Page 270 - Low Temperature Energy Systems with Applications of Renewable Energy

Geothermal energy in combined heat and power systems 255

Fig. 6.31 Plant 2 with 1000 kW and 750 kW binary units. Large pipes at the top carry cooling
water to the condensers; the lower vessels are the evaporators (large diameter) and preheaters
(small diameters) for the units [18].

Fig. 6.32 Plants 1 and 2 with an installed capacity of 2030 kWe, modified from Google Earth.

488 m to 1618 m. Each well enclosure houses the wellhead and the mechanical pump
and motor.
The OIT CHP system is now complete. Besides geothermal, the campus also has a
large 2000 kW photovoltaic (PV) solar system to augment the electricity produced by
the geothermal units; see Fig. 6.29. The intermittent nature of the PV means it is used
as a peaking system.
The OIT campus is fully heated by geothermal fluid and about 35% of its electricity
needs are supplied by its geothermal binary units. When the PV system is producing,
about two-thirds of the electrical requirement of the campus is being met by renewable
energy.