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  • 1975-1979  (10)
Collection
Keywords
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Year
  • 1
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    Wind power (1975)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: A historical background on windmill use, the nature of wind, wind conversion system technology and requirements, the economics of wind power and comparisons with alternative systems, data needs, technology development needs, and an implementation plan for wind energy are presented. Considerable progress took place during the 1950's. Most of the modern windmills feature a wind turbine electricity generator located directly at the top of their rotor towers.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    ERDA-NASA wind energy project ready to involve users (1976)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: The NASA contribution to the Wind Energy Project is discussed. NASA is responsible for the following: (1) identification of cost-effective configurations and sizes of wind-conversion systems, (2) the development of technology needed to produce these systems, (3) the design of wind-conversion systems that are compatible with user requirements, particularly utility networks, and (4) technology transfer obtained from the program to stimulate rapid commercial application of wind systems. Various elements of the NASA program are outlined, including industry-built user operation, the evaluation phase, the proposed plan and schedule for site selection and user involvement, supporting research and technology (e.g., energy storage), and component and subsystem technology development.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: Energy; 1; Winter 1
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Introduction to wind energy conversion systems technology (1975)
    In:  Other Sources
    Details
    Publication Date: 2011-08-17
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: Mitre Corp. Proc. of the 2d Workshop on Wind Energy Conversion Systems; p 197-201
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Wake characteristics of an eight-leg tower for a MOD-0 type wind turbine (1977)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Low speed wind tunnel tests were conducted to determine the flow characteristics of the wake downwind of a 1/25th scale, all tubular eight leg tower concept suitable for application to the DOE-NASA MOD-0 wind power turbine. Measurements were made of wind speed profiles, and from these were determined the wake local minimum velocity, average velocity, and width for several wind approach angles. These data are presented herein along with tower shadow photographs and comparisons with data from an earlier lattice type, four leg tower model constructed of tubular members. Values of average wake velocity defect ratio and average ratio of wake width to blade radius for the eight leg model were estimated to be around 0.17 and 0.30, respectively, at the plane of the rotor blade. These characteristics suggest that the tower wake of the eight leg concept is slightly less than that of the four leg design.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-TM-73868 , E-9463 , DOE/NASA/1028-77/14
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    Wake characteristics of a tower for the DOE-NASA MOD-1 wind turbine (1978)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A 1/40th scale model of a tower concept designed for a MOD-1 wind power turbine was tested in a low speed wind tunnel. Wake wind speed profiles were measured, and from these were determined local values of wake minimum velocity ratio, average velocity ratio, and width over a range of tower elevations and wind approach angles. Comparison with results from two other all tubular models (MOD-0 and eight leg designs) tested earlier in the same tunnel indicated that wake width and flow blockage at the rotor plane of rotation were slightly larger for the MOD-1 tower than for the other two models. The differences in wake characteristics were attributed to differences in tower geometry and member dimensions.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-TM-78853 , E-9575 , DOE/NASA/1028-78/17
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 6
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    Some techniques for reducing the tower shadow of the DOE/NASA mod-0 wind turbine tower (1979)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Wind speed profile measurements to measure the effect of a wind turbine tower on the wind velocity are presented. Measurements were made in the wake of scale models of the tower and in the wake of certain full scale components to determine the magnitude of the speed reduction (tower shadow). Shadow abatement techniques tested on the towers included the removal of diagonals, replacement of diagonals and horizontals with round cross section members, installation of elliptical shapes on horizontal members, installation of airfoils on vertical members, and application of surface roughness to vertical members.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-TM-79202 , DOE/NASA/20370-79/17 , E-087
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 7
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    An experimental 100 kilowatt wind turbine generator (1975)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Experimental generator consists of two blades mounted on 100 foot tower, driving transmission train and electric generator mounted on top of tower. Machine generates 100 kW of electricity at wind speeds from 18 to 60 miles per hour. Yaw control mechanism automatically orients machine into wind.
    Keywords: PHYSICAL SCIENCES
    Type: LEW-12509
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 8
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    Wind tunnel measurements of the tower shadow on models of the ERDA/NASA 100 KW wind turbine tower (1976)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Detailed wind speed profile measurements were made in the wake of 1/25 scale and 1/48 scale tower models to determine the magnitude of the speed reduction (the tower shadow). The 1/25 scale tower modeled closely the actual wind turbine including the service stairway and the equipment elevator rails on one face. The 1/48 scale model was made of all tubular members. Measurements were made on the 1/25 scale model with and without the stairway and elevator rails, and on the 1/48 all tube model without stairs and rails. The test results show that the stairs and rails were a major source of wind flow blockage. The all tubular 1/48 scale tower was found to offer less resistance to the wind than the 1/25 scale model that contained a large number of square sections. Shadow photos are included to show the extent of the blockage offered to the wind from various directions.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-TM-X-73548 , E-8984
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 9
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    Plans and status of the NASA-Lewis Research Center wind energy project (1975)
    In:  Other Sources
    Details
    Publication Date: 2019-07-27
    Description: This report describes that portion of the national five-year wind energy program that is being managed by the NASA-Lewis Research Center for the ERDA. The Lewis Research Center's Wind Power Office, its organization and plans and status are briefly described. The three major elements of the wind energy project at Lewis are the experimental 100 kW wind-turbine generator; the first generation industry-built and user-operated wind turbine generators; and the supporting research and technology tasks which are each briefly described.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Format: text
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    NASA TECHNICAL REPORTS
  • 10
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    Plans and status of the NASA-Lewis Research Center wind energy project (1975)
    In:  CASI
    Details
    Publication Date: 2019-07-27
    Description: Wind energy is investigated as a source of energy. The wind energy program that is managed by the NASA-Lewis Research Center is described. The Lewis Research Center's Wind Power Office, its organization, plans, and status are discussed. Major elements of the wind power project included are: an experimental 100 kW wind-turbine generator; first generation industry-built and user-operated wind turbine generators; and supporting research and technology tasks.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-TM-X-71701 , E-8309
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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