Comments on: Germany Leads the World in Solar Power http://etbe.coker.com.au/2007/08/01/germany-leads-the-world-in-solar-power/ Linux, politics, and other interesting things Thu, 09 Feb 2012 01:09:24 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: To these people who dont believe Global Warming.. - Page 3 - AllDeaf.com http://etbe.coker.com.au/2007/08/01/germany-leads-the-world-in-solar-power/comment-page-1/#comment-16441 To these people who dont believe Global Warming.. - Page 3 - AllDeaf.com Fri, 24 Oct 2008 21:32:48 +0000 http://etbe.coker.com.au/2007/08/01/germany-leads-the-world-in-solar-power/#comment-16441 [...] Japanese Company Leads World in Solar Power Production – WIN Advisory Group, so is the Germany: Germany Leads the World in Solar Power | etbe - Russell Coker. England is leading in Wind Power: Britain leads the world on wind power - Green Living, [...] [...] Japanese Company Leads World in Solar Power Production – WIN Advisory Group, so is the Germany: Germany Leads the World in Solar Power | etbe – Russell Coker. England is leading in Wind Power: Britain leads the world on wind power – Green Living, [...]

]]> By: Matthew Wright http://etbe.coker.com.au/2007/08/01/germany-leads-the-world-in-solar-power/comment-page-1/#comment-11928 Matthew Wright Wed, 30 Jan 2008 04:06:36 +0000 http://etbe.coker.com.au/2007/08/01/germany-leads-the-world-in-solar-power/#comment-11928 I find Matthew's claims dubious. I have had a Solar hot water service for 7 years. It is gas boosted. I turn the booster off for 6 months of the year. For the other 6 months, if I don't boost the water - it still comes out luke warm. Meaning that some percentage usually 30-99% of the contribution during that 6 months is from the sun. On an annual basis, I am getting 65% of my energy from the sun. Given that my system uses a Titan Stainless tank. It should last for 30+ years and will be well ahead of the 3 or so cheap and nasty mild steal tank systems on energy and greenhouse. Now couple my system with a quantum air source heat pump for boosting, and you can power that by renewables - you have a zero emissions year round hot water service that is highly efficient. Matt I find Matthew’s claims dubious. I have had a Solar hot water service for 7 years. It is gas boosted. I turn the booster off for 6 months of the year. For the other 6 months, if I don’t boost the water – it still comes out luke warm. Meaning that some percentage usually 30-99% of the contribution during that 6 months is from the sun. On an annual basis, I am getting 65% of my energy from the sun. Given that my system uses a Titan Stainless tank. It should last for 30+ years and will be well ahead of the 3 or so cheap and nasty mild steal tank systems on energy and greenhouse.

Now couple my system with a quantum air source heat pump for boosting, and you can power that by renewables – you have a zero emissions year round hot water service that is highly efficient.

Matt

]]> By: etbe http://etbe.coker.com.au/2007/08/01/germany-leads-the-world-in-solar-power/comment-page-1/#comment-2804 etbe Tue, 21 Aug 2007 00:23:56 +0000 http://etbe.coker.com.au/2007/08/01/germany-leads-the-world-in-solar-power/#comment-2804 Matthew: What does "practically no contribution" mean? Note that the energy used in heating water is determined by the temperature change and the mass of the water. So heating 1Kg of water from 10C (probably a common temperature for water from the cold tap) to 35C (tepid) will take more energy than heating it from 35C to 55C (needed to kill bacteria). So if solar power heated the water to 35C is might feel that it wasn't doing much even though it was providing more than half the energy! http://www.ecosmart.com.au/water_guardian.html As for wasting water while waiting for the pipes to heat up. The first thing to do is to insulate the pipes. Good insulation will keep the pipes hot for at least 15 minutes (which means that for most of the hot water use the pipes would not have had a chance to get cold). Also the above URL has a solution to the problem of wasted water when the pipes are cold. Matthew: What does “practically no contribution” mean? Note that the energy used in heating water is determined by the temperature change and the mass of the water. So heating 1Kg of water from 10C (probably a common temperature for water from the cold tap) to 35C (tepid) will take more energy than heating it from 35C to 55C (needed to kill bacteria). So if solar power heated the water to 35C is might feel that it wasn’t doing much even though it was providing more than half the energy!

http://www.ecosmart.com.au/water_guardian.html

As for wasting water while waiting for the pipes to heat up. The first thing to do is to insulate the pipes. Good insulation will keep the pipes hot for at least 15 minutes (which means that for most of the hot water use the pipes would not have had a chance to get cold). Also the above URL has a solution to the problem of wasted water when the pipes are cold.

]]> By: matthew http://etbe.coker.com.au/2007/08/01/germany-leads-the-world-in-solar-power/comment-page-1/#comment-2780 matthew Mon, 20 Aug 2007 11:32:37 +0000 http://etbe.coker.com.au/2007/08/01/germany-leads-the-world-in-solar-power/#comment-2780 with regards to solar hws (im a hotwater installer for 15 years)the truth is 9/10 people boost there solar hws constantly as they run out otherwise. the electric element heat the tank faster than solar can.so there is practicly no solar contribution. must solars i put in waste 5lt of water waiting for the heated water to get to the taps as they are installed on the roof.this is some of the facts there are pleanty more .my ph: 0404818546 matthew with regards to solar hws (im a hotwater installer for 15 years)the truth is 9/10 people boost
there solar hws constantly as they run out otherwise. the electric element heat
the tank faster than solar can.so there is practicly no solar contribution.
must solars i put in waste 5lt of water waiting for the heated water to get to
the taps as they are installed on the roof.this is some of the facts there are
pleanty more .my ph: 0404818546 matthew

]]> By: Don Marti http://etbe.coker.com.au/2007/08/01/germany-leads-the-world-in-solar-power/comment-page-1/#comment-2374 Don Marti Wed, 01 Aug 2007 23:25:43 +0000 http://etbe.coker.com.au/2007/08/01/germany-leads-the-world-in-solar-power/#comment-2374 In a conventional system, you lose about 7% of the power in transmission, so a solar intertie system right where you need the power has that advantage over running it over the grid. What's going on with the famous <a href="http://energy.seekingalpha.com/article/14935" rel="nofollow">Australian solar tower</a>, anyway? In a conventional system, you lose about 7% of the power in transmission, so a solar intertie system right where you need the power has that advantage over running it over the grid.

What’s going on with the famous Australian solar tower, anyway?

]]> By: etbe http://etbe.coker.com.au/2007/08/01/germany-leads-the-world-in-solar-power/comment-page-1/#comment-2363 etbe Wed, 01 Aug 2007 12:35:19 +0000 http://etbe.coker.com.au/2007/08/01/germany-leads-the-world-in-solar-power/#comment-2363 For large-scale generation I believe that wind farms are the best solution. For home-based generation solar PV seems best at the moment. The article I cited references the significant German government subsidies. But we should keep in mind that there have been significant advances in the efficiency of PV systems (in terms of Watts per M^2) and the expense (resource use) of manufacture. More wide-spread use will lead to further developments of the technology. For large-scale generation I believe that wind farms are the best solution. For home-based generation solar PV seems best at the moment.

The article I cited references the significant German government subsidies. But we should keep in mind that there have been significant advances in the efficiency of PV systems (in terms of Watts per M^2) and the expense (resource use) of manufacture. More wide-spread use will lead to further developments of the technology.

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