Convection

• Flow due to density
• wind, plates moving, ocean currents
• closed system = warms to stillness
• see youtube

Radiation

• electro magnetic spectrum
• energy moves through space
• objects heat
• gas heated by objects

passive solar

• collecting radiant energy
• south windows
• storage = thermal mass, high heat capacity
• convection currents allow flow of heat
• inexpensive

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Active Solar

• pumps or fans to circulate fluid or air
• air = collector + ducts to room/storage
• fluid = collector + liquid to room/storage
• more expensive
• payback can be longterm

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Resources

• National Institute of Building Sciences
• Encyclopedia of Alternative Energy and Sustainable living

Cue