Geothermal Power PlantsIn places wh

Geothermal Power Plants
In places where the geothermal
reservoirs are less than several kilometers deep, wells can be
drilled to reach them. The hot water and steam produced by
geothermal energy then can be used by geothermal power
plants, like the one in Figure 21, to generate electricity.
Most geothermal reservoirs contain hot water under high
pressure. Figure 22 shows how these reservoirs can be used to
generate electricity.While geothermal power is an inexhaustible
source of energy, geothermal power plants can be built only in
regions where geothermal reservoirs are close to the surface,
such as in the western United States.

Heat Pumps
Geothermal heat helps keep the temperature of
the ground at a depth of several meters at a nearly constant temperature
of about 10° to 20°C. This constant temperature can be
used to cool and heat buildings by using a heat pump.
A heat pump contains a water-filled loop of pipe that is
buried to a depth where the temperature is nearly constant. In
summer the air is warmer than this underground temperature.
Warm water from the building is pumped through the pipe
down into the ground. The water cools and then is pumped
back to the house where it absorbs more heat, and the cycle is
repeated. During the winter, the air is cooler than the ground
below. Then, cool water absorbs heat from the ground and
releases it into the house.

Figure 21 This geothermal
power plant in Nevada produces
enough electricity to power about
50,000 homes.

Figure 22 The hot water in a
geothermal reservoir is used to
generate electricity in a geothermal
power plant.

Hasil (Bahasa Indonesia) 1:

Geothermal Power PlantsIn places where the geothermalreservoirs are less than several kilometers deep, wells can bedrilled to reach them. The hot water and steam produced bygeothermal energy then can be used by geothermal powerplants, like the one in Figure 21, to generate electricity.Most geothermal reservoirs contain hot water under highpressure. Figure 22 shows how these reservoirs can be used togenerate electricity.While geothermal power is an inexhaustiblesource of energy, geothermal power plants can be built only inregions where geothermal reservoirs are close to the surface,such as in the western United States.Heat PumpsGeothermal heat helps keep the temperature ofthe ground at a depth of several meters at a nearly constant temperatureof about 10° to 20°C. This constant temperature can beused to cool and heat buildings by using a heat pump.A heat pump contains a water-filled loop of pipe that isburied to a depth where the temperature is nearly constant. Insummer the air is warmer than this underground temperature.Warm water from the building is pumped through the pipedown into the ground. The water cools and then is pumpedback to the house where it absorbs more heat, and the cycle isrepeated. During the winter, the air is cooler than the groundbelow. Then, cool water absorbs heat from the ground andreleases it into the house.Figure 21 This geothermalpower plant in Nevada produceslistrik cukup untuk kekuatan tentang50.000 rumah.Gambar 22 air panaswaduk panas bumi digunakan untukmenghasilkan listrik panas bumipembangkit listrik.