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Types Of Solar Water Heaters

Simplest way to explain a solar water heater would be a hot water heating system that runs on solar energy. The system is developed with numerous solar panels that are connected together, so as to harness the energy of sun. This energy is then further used to heat the water. Most of the time, solar water heaters are not able to run by themselves due to the fact that solar energy is not constant. There are times when the output of the solar panels is not enough to heat the water, and this is when the electric energy kicks in to finish the job. But solar water heaters do save customers a huge amount on energy bills. The only complication would be that installing and maintaining the solar panels turns out to be a lot of hassle for people who would not have time for it. Solar water heaters come in two different types: active and passive solar water heaters.


ACTIVE SOLAR WATER HEATING SYSTEMS
There are two types of active solar water heating systems:

Direct circulation systems
Pumps circulate household water through the collectors and into the home. They work well in climates where it rarely freezes.
Indirect circulation systems
Pumps circulate a non-freezing, heat-transfer fluid through the collectors and a heat exchanger. This heats the water that then flows into the home. They are popular in climates prone to freezing temperatures.

PASSIVE SOLAR WATER HEATING SYSTEMS
Passive solar water heating systems are typically less expensive than active systems, but they're usually not as efficient. However, passive systems can be more reliable and may last longer. There are two basic types of passive systems:

Integral collector-storage passive systems
These work best in areas where temperatures rarely fall below freezing. They also work well in households with significant daytime and evening hot-water needs.
Thermosyphon systems
Water flows through the system when warm water rises as cooler water sinks. The collector must be installed below the storage tank so that warm water will rise into the tank. These systems are reliable, but contractors must pay careful attention to the roof design because of the heavy storage tank. They are usually more expensive than integral collector-storage passive systems.