Rooftop Solar Panels

[TimberWolf]

Yea Ive heard of similar systems, like a ground pump, that is essentially a big underground radiator that supplies warmth 24/7, absorbing heat in the ground ...

What I would like to see, if anyone can find such a table, is one comparing heat output to all forms of green energy.


I hate this whole greeny thing, but after I get rid of this house, it's going to be essential as energy prices rise.

Tricky with subsidies involved that even make solar voltaics look competitive, assuming the subsidies last. Not sure if heat pumps are included in subsidies currently, and if not why not? David MacKay is a fan, and is advisor to the Department of Energy and Climate Change, so if not subsidised currently things may change on that front. And dump the solar voltaic subsidy, which is just a big wheeze for chancers.
Ch 21 Page 146: Sustainable Energy - without the hot air | David MacKay

1 watt of electrical energy in, 4 watts of heat energy out. Can't be bad. Seems DIYable too.

[AtW]

1 watt of electrical energy in, 4 watts of heat energy out. Can't be bad. Seems DIYable too.

So all I need is 10 watt battery and a stick with a lightbulb on it?

Neato.

[TimberWolf]

So all I need is 10 watt battery and a stick with a lightbulb on it?

Neato.

Sadly the laws of thermodynamics only allows conversion of high grade energy (electrical) into lower grade (heat) energy with > 100% efficiency. Plus a place to steal the heat from. It's sort of like using energy to walk in to the garden to pick up some hot stones and putting them in the house until they cool down, then using a bit more energy putting them back in the garden when they've cooled down. Hopefully using less energy that it would have taken to heat indoor stones by rubbing them between your thighs.

[AtW]

Sadly the laws of thermodynamics only allows conversion of high grade energy (electrical) into lower grade (heat) energy with

That's where you are wrong.

Do you really think a small electric detonator is incapable of starting a big bada boom?

[TimberWolf]

That's where you are wrong.

Do you really think a small electric detonator is incapable of starting a big bada boom?

Some principle if using piezoelectric lighter to light a gas stove. The gas only burns at 100% efficiency though, maximum.

It turns out that you could instead have used the energy in that gas to create more heat energy than calorific energy content of the gas:

Let me spell this out. Heat pumps are superior in efficiency to condensing boilers, even if the heat pumps are powered by electricity from a power station burning natural gas.
Ch 21 Page 151: Sustainable Energy - without the hot air | David MacKay

[EternalOptimist]

The greatest thing since sliced bread

The BBC loved it

Then it was nearly sliced schoolkids

Two blades flew off

'T HE eco-dream of a village school turned into a Friday 13th nightmare when high winds destroyed their wind turbine.
Two blades flew off from the 15m tall turbine in Gorran School’s playing field during the bad weather earlier this month. The turbine was part of the school’s £53,000 plan to generate its own electricity'



blooming green eejits

[OwlHoot]

That's where you are wrong.

Do you really think a small electric detonator is incapable of starting a big bada boom?

<-- not with you, at you

and what about all the waste heat manufacturing the explosives?

[DimPrawn]

Cleanup costs from Deepwater Horizon ... 20 billion dollars.

Average daily death toll in the coalmining industry: 6.

Kinda puts one failed turbine in perspective .....

Fossil fuel eejits.

So you never fly anywhere then or are you waiting for a lentil powered jet plane?

[EternalOptimist]

green policies, subsidies,manufacture capacity dependency on fossil fuel eejits= 100%

if it wasnt for us eejits, youse eejits would be freezing in the dark

[EternalOptimist]

cost of oil spill on my fuel = fck all squared

cost of green idiocy on my lekky bill = 20%


green eejits