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Passive Solar Heating

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by

Divya Shah

on 13 June 2013

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Transcript of Passive Solar Heating

Passive Solar Heating
Passive Solar Heating
Relies on energy from the sun for generating heat/light

Energy from the sun is free and environmentally safe (excellent alternative to conventional use of fossil fuels)

Sunlight enters the premises through strategically positioned windows or skylights, radiation is absorbed and distributed
Five elements are used in the passive solar heating system: aperture, absorber, thermal mass, distribution and control.

1. APERTURE: A collector facing 30˚ South gathers the sunlight through a large glass window area.

2. ABSORBER: A hard, darkened surface, sits directly in the path of the sunlight and absorbs all the solar heat.
Eco-friendly strategy to heat homes - does not rely on the use of non renewable resources (slows down depletion fossil fuel)
Reducing dependence on fossil fuels = saving fossil fuel for future generations
Freedom from foreign oil dependence and associated price fluctuations
Excellent alternative to conventional heating systems
Advantages Continued...
Advantages of Passive Solar Heating
Effective insulation to supplement a passive solar system reduces monthly energy costs by 46.8 %
All the heat and light generated is free as it is utilizing solar energy
Reduces the energy needed from power companies thus reflecting substantial savings on utility bills
Limitations of Passive Solar Heating
Energy Summative - Divya Shah
Limitations Continued...
Designing a passive solar system into a built home is initially costly
Choosing ideal windows for this system are more costly compared to regular windows (as they filter out less of the sun's energy and are more suitable for passive solar installations)
If a house is not facing the ideal South direction for a location - then an efficient passive solar design may be a very expensive option
Example of a house in North Carolina strategically designed to use the passive solar heating system
Savings
Central heating or air conditioning system no longer needed within home
Extensive space available by eliminating unnecessary equipment e.g. more space without furnace, and higher ceilings due to lack of ductwork
No maintenance - no filters to change, no ducts to clean, no need to buy install or maintain solar panels
No Special Equipment Needed to Install or Maintain
Conservation of Fossil Fuels
Environmental Benefits
Affordable Method of Heating
Completely clean energy source (produces no harmful fumes, pollutants or emissions e.g. nitrogen trioxide, sulphur dioxide, carbon dioxide, etc.)
Does not result in production of greenhouse gases (slows or negates effects of global warming)
Keeps air clean, free of smog and other harmful pollutants as compared to traditional heating methods
More reasonable than active solar systems/standard electrical units
Provides savings from reduced heating unit size, installation, operation and maintenance costs
If incorporated in the initial construction , this system's costs are reasonable
Extensive Remodeling Required
Restricted Location
Heating depends entirely on the climate of an area
Bad weather may leave the home feeling cold/dreary
Prolonged winter storm may rob a home of heat
Climate Dependent - Unreliable
If poorly designed - may produce too much heat/glare in summer and less in winter
Implementing takes planning and strategic design
Restricts directional flexibility e.g. a south facing dwelling is required
Northern climate's harsh winters overwhelm a passive solar system, making other forms of heating a necessity
Installations in colder areas require more (and costly) insulation to keep heat from radiating back out
Upfront Costs
Compromised Appearance and Safety
Requires specialized design (large South facing windows)
Architectural design is limited to include these large open windows
Compromised safety and privacy due to large glass windows
" Passive Solar Energy." Alternative Energy News. N.p., n.d. Web. 26 Mar. 2013. <http://www.alternative-energy-news.info/passive-solar-energy/>.
Leech, Eric J., and Planet Green. "TLC Home "DIY Passive Solar Heat for Your Garage"." TLC "Guides". N.p., n.d. Web. 26 Mar. 2013. <http://tlc.howstuffworks.com/home/solar-garage-furnace.htm>.
" Passive Solar Energy." Alternative Energy News. N.p., n.d. Web. 26 Mar. 2013. <http://www.alternative-energy-news.info/passive-solar-energy/>.
"Passive Solar Design." Passive Solar Design. N.p., n.d. Web. 26 Mar. 2013. <http://passivesolar.sustainablesources.com
"Passive Solar." Index Page. N.p., n.d. Web. 26 Mar. 2013. <http://www.ontarioarchitecture.com/passivesolar
"Passive Solar Energy Pros and Cons." Green Energy - Renewable Energy Blog, Clean Green Power. N.p., n.d. Web. 26 Mar. 2013. <http://cleangreenenergyzone.com/passive-solar-energy-pros-and-cons/>.
Therefore, the Passive Solar Heating System a cost-effective method of providing heating!
How Passive Solar Heating Works
https://www.youtube.com/watch?v=lobSCweC2Nk
4. DISTRIBUTION: The solar heat is distributed throughout the building using three natural heat transfer modes; conduction, convection and radiation

5. CONTROL: Prevents overheating e.g. awnings or thermostat-controlled fans
How Passive Solar Heating Works Continued...
Preferred over active solar devices as it captures sunlight without investments in mechanical and electrical devices

Architects take advantage of Sun's seasonal position when designing buildings
Why Passive Solar Heating?
FUN FACT!!!!!
The use of passive solar heating flourished after World War II.
FUN FACT!!!!!
A passive solar home and conventional home differ in only one simple way - a sophisticated design.
FUN FACT!!!!!
The Ancient Greeks and Romans were the first to use this system in 3rd century B.C.E.
In Markham, this system would prove the most cost-effective strategy for reducing heating and cooling bills irrespective of providing partial or full heating needs
Passive solar buildings in Markham will be more more economical when the lower annual energy and maintenance costs are factored in over the life of the building.
Cost-Effectiveness of Passive Solar Heating in Markham, Canada
Costs little or nothing to operate (when system is implanted in a brand new building)
In the long run will work out cheaper and more environmentally sustaining and eco-friendly in the City of Markham
If incorporated into a new build in Markham: cost will not differ much from building standard property (except materials which absorb sunlight e.g. stone/brick may be more expensive)
Passive Solar Design (PDF 233 KB). (December 2000). DOE/GO102000-0790. Work Performed by the NAHB Research Center, Southface Energy
Chiras, D. The Solar House: Passive Heating and Cooling. Chelsea Green Publishing Company; 2002
Canadian Department of Energy - Energy Efficiency and Renewable Energy - Passive Solar Design". Retrieved 2011-03-27.
Springer, John L. (December 1954). "The 'Big Piece' Way to Build". Popular Science 165 (6): 157.
Chiras, Daniel D.. The solar house: passive heating and cooling. White River Junction, VT: Chelsea Green Pub., 2002. Print
Kachadorian, J. (1997). The Passive Solar House. White River Jct., VT: Chelsea Green Publishing Co.
Works Cited
Websites
Books/Articles
Videos
Full transcript