●Natural
energy source
●Secondary energy
sources
●Heat
Sink temperature
to break Section
Insulation
●Biotechnology
●System devise |
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The geothermy is exists in
the earth interior heat energy, causes the ground temperature to
increase along with the depth, but the heat energy also by way of
the earth interior transmission to the surface dissipation. The
geothermal gradient probably is each under searches one kilometer,
the temperature rise 30 degrees centigrade. The earth interior huge
incomparable contains heat energy, however by the present
technology, we still could not mine willfully, can only develop the
earth's crust superficial part geothermal gradient exceptionally
high place the geothermal resource.
●Geothermal
heat exploitation
Geothermal heat use eclectic energy and direct two ways. From 2000,
the world geothermal heat eclectic about eight thousand watts,
direct use one million and five thousand watts. The thermal region
mostly is located at the remote mountainous area and the
transportation is inconvenient, because the early time the
transportation electric power is quite easy, therefore the
geothermal uses generates electricity primarily, afterward only then
faced the direct use development. One of reasons is the geothermal
power generation can only achieve 10% about the use efficiency, but
uses directly may enhance to 30% or 40%. And further because the low
temperature hot water geothermal resource (temperature is 50 ~ 150
degrees centigrade) (temperature is higher than 150 degrees
centigrade) far compared to the high temperature vapor geothermal
many resource, some national like Hungary, Romania, France and so on
geothermal temperature is not high, is impossible to do for
geothermal power generation, but actually has the full potential in
the direct use.
Geothermal heat use temperatures high and low do any purpose. It is
traditional electric centigrade up one hundred and fifty degree. If
use double heat electric energy geothermal heats that temperature
can be show down to miner hundred degrees. Hothouse and greenhouse
about eighty degree, heated swimming pool about thirty degree.
At present in geothermal
power generation domain, have four kind of main application system:
1.Geothermal heat steam electric energy system:
direct use geothermal heat steam to push steamship then produce
electric. This system round for safe, is main form geothermal power
generation, e.g. Tibet Yangbajain’s geothermal heat factory is
adopt.
2.Entire class generating system:
Is the geothermal pithead complete fluid, including all steam、hot
water and so on substance, the line delivers to the mechanical
facility, provides the kinetic energy to use the generate
electricity, discharges again to the condenser latter.
3.Pair rotate electric system:
call medium loop system or Rankine system, low temperature to be a
medium, calorific capacity from terrestrial heat system, liquid
state conversion gaseous state, to advance steamship eddy and than
push forward dynamo to generate electric power, common example that
use heat converter to give Freon addition vaporization, to use as
behave steamship engine.
4.Incandescent rock generation electric system:
Merton and Smith are the first to bring up in 1970, use underground
incandescent rock formations’ calorific capacity to invert
generation electric system; they chisel through two deep forty
thousand’s deep slope, use water to pour into in one slope,
●Taiwan
Geothermal Heat Resource Development Future Forecast
There are twenty-six
geothermal heats natural resources in Taiwan, main geothermal heat
more categories not volcano hot water type geothermal heat system,
Only Tatunshan has volcano geothermal heat system. Tatunshan
geothermal heat more potential, produce hot water that acidity
corrode problem not settle yet, stop for development use. Not
volcano hot water type thermal region's scale is small, each area
electricity generation potential is highest only the divisor
1,000,000 tiles, suits the small scale development. Beside except
use in the electricity generation, supplies the local electric power
or the industry uses for oneself, still permissible supplies the
labor, agricultural, commercial and the general housing direct use
and the development sightseeing and so on multi-objective uses.
Taiwan produces the energy not abundant; the geothermy is one of
important energy. In each kind of energy alternative, geothermal
resource's development hopes to obtain the achievement in a short
time. How to coordinate the regional economic planning and the place
industrial structure, makes most effective development use, is
important topic which is worth studying. Moreover encourages the
private investment and the foreign capital participation, also
accelerates the geothermy development feasible way.
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