A solar heater is a device that uses heat from the sun to heat a substance, such as water, oil, brine, glycol or air.
most common use is to heat water for use in pools or toilet facilities (showers, washing clothes or dishes etc.) Both in domestic as hotels. They are simple and robust, can have a lifespan of 20 years without much maintenance.
recommend cleaning the collector every 4 to 6 months to increase their efficiency and lifespan. Depending on the technology and materials in place, a solar heater can reach have efficiencies of 70% or 80%.
This efficiency is very high compared with the solar panel which generates electricity but with an efficiency of up to 15%. Domestic solar water heaters can work together with common water heaters, or completely replaced, either for reasons of fuel or electricity savings, or lack thereof.
In many climates a solar heater can reduce energy consumption used to heat water. This decrease can be up to 50% -75%. Although in many countries, usually developing a very favorable climate for the use of these systems, not used because the initial cost that it should be covered to warm the first drop of water. Work with the same kind of energy that solar concentrators, but use a different system.
Source: Green Blog A
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