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Science
HOME PLANET
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PROGRAMME INFO
Tuesday 15:00-15:30
Richard Daniel chairs the interactive environmental programme in which he and his guests deal with listener's questions and concerns.
Call 0370 010 0400
home.planet@bbc.co.uk
Home Planet, PO Box 3096, Brighton BN1 1PL
LISTEN AGAINListen 30 min
Listen to 27 February 2007
PRESENTER
RICHARD DANIEL
Richard Daniel
PROGRAMME DETAILS
Tuesday 27 February 2007
Earth ©NASA

Panel

Dr Lynn Dicks

Professor Graham Underwood

Professor Philip Stott



TOPICS


Tree loss in the re-creation of lowland heaths

Natural England

UK Biodiversity Action Plan

Forestry Commission

RSPB

Dorset Heath's project


Ships hitting whales

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Energy from Kelp

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Trends in Japan


Domestic power from cycling

Professor Stott's calculations:

Ever optimistic, let's assume a small, highly-efficient, ecohouse requiring our cyclist to produce, on a sunny day, about 2 usable kilowatt hours (kWh) of energy (remember energy is measured in kilowatt hours).

A reasonable cyclist can produce about 260 W (watts) of peak power, although the figure for more continuous cycling is likely to fall to around 150 watts, and this is probably only truly sustainable for some 30 minutes. You therefore would need between 8 to 14 cyclists pedaling furiously for one hour to get anywhere near sustaining even the tiny demands of our ecofriendly house.

A top racing cyclist, a Super-Pedaller, by contrast, with around 150 rpm at crank, could just about produce, in old fashioned terms, 0.6 HP (horsepower), or some 440 watts of peak power. In this case, you would want around 5 'Tour de France'-level cyclists peddling in line with effortless ease for an hour or so, although this does not really allow for friction, energy efficiency loss, or sheer exhaustion!

Doctor Barnett's Amazing Audio Solar Cyclonator


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Home Planet
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