Are there different types of source-side heat exchangers?
There are two different types of source-side heat exchangers. Open loop or closed loop. Open loop systems extract energy from water wells or a body of water such as a lake or pond. The open loop is very efficient and least costly, but you must have enough flow rate in your well or are close enough to the body of water. The more common source-side system is a closed loop. Closed loop systems can be installed in vertical boreholes, horizontal trenches or submerged in the ocean, lakes, or rivers. Once installed, closed loop systems require almost no maintenance. An environmentally friendly solution (80% water / 20% glycol or alcohol) is circulated through the ground loop. This fluid absorbs energy from the earth and carries it to one or more water source heat pumps. The heat pump, using a simple refrigeration cycle, upgrades the heat and then distributes it throughout the building. In the summer, the system reverses and heat is extracted from the building and expelled into the ground thro
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