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Sorption reservoir for heat storage

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Posted by phillip on May 9, 2007, 3:44 am

This appears to be old, but I have not heard any current news
regarding the project.  A German company and research institute had
won an innovation prize for long-term heat storage:


Summer Sun all Winter: Seasonal Heat Reservoir covers heating needs up
to 100 %

A heat reservoir which almost completely bridges the gap between the
overabundance of solar heat in summer and the need for warmth in
winter was awarded the Innovation Prize Berlin/Brandenburg 1999.

The "Sorption Reservoir", an absolutely new invention, was developed
over several years by the UFE SOLAR company in Eberswalde, Germany,
together with the Fraunhofer Institute for Solar Energy Systems (ISE).

Until now, the storage of summer solar energy for heating in winter
was only efficient in large volume: for example, when an entire
neighborhood was heated with a local solar array. In such
installations, water is heated by the sun in summer and stored in
underground tanks for use in winter. Only the great volumes in the
reservoirs allow an efficient ratio of heat storage to heat loss.


A scientific article about the development of the sorption reservoir
can be called up from UFE SOLAR's website under the URL:


The scientific article is no longer available at
http://www.ufesolar.de/ufe1024/f-u-e22.html ,
so I am still uncertain of hte theory behind this.  The  innovation
sounded promising, but seems to have fizzled out.  Has anyone else
heard about?


Posted by Jeff on May 9, 2007, 3:06 pm
phillip@doramail.com wrote:

   I've had some interest in liquid desiccants and there is some info on
this in the group's archives. The energy storeage is related to the
enthalpy of concentrated solution versus that of a dilute desiccant.
This is an order of magnitude or so greater than what can be obtained
with sensible heat storeage. You do need to keep the desiccant from
absorbing moisture from the air. You could call such an energy store an
a*b*sorption store. An a*d*sorption store would entail a gas.

  I'm sure what the German's (the worlds solar leaders at this time) are
doing is far mor sophistcated than what I'm toying with, which is with
calcium chloride (common deicing salt) brine storeage.

   Let us know if you find anything else.



http://www.ufesolar.de/ufe1024/f-u-e22.html ,

Posted by jaall on May 9, 2007, 4:23 pm

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