Archive for Over the Gate Join in for a friendly chat over the gate about home and country matters. (Nominated Charity The British Heart Foundation)
 

The free forums are now under new ownership, a full announcement will be made shortly

       Over the Gate Forum Index -> No Footprints
welshboy

Solar Trombe Wall

A trombe wall is a black painted concrete wall of varying thickness from 4 inches to 10 inches . The South side of the wall is covered with glass leaving an air gap of about 3 to 6 inches.

On sunny days the heat travels through the wall at the rate of about one inch per hour.

These are  quotes from the NREL website  (link below) about a study into two buildings.

"Figure 3 shows the thermal distribution of the Zion Trombe wall at 8:30 p.m. on December 16, 2000. The interior surface temperature is generally homogeneous, ranging from 90-96F (32-36C). The wall temperature typically peaks between 8-9 p.m. "  
Comment this wall is 8 inches thick

"The interior surface temperature of the SEB Trombe wall typically peaks at 120-130F (49-54C) at 3:30-4:00 p.m. during the heating season. The interior temperatures of the SEB wall are generally higher, but earlier in the day than the Zion wall."
comment this wall is 4 inches thick hence heat earlier in the day.

This is fine if you have generally clear skies.

In the Uk with so many cloudy days a Trombe wall becomes a heat loss not a heat gain if it is part of the building.

I think the best way to make use of this principle would be to use the trombe wall as a garden wall and take heat into the house or livestock via water pipes embedded in the wall and distributed in either underfloor heating or pipes embedded in an  internal wall.

What do others think ?

Here is the link ( good thermal images)

http://www.nrel.gov/docs/fy04osti/36277.pdf

       Over the Gate Forum Index -> No Footprints
Page 1 of 1
Create your own free forum | Buy a domain to use with your forum