Development and Validation of a Generic Engine Lubricating Oil Consumption Model for Environmental Impact Assessments

2022 ◽  
Author(s):  
Eric Schuster ◽  
Martin Feige ◽  
Maarten Uijt De Haag
2013 ◽  
Vol 136 (1) ◽  
Author(s):  
Fatih Kagnici ◽  
Ozgen Akalin

It is well known that cylinder bore deformations during engine operation cause a number of problems in piston ring lubrication. Particularly, the deterioration of piston ring and cylinder bore conformability results in a significant increase in lubricating oil consumption. Therefore, measurement and identification of cylinder bore distortion has been an important subject for engine designers. In this study, an analytical lubricating oil consumption model was developed for a diesel engine. Piston stiffness was identified as an important input parameter for the oil consumption model, and the stiffness matrix of the piston was calculated using finite element simulations. In addition, finite element analysis was performed to determine the distorted cylinder block shape in engine running conditions. Pressure curves and loads obtained in actual engine tests were used in the analysis. The Fourier coefficients of a distorted cylinder bore was calculated which characterize the deformed bore orders. Using these Fourier coefficients, several distorted bore shapes were regenerated, including a straight bore and the effect of each order on total lube oil consumption was investigated by means of the oil consumption model.


Author(s):  
Fatih Kagnici ◽  
Ozgen Akalin

It is well-known that cylinder bore deformations during engine operation cause a number of problems in piston ring lubrication. Particularly, the deterioration of piston ring and cylinder bore conformability results in a significant increase in lubricating oil consumption (LOC). Therefore, measurement and identification of cylinder bore distortion has been an important subject for engine designers. In this study, an analytical lubricating oil consumption model was developed for a diesel engine. Piston stiffness was identified as an important input parameter for the oil consumption model, and the stiffness matrix of the piston was calculated using finite element simulations. In addition, finite element analysis was performed to determine the distorted cylinder block shape in engine running conditions. Pressure curves obtained in actual engine tests were used in the analysis. The Fourier coefficients of a distorted cylinder bore was calculated which characterize the deformed bore orders. Using these Fourier coefficients, several distorted bore shapes were regenerated, including a straight bore and the effect of each order on total lube oil consumption was investigated by means of the oil consumption model.


Author(s):  
U. Nopp-Mayr ◽  
F. Kunz ◽  
F. Suppan ◽  
E. Schöll ◽  
J. Coppes

AbstractIncreasing numbers of wind power plants (WPP) are constructed across the globe to reduce the anthropogenic contribution to global warming. There are, however, concerns on the effects of WPP on human health as well as related effects on wildlife. To address potential effects of WPP in environmental impact assessments, existing models accounting for shadow flickering and noise are widely applied. However, a standardized, yet simple and widely applicable proxy for the visibility of rotating wind turbines in woodland areas was largely lacking up to date. We combined land cover information of forest canopy extracted from orthophotos and airborne laser scanning (LiDAR) data to represent the visibility of rotating wind turbines in five woodland study sites with a high spatial resolution. Performing an in-situ validation in five study areas across Europe which resulted in a unique sample of 1738 independent field observations, we show that our approach adequately predicts from where rotating wind turbine blades are visible within woodlands or not. We thus provide strong evidence, that our approach yields a valuable proxy of the visibility of moving rotor blades with high resolution which in turn can be applied in environmental impact assessments of WPP within woodlands worldwide.


Energy Policy ◽  
2021 ◽  
Vol 156 ◽  
pp. 112379
Author(s):  
Jacob D. Hileman ◽  
Mario Angst ◽  
Tyler A. Scott ◽  
Emma Sundström

2021 ◽  
pp. 417-437
Author(s):  
Isabel L. Jones ◽  
Anderson Saldanha Bueno ◽  
Maíra Benchimol ◽  
Ana Filipa Palmeirim ◽  
Danielle Storck-Tonon ◽  
...  

2015 ◽  
Vol 87 (4) ◽  
pp. 2335-2348 ◽  
Author(s):  
Bruno Milanez

ABSTRACT In this article, I argue that attempting to solve real problems is a possible approach to bring social and natural sciences together, and suggest that - as Environmental Impact Assessment necessarily brings together social and environmental issues - this debate is a strong candidate for such a task. The argument is based on a general discussion about the possibilities and limitations of Environmental Impact Assessments, the social-environmental impacts of mining activities and three case studies. The analysis of the cases indicates possibilities and limitations of the dialogue between scientists from various areas - and of the collaboration with social movements and affected communities - in avoiding negative impacts of mining projects and, eventually, increasing their sustainability.


Author(s):  
Javiera Barandiarán

Neoliberal environmental policies operate through markets, including for carbon, water, ecosystem services, or—as in contemporary Chile—for environmental scientific knowledge. Chile illustrates how markets for science operate, such as for monitoring data or environmental impact assessments, and their negative impacts on public trust in science and on the state’s regulatory efforts. In a society governed by a market for science, environmental scientists cannot escape the suspicion that conflicts of interest compromise their independence and the credibility of their work. Chile’s neoliberal 1980 Constitution sustains this market for knowledge but will be reformed following national demonstrations in 2019. The health of Chile’s environment depends on a new constitution that democratizes both democracy and science. Rights of nature doctrines, as in Ecuador’s 2008 Constitution, can provide the constitutional foundation for strong mutual accountability between science, the state, society, and nature.


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