This energy source comes from the inner heat of the Earth, especially in the seam lines of the earth’s crust, between the tectonic plates.
The heat is expressed in hot springs or steam produced from deep drilling.
This energy is used in areas with volcanic activity, such as Iceland, Italy, the US West, Japan, Mexico, the Philippines and New Zealand.
In recent years, searches have been conducted in Israel for the discovery of geothermal energy sources.
The searches are located along the Jordan River, especially south of Sodom.
The advantages of this energy source are:
The absence of environmental pollution, the fact that it is a reliable source of energy in those places where it exists, does not require large areas of land (compared with other sources of energy) and the flexibility of using this source because the earth produces heat all the time.
The disadvantages of this energy source are that it can only be used locally in those places where it is discovered.
In addition, the hot water must be returned to the depths of the soil in order to prevent land sinking and a large investment of resources is required in advance of the drilling and the insertion of the pipes, all this before the beginning of regular use.
The economic feasibility of using this energy is determined according to the following parameters:
The location of the site, the depth of the required drilling, the temperature of the water, the pressure of the steam emitted from the ground, the rate at which the water or steam is pumped, the quantity of salts in the water and their composition.