An introduction to thermogeology: ground source heating and - download pdf or read online

By David Banks

ISBN-10: 1405170611

ISBN-13: 9781405170611

Using the warmth kept within the shallow subsurface for area heating (ground resource warmth) is normal in North the US and plenty of ecu countries, equivalent to Sweden, and is considered crucial and trustworthy 'green' area heating know-how. in lots of countries, together with Britain, the expertise is still poorly understood and less than used. this example is set to alter, besides the fact that, with the united kingdom marketplace for floor resource warmth pumps becoming at over a hundred% every year. This e-book bargains sensible assistance and may equip engineers, planners and geologists with the elemental talents to evaluate and enforce this new expertise and to introduce them to the technology in the back of thermogeology.

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Sample text

Thus, the shortwave insolation at the earth’s surface (qsw ) will be somewhat less (around half, as a global average) than that outside the atmosphere. In fact, Connelly (2005) estimates annual mean insolation rates of around 300 W m−2 in tropical regions, around 200 W m−2 in temperate zones, and as little as 100 W m−2 in northern Eurasia and North America. 2). Only a relatively small proportion (<6%) of the incoming short-wave radiation is harvested by plants to drive photosynthesis (Linacre and Geerts, 1997).

5 Schematic cross section through a groundwater system. Recharge falling on the limestone aquifer outcrop slowly flows down-dip, equilibrating with progressively higher temperatures with increasing depth. Small quantities of water are able to exit the aquifer system via a ‘short-circuiting’ fault. The ascent along a high permeability fault may be so rapid that the water does not substantially cool during its re-ascent, emerging as a warm spring. The grey shaded strata are water-saturated limestone.

190) shows the same effect for a solution of ethylene glycol antifreeze. We should remember that heat may also be stored or released from a substance due, not just to change in temperature, but to change in phase. 2). 1 The temperature dependence of the thermal properties of water. In this diagram, SC and SVC are the specific heat capacity and volumetric specific heat capacity, while λ is the thermal conductivity. Values on the graph are derived or calculated from data provided by Eskilson et al.

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An introduction to thermogeology: ground source heating and cooling by David Banks


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