Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 17 of 17
Full-Text Articles in Engineering
Design And Evaluation Of The Umass Wf-1 Kilowatt Hour Meter, Michael George Edds, Duane Cromack
Design And Evaluation Of The Umass Wf-1 Kilowatt Hour Meter, Michael George Edds, Duane Cromack
Wind Energy Center Reports
A kilowatt-hour meter was designed, built and evaluated for use with the UMass Wind Furnace. A meter, capable of measuring the variable frequency variable voltage output of the wind turbine, was needed. This report describes this somewhat unique instrument, including its design and calibration.
The Flow Field Upstream Of A Horizontal Axis Wind Turbine, K. Modarresi, R. H. Kirchhoff
The Flow Field Upstream Of A Horizontal Axis Wind Turbine, K. Modarresi, R. H. Kirchhoff
Wind Energy Center Reports
A mathematical model is developed for a steady-state axi-symmetric upstream flow of a porous disc, in a uniform flow field . The special case of the upstream flow of a windmill, with and without a nacelle, is treated. First, the windmill is considered as a uniform distribution of sources and then as a linear distribution of sources. Solutions for the blade disc o f the wind field upstream are obtained in the form of stream1 ines and velocity vector components. Sample flow patterns upstream o f the blade disc o f the UMass 25 kW wind turbine are presented for …
Wind Field Analysis Around A Horizontal Axis Wind Turbine, B. C. Donner, R. H. Kirchhoff
Wind Field Analysis Around A Horizontal Axis Wind Turbine, B. C. Donner, R. H. Kirchhoff
Wind Energy Center Reports
The dynamic interaction between the WMass 25 kW wind turbine, WF-1, and the local, turbulent wind field is investigated. The integral length scale for wind speed gusts is found to range from 40 to 200 m. The system i s seen to behave as a low pass filter with a cutoff frequency of 0.03 Hz. Power i n the wind with gust frequencies below the cutoff frequency is available to the wind turbine. This represents approximately 70% of the total power in the turbulence, and about 5% of the total power in the wind. The power extraction is independent
of …
Performance Matching Of Hydraulic Energy Converters And Wind Turbines For Heating Purposes, M. G. Rolland Jr., Duane E. Cromack, William E. Heronemus
Performance Matching Of Hydraulic Energy Converters And Wind Turbines For Heating Purposes, M. G. Rolland Jr., Duane E. Cromack, William E. Heronemus
Wind Energy Center Reports
An investigation of a fluid brake device designed to convert wind energy to heat is reported for small to moderate size wind turbine applications. Fluid devices of three different geometries with vaned rotors were examined for power capacity and operating range. Converted size and geometry was related to rotational speed through a parametric study of the wind turbine and fluid energy converters. Wind tunnel tests, laboratory experiments, and analytic techniques lead to the development of three candidate hydraulic convertersmatching the 10m diameter Wind Furnace Model Four.
A Continuation Of The Investigation Of The Feasibility Of Using Windpower For Space Heating In Colder Climates, Duane E. Cromack
A Continuation Of The Investigation Of The Feasibility Of Using Windpower For Space Heating In Colder Climates, Duane E. Cromack
Wind Energy Center Reports
No abstract provided.
Microprocessor Based Control System For The Umass Wind Furnace I, Daniel Handman, Richard Monopoli
Microprocessor Based Control System For The Umass Wind Furnace I, Daniel Handman, Richard Monopoli
Wind Energy Center Reports
To maximize the efficiency of the UMass Wind Furnace I, a microprocessor based control system has been designed. The system can control blade pitch angle, yaw direction, and generator field current. The control scheme for the system is determined by the microprocessor program. Therefore, this control system can also be used to simulate various types of mechanical, electro-mechanical, electronic, and hydraulic controllers by writing an appropriate control program.
Design And Construction Of The Polematcher, Main Frame, And Transmission Drive For Wind Furnace I (Wf-1), Fred A. Antoon
Design And Construction Of The Polematcher, Main Frame, And Transmission Drive For Wind Furnace I (Wf-1), Fred A. Antoon
Wind Energy Center Reports
No abstract provided.
Wind Turbine Blade Stress Analysis And Natural Frequencies, F. W. Perkins, Duane E. Cromack
Wind Turbine Blade Stress Analysis And Natural Frequencies, F. W. Perkins, Duane E. Cromack
Wind Energy Center Reports
There are many problems to be addressed with respect to the design o f wind turbine blades. Foremost among these are aerodynamic performance, structural integrity and cost. The subject of aerodynamic performance, at least in the steady state condition, has been dealt with at some length by various investigators. The cost of a blade system is beyond the scope of this paper. The structural integrity o f wind turbine blades must be insured in both the static and dynamic load cases. The critical static load has been determined to be a hurricane wind perpendicular t o the blade planform. The …
A Preliminary Investigation Of Three Advanced Wind Furnace Systems For Residential And Farm Applications: Executive Summary, Paul. H. Sarkisian, John G. Mcgowan
A Preliminary Investigation Of Three Advanced Wind Furnace Systems For Residential And Farm Applications: Executive Summary, Paul. H. Sarkisian, John G. Mcgowan
Wind Energy Center Reports
This report summarizes the results of an analytical performance and economic evaluation of three advanced wind furnace heating systems. The work represents an extension of previous work on wind powered heating systems and extends this wind energy application to the supply of electricity as well as space and hot water energy loads for rural residences and farms. Details of the proposed systems and the analytical modeling of the overall system and subcomponents are presented as well as typical system energy and economic performance.
Investigation Of The Feasibility Of Using Windpower For Space Heating In Colder Climates, Duane E. Cromack
Investigation Of The Feasibility Of Using Windpower For Space Heating In Colder Climates, Duane E. Cromack
Wind Energy Center Reports
A sumnary of the activities and results of the research on the UMASS Solar Habitat-I and Wind Furnace project is given. A general background and review followed by specific work under each task is presented. Lists of publications to date and participating personnel are included.
A Preliminary Investigation Of Three Advanced Wind Energy Systems For Residential And Farm Applications, Paul. H. Sarkisian, John G. Mcgowan
A Preliminary Investigation Of Three Advanced Wind Energy Systems For Residential And Farm Applications, Paul. H. Sarkisian, John G. Mcgowan
Wind Energy Center Reports
This report is primarily concerned with an analysis of advanced wind driven energy systems. Three such systems, the Improved Wind Furnace System and the Wind Driven Total Energy Systems, Types I and II, for the supply of energy to electrical, space heating and domestic hot water loads are considered for new England residential and farm applications. These systems are studied with the aid of an interactive digital computer simulation (WDTEST) and an economics program (WSDECO). Although the programs incorporate some idealizations, they represent a necessary preliminary investigation of the total system and its components. The computer models are designed to …
Wind Turbine Design, Performance, And Economic Analysis, James H. Sexton
Wind Turbine Design, Performance, And Economic Analysis, James H. Sexton
Wind Energy Center Reports
This paper is an investigation of the economic feasibility of small scale (1 to 70 kw) wind energy conversion systems (WECS). It can be shown that the wind system productivity and therefore the relative cost of the product which it produces is completely dependent on the wind regime under consideration. The mean wind speed, standard deviation, and wind profile are the most significant parameters to be used in the investigation of cost of product from a wind system. The purpose of this work is not to find an optimum wind system, but to give the reader enough information to make …
Preliminary Report: Umass Wind Turbine Operation, None Listed
Preliminary Report: Umass Wind Turbine Operation, None Listed
Wind Energy Center Reports
No abstract provided.
Investigation Of The Feasibility Of Using Windpower For Space Heating In Colder Climates. Phase Ii Progress Report., William E. Heronemus, Duane E. Cromack
Investigation Of The Feasibility Of Using Windpower For Space Heating In Colder Climates. Phase Ii Progress Report., William E. Heronemus, Duane E. Cromack
Wind Energy Center Reports
No abstract provided.
Wind And Solar Residential Heating Systems. Energy And Economics Study, Ghazi Darkazalli, John G. Mcgowan
Wind And Solar Residential Heating Systems. Energy And Economics Study, Ghazi Darkazalli, John G. Mcgowan
Wind Energy Center Reports
This work is primarily concerned with the analytical design of wind space and water heating systems for residences. A development of a digital computer based methodology to calculate system performance and costs is presented. In addition to wind powered systems, solar, and combined wind and solar systems are considered in detail. The analysis i s based on two separate computer programs: An energy program that determines system performance as a function of subcomponent parameters and auxiliary energy requirements, and an economics program that calculates present and future (mass produced) costs of the wind and/or solar components and system. Complete details …
Instrumental And Initial Experimental Testing Of Solar Habitat I, L. S. Socha, John G. Mcgowan
Instrumental And Initial Experimental Testing Of Solar Habitat I, L. S. Socha, John G. Mcgowan
Wind Energy Center Reports
This report presents a description of the analytical and experimental procedures used to determine the performance of all subsystems and models for Solar Habitat I. It includes a description of the instrumentation necessary for evaluating all subsystems and models and the corresponding test methods used. Experimental test data is presented and compared with the results based on previously developed analytical models.
Investigation Of The Feasibility Of Using Windpower For Space Heating In Colder Climates. Phase Ii Final Report., William E. Heronemus, Duane E. Cromack
Investigation Of The Feasibility Of Using Windpower For Space Heating In Colder Climates. Phase Ii Final Report., William E. Heronemus, Duane E. Cromack
Wind Energy Center Reports
No abstract provided.