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

By David Banks

Using the warmth kept within the shallow subsurface for area heating (ground resource warmth) is general in North the USA and plenty of ecu countries, corresponding to Sweden, and is considered crucial and trustworthy 'green' house heating expertise. in lots of countries, together with Britain, the know-how continues to be poorly understood and below used. this example is ready to alter, besides the fact that, with the united kingdom marketplace for floor resource warmth pumps becoming at over a hundred% each year. This publication bargains functional suggestions and should equip engineers, planners and geologists with the basic abilities to evaluate and enforce this new know-how and to introduce them to the technology in the back of thermogeology.

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4 MJ K−1 m−3 . So, from every cubic metre of rock, we can release up to 10 megaJoules (MJ) of energy, simply by dropping its temperature by 4 K. Conversely, we need to put a similar amount of energy back into our cubic metre of rock to raise it temperature by 4 K. The heat energy in the material is ultimately stored as molecular vibrational or kinetic energy; the hotter the material, the faster the molecules of a fluid whiz around, or the molecules of a crystal vibrate. Volumetric heat capacity varies somewhat with temperature, partly (but not wholly) due to changes in density of the material.

When you open the valve on the pressurised gas cylinder, allowing gas to flow to the burner, you are slowly decreasing the pressure in the cylinder. The remaining fluid cools and you may notice drops of condensation on the cylinder. 1, p. 4) that we have already seen that 1 Joule = 1 kg m2 s−2 . 3145 J K−1 mole−1 The Gas Law helps us to predict what happens to a gas when we heat it. If we heat a closed vessel of gas, the volume is fixed and constant. Thus, as the temperature rises, the pressure increases to ensure that the quantity PV/RT remains constant.

2 Conceptual model of a well abstracting groundwater (at a rate Z ) from an unconfined aquifer. The abstracted water also carries a cargo of heat (advection) that can be utilised. Drawdown (s) is defined as the difference between rest water level in the aquifer (RWL) and the groundwater level during pumping. The drawdown in the pumped well (sw ) is the sum of the drawdown in the aquifer and additional drawdown ( s) due to the hydraulic inefficiency of the well. 4 Case study: Gardermoen International Airport.

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