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What can I choose in the calculator?

The calculator lets you choose the share of total centralised heat demand covered by Deep Geothermal in Switzerland in the selected year (2035 or 2050).

Deep Geothermal

image

Contents

  • Impact
  • Global market
  • Definition
  • Constraints
  • Assumptions
  • Value range
  • References

IMPACT – What are the impacts of Deep Geothermal?

In Switzerland, increasing the share of Deep Geothermal will have the following impacts:

Energy system

image Reduces final energy demand.

image May decreases total electricity consumption.

image Likely to reduce total fossil fuel consumption.

image Likely to increase the share of renewable energy sources in the energy mix.

image Likely to increase energy independence and energy security by providing sustainable baseload electric power.

Environment & Climate

image Very likely to reduce global CO2 emissions.

image Avoid emissions of harmful pollutants by replacing combustion processes.

image Drilling and injection may cause seismic activity and have other unforeseen environmental impacts.

Society & Economy

image Likely to decrease the cost of the energy transition.

image May improve balance of payments by reducing fossil fuel imports.

image Likely to reduce Confederation income from the tax on mineral oil under the current taxation system.

GLOBAL MARKET – What is the global market for Deep Geothermal?

In 2013 there were 68 geothermal power plants in Europe, of which 8 were installed in 2013. The total electric capacity of these plants is about 2 GWe. Also in 2013 there were 237 geothermal district heating plants in Europe of which 15 were installed in 2013. The total thermal capacity of these plants is about 4 GWth. [3]

DEFINITION / CONSTRAINTS

DEFINITION - What is Deep Geothermal?

Deep geothermal systems draw heat from the earth’s interior and use it to generate heat, electricity or both.

Systems that generate electricity either use the steam that is generated geothermally (steam plants) or use an intermediate working fluid (binary plants). In order to generate electricity, systems with relatively high operating temperatures are required (typically 200°C or above for steam plants and 120°C or above for binary plants). Systems that extract heat at lower temperatures are typically only used to generate heat.

Given the relatively high cost of drilling deep holes—often as deep as several kilometres—only large deep geothermal systems are likely to be economically viable.

CONSTRAINTS - What are the key barriers facing Deep Geothermal deployment?

• The drilling and liquid injection associated with deep geothermal systems can cause seismic activity.

• There is often significant uncertainty involved in the drilling process meaning that total plant costs are difficult to estimate until completion.

• Geothermal wells inherently have a limited lifetime of about 20-30 years after which the temperatures drop too low to continue operating the well economically. There is also uncertainty surrounding the lifetime of geothermal wells as the rock characteristics could change with time and use.

ASSUMPTIONS – WHAT ARE THE ASSUMPTIONS CONSIDERED IN THE CALCULATOR?

At the present moment there is no geothermal power plant for electricity production in Switzerland, that is the reason why there is no data for 2011.

Next tables contain the assumptions that have been introduced in the Geothermal electricity model of the calculator.

Capacity factor [1]
2035 2050
0.85 0.85
Emissions
2035 2050
CO2-eq. emissions [kgCO2-eq./kWhe] 0.0840 0.0840
Deposited waste [UBP/kWhe] 19.8 19.8
Cost
2035 2050
Specific investment [CHF/kWe] 11'164 6'310

VALUE RANGE - WHAT RANGE OF VALUES CAN I CHOOSE?

MIN Value: 0 GW

MAX Value:

2035 0.1GW The potential for 2035 is estimated to be 0.4 TWh [1], produced by 0.06 GW (Capacity factor = 0.8).
2050 0.7GW The potential for 2050 is estimated to be 4.4 TWh [2], produced by 0.57 GW (Capacity factor = 0.8).

REFERENCES

[1] VSE(2012), Electricité géothermique

[2] PROGNOS 2012, Die Energieperspektiven für die Schweiz bis 2050, Energienachfrage und Elektrizitätsangebot in der Schweiz 2000–2050.

[3] European Geothermal Energy Council, Geothermal Market Report 2013/2014

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c_geo_more.1423677166.txt.gz · Last modified: 2019/10/22 09:17 (external edit)