And since this particular form of alternative energy is becoming more and more viable, new and better applications for its technology are now being developed for the future. Though the future for solar energy appears to be clear and better, a lot of people are still speculative about what the future really holds for solar energy. Heat and Solar Energy Solar heating systems incorporate several principles on the conversion of solar energy into solar thermal energy, as well as the physical behavior of heat. The primary principle that people need to know more about include solar home heating, which involves getting solar energy and transforming it into heat. The small part of the power stems through to the earth in the form of sunlight. The rays that deliver the energy of the sun give both heat and power that can effectively be gathered and changed to other types of energy, such as electricity. Solar steam generators use solar power generation use the power of the sun to heat water and create steam to let electrical turbines work. But it wasn t until someone tried to separate the solar heat collector with the water tank that the first prototype for solar hot water heaters was created. Discovery Of Solar Energy Cells Solar energy cells, also known as PV cells, are actually created when three Americans discovered that building transistors with silicon. The operation of solar cells during the mission was considered to be very successful and was duplicated in several American and Soviet satellites. PV has become the established power source by the late 1960s. At Present Today, Germany has become the primary PV market worldwide after they revised the feed-in tariffs for the Renewable Energy Sources Act. Indirect systems use heat transfer fluid. The fluid is heated in solar collectors, then pumped to a storage tank. This is also known as a closed-loop system. The Third Type Active solar pool heating involves the use of pumps to properly circulate the water in the pool via solar collectors to heat and then return to the pool.