The Importance of Measurement Uncertainty Arising from the Sampling Process in Conformity Assessment: The Case of Fuel Quality

Metrology, Journal Year: 2025, Volume and Issue: 5(1), P. 7 - 7

Published: Jan. 22, 2025

There is growing concern regarding the environmental and operational safety aspects of fuel. The result a physicochemical measurement outcome series steps that begin with sampling process. information obtained from this step contribution analytical process define uncertainty, although most laboratories consider only as quality parameter. On other hand, variability can be used vital to evaluate conformity specification. This study aimed use uncertainty considering and, next, uncertainties in compliance assessment, taking measurements fuel case studies. first scenario, which traditional focused solely on showed less rigorous than second combined uncertainty. results indicated for flash point jet fuel, sulfur mass fraction gasoline-ethanol blends, kinematic viscosity diesel, risks consumers—first then combining uncertainty—were following: 2.6% 5.6%; 4.4% 7.1%; 1.6% 18.9%, respectively. Since initial each pair was below 5%, specification suggested. However, when accounting there an indication potential non-compliance Therefore, it concluded arising must considered assessment.

Language: Английский

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Harnessing non-edible Quercus incana seeds for sustainable and clean biodiesel production using seed-derived green Al2O3 nanocatalyst

Sustainable Energy Technologies and Assessments, Journal Year: 2024, Volume and Issue: 72, P. 104025 - 104025

Published: Oct. 21, 2024

Language: Английский

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Study on the Effect of Oxygenated Additives in Nicker Bean Biodiesel Blends for Reduced Emissions

Chemistry Africa, Journal Year: 2025, Volume and Issue: unknown

Published: April 28, 2025

Language: Английский

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Evaluation of the Influence of Water Content in Oil on the Metrological Performance of Oil Flow Measurement Systems

Energies, Journal Year: 2024, Volume and Issue: 17(10), P. 2355 - 2355

Published: May 13, 2024

According to current Brazilian regulations, if the volumes of oil produced used as a reference for payment government shares and third parties contain water content greater than 2% v/v, these must be arbitrarily increased between 1.44% 10.89% due exclusively content, which has caused operational problems companies such differences sold, additional payments from parties. This study aimed evaluate metrological performance measurement systems with ultrasonic, Coriolis positive displacement flow meters when subjected varied fluid temperature rate conditions using Design Experiments Response Surface Methodology. The analysis variance showed that models presented good fits ultrasonic meter (coefficient determination R2 97.96%, p-value 0.001, standard deviation 5.89 × 10−5); (R2 90.91%, 0.037, 5.88 99.07%, 0.000, 4.85 10−5). results experiments carried out indicate contribution each parameter analyzed system varies depending on technology by meter. However, proved relevant common all technologies evaluated. All measuring evaluated were influenced in range 0% 10% error being less 0.2% compared type almost experimental conditions. Coriolis-type was one smallest among

Language: Английский

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Analysing the thermal and electrical properties of Cocos nucifera shell-based nanofluids as coolant feasibility proton exchange membrane fuel cell

Proceedings of the Institution of Mechanical Engineers Part E Journal of Process Mechanical Engineering, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 9, 2024

For an enhancement of the thermal and electrical conductivity proton exchange membrane fuel cell (PEMFC), extensive research is actively conducted on various waste bio sources. PEMFC offers cleanest form energy, electrochemical energy conversion device that possesses zero emissions with by-products such as heat water. In PEMFC, conventional coolants water water:ethylene glycol mixture does not attain substantial results in terms dissipation, which impacts performance gradually reduces operating life cell. Usually, bio-sources are environmentally friendly have merits over chemically prepared methods. Bio-based nanofluids remarkable transfer, lower conductivity, low corrosiveness system compared to other metal-based fluids base fluids, also gained a great deal scrutiny past few decades. this research, bio-sourced Cocos nucifera shell (CNS) utilised at concentrations, 0.1 vol.-%, 0.3 vol.-% 0.5 dispersed fluid (W), ethylene (EG) (80:20) analysed prior actual full stack PEMFC. Consequently, transfer has been improved by 13% for CNS 80:20 (W:EG) 0.5% volume concentration W:EG (80:20). On basis findings thermal, hydraulic properties determined. Despite drawbacks experimental design, it was concluded up nanofluid could be used cooling medium PEMFCs no adverse effects performance. It observed efficiency cells reducing ohmic losses.

Language: Английский

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