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Publication Investigation of the Feasibility of Using Windpower for Space Heating in Colder Climates. Phase II Progress Report.(1977) Heronemus, William E.; Cromack, Duane E.Publication Microprocessor Based Control System For The Umass Wind Furnace I(1978) Handman, Daniel; Monopoli, RichardTo 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.Publication Investigation of the Feasibility of Using Windpower for Space Heating in Colder Climates. Phase II Final Report.(1976) Heronemus, William E.; Cromack, Duane E.Publication Design And Evaluation Of The Umass WF-1 Kilowatt Hour Meter(1979) Edds, Michael George; Cromack, DuaneA 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.Publication Wind Field Analysis Around A Horizontal Axis Wind Turbine(1979) Donner, B. C.; Kirchhoff, R. H.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 the wind direction fluctuations when the nacelle yaw is damped.Publication Wind And Solar Residential Heating Systems. Energy And Economics Study(1977) Darkazalli, Ghazi; McGowan, John G.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 of all parts of the model, which is intended to be a general design tool for such systems, are presented. The results include a detailed series of runs based on hourly weather and solar data for a "typical" New England site, using an "Average" and "Mociel" (well insulated) residence model. Also, additional runs are presented for other sites and residences. The performance and economic results show that wind and/or solar systems are presently competitive with electric based heating systems. It is also shown that in the future such systems will be competitive with oil or natural gas heating systems.Publication Investigation of the Feasibility of Using Windpower for Space Heating in Colder Climates(1978) Cromack, Duane E.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.Publication Design And Installation Of A Heating System For A Solar And Windpower Heated Home(1976) Wells, Ward DyerThis report briefly outlines the progress to date of Solar Habitat One and the New England Wind Furnace Project at the University of Massachusetts at Amherst. The design and installation of the solar and windpower heating systems of this combined project are discussed in detail. A summary of planned future modifications and suggested improvements is presented.Publication Design And Installation Of Heating System For Umass Solar Habitat I(1976) Wells, Ward Dyer; McGowan, John G.This report contains details of design principles and installation of the solar and windpowered heating systems installed in UMass Solar Habitat I. Included are a complete specification of materials and operating instructions. A summary of potential modifications and improvements to the system is also included.Publication A Two Dimensional Analysis Of Vertical Axis Windmills(1978) Van Dusen, E. S.Publication Wind Turbine Tower Wake Interface(1979) Turnberg, J.; Cromack, Duane E.Publication Wind Tunnel Test Program Of A 200-Watt, 12-Volt Wind Generator System. Final Report(1976) Stoddard, Forrest S.; Edds, Michael GeorgeIn March, 1974, a small wind generator was purchased under the Mark Swann Account for the Energy Alternatives Program of the University of Massachusetts Engineering Department. The wind generator (Reference 1) was acquired as a demonstration, teaching, and research tool, and serves as atest stand in the University of Massachusetts Open Jet Wind Tunnel Facility (Reference 2). During the time period 15 March to 15 July, 1974, the wind generator system was fully tested and calibrated i n the wind tunnel facility , and has been used since then as a valuable teaching and research aid i n the Energy Alternatives Program. An additional test hub was manufactured in April, 1974, and several model blades were run during a practical windpower course offered through the School of Continuing Education on the Amherst campus. These model blades were constructed by the class members primarily as a teaching technique, and were never intended to be rigorous wind tunnel models. However, the results of that program did amplify observations concerning small scale wind generators (see Part 8: Conclusions and Observations). During the Fa1 1 and Spring semesters, 1974-1975, two graduate engineering courses were offered in the Civil, and Mechanical and Aerospace Engineering Departments, on Windpower Systems Engineering, as part of the Energy Alternatives Program. The wind tunnel test experience with the model rotors served as valuable background and demonstration for the courses. Since then, further blade performance research has been accomplished in the wind tunnel facility under National Science Foundation sponsorship (NSF Grant AER-00603).Publication Structural Dynamics, Stability And Control Of High Aspect Ratio Wind Turbines(1978) Stoddard, Forrest S.Publication Publication Discussion Of Momentum Theory For Windmills(1976) Stoddard, Forrest S.Publication Instrumental and Initial Experimental Testing of Solar Habitat I. Revised(1978) Socha, L. S.; McGowan, John G.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.Publication Instrumental and Initial Experimental Testing of Solar Habitat I(1977) Socha, L. S.; McGowan, John G.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.Publication Wind Turbine Design, Performance, And Economic Analysis(1978) Sexton, James H.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 an informed decision as to whether or not a wind system configuration could meet the particular need under consideration; the wind system appropriate to a residential home owner is quite different from that for a dairy farmer, for example. The decision ultimately boils down to the cost of usable energy, i.e., cents/kwhr of those kwhrs thatcan be used. Various wind machines will be designed and priced. They will then be superimposed onto different wind regimes modeled by the Weibull distribution for a first approximation of the cost of product at that site using that machine. It will be clear that the same machine will have different cost effectiveness at different sites, and that the cost-ofuseful-energy-product will vary, site-to-site, for the same machine.Publication A Preliminary Investigation of Three Advanced Wind Furnace Systems For Residential and Farm Applications: Executive Summary(1978) Sarkisian, Paul. H.; McGowan, John G.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.Publication Preliminary Report: Umass Wind Turbine Operation(1977) Listed, None