Solar Thermal: vacuum tubes ???

Heating, insulation, ventilation, VMC, cooling ... short thermal comfort. Insulation, wood energy, heat pumps but also electricity, gas or oil, VMC ... Help in choosing and implementation, problem solving, optimization, tips and tricks ...
chris34
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Solar Thermal: vacuum tubes ???




by chris34 » 09/10/12, 15:55

Hello everyone !

I see a lot of ads praising the almost miraculous product of solar panels with "vacuum tubes"!

Some of you would they have info and / or experience on this techno. ??

Thank you in advance :P

Chris.
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dedeleco
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by dedeleco » 09/10/12, 16:28

Read and watch the curves on apper:

http://www.apper-solaire.org/?Capteurs

http://www.apper-solaire.org/?Faq

See various posts on econology, with sometimes, also problems of frost and snow.
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moinsdewatt
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Re: Solar thermal: vacuum tubes ???




by moinsdewatt » 09/10/12, 18:53

chris34 wrote:Hello everyone !

I see a lot of ads praising the almost miraculous product of solar panels with "vacuum tubes"!

Some of you would they have info and / or experience on this techno. ??

Thank you in advance :P

Chris.


There is nothing '' miraculous '' about it.

The performance is a little better than conventional flat solar panels, but it is more expensive.

It is recommended for small roof areas.
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dedeleco
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by dedeleco » 09/10/12, 20:03

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dedeleco
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by dedeleco » 09/10/12, 21:18

Another in-depth study on 88 different places in England and Ireland, very little difference for domestic water, but the mode of use is much more important:

http://www.ecologics.ie/wp-content/uplo ... 0study.pdf

In the field trial, there was little difference between the
total solar energy yield of those installations that used
flat-plate solar collectors and those that used
Evacuated-tube solar collectors



The trial found that the way householders use their solar
water heating system is critical in achieving the best
results from solar water heating systems. Better advice
to users on how to control their solar water heating
systems (in terms of volume of hot water use, timing of
back-up heating and hot water use, and temperatures
required) is essential

A well-installed and properly used solar water heating
system is likely to provide carbon savings. The typical
savings are 230kg / year when replacing gas and 510kg / year
when replacing electric immersion heating.

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dedeleco
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posts: 9211
Registration: 16/01/10, 01:19
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by dedeleco » 09/10/12, 22:05

Another in-depth study on 88 different places in England and Ireland, very little difference for domestic water, but the mode of use is much more important:

http://www.ecologics.ie/wp-content/uplo ... 0study.pdf

In the field trial, there was little difference between the
total solar energy yield of those installations that used
flat-plate solar collectors and those that used
Evacuated-tube solar collectors



The trial found that the way householders use their solar
water heating system is critical in achieving the best
results from solar water heating systems. Better advice
to users on how to control their solar water heating
systems (in terms of volume of hot water use, timing of
back-up heating and hot water use, and temperatures
required) is essential

A well-installed and properly used solar water heating
system is likely to provide carbon savings. The typical
savings are 230kg / year when replacing gas and 510kg / year
when replacing electric immersion heating.

0 x

 


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