Tom Willey, left, and Jim Gerritsen converse in the Esalen garden in Big Sur, Calif.
Peter DaSilva for The New York Times

nytimes.com - by Carol Pogash - January 24, 2014

BIG SUR, Calif. — Among the sleek guests who meditate and do Downward Facing Dog here at the Esalen Institute, the farmers appeared to be out of place. . .

. . . For nearly a week, two dozen organic farmers from the United States and Canada shared decades’ worth of stories, secrets and anxieties, and during breaks they shared the clothing-optional baths.

The agrarian elders, as they were called, were invited to Esalen because the organizers of the event wanted to document what these rock stars of the sustainable food movement knew and to discuss an overriding concern: How will they be able to retire and how will they pass their knowledge to the next generation?

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bge.apogee.net

An open-loop, ground-water heat pump, uses a surface or underground water source (such as a lake, river, or well) as the heat source and sink. Well water designs are the most common and seem to be the most cost effective. The well supplies both domestic water and water for the heat pump. Approximately three gallons per minute of well water are needed per ton of cooling capacity.

Ground water source open-loop heat pumps use the same concept as the ground coupled units - for example, in the Midwest the temperature of the earth near the surface and the water in it (aquifer) is typically around 55°F. Water is taken from the ground or surface water (pond, lake, etc.), circulated to the individual heat pumps and the returned to the ground via a disposal well, returned to the lake or pond, or where permitted discharged into a stream or river.

When more units are heating than cooling the circulating water temperature drops prior to disposal. Conversely, when more units are cooling than heating, the circulating water is warmed prior to disposal.

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