by The Wild Center
Question by Psssst! wanna send a letter?: What’s the difference between a proper Solar water heating panels?
and household radiators painted black and housed in a cloche. Being a tight git I built my Solar water heating system for £180. It’s three 1.2m x .6m panels, a pump and a controller. It gives me tons of hot water on a sunny day and does a bit even when it’s not sunny. So whats the difference? Why do people spend £7000 on solar water heating systems?
Best answer:
Answer by BMSfirst,
good job, it really isnt that difficult, but most people [...]
Fan-Tastic Vent 01100WH Endless Breeze 12V Fan
Instant air flow
Portable
Free-Standing
Compact
Light-Weight (under 5 pounds)
Endless Breeze 12 Volt Fan features instant air flow, portable, free-standing, compact, light-weight (under 5 pounds), multi-purpose, three speeds, low sound levels and low amp. Draw 12 volt plug with cord 12 inch ten blade rotary fan high air volume
List Price: $ 84.95
Price: $ 59.99
New LG Heat/Cool Energy Efficient Window Air Conditioner Cooler Unit with Remote
US $379.00 End Date: Saturday May-26-2012 19:03:22 PDTBuy It Now for only: US $379.00Buy it now | Add to watch list AMANA PTAC DIGISMART ENERGY EFFICIENT AIR CONDITIONER WALL AC [...]
This DIY wind turbine blade is hooked to a 180 Volt Leeson 3.8 Amp Permanent Magnet Electric Motor acting as a generator. Maximum voltage recorded at ground level was 27 volts. Maximum Watts produced was 43 watts.
by sielju
Question by Fynnagin F: what colors should tubes be for a solar water heating system?
Solar energy can be used to heat water for a pool by running water through a series of pipes or tubes. What colour should the pipes be? What other features should this system have to improve its efficiency?
Best answer:
Answer by fill YerbootsMatt black unless you are in a seasonally very sunny area. The black absorbs heat very well, so potentially it could get hot enough to boil the water if you are in an occasionally very hot climate. Some areas use pale colours [...]
by Massachusetts Energy and Environmental Affairs
Question by wwelect2391: How to estimate the energy of a wind turbine?
How to estimate the energy of wind turbine?
how do i estimate the annual energy output of a 5kw wind turbine in an area which has a average wind speed of 7.4m/s at 10m above ground level, and the rated wind speed of the turbine is 10m/s. there is no buildins around to interfear with the wind and the hub of turbine is 12m above ground level. and could you show me the formula for this sum.
Best answer:
Answer by JayIt’s not quite that simple. [...]
Tell Duke Energy to stop destroying our mountains, polluting our air, and poisoning our water. #occupyduke.
Video Rating: 4 / 5
Wells Fargo bank is funding coal companies that use a destructive resource extraction process known as mountaintop removal. Using dangerous explosives, coal companies are blasting the Appalachian Mountains apart, one coal seam at a time. Its ‘cheaper’ for the coal companies to employee five men, explosives and giant machines and use mountaintop removal mining than it is to use traditional underground mining practices which can take five hundred men and much more time. The motivation here is quick, greedy profit. It [...]
