Water to Water Heat Exchangers

Heat exchangers are used to transfer heat from one fluid to another through a separating wall. Classification is according to the process of heat transfer, mechanical construction and principal material of construction. There are also several types of systems used in the heat transfer as well as the fluid utilized therein. The most common among solar water heating systems are water to water heat exchangers and air-to-water also known as air-to-liquid.

The former type uses a heat-transfer fluid in the form of water that then circulates through the solar collector after absorbing the heat then flows through the heat exchanger then transfers its heat to water in a storage tank. The fluids like that of antifreeze help protect the solar collector from freezing especially in extreme weather or simply cold weather.   

Water to water heat exchangers have at least one or two barriers between the fluid and the domestic power supply. The barriers are also known as single-wall and double-wall barriers.

The former is a pipe or tube that is usually surrounded by a fluid. The brazed heat exchanger is the most advanced form of the compact plate heat exchanger especially designed for a wide range of applications in both process and hydronic applications.

These devices are also widely used for refrigeration applications as evaporators, condensers and sub-coolers. Another form is the tube and shell heaters as it provides a simple method of heating swimming pool water indirectly from a central heating boiler. The latter has a number of parallel tubes enclosed in a relatively close fitting cylindrical shell.  

Water to water heat exchangers will enable every household owner to heat pools, hot tubs, spas, stay hot in a cold weather or even melt the snow in the driveway! They are so convenient to use and helps lower down the energy consumption with just a single device doing all the heating work!

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