Solar Water Heater - WHAT YOU OUGHT TO Know

Solar Water Heater - WHAT YOU OUGHT TO Know Basically, there are two different types of solar water heaters. The first is a standalone heater that provides all the hot water for your home. The second is used as a pre-heater to heat the water coming into your existing water heater. The main difference in the two types is that a stand only heater will usually have got a reservoir to store the heated water and the pre-heater uses the existing hot water heater as a reservoir.

The part of a solar water heater where the water is actually heated by the sun is called a heat exchanger. The heat exchanger is the key element of the heater and there are many different designs in use around the world today.

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A standalone solar hot water heater consists of a storage tank to shop the heated water, the heat exchanger, and the hoses or tubing to connect them. In some applications and one-way valve is installed into the system to prevent the back flow

of cold water into the tank, and some systems use a small pump to accomplish this and assure circulation through heat exchanger.

When a system can be set up properly, no pump is necessary to accomplish circulation through your heat exchanger simply because natural convective current will do it for free (since hot water is lighter than cool water and will tend to rise to the top pulling cold water into the bottom as it does), however, if your particular application is such that the heat exchange unit cannot be set on the same level as the storage tank (due to space for the container and an appropriate place with available sunlight for heat exchange unit), you may have to use a small pump to ensure circulation during your system. For a really off grid program, you can use a small 12-volt pump and strength it with a solar panel. No battery is needed because the solar heater only works when sunlight is available just like the solar panel.

The pre-heater type is tied in to the cold-water supply line to your existing water heater. The way it works is to pre-heat the water getting into your heater so it does not have to work as hard as normal and sometimes, not at all. Water that is already hot does not need as much heating, sometimes none at all. This is a good way to save on the part of your energy bill that's used to provide hot water for your home while leaving your existing hot water heater in the system to make sure a supply of warm water on cloudy days or other conditions where your solar water heater does not work as well.

This type of solar water heater consists of a heat exchange unit, the lines connecting it to the cold-water supply and your hot water heater. A pump is not required here because the pressure of the incoming drinking water will accomplish the circulation through the heat exchanger.

These units work especially well in the summertime but provision should be made to protect the outside parts from damage resulting from freezing in the winter. Usually heat exchanger and outlines going to and from the house are the only outside parts and will be drained.

These are both basic types of solar water heaters in use all over the world, today.

They may be as basic in design as a garden hose lying in the sun, or as complex as you want to make it with copper or PVC tubing in a sealed container and

temperature activated one-way valves and pumps. That is up to you to decide for yourself.

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