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Solar heating and cooling

PostPosted: Wed Nov 04, 2015 8:49 am
by Volcano
Hi All,Is there,Solar heating and cooling systems. (not reverse cycle air con), or heat pumps.Would like to heat and cool 20x8 meter hall Ulladulla area NSW. Many thanks ( hope I'm in the right area.)

Re: Solar heating and cooling

PostPosted: Wed Nov 04, 2015 10:16 am
by Gordon-Loomberah
Solar hydronic heating works well. Evacuated tube array on the roof or ground mounted near the building with a large insulated water storage tank, the hot water is circulated through convection units ("radiators") indoors, with fans to spread the heat around the building. They will obviously only heat, not cool.

RCACs can be solar powered and are a very efficient use of solar power, as with large systems you can do the heating and cooling work of up to nearly 4 times the PV array rating. Smaller systems have coefficients of performance of 5-7, so multiple smaller units would be more effective than one large unit.

However, if the hall is not well insulated, you would be largely wasting your time- insulate first!

Re: Solar heating and cooling

PostPosted: Wed Nov 04, 2015 12:19 pm
by davidg
Gordon-Loomberah wrote:insulate first!

+1, always.

Re: Solar heating and cooling

PostPosted: Wed Nov 04, 2015 6:09 pm
by Tracker
Gordon-Loomberah wrote:Solar hydronic heating works well. Evacuated tube array on the roof or ground mounted ......
RCACs can be solar powered and are a very efficient use of solar power,


Plus 10..

Only Hydronic heating is PRACTICAL..

It is POSSIBLE to have Hydronic Cooling, but I doubt there has ever been one commercialised.. (except by NASSA

eg Remember the old Silent Night Refrigerators running on Kero..
..
.