Solar Thermal Collectors
Heating With the Sun's Energy
Solar thermal (heat) energy is often used for heating water used in homes and swimming pools and for heating the insides of buildings ("space heating"). Solar space heating systems can be classified as passive or active.
Passive space heating is what happens to your car on a hot summer day. The sun's rays heat up the inside of your car. In buildings, the air is circulated past a solar heat surface and through the building by convection (meaning that less dense warm air tends to rise while denser cool air moves downward). No mechanical equipment is needed for passive solar heating.
Active heating systems require a collector to absorb and collect solar radiation. Fans or pumps are used to circulate the heated air or heat absorbing fluid. Active systems often include some type of energy storage system.
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Where Solar is Found
Solar energy is by far the Earth's most available energy source. Solar power is capable of providing many times the total current energy demand. But it is an intermittent energy source, meaning that it is not available at all times. However, it can be supplemented by thermal energy storage or another energy source, such as natural gas or hydropower.
Solar Basics
Energy from the Sun
The sun has produced energy for billions of years. Solar energy is the sun
Solar Water Heater Cost
The Sun, just another star in the Milky Way, is an indispensable part of the solar system supporting all the life forms on Earth from a distance of about 150 million kilometers. Owing to the magnanimity of its light and heat, the Sun serves as a wonderful source of energy. Being able to harness its energy free of cost, is perhaps one of the greatest things we Earthlings are blessed with.
Super Solar Flares: Armageddon from the Sun?
Most people know what a solar flare is, but few know about a very rare and yet very powerful type of solar flare - a "super solar flare." A super solar flare is about as powerful as the nuclear electromagnetic pulse (NEMP) that occurs when a nuclear device that is detonated. A super solar flare or an NEMP could seriously set the world back many, many years as far as technology is concerned. Our earth's atmosphere protects us and our equipment from regular solar flares, but can be easily penetrated by a super solar flare. Which could damage everything from our modern electronics to the power grid.
Solar Energy & the Environment
Using solar energy produces no air or water pollution and no greenhouse gases, but does have some indirect impacts on the environment. For example, there are some toxic materials and chemicals, and various solvents and alcohols that are used in the manufacturing process of photovoltaic cells (PV), which convert sunlight into electricity. Small amounts of these waste materials are produced.
Solar Energy Products for Homes
Solar energy has been used by humans and every other living being since its inception. Solar energy is the heat and light from the Sun. The Earth receives 174 petawatts (PW) of solar radiation at the upper atmosphere and of that 70% is absorbed by clouds, oceans and land masses. Energy from the Sun is harnessed in two ways; Heat and Light energy.
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