Impact of Pipeline Construction on Air Environment

Tomareva, I. A.; Kozlovtseva, E Yu; Perfilov, V. A.

doi:10.1088/1757-899x/262/1/012168

Cited by 3 publications

(3 citation statements)

References 7 publications

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“…Excavation works, backfilling operations, stockpiling of waste filling trenches with sand, vehicular movement over the cleared work area, and transportation of materials all contribute to air emissions and dust particles that affect air quality. Tomareva et al [7] referred to pipelines as being complex technogenic systems and mentioned also that due to the linear arrangement of pipelines, many natural and climatic zones with various geological and hydrological conditions are affected by the anthropogenic impact.…”

Section: Introductionmentioning

confidence: 99%

Analysis of PM2.5, PM10, and Total Suspended Particle Exposure in the Tema Metropolitan Area of Ghana

et al. 2021

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Dust levels around the Tema industrial area of the Greater Accra Region have seen no reduction in recent years. Even though at some periods in time a natural drop in dust pollution levels is assured, the overall variation characteristics of the concentration of PM2.5, PM10, and Total Suspended Particles (TSP) have not been studied in recent years. This paper examines the levels of dust pollution across four (4) locations within the Tema metropolitan area with a specific interest in selecting locations and periods (weeks) significantly affected by dust pollution within the study area. Data collection was done over a nine-month period using the Casella 712 Microdust Pro Kit equipment. Measurements were done day and night at sampling points about 100 m apart in a given location. Monitoring was conducted once a week during the day and at night with a sampling period of 24 h per location, for thirty-six weeks. The generalized linear models were explored in selecting locations and weeks significantly affected by dust pollution. The study results showed no significant difference between pollution levels across the four selected locations. Eight, eleven, and five weeks out of the 36 weeks recorded significantly high concentrations of PM2.5, PM10, and TSP respectively. In addition, two out of the selected four areas (the oil jetty area and the VALCO hospital area) were found to have significantly high concentrations of dust pollution. The study recommends that an urgent air quality control policy intervention be put in place to control the highly alarming levels of dust pollution concentrations to guarantee and protect human health within the study area and beyond.

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Section: Introductionmentioning

confidence: 99%

Analysis of PM2.5, PM10, and Total Suspended Particle Exposure in the Tema Metropolitan Area of Ghana

et al. 2021

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“…Pipeline transportation is more economical and environmentally friendly than other modes of transport, such as rail or trucking, when moving minerals over long distances. They also have a high safe delivery rate [2,3]. In the literature, we can find various approaches for the analysis of solid-liquid flow and its predictions [4][5][6][7][8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Numerical Modelling of Heat Transfer in Fine Dispersive Slurry Flow

Bartosik

2021

Energies

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Slurry flows commonly appear in the transport of minerals from a mine to the processing site or from the deep ocean to the surface level. The process of heat transfer in solid–liquid flow is especially important for the long pipeline distance. The paper is focused on the numerical modelling and simulation of heat transfer in a fine dispersive slurry, which exhibits yield stress and damping of turbulence. The Bingham rheological model and the apparent viscosity concept were applied. The physical model was formulated and then the mathematical model, which constitutes conservative equations based on the time average approach for mass, momentum, and internal energy. The slurry flow in a pipeline is turbulent and fully developed hydrodynamically and thermally. The closure problem was solved by taking into account the Boussinesque hypothesis and a suitable turbulence model, which includes the influence of the yield shear stress on the wall damping function. The objective of the paper is to develop a new correlation of the Nusselt number for turbulent flow of fine dispersive slurry that exhibits yield stress and damping of turbulence. Simulations were performed for turbulent slurry flow, for solid volume concentrations 10%, 20%, 30%, and for water. The mathematical model for heat transfer of the carrier liquid flow has been validated. The study confirmed that the slurry velocity profiles are substantially different from those of the carrier liquid and have a significant effect on the heat transfer process. The highest rate of decrease in the Nusselt number is for low solid concentrations, while for C > 10% the decrease in the Nusselt number is gradual. A new correlation for the Nusselt number is proposed, which includes the Reynolds and Prandtl numbers, the dimensionless yield shear stress, and solid concentration. The new Nusselt number is in good agreement with the numerical predictions and the highest relative error was obtained for C = 10% and Nu = 44.3 and is equal to −12%. Results of the simulations are discussed. Conclusions and recommendations for further research are formulated.

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“…In the past years, a large number of location methods for structure impact have been proposed [18,[51][52][53][54][55][56][57][58][59][60]. Coverley et al [61] studied impact damage location using optimized sensor triangulation procedure in composite structures, and the method of impact location is based on a classical sensor triangulation methodology and combines experimental strain wave velocity analysis.…”

Section: Introductionmentioning

confidence: 99%

Pipeline two-dimensional impact location determination using time of arrival with instant phase (TOAIP) with piezoceramic transducer array

Bao

Hei

Luo

et al. 2018

Smart Mater. Struct.

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An impact event on a pipeline generates stress waves that travel along the pipeline, and the traveling stress waves can be easily detected by distributed piezoceramic transducers. To pinpoint impact location on a pipeline, the time of arrival (TOA) is commonly used and the envelope calculated by the Hilbert transform is an effective method to determine the TOA. However, the envelope used to extract the TOA depends on the manual selection of the trigger threshold. In fact, the instant phase, that changes regularly from -pi to pi as the stress wave travels, is an important characteristic parameter of the signal, and the TOA can be determined by the periodicity of the instant phase. However, this fact has been overlooked in calculating TOA in the literature. In this paper, a new method, time of arrival with instant phase (TOAIP), is developed to calculate the TOA without the need of manual selection of the threshold. Taking into account the non-stationarity of the signal and noise interference, short time window Fourier transform and band-pass filter are utilized to extract the useful signal, the TOA is then determined by using the instant phase which is based both the first zero-crossing point of signal and the periodicity of the phase. In general, most of the pipeline impact localization realize one-dimensional positioning along its length direction. Another novelty of this paper is the development of the two-dimensional impact location (TDIL) that can estimate the impact location information along both length and circumferential directions. Experimental studies based on pipeline with distributed lead zirconate titanate (PZT) transducers mounted on the surface of the pipeline are carried out in this research. Both of physical measurements and inversion results have verified the accuracy and reliability of TOAIP and TDIL on the pipeline.

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Impact of Pipeline Construction on Air Environment

Cited by 3 publications

References 7 publications

Analysis of PM2.5, PM10, and Total Suspended Particle Exposure in the Tema Metropolitan Area of Ghana

Analysis of PM2.5, PM10, and Total Suspended Particle Exposure in the Tema Metropolitan Area of Ghana

Numerical Modelling of Heat Transfer in Fine Dispersive Slurry Flow

Pipeline two-dimensional impact location determination using time of arrival with instant phase (TOAIP) with piezoceramic transducer array

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