. Because of the low pressure loss of DELTABAR, Zero-Drift problem of differential pressure flow meters in ACME is amplified, and some of the measured values are distorted seriously. To minimize the influence of Zero-Drift, analysis on zero-drift phenomenon is made, and a compensation method is proposed. The method is applying to PBL flow meters, and the result shows that the method is applicable.
5
Mahalingam, Sakethraman, Gavin Munro, Muhammad Arsalan, and Victor Gawski. "Using an Adjustable Cone Meter to Measure Wet Gas." In SPE Annual Technical Conference and Exhibition. SPE, 2021. http://dx.doi.org/10.2118/206072-ms.
Full textAbstract:
Abstract When the gas flow rate of a well significantly changes, the flow rate can fall below that of the operating range of a traditional fixed size Venturi meter, necessitating the replacement of the original meter with one of a smaller size. However, with an adjustable cone meter, the internal reconfiguration feature allows it to automatically switch from high operating flow range to low operating flow range and there is no requirement to disassemble the meter from the flow line assembly. Adjustable cone meters were designed, developed and tested at the wet-gas flow loop at National Engineering Laboratory in East Kilbride, Scotland. After calibrating the meter with dry nitrogen gas, the meter was tested with increasing amounts of liquid being injected into the flowline, upstream of the meter. The liquid caused the differential pressure measurement on the meter to over-read. Based on the differential pressure measurements under varying flow conditions, algorithms were developed to measure the dry gas and liquid fraction. The data obtained from the tests such as differential pressure, pressure, temperature, liquid density were used to build an over-reading model of the meter and a liquid fraction estimation model based on pressure loss ratio derived from an additional differential pressure measurement. The model was used to not only to quantify the gas and liquid flow rates but also the estimated error in each measurement. The measurements show that the Adjustable Cone meter is able to provide low uncertainty in both dry and wet gas conditions and offers a turndown ratio of up to 54:1 in dry gas conditions. In addition, the automatic adjustment of the meter from high flow to low flow positions avoids the need for manual intervention that involves additional risk and cost.
6
Paladino, Emilio E., and Clovis R. Maliska. "The Effect of the Slip Velocity on the Differential Pressure in Multiphase Venturi Flow Meters." In 2002 4th International Pipeline Conference. ASMEDC, 2002. http://dx.doi.org/10.1115/ipc2002-27099.
Full textAbstract:
Venturi tubes and orifice plates are devices largely used in the petroleum industry for measuring multiphase flows. In the project and calibration of these flow meters, the homogeneous model is commonly used. This model calculates the velocity and pressure drop of the mixture using correlations for single phase flow with a modified viscosity and density to account for the presence of the other phase, but no consideration is made about the relative velocity between the phases. However, the pressure difference, the measuring variable in these flow meters, is known to be affected by the relative velocity between phases, which becomes more and more important when the flow mixture accelerates. This paper addresses this issue and aims to demonstrate the importance of the slip velocity in the calculation of the flow velocity in a venturi meter. For this purpose, pressure-difference values obtained using the two-fluid model based on an Eulerian-Eulerian approach for the multiphase flow are compared with the results of the homogeneous model and with experimental data. Both theoretical calculations are performed using the CFX4.4 package, code which solves multidimensional multiphase flows. Considerations about the two-fluid model are presented, focusing, in particular, on the effects of the stress tensor in the dispersed phase. Considerations regarding the two-dimensional nature of the flow are also made. Test cases are presented in order to determine the dependency of the differential pressure with void fraction and slip velocity.
7
He, Denghui, and Bofeng Bai. "Two-Phase Pressure Drop Prediction in Wet Gas Flow Through V-Cone Meter." In ASME 2014 4th Joint US-European Fluids Engineering Division Summer Meeting collocated with the ASME 2014 12th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/fedsm2014-21126.
Full textAbstract:
The pressure drop is considerably significant for the differential pressure meter to measure the flow rate of the two-phase flow. Little is known about the pressure drop characteristics of the V-Cone meter when it is used to measure the wet gas flow. The objective of this paper is to investigate the two-phase pressure drop of the V-Cone meter and develop a correlation for predicting its pressure drop. A V-Cone meter with the equivalent diameter ratio of 0.55 was investigated experimentally. The experimental fluid was air and water. The test pressure ranged from 0.1 MPa to 0.4 MPa, and the gas and liquid mass flow rate ranged from 100 Nm3/h to 500 Nm3/h and from 0.05 m3/h to 2.2 m3/h, respectively. The experimental results showed that the existing correlations, which are developed for the orifice plate meter and the Venturi meter, are not applicable for the V-Cone meter to predict the pressure drop. The two-phase mass flow coefficient, K, was used to develop the two-phase pressure drop correlation. The influences of the Lockhart-Martinelli parameter, the gas densiometric Froude number and the operating pressure on K were investigated. The new pressure drop correlation can accurately predict the pressure drop of the V-Cone meter for the wet gas. The relative error of the pressure drop is less than ± 9.0% at the 95.1% confidence level and the average relative error is 3.88%. The pressure drop prediction correlation provides a reference for developing the correlation of the wet gas measurement.
8
Pedersen, Henrik C., Torben O. Andersen, Tobias Skouboe, and Morten S. Jacobsen. "Investigation and Comparison of Separate Meter-In Separate Meter-Out Control Strategies." In ASME/BATH 2013 Symposium on Fluid Power and Motion Control. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/fpmc2013-4480.
Full textAbstract:
In the later years, there has been an increased focus on new valve types, which yield the possibility to do Separate Meter-In Separate Meter-Out (SMISMO) control. This includes both digital valves, but proportional valves with separate metering spools and build in pressure sensors are also emerging. The possibility to independently control the meter-in and meter-out side not only increase the functionality of the system, but also opens up for better performance and/or lowered energy consumption. The focus of the current paper is therefore on investigation and comparison of what may be obtained using multivariable control strategies for SMISMO control of a single axis hydraulic system with a differential cylinder, when not taking other measures to improve performance. The paper first presents an experimentally verified model of the system considered, from which a linear model is derived. Based on the model, the control strategies are discussed and several H∞ controllers are designed, for which both simulation and experimental results are presented. The controllers are evaluated with regard to performance and robustness and compared to a simple SISO control. Based on the findings, the possibilities and limitations of the approach and the different controllers are outlined and discussed.
9
Song, Li, Gang Wang, Atul Swamy, and Gyujin Shim. "In-Situ Resistance Coefficient Curve and Experimental Analysis of a Virtual Chilled Water Flow Meter at Air Handling Unit Level." In ASME 2012 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/imece2012-87634.
Full textAbstract:
In this paper, a virtual Air handling unit (AHU) level water flow meter using a control valve as a measurement device is experimentally validated through two different sizes of control valves on cooling coils. The flow through the valve is indirectly calculated using in-situ valve resistance coefficient curve, differential pressure over both the valve and its associated coil and valve stem positions. It was concluded in previous studies that the in-situ valve resistance coefficient curve is critical for determining the accuracy of the virtual valve flow meter. In this paper, an experimental approach and a theoretical approach of obtaining the in-situ valve resistance coefficient curve are introduced and as a result, accuracy of the virtual valve flow meters, using two different sizes of control valves: a smaller valve with design water flow rate of 25GPM and a larger valve with design water flow rate of 300GPM, is compared with an ultrasonic meter. The comparison show less than 4% of error over the full measurement range.
10
King, Graeme, Chris Kedge, Xuelong Zhou, and Andrzej Matuszkiewicz. "Superhigh Pressure Dense Phase Arctic Pipelines Increase Reliability and Reduce Costs." In 2002 4th International Pipeline Conference. ASMEDC, 2002. http://dx.doi.org/10.1115/ipc2002-27302.
Full textAbstract:
Differential movement in permafrost terrain due to ground freezing or thawing challenges the reliability of buried pipelines proposed for transporting natural gas from Prudhoe Bay and the Mackenzie Delta. Arctic pipelines designed to operate at conventional pressures (that is, below 10 MPa) are susceptible to wrinkling, bulging, and ovalling due to the differential movements they cause at interfaces between frozen and unfrozen ground and between different types of soil. Arctic pipelines designed to operate at superhigh pressures—defined here as pressures above 25 MPa—can accommodate the differential movements. A fair comparison between large diameter artic pipelines with operating pressures in the range from 10 to 42 MPa was made by accurately simulating flow performance with Greenpipe’s PipeCraft™ software. For any given design flow, superhigh pressure dense phase pipelines have smaller diameters and thicker walls, making them more flexible and better able to handle differential movements. And at superhigh pressures, Joule-Thomson cooling is negligible so that flowing gas stays close to ground temperature, reducing potential for frost heave or thaw settlement in the first place. Although weight per meter of superhigh pressure pipelines is similar to conventional pressure pipelines of similar flow capacity, increased flexibility means they are easier to lift and handle during construction. They also conform more easily to the terrain, resulting in less excavation and less pipe bending to make them fit the contours of the trench. The net result is reduced construction costs. When construction, maintenance and reliability are factored into the selection process, superhigh pressure dense phase pipelines provide a cost effective option for handling the challenges of arctic environments.