Passive Solar Design for New Mexico
Review of previous classes
- Diurnal Heat Capacity
- Embodied energy of materials:
- Concrete: ~3 kwh/lbm. 50 ft x 20 ft concrete house, 12"
thick, 8 ft high walls and 12 " slab. Volume of concrete would be
equal to the surface area (floor and walls) = 1000 + 140 x 8 = 2120 ft3.
At 150 lbm/ft3, this is 318,000 lbm, or 954,000 kwh. This is
equal to 3255 MMBtu: 100 years worth of energy!
- Typical buildings: ~1 GJ/ft2, Assume 1000 ft2;
1000 GJ emodied energy. This is about 948 MMBtu. About thirty years
worth of heating energy!
- Low Energy Materials: Close to the Earth
- High Energy Materials: Need large amounts of processing, transport.
- Evaluating Building performance
- Oversizing Philosophy
Types of passive solar buildings:
- Direct Gain
- Attached Greenhouses
- Indirect Gain
- Trombe walls
- Water walls
- Convective walls
- Roof Ponds