The use of wind as a replenishable energy resource has come back into favour in recent decades. It is much promoted as a viable, clean energy option that will help towards reducing CO[subscript 2] emissions in the UK. This article examines the history of wind power and considers the development of wind turbines, together with their economic,…

Electricity from osmotic pressure might seem a far-fetched idea but this article describes a prototype in Norway where the osmotic pressure generated between salt and fresh water drives a turbine. This idea was applied in a student investigation, where they were tasked with researching which alternative materials could be used for the…

Harnessing energy from the tides is a much-promoted but rarely realised way of generating electricity. This article examines some of the systems that are currently in use or under development, and outlines their economic, environmental and technical implications.

The article describes an innovative project for year 9 (age 13-14) students that has run since 2002 with the help of professional engineers and scientists and incorporates careers information and hands-on practical work. The programme was developed to highlight alternative energy as a subject and also to provide a hands-on practical day for the…

Provides a brief account of early attempts to concentrate the sun's radiation for heating purposes and reports on 20th-century attempts to do the same, including the solar furnace in the French Pyrenees. Includes a discussion of the solar constant and its applications. (DDR)

Reviews the history of the steam turbine at sea from the 1880s to modern turbines. Presents several pictures of various types of turbines. (YP)

Energy problems that incorporate power generation in hydroelectric, fossil-fuel burning, and nuclear power stations are presented. The burning process and the energy released are discussed. Practice problems and solutions, a summary of various energy units and conversion factors, and lists of thought-provoking energies and powers are included. (KR)

Provides background information and suggestions for concrete experiences to help nonscientists teaching 5- to 13-year-old children. Includes a list of 25 ideas for energy activities and a list of 10 key energy concepts. (JM)