Power Your Document
Windmills
Essay # 19975
Windmills
Examines their history and evolution from 644 A.D. to the 1990s, discussing purposes, technology, designs, theory, materials, efficiency and wind turbines.
2,250 words (approx. 9 pages) |
6 sources |
1993
From the Paper:
"Historically, wind energy conversion systems can be considered as one of man's earliest machines. Windmills, according to documentation, were used in Persia as early as 644 A.D. to grind grain (5:9). Mechanically, the Persian windmill was a development of the watermill--an earlier machine used for turning grains into flour--and it looked a little like one turned up on end. A vertical shaft was set in a square tower, with sails set at right angles to the shaft at its top end. The wind passed through slots in the tower on to the sails, allowing the shaft to turn, as well as any machinery set at the bottom end (2:13).Traditionally, this principle travelled with the prisoners of Ghengis Khan to China, where horizontal mills with matting sails, but without the enclosing tower, were used to drive irrigation machinery. The Chinese discovered that if the ..."
More papers on Windmills:
Cite this paper
APA Citation:
Windmills (2012, January 15). Retrieved February 11, 2012, from http://www.academon.com/Essay-Windmills/19975
MLA Citation:
"Windmills" 15 January 2012. Web. 11 Feb. 2012. <http://www.academon.com/Essay-Windmills/19975>
Downloadable version: $ 41.95
You will be able to download, read and edit this file once you buy this document
Shopping Cart
| Currency: |
Published by:
The Research Group
Publisher Since:
Nov 08, 2002 We have been in the business of writing papers, reports, and essays for over 30 years. All of our writers are professional writers that write academic research for a living. People that buy our papers are always satisfied with their content and quality.
Explore AcaDemon
Buyer Assistance
Seller Assistance
Share Our Success