Browsing by Subject "ALPS"
Now showing 1 - 4 of 4
- Results Per Page
- Sort Options
Item Challenges and Solutions for the Use of Flywheel Energy Storage in High Power Applications(2005-10) Herbst, J.D.; Caprio, M.T; Gattozzi, A.L; Graf, C.Item Generative naming in Korean-English bilingual speakers and assessment tests for Korean-English bilingual speakers with aphasia(2014-05) Kwon, Hygine; Marquardt, Thomas P.This present study aimed to: 1) Update and expand the data pool of normal Korean-English speaker’s generative naming task from previous data in Food, Clothes, and Animal categories, 2) analyze the relationship between language proficiencies and total number of words and different categories, and 3) provide easier means of testing Korean-English bilinguals with aphasia through translated standardized tests such as Aphasia Language Performance Scale (ALPS) and Boston Naming Test (BNT). Five additional subjects were added to 25 participants from Kim (2010). The participants were asked to name as many different items as possible in 60 seconds in Food, Clothes, and Animal category in both English and Korean. The participants generated more items in Korean than in English. A significant negative correlation was observed between number of words generated in Korean and Korean proficiency and between number of category doublets produced and language proficiency difference scores. A significant positive correlation was observed between number of words generated in English and English proficiency. Large differences in the number of words generated were observed between the participants assessed and participants from Kim (2010), indicating education level and field of study impacts generative naming ability.Item Status of the Advanced Locomotive Propulsion System (ALPS) Project(2000-05) Herbst, J.D.; Thelen, R.F; Walls, W.A.The University of Texas at Austin Center for Electromechanics (UT-CEM) is currently developing an Advanced Locomotive Propulsion System (ALPS) as part of the Next Generation High Speed Rail program sponsored by the Federal Railroad Administration (FRA). Testing of the advanced propulsion system will be conducted as a portion of the FRA Non-Electric High Speed Locomotive Demonstration program. The project goal is to develop a non-electric locomotive propulsion system capable of 150 mph operation on existing infrastructure with good fuel economy and low noise and pollutant emissions. The propulsion system consists of two major elements: (1) a high speed generator directly coupled to a 5,000 hp gas turbine (turboalternator) to provide prime power and (2) an energy storage flywheel to provide additional power for acceleration and speed maintenance on grades, and to recover kinetic energy during braking. In addition to improving the overall system efficiency, the energy storage flywheel also provides load leveling for the turbine, reducing thermal cycling and significantly extending turbine maintenance intervals. The paper provides an overview of the ALPS system and presents the results of performance simulations to illustrate the benefits of the system. The paper also provides the current status of the project, along with component test results as available.Item Testing of a 3 MW high speed generator and turbine drive for a hybrid vehicle propulsion system(American Society of Mechanical Engineers, 2008-07) Thelen, R.F.; Herbst, J.D.; Wardell, D.; Murphy, B.T.; Canilang, B.D.The need for increased design flexibility and reduced weight and volume for electric power generation infrastructure has driven an increased interest in the use of high speed generators directly driven by gas turbine prime movers for both military and commercial power generation applications. This transition has been facilitated by the use of dc distribution and recent advances in the performance of solid state power conversion equipment, enabling designers to decouple the power generation frequency from typical 60 Hz ac loads. Operation of the generator at the turbine output speed eliminates the need for a speed reduction gearbox and can significantly increase the volumetric and gravimetric power density of the power generation system. This is particularly true for turbines in the 3 to 10 MW power range which typically operate with power turbine speeds of 7,000 to 16,000 rpm. The University of Texas at Austin, Center for Electromechanics (UT-CEM) is currently developing a 3 MW high speed generator and turbine drive system for a hybrid vehicle propulsion system as a part of the Federal Railroad Administration’s Advanced Locomotive Propulsion System (ALPS) Program. The ALPS system consists of a 3 MW turbine/alternator prime mover coupled with a 480 MJ, 2 MW flywheel energy storage system. Although designed as the prime mover for a high speed passenger locomotive, the compact turbine/alternator package is well suited for use in marine applications as an auxiliary turbine generator set or as the primary propulsion system for smaller vessels. The ALPS 3 MW high speed generator and turbine drive system were originally presented at the ASME Turbo Expo 2005 [1]. This follow-on paper presents the results of mechanical spin testing and No-Load electrical testing of the high speed generator and the Static Load testing of the generator and turbine drive system at NAVSEA (Philadelphia, PA) with a fixed resistive load. The generator has been tested to a 1.5 MW power level in the Static Load procedures and is being prepared for the final test phase to include dynamic power exchange with the flywheel.