ARTICLE FEED SITE FEED

Horsepower hour

  • Oops!
  • The website id is invalid.
  • The website id is invalid.

Horsepower hour

Published: December 22, 2006, 3:19 pm
Updated: December 22, 2006, 3:19 pm
Lead Author: Cutler Cleveland
Topics: Units Energy
Rate:
This article has been reviewed by the following Topic Editor: Peter Saundry

Definition

Horsepower-hour is a unit of energy or work equal to the work done by one horsepower in one hour. Horsepower is the unit of power in the English system of measurement. The SI unit of energy is the joule.

One joule = 3.73·10-7horsepower-hour.

History

The term horsepower was coined by James Watt (1736-1819), the Scottish inventor and mechanical engineer renowned for his improvements of the steam engine. A horse, harnessed to an appropriate machine, can lift 550 pounds at the rate of 1 foot per second.

Conversions

1 horsepower-hour = 1.97·106 foot-pound
1 horsepower-hour = 6.42·102 kilocalorie (thermal)
1 horsepower-hour = 2.55·10s Btu (thermal)
1 horsepower-hour = 2.68·106 joules
1 horsepower-hour = 0.746 kilowatt-hours
1 horsepower-hour = 2.6813 ergs
1 horsepower-hour = 1.67·1025 electron-volts
1 horsepower-hour = 2.68·1013 dyne-centimeters

Further reading

Citation

Cutler Cleveland (Lead Author);Peter Saundry (Topic Editor) "Horsepower hour". In: Encyclopedia of Earth. Eds. Cutler J. Cleveland (Washington, D.C.: Environmental Information Coalition, National Council for Science and the Environment). [First published in the Encyclopedia of Earth December 22, 2006; Last revised Date December 22, 2006; Retrieved February 10, 2012 <http://www.eoearth.org/article/Horsepower_hour>

The Author

Cutler Cleveland Editor-in-Chief The Encyclopedia of Earth Cutler J. Cleveland is the founding Editor-in-Chief of the Encyclopedia of Earth. Dr. Cleveland is currently a Professor in the Department of Geography and Environment at Boston University, with joint appointments in the Center for Energy and Environmental Studies and the Pardee Center for the Study of the Longer Range Future. He also is a Senior Fellow at the National Council for Science and the Environment in Washington D.C. Dr. Cleveland is als ... (Full Bio)

Add Comment

Comments

There are no comments.

Add Comment



You must be logged in to post a comment. Click here to login.