By David Banks
Using the warmth kept within the shallow subsurface for house heating (ground resource warmth) is prevalent in North the USA and lots of eu international locations, similar to Sweden, and is thought of as an important and trustworthy 'green' area heating know-how. in lots of international locations, together with Britain, the expertise continues to be poorly understood and lower than used. this example is set to alter, although, with the united kingdom marketplace for floor resource warmth pumps transforming into at over a hundred% every year. This ebook bargains sensible advice and may equip engineers, planners and geologists with the basic abilities to evaluate and enforce this new know-how and to introduce them to the technology at the back of thermogeology.
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Additional resources for An introduction to thermogeology: ground source heating and cooling
This decreasing density causes that region of air to become more buoyant than the surrounding air and to rise: the beginning of free convection. ). difference. 35, but sometimes reaching as high as 2 in boiling liquids. 5 (p. 14), we have already considered the huge convection cells of ﬂuid mantle rock that are related to global plate tectonic processes and continental movements. In the applied science of thermogeology, however, it is not this type of subsurface convection that interests us. Rather, we need to know about the forced convection (advection) of heat that occurs with groundwater ﬂow.
Sh farming). Heat pumps (Chapter 3) may or may not be employed to deliver heating to these uses. 10), to a delivery ﬂuid, whose chemical composition is controlled. In this way, problems with chemical incrustation or corrosion are limited to the heat exchanger and will not affect the remainder of the heating circuit. 11 Cascading use Of course, in reality, the energy of many geothermal systems is not extracted by only one means of exploitation, but by several successive ‘cascading’ applications.
Finally, when considering the issue of sustainability, we would do well to remember timescale. e. a set of geographically and hydrogeologically related extraction and injection wells) may turn out to have a ﬁnite lifetime of decades or centuries, the earth’s tectonic and heat ﬂow processes have a timescale of millions of years. If we have to abandon a geothermal ﬁeld after 100 years, the ultimate heat source (geothermal heat ﬂux and magmatism associated with plate tectonics) remains. e. typically decades to centuries; Rybach, 2003a).
An introduction to thermogeology: ground source heating and cooling by David Banks