|PASSIVE SOLAR ENERGY
"The common features of passive solar architecture
are orientation relative to the Sun, compact proportion (a low surface
area to volume ratio), selective shading (overhangs) and thermal mass."
THERMAL MASS, WALL OR HEAT SINK or TROMBE
"The adobe wall, stone wall and the dyed
concrete slab are my thermal mass and will absorb solar radiation on sunny
days in the winter and release their heat durning the nighttime hours.
Thermal mass acts to control temperature swings from night to day. Conventional
construction without the attention to passive solar design can over-heat
durning the summer days and require mechanical cooling and cool down during
the night in the winter requiring mechanical heating. Larger roof overhangs
will block the sun from entering the house during the summer when the sun
is high in the sky but allows it to enter the windows and warm the thermal
mass when the sun's angle is low in the winter time. Obviously, good insulation
is a paramount component to good passive solar design."
Adobe Walls and Thermal Mass Walls
The solar pit at left has barrels of water
that act like a trombe to release heat at night. Insulating batts
further prevent heat loss at night.