New calculation tool 'delivers more' solar gain.

heinbloed

The Classic PVGIS (PVGIS-3) calculation tool is now being replaced by the new tool Climate-SAF PVGIS (PVGIS-CMSAF).

See

http://re.jrc.ec.europa.eu/pvgis/index.htm

explaining the situation at

http://re.jrc.ec.europa.eu/pvgis/PVGIS_new_features.html


Both tools , old and new, are suitable to calculate solar gains for surfaces at various angles and inclinations.

This is important to calculate the thermal energy demand of buildings (heating and cooling load) as well as the heating support of a ST heating system.

In average the solar radiation for Europe is now meassured to be 8% stronger than previously calculated.

Use the interactive map.

Interesting is to compare Dublin City Center in January,during the heating season:
a vertical window (or fascade collector) was previously calculated to receive only 1.29 kWh from the sun per day, using the old software.
The new software gives us 1.7 kWh per day.
That is 32% more than the old folk believed to be there....

Note also the corrected optimum inclinations for solar thermal collectors.


Those who still haven't come to grips with ST space heating in Ireland - be it passive or active heating - should check the base of their calculations.

Joey the lips

Would you mind if i move this to renewables and the mod might consider making it a sticky

heinbloed

Well,the covering of the heating and cooling demand of a structure with correctly specified installations is no issue at the "renewable energy" forum. It would be a specifier's or installer's job, an issue for energy contractors/advisors and civil engineers.
Whilest ST energy can actually deliver up to 40% of the thermal energy demand of a structure anywhere in Europe in a cost effective way (at around € 0.03-0.04 per thermal kWh, cheaper than any other source of thermal energy) the cost effectivness of a heating or cooling system is no issue at the "renewable energy" forum as far as I can see.
For a specifier of a heating or cooling systems an exact cost/benefit analysis is a question of economical survival. Not so for installers who make a living on subsidies, there ecological or economical efficiency is naturally of no issue.

Maybe linking the "plumbing and heating" forum ?

Joey the lips

I am slightly lost in that one but i am grasping a "no" answer to that... Thanks

heinbloed

Sorry, I got lost myself...!
Maybe doublicating the link so it would be still vailable on the "plumbing and heating" forum ?