A new era for windmill power; high-tech models attracting utilities

Article Abstract:

High technology windmills, or wind turbines, in Livermore, CA, are attracting attention as alternative and economical energy generators. The modern-day windmills are pollution free and are competitive with fossil fuels as far as cost is concerned. By using high technology fiberglass propeller blades that are controlled by computers, the wind turbines are able to provide uniform power despite wind variations. US Windpower, the sole American company that builds windmills, developed the technology by combining principles of aerodynamics and microelectronics. With variable-pitch blades from airplanes, the company created a system that allows the blades and the generator to turn in response to wind velocity. Computers manipulate electronic circuits to control the wind flow over the blades and generate electric current that alternates at the correct cycles.

Turbines and turbine generator sets, Innovations, High technology, Wind power, Product introduction, Windmills, Energy, New Technique, U.S. Windpower Inc.

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Pondering the fate of old hardware

Article Abstract:

The rapid changes in microcomputer technology results in obsolescence that happen just as swiftly. The PC-XT, which cost $3,875 in 1985, now sells for about $200 at Crocodile Computers, one of the few places that handle old computers. For users who are wondering what to do with their old machines, some suggestions are: make the machines function as print spoolers for storing files that can be fed into a printer slowly, use them as hosts for a fax modem card so that they can function as fax machines, and replace the PC-XTs that are worn out. Those who want to buy old machines should, however, be aware that hard disks generally do not last a long time and replacing them would cost more than a new computer.

Microcomputers, Column, Design and construction, Hardware, Product obsolescence, End users, Used computer hardware, User Need, Microcomputer, Used Equipment, Obsolescence

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