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5 results for “condition account”
Supplementary input data for accounting for component condition and preventive retirement in power system reliability of supply analyses
<div> <div>This data set contains supplementary data used for case studies on accounting for transformer condition in reliability of supply analyses in the following manuscripts: <br>1) H. Toftaker, J. Foros, I. B. Sperstad, "Accounting for component condition and preventive retirement in power system reliability of supply analyses", IET Generation, Transmission & Distribution, vol. 5, no. 1, 2023, DOI: 10.1049/gtd2.12761. <br>2) I. Bjerkebæk, I. B. Sperstad, H. Toftaker, G. Kjølle, "Simulating the Long Term Effect of Asset Management Strategies on Reliability of Supply", pre-print submitted for peer review, 2024. DOI: 10.36227/techrxiv.172107759.95745501/v1.</div> <div> See README.md for details.</div> </div>
Hybrid-electric passenger car energy utilization and emissions: Relationships for real-world driving conditions that account for road grade
<p>Past research showed on-road emissions patterns unique to hybrid electric vehicles (HEVs), indicating the need to account for them in emissions models as projected HEV sales increase over the coming decades. This work defines and characterizes a variable that quantifies HEV operating behavior to inform future development of new HEV emissions models based on current knowledge of conventional vehicle (CV) emissions patterns. Instantaneous hybridization factor (IHF), was quantified using on-road data collected from a 2010 Toyota Camry HEV. IHF is the ratio of electric system power to total system power and accounts for energy storage in the high voltage battery (IHF ranges from −1 to +1). Relationships between IHF and vehicle specific power (VSP), road type and road grade were examined. Negative VSP resulted in regenerative braking operation (IHF = −0.01 to −1) 90% of the time. IHF identified the VSP range where HEV operation was highly variable (VSP = −1 to 8 kW/ton) when driving at speeds below the ICE-off threshold (42 mph). VSP and IHF together account for 76–86% of the variability in HEV CO<sub>2</sub> emissions in this study. CO<sub>2</sub> model results using VSP computed with the measured real-world road grade (R<sup>2</sup> = 0.86) gave improved fits over the no-grade VSP model (R<sup>2</sup> = 0.69). This study establishes one framework for calculating the instantaneous HEV power split, confirms the need to include road grade in VSP for accurate modeling of vehicle emissions, and identified the need for significant improvements in on-board diagnostic (OBD) scantool measurement requirements for HEVs in three areas: (1) temporal resolution (sub-second to capture transient events such as ICE restarts); (2) simultaneous data logging capability for multiple controller area networks (i.e., engine and HEV parameters together); and (3) improved data precision.</p>
Accounting for forest condition in Europe based on an international statistical standard
<p>The datasets describe a European forest ecosystem condition account compliant with the System of Environmental-Economic Accounting. Four datasets are provided:</p> <p>1. An excel file with a forest extent and condition account at European level for 44 forest types</p> <p>2. A raster map with the forest typology</p> <p>3. A raster map with the forest condition index (0-1) at 100 m resolution for the years 2000 and 2018</p> <p>4. A map quantifying the uncertainty of the condition estimates using a semi-quantitative scale (low uncertainty, low to medium uncertainty, medium to high uncertainty, high uncertainty)</p>
Hybrid-electric passenger car energy utilization and emissions: Relationships for real-world driving conditions that account for road grade
Open the record for dataset details and reuse information.
Supplementary material 1 from: Maes J, Driver A, Czúcz B, Keith H, Jackson B, Nicholson E, Dasoo M (2020) A review of ecosystem condition accounts: lessons learned and options for further development. One Ecosystem 5: e53485. https://doi.org/10.3897/oneeco.5.e53485
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