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what are the two types of solar energy?
Is the solar energy and energy of people and animal the same or different?
what is the difference between active and passive energy systems.
Both the active and passive solar systems offers good alternatives it depends on individual.
Is wind turbine active or passive solar systems?
Solar power is one of very few sources of energy that are completely free.
There are two basic forms of radiant solar energy use:
passive solar energy systems and
active solar energy systems.
Passive solar energy systems are static, and do not require the input of energy in the form of moving parts or pumping _fluids to utilize the sun's energy.
Buildings can be designed to capture and collect the sun's energy directly. Materials are selected for their special characteristics: glass allows the sun to enter the building to provide light and heat; water and stone materials have high heat capacities. They can absorb large amounts of solar energy during the day, which can then be used during the night.
A southern exposure greenhouse with glass windows and a concrete floor is an example of a passive solar heating system.
Active solar energy systems require the input of some energy to drive mechanical devices (e.g., solar panels), which collect the energy and pump fluids used to store and distribute the energy.
Solar panels are generally mounted on a south or west-facing roof. A solar panel usually consists of a glass-faced, sealed, insulated box with a black matte interior finish. Inside are coils full of a heat-collecting liquid medium (usually water, sometimes augmented by antifreeze).
The sun heats the water in the coils, which is pumped to coils in a heat transfer tank containing water. The water in the tank is heated and then either stored or pumped through the building to heat rooms or supply hot water to taps in the building.
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