Geothermal Power Generation

Geothermal Power Generation

Geothermal Energy
The Power Generation Method
Utilizing the Abundant Resources of Japan

What is Geothermal Power Generation?

It is a power generation method using hot water and steam produced by underground magma.

Flash Steam Power Generation

Flash Steam Power Generation

※Mouseover the images to show a explanation

  • Steam and hot
    water separated.
  • Steam turbine-driven generator
    produces electricity.
  • Steam condensation at low
    condenser pressure improves the
    power generation output.
  • Cooling tower cools the warm
    water from condenser to
    obtain cold water. The cold
    water is pumped back to
    condenser for cooling.

The geothermal fluid is taken out of the ground, separated into steam and hot water, and the steam is used to generate electricity.

Binary Power Generation

Binary power generation

※Mouseover the images to show a explanation

  • Steam and hot
    water separated.
  • Separated steam
    transfers its heat to
    generate hot water.
  • Pressurized Hot water
    transfers its heat to the
    working fluid and
    vaporizes it.
  • Vaporized working fluid rotates the
    turbine. Turbine drives the generator
    to produce electricity.
  • Condensation of working fluid at low
    condenser pressure improves power
    generation output.
    The subcooled condensate is pumped
    back to the evaporator.
  • Cooling tower cools the
    warm water from the
    condenser to obtain cold
    water. The cold water is
    pumped back to the
    condenser for cooling.

The steam or hot water from the geothermal reservoir is used to vaporize a working fluid with lower boiling point. The vaporized working fluid then rotates a turbine to generate electricity. As the power is generated by a secondary working fluid, this method is called as Binary power generation.

Features of Binary Power Generation

  • 低温度の蒸気・熱水で発電可能

    Power Generation with Low Temperature Steam / Hot Water

    Unlike flash power generation, with the use of lower boiling point working fluid, it is possible to utilize low temperature steam / hot water (<150°C) for power generation.

  • 既存の温泉井戸を活用できる

    Existing Hot Spring Wells Can Be Used

    It is possible to utilize an existing hot spring well as it can generate power even with a low-temperature heat source. This reduces the cost of drilling wells and shortens the construction period.

IWATEC’s Geothermal Power Generation Scheme
Utilizing Existing Hot Spring Wells
Working in collaboration with local community

IWATEC’s Geothermal Power Generation Scheme Utilizing Existing Hot Spring Wells Working in collaboration with local community

Uses of Hot Spring Well

  • 01---Direct utilization of the heat from hot spring wells

    Direct utilization of the heat from hot spring wells

    smoke

    pipe

    smoke

    Used for power generation

    gear

    light bulb

  • 02---Cascade utilization of the heat from hot spring wells

    Utilizing the energy of hot springs

    smoke smoke smoke

    Utilizing the energy of hot springs

    smoke

    gear

    light bulb

Benefits of Geothermal Power Generation

  • Constant Power Generation

    Constant Power Generation

    Electricity can be generated throughout the year, and is attracting attention as a base load power source.

  • Reuse of Steam / Hot Water

    Reuse of Steam /
    Hot Water

    Steam / Hot water after generating power can be reused for bathing or greenhouse cultivation.

  • Low CO2 Emissions

    Low CO2 Emissions

    Derived from natural energy sources, and no fuel combustion to generate electricity, so it emits less carbon dioxide than thermal power plants.

Consultation About Geothermal Power Generation

How much does it
cost?

Is it possible with
my hot spring?

Consultation About Geothermal Power Generation

head

How much electricity
can be produced?

Is the construction
procedure difficult?

Please contact us for business details, questions or concerns.

PAGETOP