THE ADVANTAGES OF A SOLAR WATER HEATER

THE ADVANTAGES OF A SOLAR WATER HEATER
The types of solar water heaters
Solar water heaters can be active or passive types. The active system uses an electric pump for circulating fluid through the collector; passive system has no pump and relies only on the circulation through the convective flow.

Passive System
Passive systems move the finished water or coolant through the system without pumps. Passive systems less expensive than active systems, but also less effective because of slow circulation in the system.

Active Systems
Active systems use electric pumps, valves and controllers, circulating coolant through the collector. They are usually more expensive than passive systems, but also more effective.

Active systems with an open circuit
Active system with an open circuit using pumps for water circulation through the collectors. Active system with an open circuit is popular in regions with positive temperature or in seasonal use. Can be used when the air temperature -20 ° C or -25 ° C.

Active systems with closed circuit
In these systems, heat collector is usually a water-glikolievy antifreeze. Heat exchangers transfer heat from the primary coolant to water that stock in the tanks. Systems with closed circuit popular in areas affected by the duration of the negative temperatures, since they are well protected from freezing.

For heating 100 liters of water solar equipment must have a 2-3 m2 of solar collectors. This installation of boilers in the summer will provide daily water heating to a temperature of at least 450S with a probability of at least 70-80%.

As with energy, and in economic terms for the creation of domestic solar water heaters to use simple solar collectors with a transparent fence.

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