Geothermal Heating System

An example of a geothermal application with a heat exchanger is the geothermal heating system sketched in Figure 5-11. The heat exchanger is shown at the top of the figure and the geothermal reservoir is shown at the base of the figure.

A geothermal reservoir is an aquifer with hot water or steam. The production well is used to withdraw hot water from the geothermal reservoir and the injection well is used to recycle the water. Recycling helps maintain reservoir pressure. If the geothermal reservoir is relatively small, the recycled, cooler water can lower the temperature of the aquifer. The electric pump in the figure is needed to help

Heat exchanger and auxiliary boiler

Heat exchanger and auxiliary boiler

Figure 5-11. Geothermal Heating System

Geothermal Reservoir

Figure 5-11. Geothermal Heating System withdraw water because the reservoir pressure in this case is not high enough to push the water to the surface. Heat from the geothermal reservoir passes through a heat exchanger and is routed to a distribution network.

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