Differing Terms and Definitions
Some confusion exists with regard to the terminology of heat pumps and the use of the term "geothermal". "Geothermal" derives from the Greek and means "heat from the Earth" - geologists understand it as describing hot rocks, volcanic activity or heat derived from deep in the earth. Confusion arises when the term "geothermal" is also used to apply to temperatures within the first 100 metres of the surface which closely match the mean annual air temperature at the surface where the sun is the predominant influence on temperature. Below 100 metres (330 ft), geothermal heat, as understood by geologists, begins to become significant as the Geothermal gradient increases by 2°C with each 100 metres (330 ft) of depth.
Read more about this topic: Geothermal Heat Pump
Famous quotes containing the words differing, terms and/or definitions:
“The spirit of the place is a strange thing. Our mechanical age tries to override it. But it does not succeed. In the end the strange, sinister spirit of the place, so diverse and adverse in differing places, will smash our mechanical oneness into smithereens.”
—D.H. (David Herbert)
“The nineteenth century was completely lacking in logic, it had cosmic terms and hopes, and aspirations, and discoveries, and ideals but it had no logic.”
—Gertrude Stein (18741946)
“The loosening, for some people, of rigid role definitions for men and women has shown that dads can be great at calming babiesif they take the time and make the effort to learn how. Its that time and effort that not only teaches the dad how to calm the babies, but also turns him into a parent, just as the time and effort the mother puts into the babies turns her into a parent.”
—Pamela Patrick Novotny (20th century)