In the reservoir, the fluid filled cavities or pores of the rock. Most of the pores filled by water

Calculating the electric potential of a geothermal source or geothermal sources in the early stages of the survey is that tricky. up great Easy because it calculated is actually quite simple. Difficult because quite a lot of unknown parameters so that its value must be estimated based on available up great data or assumed under the common prevailing in the world geothermal up great and often require expert up great judgment.
Common method used to estimate the electrical potential up great of a geothermal resource in the early stage of the survey is the volumetric calculation method. Basically, this method of calculating the energy contained in the reservoir or heat in place. This energy is the sum of the energy contained in the rock and the energy contained in the fluid reservoir.
Rock mass is affected by porosity. Porous up great rock that will have a lighter weight while the rocks with little pores tend to be more massive. Because it is not 100% of the rock volume occupied by the matrix up great rock, the rock mass per unit volume of rock is the product of (1-fraction porosity) multiplied by the density (density) of rocks. Rock with a porosity of 8% means having pore fraction at 12:08.
The fluid in the reservoir up great could be in a phase mixture of steam and water. So that the fluid mass is the sum of the mass and the mass of water vapor. If half the fraction of the existing fluid is steam, then half again of course is the fraction of water, so that the sum of the two fractions is always 1 or 100%. Therefore, up great the fluid energy consists of the energy fraction of water vapor and energy fraction. So it can be said:
In the reservoir, the fluid filled cavities or pores of the rock. Most of the pores filled by water and partly filled by steam. So that the mass of each fluid per unit volume of rock is the product of the fraction of porosity to the density and the fraction of each of the fluid. Fraction of each fluid is known as saturation. If the saturation vapor is half, then surely half the water saturation, so that the sum of the two is always 1 or 100%. Can be written, for a unit volume of rock:
The value of the density and 'energy-in' either for steam or water is a function of the temperature of the reservoir. When the temperature of the reservoir is known, up great then these values can be read in the steam tables.
Energy that can be processed into electricity is the energy difference between the initial state and the final state energy. Age geothermal projects usually projected at least 30 years, so the final state is calculated during the first 30 years after production begins. However, not necessarily all the excess energy can be extracted, up great only a certain percentage that could be obtained, the percentage is known as factor cost (recovery factor). In general, the acquisition up great of no more than 50%.
Having obtained the recoverable energy power can be calculated, ie the recoverable energy divided by the projected life of the project, the power is still in units of thermal power. To gain power, the thermal power must be multiplied by a conversion factor of electricity, this factor up great is usually around 10-12%. up great
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