Water To Earth
An alternative to the earth-to-air heat exchanger is the "water" to earth heat exchanger. This is typically similar to a geothermal heat pump tubing embedded horizontally in the soil (or could be a vertical sonde) to a similar depth of the earth-air heat exchanger. It uses approximately double the length of pipe of 35 mm diameter, e.g., around 80 m compared to an EAHX of 40 m. A heat exchanger coil is placed before the air inlet of the heat recovery ventilator. Typically a brine liquid (heavily salted water) is used as the heat exchanger fluid.
Many European installations are now using this setup due to the ease of installation. No fall or drainage point is required and it is safe because of the reduced risk from mold.
Read more about this topic: Ground-coupled Heat Exchanger
Famous quotes containing the words water and/or earth:
“The night was thick and hazy
When the “Piccadilly Daisy”
Carried down the crew and captain in the sea;
And I think the water downed ‘em;
For they never, never found ‘em,
And I know they didn’t come ashore with me.”
—Charles Edward Carryl (1841–1920)
“Let us hope ... that by the best cultivation of the physical world, beneath and around us; and the intellectual and moral world within us, we shall secure an individual, social and political prosperity and happiness, whose course shall be onward and upward, and which, while the earth endures, shall not pass away.”
—Abraham Lincoln (1809–1865)