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Passive Solar Energy By: David Jung Objective What is Passive Solar Energy and how does it work? 5 Basic Solar Design Principles Advantages Disadvantages What is Passive Solar Energy Passive Solar Energy is the use of solar energy to heat a home with little or no mechanical assistance.

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Presentation Transcript
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Passive Solar Energy

By: David Jung


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Objective

  • What is Passive Solar Energy and how does it work?

  • 5 Basic Solar Design Principles

  • Advantages

  • Disadvantages


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What is Passive Solar Energy

  • Passive Solar Energy is the use of solar energy to heat a home with little or no mechanical assistance.

  • Homes constructed with solar design elements, capture sunlight and utilizes the natural movement of heat and air to maintain comfortable temperatures.


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5 Basic Solar Design Principles

Orientation

  • Longer axis of home parallel to east/west direction

  • Longer dimension of house faces south

    Overhangs and Shading

  • Properly sized overhangs provide shading when cooling is needed and allows sunlight in when heating is needed

  • Other methods of shading: insulated drapes or shutters, exterior shades, awnings, and landscaping

    Insulation

  • To ensure that a comfortable temperature is maintained within the house

    Windows

  • Optimum position for maximum solar benefits is true south

  • Position majority of windows on the south-facing wall to collect warm solar energy and to let in fresh air

  • Limit north/east/west windows to keep house well insulated

    Thermal Mass

  • A solid or liquid material that absorbs and stores warmth or coolness until it is needed later on

  • To prevent large changes in indoor temperatures as outdoor temp. rises and falls, balance the amount of square footage of south-facing glass to the amount of effective thermal masses


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Advantages

  • Environmentally-Friendly

  • Attractive living environment: large windows/views, open floor plans, and sunny interiors

  • Lower energy bills, year-round

  • High owner satisfaction, increases re-sale value of the house


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Disadvantages

  • Without help of experienced passive solar designer, building a home that utilizes passive solar energy can be very difficult

  • A small mistake can be costly

  • Unwanted heat during the summer increases energy use in the building due to added load on the A/C


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References

  • http://www.eere.energy.gov/de/passive_solar_design.html

  • http://www.nmsea.org/Passive_Solar/Passive_Solar_Design.htm

  • http://www.consumerenergycenter.org/homeandwork/homes/construction/solardesign.html


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