How Does a DIY Solar Closed Loop Hot Water System Work?

A do it yourself water heater can look like something that is a bit intimidating. However, once you have understood the concept of a closed loop hot water system, you will realize that it is not such a hard thing after all. In fact, even if you don’t have any understanding of how solar systems work you can build a pretty long lasting hot water system with just a few items.

What Is A Closed Loop Hot Water System?

The principles of construction and operation of a hot water system will determine whether it is closed loop or it is open loop. Apart from these two modes of classification, there are many others which we shall not look at in this article.

The main principle of a closed loop hot water system is that it provides anti freezing mechanism throughout the year. Assume a situation where water is heated in one tank and stored in another: what would happen when the water in the tank freezes during the night?

The solution to this challenge is to ensure that instead of heating water, you heat a non-toxic substance that cannot freeze at temperatures that can easily cause water to solidify. The non-toxic substance is heated by the sun, and then it flows to the tank and heats the water inside. It continues the flow, but the water remains static. And therefore no chances of damaging the pipe.

Since this method heats the water indirectly, this method is also referred to as indirect method.

Building One

To construct a closed loop hot water system, you need a collector, a double walled storage tank and non-toxic antifreeze. These items then need to be connected with pipes. One pipe should run from the collector to the space between the double walls of the storage tank. Another one should be placed so as to take back the antifreeze to the collector.

Another pipe should then run from the inside of the storage tank (where water is placed,) to the tap.

The cycle of heating the water will continue throughout the day, and the whole storage tank can stay for quite a long while. Although the use of locally assembled materials will work, it is advisable that use specially built commercial materials so that you are able to build a more efficient system.

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