The Experts below are selected from a list of 4431 Experts worldwide ranked by ideXlab platform
Joop Helder - One of the best experts on this subject based on the ideXlab platform.
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wind wave basin verification of a performance matched scale model wind turbine on a floating offshore wind turbine platform
ASME 2014 33rd International Conference on Ocean Offshore and Arctic Engineering, 2014Co-Authors: Richard Kimball, Andrew J Goupee, Matthew J Fowler, Erikjan De Ridder, Joop HelderAbstract:In 2011, the DeepCwind Consortium performed 1/50th-scale model tests on three offshore floating wind platforms at the Maritime Research Institute Netherlands (MARIN) using a geometrically scaled model of the National Renewable Energy Laboratory (NREL) 5 MW reference turbine. However, due to the severe mismatch in Reynolds number between full scale and model scale, the strictly Froude-scaled, geometrically-similar (geo-sim) wind turbine underperformed greatly, which required significant modification of test wind speeds to match key wind turbine aerodynamic loads, such as thrust. The conclusion from these prior efforts was to abandon a geometrically similar model turbine and use a performance-matched turbine model in its place, keeping mass and inertia properties properly scaled, but utilizing modified blade geometries to achieve required performance at the lower Reynolds numbers of the Froude scaled model. To this end, the University of Maine and MARIN worked in parallel to develop performance-matched turbines designed to emulate the full scale performance of the NREL 5 MW reference turbine at model scale conditions. An overview of this performance-matched wind turbine design methodology is presented and examples of performance-matched turbines are provided.The DeepCwind semi-submersible platform was retested at MARIN in 2013 using the MARIN Stock Wind Turbine (MSWT), which was designed to closely emulate the performance of the original NREL 5 MW turbine. This work compares the wind turbine performance of the MSWT to the previously used geometrically scaled NREL 5 MW turbine. Additionally, turbine performance testing of the 1/50th-scale MSWT was completed at MARIN and a 1/130th-scale model was tested at the University of Maine under Reynolds numbers corresponding to the Froude-scaled model test conditions. Results from these tests are provided to demonstrate effects on model test fidelity. Comparisons of the performance response of the geometrically matched turbine to the performance-matched turbines are also presented to illustrate the performance-matched turbine methodology. Lastly, examples of the fully dynamic floating system performance using the original geometrically scaled NREL 5 MW turbine and the MSWT are investigated to illustrate the implementation of the model test procedure as well as the effects of turbine performance on floater response. Using the procedures employed for the MARIN tests as a guide, the results of this work support the development of protocols for properly designing scale model wind turbines that emulate the full scale design for Froude-scale wind/wave basin tests of floating offshore wind turbines.© 2014 ASME
Wang M. - One of the best experts on this subject based on the ideXlab platform.
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A new method for scale-up of solvent-based post-combustion carbon capture process with packed columns
'Elsevier BV', 2020Co-Authors: Otitoju O., Oko E., Wang M.Abstract:Solvent-based post-combustion carbon capture (PCC) with packed column is the most commercially ready CO2 capture technology. To study commercial-scale PCC processes, validated pilot scale models are often scaled up to commercial-scale using the generalized pressure drop correlation (GPDC) chart which requires assuming the column pressure drop. The GPDC method may lead to either over-estimation or under-estimation of the column diameter. In this paper, a new method for estimating the packed column diameter without assuming the pressure drop has been proposed and used for model scale-up. The method was validated by scaling between two existing pilot plant sizes. The CO2 capture process was simulated in Aspen Plus® and validated at pilot scale. The validated model was scaled up to commercial CO2 capture plant capable of serving a 250 MWe combined cycle gas turbine power plant using the new method proposed in this study. The results obtained from the scale-up study were compared to those obtained when the GPDC method was used to design the same commercial CO2 capture plant. The results showed that the GPDC method overestimated the absorber and stripper diameter by 1.6 % and 8.5 % respectively. Process simulation results for the commercial-scale plant showed about 2.12 % and 5.63 % lower solvent flow rate and reboiler duty with the proposed method. Therefore, the capital and operating costs for the process using the newly proposed scale-up method could be lower based on our estimates of the column dimensions, solvent flow rate and specific reboiler duty
Wang Meihong. - One of the best experts on this subject based on the ideXlab platform.
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A new method for scale-up of solvent-based post-combustion carbon capture process with packed columns
Elsevier, 2019Co-Authors: Otitoju Olajide., Oko Eni., Wang Meihong.Abstract:© 2019 Elsevier Ltd Solvent-based post-combustion carbon capture (PCC) with packed column is the most commercially ready CO2 capture technology. To study commercial-scale PCC processes, validated pilot scale models are often scaled up to commercial-scale using the generalized pressure drop correlation (GPDC) chart which requires assuming the column pressure drop. The GPDC method may lead to either over-estimation or under-estimation of the column diameter. In this paper, a new method for estimating the packed column diameter without assuming the pressure drop has been proposed and used for model scale-up. The method was validated by scaling between two existing pilot plant sizes. The CO2 capture process was simulated in Aspen Plus® and validated at pilot scale. The validated model was scaled up to commercial CO2 capture plant capable of serving a 250 MWe combined cycle gas turbine power plant using the new method proposed in this study. The results obtained from the scale-up study were compared to those obtained when the GPDC method was used to design the same commercial CO2 capture plant. The results showed that the GPDC method overestimated the absorber and stripper diameter by 1.6 % and 8.5 % respectively. Process simulation results for the commercial-scale plant showed about 2.12 % and 5.63 % lower solvent flow rate and reboiler duty with the proposed method. Therefore, the capital and operating costs for the process using the newly proposed scale-up method could be lower based on our estimates of the column dimensions, solvent flow rate and specific reboiler duty
Leila Cuttle - One of the best experts on this subject based on the ideXlab platform.
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evidence based injury prediction data for the water temperature and duration of exposure for clinically relevant deep dermal Scald injuries
Wound Repair and Regeneration, 2017Co-Authors: Christine J Andrews, Roy M Kimble, Margit Kempf, Leila CuttleAbstract:Deep dermal burn injuries require extensive medical care; however, the water temperatures and durations of exposure that result in a severe Scald injury are unknown. This study used a porcine burn model to investigate the time and temperature threshold for clinically relevant deep dermal injuries for both immersion (long duration) and spill/splash (short duration) Scald events. Scald wounds were created on the flanks of anaesthetized juvenile large White pigs (27 kg). Acute tissue injury evaluations performed at 1 hour and days 1, 3, and 7 postburn (16 pigs) included: wound examination, biopsies, and laser Doppler imaging. Up to 20 burn combinations were tested including: 50-60 °C water for 1-10 minutes (immersion); and 60-90 °C water for 5 seconds (spill/splash). Burn conditions demonstrating mid-to-deep dermal damage histologically were followed for 21 days to assess time to reepithelialize (eight pigs). Histologically, depth of damage increased until day 3 postburn. Damage to ≥75% of the depth of dermis was associated with burns taking longer than 3 weeks to fully reepithelialize. For spill/splash (5 seconds) Scalds, water at ≥75 °C showed damage to mid-dermis or deeper by day 3; however, only burns from water ≥85 °C were not reepithelialized by day 21. For immersion Scalds of equivalent duration, water at 55 °C caused significantly deeper dermal damage than 50 °C (p 10 minutes, 55 °C for 5 minutes, 60 °C for 60 seconds, and 70 °C for > 15 seconds. This research provides valuable evidence-based injury prediction data, which can be used to inform future burn injury prevention guidelines/legislation to reduce the risk of severe Scald injuries and support medicolegal opinions for cases where an inflicted mechanism of injury is alleged.
Shane J Lopez - One of the best experts on this subject based on the ideXlab platform.
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age effects on wechsler adult intelligence scale iii subtests
Archives of Clinical Neuropsychology, 2000Co-Authors: Joseph J Ryan, Jerome M Sattler, Shane J LopezAbstract:This investigation extended work on the Wechsler Adult Intelligence Scaled-Revised (WAIS-R) to the WAIS-III by determining how allotments of scaled-score points change with age, and to evaluate WAIS-III performance in terms of the Horn-Cattell constructs of crystallized and fluid intelligence. The age norms for the 14 individual WAIS-III subtests indicate that additional scaled-score points are awarded primarily to the Letter-Number Sequencing subtest of the Verbal Scale and to the seven Performance Scale subtests at ages 45 to 89 years for the same performance as individuals in the 20- to 34-year-old reference group. Subtests that measure speed of information processing showed more of a decline than subtests that measure verbal processing. Results are consistent with the view that measures of fluid intelligence show more of a decline with advancing age than do measures of crystallized intelligence. Published by Elsevier Science Ltd
