29-08-2014, 02:33 PM
Passive Solar Building Design
Passive Solar.pptx (Size: 1.29 MB / Downloads: 58)
Introduction
Passive solar design refers to the use of the sun’s energy for the heating and cooling of living spaces.
These building are also resource efficient and reduces the electric and environmental loads.
Literature
Architect George F. Keck was a pioneering designer of passive solar houses in the 1930s and 40s
Since 1979, Passive Solar Building Design has been a critical element of achieving zero energy
Live examples of the passive solar building
Caspar Point house
3,000-square-foot Caspar Point home
In northern California
completed in 1991
The electricity needs are about 1/10th that of a conventional home
$93 per-square-foot construction cost was $30 less per square foot
A tower house
located four miles inland on a ridge just south of Albion, CA.
The passive solar design concepts used in the Caspar Point house are repeated but adapted to a different setting by orienting the building vertically
Its consideration as a science
The scientific basis for Passive Solar Building Design depends on the combination of:
Climatology,
Thermodynamics
Fluid mechanics
Human
Greenhouses for raising plants.
Key Passive solar building design concepts
Elements to be considered include:
Window placement
Thermal insulation
Thermal mass
Shading
Passive solar heating and their techniques
Two primary elements of passive solar heating are required:
South facing windows
Thermal mass to absorb, store, and distribute heat
Indirect gain system
Indirect gain attempts to control solar radiation reaching an area
Indirect gain system will utilize 30 – 45% of the sun’s energy striking the glass adjoining the thermal mass
Isolated solar gain system
Isolated gain involves utilizing solar energy to passively move heat from or to the living space using a fluid, such as water or air by natural convection or forced convection
Design tools
Useful post-construction evaluation tools has been the use of thermography using digital thermal imaging cameras
Traditionally a heliodor was used to simulate the altitude and azimuth of the sun shining
Energy saving and power generation
Solar strategies added only minor costs to this custom home but resulted in substantial energy cost savings over the life of the building.
Free solar space heating and cooling, insulation and water heating account for over 50% of energy savings
Level of applications
Pragmatic
Annualized
Minimum machinery
Zero Energy Building