1. Solar thermal energy

2. Solar thermal energy Is a Technology for harnessing solar energy for thermal energy Solar thermal collectors are classified by the USA Energy information Administration as low-, medium-, or high- temperature collectors. Low temperature collectors are flat plates generally used to heat Swimming pools.

3. Of the 21,000,000 square feet (2,000,000 m2) of solar thermal collectors produced in the United States in 2006, 16,000,000 square feet (1,500,000 m2) were of the low-temperature variety. Low- temperature collectors are generally installed to heat swimming pools, although they can also be used for space heating. Collectors can use air or water as the medium to transfer the heat to their destination.

4. Thermal mass materials store solar energy during the day and release this energy during cooler periods. Common thermal mass materials include stone, concrete, and water. The proportion and placement of thermal mass should consider several factors such as climate, day lighting, and shading conditions

5. Evaporation ponds are shallow ponds that concentrate dissolved solids through evaporation. The use of evaporation ponds to obtain salt from sea water is one of the oldest applications of solar energy.

6. Solar stills can be used to make drinking water in areas where clean water is not common. Solar distillation is necessary in these situations to provide people with purified water. Solar energy heats up the water in the still. The water then evaporates and condenses on the bottom of the covering glass