Some sunlight that hits the earth is reflected. Some becomes hot. in VS .NET

Generate DataMatrix in VS .NET Some sunlight that hits the earth is reflected. Some becomes hot.

Some sunlight that hits the earth is reflected. Some becomes hot.
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ATMOSPHERE CO2 and other gases in the atmosphere trap heat, keeping the earth warm.
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FIGURE 5-5 Global warming
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FIGURE 5-6 Greenhouse
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FIGURE 5-7 Passive solar in a home
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sun, which will affect how much light and energy passively enters into the home. Your next consideration is the orientation of the home, which is also related to the climate and the solar altitude (Figure 5-9). These factors must be addressed by your architect before the building design begins. A passive solar home has five elements (Figure 5-10): a thermal mass to reflect light and collect heat during the day; an absorbing material to hold and store the heat; an aperture or opening to allow the light energy to enter the home; a control to vary the amount sunlight that is passed;
Five
June 21 (summer solstice) March 21, September 21 (equinox) 23.5 deg
December 21 (winter solstice)
23.5 deg
47 deg
90 deg local latitude
FIGURE 5-8 Solar altitude
http://en.wikipedia.org/wiki/File:Solar_altitude.svg
FIGURE 5-9 Passive solar home orientation
http://dnr.louisiana.gov/sec/execdiv/TECHASMT/ecep/comfort/c/com-c2.gif
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Summer sun
Winter sun Control
Distribution
Absorber Aperture Thermal mass
FIGURE 5-10 Five elements of a passive solar home
http://www.energysavers.gov/images/five_elements_passive.gif
and a method for distributing energy during the evening. These elements must be present and designed correctly for passive solar to function without intervention or mechanical assistance. With proper home maintenance, passive solar elements will last indefinitely no furnace to replace every 20 years, no electricity required, no motors to wear out, and no noise, smell, or toxic chemicals involved. Passive solar is clean, simple, efficient, and free. The same process can be achieved in the vertical (Figure 5-11) using a Trombe wall, named after French engineer F lix Trombe, who popularized its use in the 1960s. These are the basics of designing a passive solar home. You can then design the appearance of the home with your architect, the same as any other home. The details in passive solar energy are in the design and proper implementation. Understanding the concept and knowing the five components of passive solar should help you understand and use passive solar in your home design.
If you would like assistance or more detail on passive solar design, you can e-mail me at Solar@exploresynergy.org.
Five
Summer sun
Winter sun
FIGURE 5-11 Vertical thermal mass
http://www.epa.gov/ne/eco/energy/images/trombe-wall.jpg
Passive Solar Home Modifications
There is a happy medium between designing and building a brand new home and merely opening the blinds to let the sun into your current home. You can build a passive solar addition to your residence, such as a sunroom (Figure 5-12) a simple and effective way to harness the sun s energy. Many sunroom plans and kits can be purchased and installed. Figure 5-13 shows all five of the components of passive solar in a single room addition. This type of home addition is a relatively low-cost option. The price of a new home may begin at $200,000, but a passive solar addition can cost only a few thousand dollars. Another option is to modify an existing room in your home to make it more solar friendly. Your home is probably built in a square or rectangular format, and one or more sides of your home will likely have some sun exposure. Add a thermal mass floor or wall and some properly placed windows, and you can create a room that most people will envy a warm, quiet, sunny place to sit during a cold winter day. This type of home modification can often be accomplished without disruption to the rest of the home, and at a relatively low cost.
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FIGURE 5-12 Sunroom
http://resourcecenter.pnl.gov/cocoon/morf/ResourceCenter/dbimages/full/ 972.jpg
Good Solar Design
Light and thermal energy are gained in a solar home or room through radiation. The transfer of that energy takes the form of convection. A properly designed space must allow the correct amount of light in and control the amount of energy dissipated. Insulation allows for the containment of energy taken in. Radiation absorption can be increased passively with color. The albedo of an object refers to how strongly it reflects light (Figure 5-14). For example, a white surface will reflect sunlight almost nine times more than a black surface. This means that your thermal mass, the area that stores heat energy, should be dark in color. A light-colored floor or wall may rise in temperature to 80 or 90 F, but a dark-color thermal mass can rise in temperature to 130 or 140 F.
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