298 research outputs found
Letter from Mr. Tilden to Alden Partridge, approximately 1821-1823
No full textUndated invitation to dinner from Mr. Tilden (Joseph Tilden?) to Alden Partridge; addressed to Partridge at Earls Coffee House, Hanover Street; the author writes from Franklin Place; possibly written between 1821 and 1823.Transcription by Raymond Bouchard. Transcriptions may be subject to error
Letter from Thomas Bennett to Alden Partridge, 17 June 1826
No full textThomas Bennett writes from Charleston, South Carolina, to Alden Partridge at the American Literary, Scientific, and Military Academy in Middletown, Connecticut, regarding the speech impediment of his son Washington Jefferson Bennett; he wishes Washington to be allowed a furlough to travel to New York City to see Mrs. Leigh (Jane Leigh, author of "Facts in relation to Mrs. Leigh’s system of curing stammering, and other impediments of speech," 1826).Transcription by Sarah Cruz. Transcriptions may be subject to error
Regarding the use of the Meeting House in Norwich, VT, 12 January 1835
No full textSubscription list regarding the use of the Meeting House in Norwich, Vermont, dated 12 January 1835. Subscribers include Alden Partridge, John Wright, and Joseph Emerson.Transcription by Raymond Bouchard. Transcriptions may be subject to error
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Session B3: Evaluation of Potential Retrofit of the Alden Fish-Friendly Turbine
No full textPresenting Author Bio: Dr. Jacobson is a Senior Technical Leader in EPRI’s Waterpower Program, which encompasses conventional hydropower as well as marine and hydrokinetic technologies. His professional work over the past 25 years has focused on environmental assessment in aquatic ecosystems. Prior to joining EPRI in September, 2009, he worked in the environmental consulting arena, most recently for 13 years as the founder and principal scientist of Langhei Ecology, LLC. Dr. Jacobson’s specialty is design, analysis, and interpretation of monitoring and assessment programs to support environmental decision-making. Since 1998, Dr. Jacobson has been a faculty member of the Johns Hopkins University, Krieger School of Arts and Sciences, where he teaches a graduate course on ecological assessment. He holds Ph.D. and M.S. degrees in oceanography and limnology from the University of Wisconsin-Madison, and a B.A. degree in biology from Cornell University.Abstract: The Alden turbine was developed through industry-U.S. Department of Energy collaborative funding to provide safe turbine passage for fish at hydropower projects. The turbine was designed to minimize the probability and consequence of blade strike and keep pressure changes and shear forces within limits tolerable by fish. Suitability for retrofit was not a design criterion, and application of the Alden fish friendly turbine has historically focused on new powerhouse development in order to provide flexibility in arranging the larger Alden unit. After evaluating typical Francis and Kaplan turbine geometries and completing a basic Alden turbine retrofit study, it was found that matching the pin circle diameter of the Alden turbine distributor to that of the existing turbine will lead to minimal physical reconstruction but a relatively low power output. Increasing the size of the Alden turbine will provide an improvement to the power output but also increase the needed physical reconstruction between the existing and proposed systems. An evaluation of energy generation was completed for a hypothetical, site-specific retrofit. Energy generation given the existing Alden unit design without a fish bypass flow was 1.6% less than the base case including a fish bypass flow. A re-designed Alden unit more suitable for the site head was predicted to yield a generation loss of only 0.7%. Improvements to fish passage survival with the Alden turbine retrofit are length dependent, yielding a predicted 23% improvement (i.e., an increase from 79% to 97% predicted survival) for 300mm fish
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Session B3: Alden Fish-Friendly Hydropower Turbine: History and Development Status
Full text linkPresenting Author Bio: Douglas Dixon is the Program Manager of EPRI's Fish Protection Issues Program. He has over 40 years of preofessional experience in environmental impact analysis and nearly 20 years in the design and evaluation of fish passagwe and protection technologies. He received a PhD in Marine Fisheries Science from the College of William & Mary and a BA from the State University of New York at Geneseo.Abstract: An innovative technology that has potential to contribute to renewable energy development with reduced impacts on downstream fish passage is the Alden turbine, originally developed by the U.S. Department of Energy’s (DOE) more recently enhanced by the Electric Power Research Institute (EPRI). This turbine is designed to allow the safe passage of fish through the turbine eliminating the need for expensive screens and bypasses and loss of generation via spillage for fish passage. The turbine features a helical-shaped runner with only three blades. Pilot-scale tests demonstrated that fish survival, when scaled to a full-size field installation, would be in excess of 98% for many fish species. EPRI, with DOE support, funded Alden and Voith Hydro to enhance the turbine’s conceptual design performance through modification of the hydraulic passageways, including the spiral case, distributor, runner and draft tube. The final stage of the Alden turbine design effort included a model test at Voith Hydro’s hydraulic laboratory in York, PA, in addition to the updated mechanical and balance of plant equipment sizing necessary for an actual field installation. Model testing indicated a maximum calculated prototype efficiency of almost 94% at conditions corresponding to a prototype net head and flow of 92.0 ft and 1,504 cfs, respectively. The next stage in developing the Alden turbine is a field demonstration project. While EPRI had two field demonstration projects in development, both have been cancelled because of economic reasons unrelated t the cost of the turbine. EPRI is now actively seeking a new demonstration site. The conference presentation will review the detailed results of the mechanical, hydraulic and efficiency performance of the model Alden turbine and its predicted field performance and relative cost compared to conventional Kaplan and Francis turbine designs
Response to the author of the "Parody" published in the Vermont Journal, 30 April 1823
No full textResponse to the author (thought to be Thomas Freelon) of the "Parody" which had been published in the last edition of the Vermont Journal. The parody was critical of Alden Partridge and his school (the American Literary, Scientific, and Military Academy).Transcription by Joseph Byrne. Transcriptions may be subject to error
Letter from Ebenezer Irving to Alden Partridge, 26 October 1825.
No full textWishes to place two of his sons at the Academy; please send information.Transcription by John S. Hitz. Transcriptions may be subject to error. Ebenezer Irving was the brother of the famous author, Washington Irving, 1783-1859
Letter from Wyman Spooner to Alden Partridge, 19 May 1823.
No full textDefends his publication of the "parody" in his newspaper, which Partridge found so offensive to himself and his Academy; will not release the name of the author unless Partridge intends to prosecute him for libel and take the case before a civil tribunal.See letter of 13 May 1823. Transcription by Alison Horner. Transcriptions may be subject to error
Letter from Daniel Hatch to Alden Partridge, 20 February 1828.
No full textRegarding the organization of the military department of his academy; discusses the salary and qualifications he would like in a teacher; Partridge should send someone who conforms to these requirements.Part of cover torn away. The author writes from the unincorporated community of Darvills, Virginia in Dinwiddie County
Letter from John Pintard to Alden Partridge, 5 May 1826.
No full textEbenzer Irving leaves the city to attend the examination; Don Pizarro will be joining the Academy as instructor of the Spanish language; urges Partridge to employ first-rate instructors; understands Partridge is marching his cadets to New Haven and hopes his grandsons and Mr. Wedenstrandt will accompany them.Mentions a pedestrian excursion to New Haven, CT. Ebenezer Irving was the brother of the famous author, Washington Irving, 1783-1859
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