Filtering by Subject: Other Engineering

Precise estimation of the GPS To Galileo Time Offset: an experimental setup and its associated processing method

Pierre Sakic, Edmond Saint-Denis, Solène Thevenet, et al.

Published: 2024-02-15
Subjects: Aerospace Engineering, Earth Sciences, Geophysics and Seismology, Navigation, Guidance, Control and Dynamics, Other Earth Sciences, Other Engineering

Although the satellite navigation systems are all in their definition based on the international atomic time (TAI), each system has its own realization. There is therefore a difference, variable in time, between different realizations of the same time systems. Thus, the time of the GPS (GPST) and Galileo (Galileo System Time, GST) systems differ in their realization by some nanoseconds. This [...]

Onsite sanitation systems and contamination of groundwater: A systematic review of the evidence for risk using the source-pathway-receptor model.

Maureen Mbae, Paul Hansen, Celia Way, et al.

Published: 2023-07-28
Subjects: Other Engineering

The level of risk that onsite sanitation systems (OSS) pose to groundwater quality remains uncertain. The link between contamination and OSS can only be proved if the source, pathway, and receptor (SPR) are investigated and confirmed when assessing contamination. The literature on the connection between OSS and groundwater contamination has been reviewed several times. However, previous reviews [...]

Assisted upscaling of miscible CO¬2-enhanced oil recovery floods using an artificial-neural-network-based optimisation algorithm

Precious Ogbeiwi, Karl D Stephen

Published: 2023-07-13
Subjects: Engineering, Other Engineering

The fine-scale compositional simulations required to accurately model miscible CO2 flooding are unrealistic and highly computationally expensive, and upscaling procedures are required to approximate the behaviour of these fine-scale grids on more realistic coarse-scale models. These procedures include the pseudoisation of relative permeabilities which ensures the matching of large-scale effects [...]

Techno-economic evaluation of the potential of CO2 storage and Enhanced Oil Recovery in the Niger-Delta Hydrocarbon Basin using reservoir simulation: Case Study

Precious Ogbeiwi, Karl D Stephen

Published: 2023-07-12
Subjects: Engineering, Other Engineering

The constant dependence on fossil fuel combustion for energy and industrial activities results in global warming and climate change due to the increased atmospheric concentration of greenhouse gases such as CO2. CO2 storage in mature petroleum reservoirs is considered one of the most viable ways to reduce CO2 concentrations in the atmosphere. The Niger-Delta hydrocarbon basin holds significant [...]

Optimising the value of a CO2 Water-Alternating-Gas injection project under geological and economic uncertainties using an improved artificial neural network.

Precious Ogbeiwi, Karl D Stephen

Published: 2023-07-08
Subjects: Engineering, Other Engineering

The numerical simulations required for the robust optimisation of the alternating injection of water and CO2 in hydrocarbon reservoirs are computationally expensive due to engineering, geological, and economic uncertainties. Using approximation models of the desired objective function(s) can significantly decrease the cost associated with the optimisation routines while providing an adequate [...]

Carbon Negative Geothermal: Techno-Economic Analysis of Geothermal Energy combined with Direct and Biomass-Based Carbon Dioxide Removal

Karan Titus, David Dempsey, Rebecca Peer, et al.

Published: 2023-06-22
Subjects: Other Engineering

Limiting global temperature rise to between 1.5 and 2°C will likely require widespread deployment of carbon dioxide removal (CDR) technologies for sectors with hard-to-abate emissions. As financial resources for decarbonization are finite, strategic deployment of CDR technologies is essential for maximizing atmospheric CO2 reductions. Carbon capture and sequestration (CCS), using either direct [...]

Global Inventory of Dissolved CO2 Sequestration Potential in Geothermal Systems

David Dempsey, Karan Titus, Rebecca Peer

Published: 2023-06-20
Subjects: Engineering, Other Engineering

Geothermal electricity generation has low carbon emissions compared to hydrocarbon alternatives. Nevertheless, recent attention on emissions of magmatic CO2 and other non-condensable gases (NCG) has prompted interest in their capture and reinjection. The geothermal industry is uniquely placed to effect CO2 sequestration due to existing reinjection infrastructure (e.g., wells, pipes, pumps) and [...]

Electric Vehicles as Electric Energy Storage for a Zero Emission Grid

Paul H. Kydd

Published: 2023-04-19
Subjects: Other Engineering

Electric Vehicles, especially electric vehicles with bidirectional Vehicle-toGrid (V2G) connectivity can serve as electric energy storage assets. Following the dramtatic increase in electric vehicle registrations in 2022 there can be little doubt that electric vehicles will become a major portion of the entire light duty transportation fleet. This paper endeavors to project the growing electric [...]

Client-side Web-based Model Coupling using Basic Model Interface for Hydrology and Water Resources

Gregory James Ewing, Carlos Erazo Ramirez, Ashani Vaidya, et al.

Published: 2022-10-06
Subjects: Civil and Environmental Engineering, Computational Engineering, Other Engineering

A recent trend in hydroinformatics has been the growing number of data, models, and cyber tools which are web accessible, each aiming to improve common research tasks in hydrology through web technologies. Coupling web-based models and tools holds great promise for an integrated environment that can facilitate community participation, collaboration, and scientific replication. There are many [...]

Complex multi-source emissions quantification results for the PoMELO vehicle measurement system, test results from the CSU METEC facility

Thomas Barchyn, Chris Hugenholtz

Published: 2022-03-17
Subjects: Atmospheric Sciences, Operations Research, Systems Engineering and Industrial Engineering, Other Engineering, Petroleum Engineering, Systems Engineering

Methane emissions from oil and gas sites are often characterized by mixed plumes from multiple sources in close proximity. This presents a challenge for screening methods that rely on emissions quantification to direct and prioritize follow-up inspections. Here, we present results from experiments evaluating mixed-source quantifications using the University of Calgary Portable Methane Leak [...]

De-risking the energy transition by quantifying the uncertainties in fault stability

David Healy, Stephen Paul Hicks

Published: 2021-07-26
Subjects: Earth Sciences, Environmental Sciences, Other Engineering, Risk Analysis

The operations needed to decarbonise our energy systems increasingly involve faulted rocks in the subsurface. To manage the technical challenges presented by these rocks and the justifiable public concern over induced seismicity, we need to assess the risks. Widely used measures for fault stability, including slip and dilation tendency and fracture susceptibility, can be combined with Response [...]

Optimizing Crop Cut Collection for Determining Field-Scale Yields in an Insurance Context

Ritvik Sahajpal, Inbal Becker-Reshef, Sylvain Coutu

Published: 2020-11-10
Subjects: Geographic Information Sciences, Geography, Other Engineering, Remote Sensing, Spatial Science

Accurately determining crop yields at field-scale can help farmers estimate their net profit, enable insurance companies to ascertain payouts, and when aggregated at regional and national scales, crop yield estimates are critical in ensuring food security. Over the last few decades, crop cuts have been widely used to estimate field-scale crop yields. Crop cuts, while cost prohibitive, are the [...]

A general expression for wave-induced sediment bypassing of an isolated headland

Robert Jak McCarroll, Gerd Masselink, Nieves G. Valiente, et al.

Published: 2020-07-21
Subjects: Earth Sciences, Engineering, Geomorphology, Oceanography, Oceanography and Atmospheric Sciences and Meteorology, Other Engineering, Physical Sciences and Mathematics

Accurate knowledge of the sediment budget of a coastal cell is necessary for coastal management and predicting long-term coastal change. An important component in the sediment budget of many wave-dominated embayed coastlines is the amount of sediment that bypasses rocky headlands, which present partial barriers to alongshore transport. Despite a recent surge in research interest in headland [...]

Formation Susceptibility to Wellbore Instability and Sand Production in the Hajdúszoboszló field, Pannonian Basin: Hungary

Oladoyin Kolawole

Published: 2020-07-06
Subjects: Engineering, Mining Engineering, Other Engineering

Wellbore instability and formation sand production pose potential risks for wellbore drilling, completion and production operations. In many sandstone reservoirs worldwide, sand production has been observed to accompany oil and gas production. In this study, we estimate, predict and quantify wellbore instability and sand production potentials in the Hajdúszoboszló field, Pannonian Basin, Hungary, [...]

A novel rules-based shoreface translation model for predicting future coastal change: ShoreTrans

Robert Jak McCarroll, Gerd Masselink, Nieves G. Valiente, et al.

Published: 2020-06-05
Subjects: Earth Sciences, Engineering, Geomorphology, Oceanography, Oceanography and Atmospheric Sciences and Meteorology, Other Engineering, Physical Sciences and Mathematics

Predicting change to global shorelines presents an increasing challenge as sea-level rise (SLR) accelerates. Many shoreline prediction models use variations of the ‘Bruun-rule’, failing to account for relevant processes and morphologic complexity. To address this, we introduce a simple rules-based model (ShoreTrans) designed for complex, real-world profiles that predicts change across a wide [...]


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