A Solution to Hotter Summers and Higher Energy Prices - Solar Air Conditioning

Solar air conditioning is defined as a cooling system that gets its energy from solar power. There are several methods for accomplishing this, including passive solar, photovoltaic (PV) solar and solar thermal energy. New advancements in technology are being developed at this time with the support of government initiatives. Air conditioning is a great application for solar energy and could make a huge difference in energy consumption and carbon dioxide production.

Solar airco units using desiccants pass air over the desiccant to allow the moisture to be drawn from the air, making it less humid and more comfortable. Solar energy is used to regenerate the desiccant to dry it out in order to make the process a repeating cycle. The air can be moved using a photovoltaic (PV) solar system to power a fan. Solar energy can also power the motor that moves the desiccant in order to keep the system running optimally.

Passive solar cooling begins with the design of a building. With careful architecture, a building can inhibit heat transfer into a building in the summer and remove excess heat from the building. One example of 'green design' is the use of a cool roofing material to reduce heat transferred into the building through the roof.

Photovoltaic (PV) solar cooling makes use of PV panels to directly convert sunlight into electricity. The limitation of this system is the need for direct sunlight for optimal effectiveness. In order to provide cooling when the sun is under clouds or at night time, you will need to include batteries for electrical storage in your design. You can also remain grid-tied so that you can use electricity from your utility company when the sun is not shining. You may also reap the benefits of running your meter backward when you produce excess energy.

Regardless of which system you use, any attempt to decrease energy consumption could pay off in the long run with decreased utility bills, reduced carbon dioxide emissions, and a clearer conscience concerning your impact on the environment. By designing new buildings with passive cooling techniques in mind, and upgrading old buildings to make them more energy efficient, our use of fossil fuels can decrease significantly.