Books

6. Power from the Wind, by Palmer C. Putnam ($9-95) Van

Nostrand - Reinhold Co., 300 Pike St., Cincinnati, OH 45202; Historical study of the largest wind generator built to date - built in Vermont by Smith-Putnam in the 1940's. Discussion of institutional and technical problems, and solutions for that wind machine.

7. Electric Power From the Wind, by Henry Clews ($2) Solar

Wind Co., -P.O. Box 7, Ea3t Holden, ME 04429; A brief overview of requirements for a complete wind system.

8. Simplified Wind Power Systems for Experimenters, by Jack

Park ($6) Helion, Inc., P.O. Box 445, Brownsville, CA 95919; Written for designers and do-it-yourselfers. (For technically oriented readers.)

9. Wind Machines, by Frank Eldridge, MITRE Corp., Well illus trated historical and technical background document. For sale by the Superintendent of Documents, U.S. Government Printing Office, Washington, D.C. 20402. (Stock No. 038-000-00272-4.)

10. A Siting Handbook for Small Wind Energy Conversion Sys tems, by H.L. Wegley, Battelle Pacific Northwest Laboratories, Richland, WA. Will be available from the National Technical Information Service.

11. Legal-Institutional Implications of Wind Energy Conversion

Systems, George Washington University, Washington, P.C., September, 1977. Available from the National Technical Information Service. (Report No. NSF/RA-770203.)

R-l nc airfoil amp-hours amperes or amps anemometer asynchronous generator current cut-in speed cut-out speed dc diode drag efficiency (e)

i energy alternating electric current (Than. 5)

a curved surface designed tc create V i f t * flows over its surface (C.:a.j. ¿)

see amps, calculated by r.,jlti.-Iyirg, r^rron-, flc by number of hours it flows (Chap. 5)

an instrument for measuring iir.d speed (Chip, j an electric generator designed to produce an alternating current thut r-tv-..- -; -x.1 -^r.\ng power source (e.g., utility m&ina) so the tw • sources can be combined oo power cne load (e £., your home). The generator does lot h-ave to .ui: at a precise rpm to res»aia u& correct frequency or phase; see also synchronous generator (Chjp.

flow of electricity through .-/ires (Chap. 5/

wind speed at which wind turbine begins to produce power (Chap. 3,5)

wind speed at which wind turbine is shut down to prevent high wind damage (Chap. 5). U so furling speed.

direct electric current; does not alternate direction of electric flow as does ac (Chap. 5.

see also rectify, an electric device whi^h changes ac to dc (Chap. 5)

a force which "slows down" the motion of wind turbine blades, or actually causes motion aro power to be produced by drag type wind machines (Chap. 2,5)

a number arrived at by di/Idir.g the power output of a device,by the power input to that device (usually the larger of the two numbers); usu ally expressed as a percentage value; see al =>o power coefficient; (Chap. 2,5)

a measure of the amount of work that can be, or has been done; expressed in kilowatt-hours (kWh; or horsepower-hours (hphr) (Chap. 2,3.4,5)

energy density energy rose fantail furling speed gear ratio gin pole head head loss horsepower (hp)

horsepower-hour (hphr)

inverter kilowatt (kW)

kilowatt-hour (kWh)

lift a ratio of energy per pound; a rating usually used to compare different batteries (Chap. 5)

see also wind rose, a diagram which presents wind energy measurements from a site analysis in relation to the direction from which the wind occurs at the site (Chap. 3 and example in Fig. 3-6)

a propeller-type wind turbine mounted sideways on a larger wind machine (horizontal-axis type) to keep that machine aimed into the wind (Chap. 1, 5)

the wind speed at which the wind machine must be shut down to prevent high wind damage (Chap. 5). Also cut-out speed.

a ratio of speeds (rpm) between the rotor power shaft and the pump, generator, or other device power shaft; applies both to speed- ' increasing and speed-decreasing transmissions (Chap. 5)

a pipe, board, or tower used to improve leverage while raising a tower (Chap. 6)

a measure of height a pump must lift water Chap. 4)

a measure of friction loss caused from water flow through pipes (Chap. 4)

a measure of power; 550 pounds raised one foot per one second (Chap. 2,5)

a measure of energy, see also energy (Chap. 2,3, 4 ; 5 )

a device which converts dc to ac; generates its own frequency and voltage references; see also synchronous inverter (Chap. 5)

a measure of power; one horsepower equals 776 watts, or 0.776 kilowatts (Chap. 4,5)

a measure of electric energy, (1000 watt-hours), see also kilowatt, horsepower, and hcrsepower-hour (Chap. 4,5)

the force which "pulls" a wind turbine blade along, as opposed to drag (Chap. 2,5)

megawatt meteorological station panemone power power coefficient rated power rated speed rectify resistor return time rotor rotor efficiency rotor power coefficient run of the wind cr.e million watts location where the weather is recorded ("hap. 3)

a name for drag-type vertical axis wind machiras; coming from pan (all directions) and anemone (wind), it could describe Darrieus type machines also, but is not generally used except for drag machines (Chap. 1,5)

the rate work is performed - mechanical power is force times velocity (see horsepower); electric power is volt times amps ratio of power output to power input; often referred to as efficiency (Chap. 5)

the power output (watts or horsepower) of a wind machine; can be its maximum power, or a power output at some wind speed less than the maximum speed before governing controls reduce the power (Chap. 5)

wind speed at which rated power occurs; can be speed at which a governor takes over, or can be a wind speed lower than this; an industry standard for rated speed does not exist at this time (Chap. 5)

convert ac to dc, see also diodes (Chap. 5)

an electric device which "resists" electric current flow, used to control current (e.g., field-current in a generator) (Chap. 5)

time before the wind returns to a higher, specified value, such as the cut-in speed of a windmill (Chap. 3)

the power producing structure of a wind turbine (e.g., the blades) (Chap. 5)

the efficiency of the rotor only; does not include transmissions, pumps, generators, or line or head loss (Chap. 5)

same as rotor efficiency the distance the wind travels during a specific time period; this usually refers to the dial reading from a wind anemometer (Chap. 3)

shelter belt sine wave solidity square wave synchronous generator synchronous inverter torque turbulence voltage watt watt-hour watt per square meter

Renewable Energy 101

Renewable Energy 101

Renewable energy is energy that is generated from sunlight, rain, tides, geothermal heat and wind. These sources are naturally and constantly replenished, which is why they are deemed as renewable. The usage of renewable energy sources is very important when considering the sustainability of the existing energy usage of the world. While there is currently an abundance of non-renewable energy sources, such as nuclear fuels, these energy sources are depleting. In addition to being a non-renewable supply, the non-renewable energy sources release emissions into the air, which has an adverse effect on the environment.

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