Generally, there are 2 various types of solar water heating units. The very first is a stand-alone heater that provides all the warm water for your home. The second is used as a pre-heater to warm the water entering into your existing hot water heater. The main distinction in between the two types is that a stand-alone heater will normally have a tank to save the heated water and the pre-heater utilizes the existing water heater as a reservoir.
The part of a solar hot water heater where the water is warmed by the sun is called a heat exchanger. The heat exchanger is the crucial element of the heater and there are many different styles in use around the globe today.
A stand-alone solar hot water heater consists of a storage tank to store the heated water, the heat exchanger, and the hoses or tubing to link them. In some applications, a one-way valve is installed into the system to prevent the backflow of cold water into the tank, and some systems utilize a small pump to accomplish this and make sure circulation through the heat exchanger.
When a system can be established correctly, no pump is needed to accomplish blood circulation through your heat exchanger as the natural convective current will do it totally free (since hot water is lighter than cold water and will tend to rise to the top pulling cold water into the bottom as it does), however, if your specific application is such that the heat exchange unit can not be set on the same level as the tank (due to area for the tank and an appropriate place with readily available sunlight for the heat exchange unit), you might need to use a small pump to make sure blood circulation through your system. For a genuinely off-grid system, you can utilize a little 12-volt pump to power it with a solar panel. No battery is required since the solar heater only works when sunlight is available similar to the photovoltaic panel.
The pre-heater type is tied into the cold water supply line to your existing hot water heater. The way it works is to pre-heat the water coming into your heater so it does not have to work as difficult as normal and often, not. Water that is currently hot does not require as much heating, often none at all. This is a great way to save money on the part of your energy costs that is utilized to supply hot water for your house while leaving your existing hot water heater in the system to guarantee a supply of warm water on cloudy days or other conditions where your solar hot water heater does not work as well.
This kind of solar water heater consists of a heat exchange system, the lines linking it to the cold water supply, and your water heater. A pump is not required here because the pressure of the incoming water will achieve the circulation through the heat exchanger.
These units work particularly well in the summer however provisions should be made to safeguard the outside parts from damage arising from freezing in the winter season. Typically, the heat exchanger and lines going to and from the house are the only outdoors parts and can be drained pipes.
These are the two standard types of solar hot water heater terbaik in use all over the world, today. They can be as simple in style as a garden hose pipe depending on the sun, or as complex as you wish to make it with copper or PVC tubing in a sealed box and temperature-activated one-way valves and pumps. It is up to you to decide on your own.
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