[Greenbuilding] new solar heating system in this country

[Bruno M.]

Probably ( at least) half a scam,
they may claim no pump but instead they use a compressor,
so thats also a electricity consuming device,
and also a moving part.
AND, ...   possible 5 added non-beneficial aspects:
1) in normal solar hotwater, your water circulating looses its initial 
oxygen ( cooked out),
   its get anaerobic ( read non-corroding) and here they keep blowing 
air in the system
   = oxidation of the glycol+ metal/iron parts.( if they use a classic 
air-lift or geyserpump )
2) then also possible more energy used ( lost) to run the compressor 
then a pump
3) more heat build up in the collectors due to slow pumping ( and very 
without airlifting)
4) bigger pipes needed ( more cost & more heatlosses )
5) air-liquid mix makes for less efficient heat exchange
6)  way way waaaay  to expensive, 9000 $ !? and you even don't get a 
pump for that boatload of cash!?
    a guy on an other forum would have a payback-time of 38 years, if 
that system
    would produce all the heat all year for his sanitary hotwater...

There so called famous  " Geyserpump " is just an old fashioned airlift 
pump with a little add on,
see :  http://www.airliftpump.com/index.htm

JMO
Bruno M.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Op 26-3-2012 15:02, npyner at ihug.com.au schreef:
>  OK, I can't play MOV on this laptop, so what did YOU think?
>
>
>
>     ----- Original Message -----Sent:Fri, 23 Mar 2012 06:38:03 -0400
>     Subject:
>     Re: [Greenbuilding] new solar heating system in this country
>
>
>     I just met one of the owners of this company the other day. One
>     thing I thought interesting about their system is that no electric
>     pump is required to circulate the glycol. Therefore, it still
>     provides hot water even if you loose power (except at night). Any
>     thoughts about their technology from the experts out there? A
>     "geyser" pump?
>
>     http://www.sunnovations.com/content/for-installers
>
>     Thanks,
>
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