Peterws
Member
I am considering building a few Trombe walls in my house.
I have large windows facing north with deep reveals and I was thinking of making some 900 high nib walls filled with water (see details)
So in my living room I would have 3 off 1200w x 900h trombe walls - how much energy could I expect to capture on a sunny canberra day?
dymonite69
Member
Technically. this isn't a Trombe wall because the mass is actually located within the living space. It probably will work better because the overall structure is insulated.
dymonite69
Member
Benny said:
Figures I have for Perth say N facing, vertical, window/wall receives 4.14kWh/sqm/day in winter. Aust solar radiation data handbook.1995
That's really interesting. BOM says that Perth winter insolation for a horizontal surface is 9.7MJ/m2/day.
Presumably due to Lambert's cosine law (and total internal reflection) this means that 1m2 of vertical north facing window is only able to admit less than 50% of the available solar insolation.
Another misquote from the passive solar literature is that a north facing window admits 1000W/m2 i.e. one bar radiator. Checking the weather data suggests it more likely to be half of this during winter.
Peterws
Member
so.......3 off Trombe walls @ 1 sqm each could contribute as much as 70 kW/day ......mind you if the last week is anything to go by - we haven't seen much of the sun!!
I thought if I fill a few Jerry cans with water, paint one side black and see what it does before I go to the trouble of building the walls
I have access button data loggers (work) so I can monitor the performance.
I will post the data for those interested.
