Computational study of the tangential type turbine flowmeter

Wang, Zhen; Zhang, Tao

doi:10.1016/j.flowmeasinst.2007.11.003

Cited by 20 publications

(7 citation statements)

References 9 publications

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“…The oldest classes display the opposite behaviour, with a small number of meters that have retained very good performance with low starting flows, comparable to those of newer meters, and a large majority of meters with high starting flows. In fact, not all meter models deteriorate in 129 Discussion Paper | Discussion Paper | Discussion Paper | Discussion Paper | the same manner and therefore respond to past experiences in different ways (Zhen and Tao, 2008). Finally, classes such as class 4 that have small boxes with a wide distance between the extremes reflect the presence of outliers, i.e.…”

Section: Analysis Of the Relationship Between Meter Starting Flow Mementioning

confidence: 99%

Effects of network pressure on water meter under-registration: an experimental analysis

Fontanazza

Notaro

Puleo

et al. 2013

Preprint

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In water supply systems, a considerable amount of apparent loss is caused by meter under-registration. Water meters are subject to intrinsic systemic error depending on the actual flow rates passing through them. Furthermore, the moving parts of the meter are subject to wear and tear that progressively reduce meter accuracy. The increase in systemic error is especially evident at low flow rates because of growing friction in the rotating mechanism, which requires a higher flow to start the meter (starting flow). The aim of this paper is to experimentally investigate metering error in an attempt to find a direct link between meter age, network pressure and apparent losses caused by the inability of the meter to accurately register the volume passing though it at low flow rates. The study was performed through laboratory experiments in which worn-out water meters were tested using a test bench. The results of the laboratory experiments show that ageing and pressure are both relevant parameters for determining meter starting flow. These results were then applied to assess the effects on apparent losses of the age of the meter, varying pressure values upstream of the meter (the pressure in the network where the meter is installed) and different patterns of flow rates passing through the device (the consumption pattern of the user). The presented results are useful for understanding the effects of operating conditions on water meter under-registration, which can aid water managers in implementing effective replacement campaigns

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Section: Analysis Of the Relationship Between Meter Starting Flow Mementioning

confidence: 99%

Effects of network pressure on water meter under-registration: an experimental analysis

Fontanazza

Notaro

Puleo

et al. 2013

Preprint

View full text Add to dashboard Cite

show abstract

“…Because of technical design limitations, domestic meters are not capable of registering the exact amount of water consumed by a customer. Depending on its construction technology [11,12], diameter, consumption characteristics of the customer, or type of water distribution system [13,14], each water meter has specific measuring limitations [15,16]. This means that a percentage of the water actually consumed by a customer may not be registered.…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis of Ageing Single-Jet Water Meters for Measuring Residential Water Consumption

Arregui

Gavara²,

Soriano

et al. 2018

Water

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Single-jet meters are one of the most frequently used domestic meters that can be found in water distribution systems. Like any other water meter technology, they have significant metrological limitations that prevent them, even if recently installed, from measuring all water consumption of a domestic customer. After installation, their metrological characteristics evolve depending on the particular design of the meters and their actual working conditions in the field. This work presents a comprehensive set of tests to determine the initial and after installation weighted error of two types of domestic single-jet water meters. Three non-linear degradation models have been derived from the tests results. These models consider age, totalised volume, or both parameters simultaneously as drivers of the weighted error. The results show that even though the construction of the two examined meters is similar, they have been working under comparable operational conditions and measuring water of the same quality, there is a significant difference in the performance between both types. This result highlights the need to conduct individual analyses for each meter type and the impossibility of generalizing conclusions on how the weighted error could evolve over time.

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“…Some studies have validated CFD techniques to simulate the operation of water meters [16,25] and correspondingly, the influence of hydraulic fittings [8,26] or other structures [27] on the distortion of the measured flow. The use of CFD numerical models can effectively reduce the high cost of experimental testing with turbine flowmeters [28].…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Woltman Meter Accuracy under Flow Perturbations

Palau

Balbastre

Manzano

et al. 2019

Water

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One of the unknowns in the instrumentation for water measurement is what degree of influence other hydraulic elements exert on the velocity profile and, consequently, on the measurement errors. In this work, the measurement errors of a horizontal-axis Woltman meter produced by a gate valve and by a butterfly valve in different hydraulic configurations were studied using a simplified numerical model. The gate valve was installed beside the meter and three pipe diameters upstream of the meter and were operated with closures of 75%, 50% and 25%, while the butterfly valve was installed at three pipe diameters upstream of the meter with closures of 0 • (open) and 30 • . The numerical model based on the rotor's torque balance equations and Computational Fluid Dynamics (CFD) was validated by experimental tests. According to the results, it was concluded that the proposed model is valid and capable of estimating the errors caused by the hydraulic fittings arranged next to the meter. In addition, it is evident that for the analysed operating range, both valves must be installed at least three diameters of straight pipe upstream of the meter. Author Contributions: Conceptualization, C.V.P.; methodology, C.V.P., I.B. and J.M.; software, C.V.P., I.B. and J.M.; formal analysis, C.V.P., I.B. and J.M.; investigation, C.V.P., I.B.P. and J.M.; data curation, C.V.P., I.B.P. and J.M.; writing-original draft preparation, C.V.P.; writing-review and editing, C.V.P., B.M.A. and G.V.B.; visualization, C.V.P. and G.V.B.; supervision, C.V.P., B.M.A. ad J.M. Funding: This research received no external funding. Conflicts of Interest:The authors declare no conflict of interest.

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Computational study of the tangential type turbine flowmeter

Cited by 20 publications

References 9 publications

Effects of network pressure on water meter under-registration: an experimental analysis

Effects of network pressure on water meter under-registration: an experimental analysis

Performance Analysis of Ageing Single-Jet Water Meters for Measuring Residential Water Consumption

Numerical Analysis of Woltman Meter Accuracy under Flow Perturbations

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