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The solar water heater is an equipment that collects solar energy in order to provide hot water in a home. It is an ecological, sustainable and economical solution allowing access to hot water. Find more articles on the theme: Work quotes for a water heater installation
Solar water heaters: the different types
The monobloc thermosyphon water heater Also called "coil", this water heater often consists of a network of copper pipes trapped in an isolated frame, which is responsible for heating the water, thanks to the sun's rays. Hot water is naturally lighter than cold water. The latter will therefore remain in the lower part of the appliance, while the heated water will move upwards. A circular flow is set up, so that all the water can be heated. The thermosyphon system has the advantage of being inexpensive. It is also solid. The thermosyphon separate element water heater The principle of this solar water heater is identical to the monobloc model, but the collectors are separated from the tank. The latter must be placed at least 50 cm above the sensors. The balloon also needs to be installed indoors and covered, for example under a roof. The forced circulation and separate element water heater The collectors are separate from the tank, and can for example be installed on the roof, while the tank is inside, as close as possible to the tapping points. The system has a regulation that controls the circulation of water, depending on the temperature of the tank and the sensors.
Solar water heater: the elements of composition
A solar water heater is made up of several elements with specific functions. - Collectors: most often installed on the roof, their function is to collect the sun's rays. The surface of the collectors gives you an idea of the quantity of hot water that the water heater can produce. - The heat transfer liquid: it is a solution made up of water and antifreeze, which circulates the heat obtained, towards the balloon, passing through the tubes of the sensors. - The heat exchanger: it transfers heat to the water stored in the tank. The primary circuit fluid again joins the sensors to heat up again. - The tank: it stores hot water. Its volume is chosen according to the needs of the family.
The advantages of solar water heaters
- The solar water heater produces no greenhouse gases, which contributes to environmental protection. - It uses a renewable and available source of energy. - The lifespan of a solar water heater is approximately 20 years: it is therefore greater than that of an electric cumulus. - If this type of water heater does not cover 100% of the needs of a home, it will take only a tiny additional electrical power to top up. The solar water heater therefore considerably reduces your electricity bill.