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Integrated
Solar Combined Cycle System (ISCCS) In ISCCS, the solar thermal energy
is integrated into the steam cycle of a combined cycle power plant. The
most discussed technical concept is to oversize the steam turbine as to
operate with an increased amount of steam during solar operation. The
waste heat of the gas turbine is used for preheating and superheating,
while the solar heat is mainly used for Brief Description of project:
Integrated Solar Combined Cycle System (ISCCS). In ISCCS, the solar
thermal energy is integrated into the steam cycle of a combined cycle
power plant. The most discussed technical concept is to oversize the
steam turbine as to operate with an increased amount of steam during
solar operation. The waste heat of the gas turbine is used for
preheating and superheating, while the solar heat is mainly used for
steam generation. In this way the capacity of the steam turbine could be
increased up to the double of conventional combined cycle (CC) power
plants. The ISCC will be located in Kuraymat, about 95 km south of
Cairo, on the eastern side of the river Nile. The complete ISCC Project
comprises: 1. Solar Island shall consist of a parabolic trough solar
field capable to generate about 110 MWth of solar heat at a temperature
of 400°C, o The solar field is comprised of parallel rows of Solar
Collector Array (SCAs), sets of typically glass mirrors - that are
curved in only one dimension, forming troughs. The trough focuses the
sun’s energy on a absorber pipe located along it’s focal line (Heat
Collection Element "HCE") • The total area of the solar collectors is
about 220000 m2, connected in sierras and parallel to produce the
required temperature, tracking the sun from east to west while rotating
on a north-south axis • A heat transfer fluid or HTF (typically,
synthetic oil) is circulated through the receiver to remove the solar
heat. The HTF can be heated to temperatures of up to 400 oC. The fluid
is pumped to a heat exchanger to generate steam that can be superheated
in the Heat Recovery Steam Generator (HRSG) and integrated with the
steam generated from the C.C before pumping it to the Steam Turbine and
generate electricity. • The annual thermal energy of the Solar Heat
shall be about 240 GWh/a-th. 2. Combined Cycle Island shall consist of
one or two gas turbine(s) with ISO rating of about 80 MWe (total), one
or two HRSG, one (1) steam turbine of about 70 MWe, solar heat
exchanger(s) capable to absorb about 110 MWth of solar heat plus all
associated balance of plant equipment. Brief description of technology:
Parabolic Trough systems use one-axis tracking line-focusing to
concentrate the direct sunlight onto a series of receiver tubes -
also-called heat collection elements (HCE). A heat transfer fluid (HTF),
commonly thermal oil, is pumped through the tubes to transfer the
collected heat of the solar field and to convert to steam to drive a
conventional steam turbine cycle. Parabolic Trough Technology is the
most proven and least cost option for large-scale power generation using
solar technologies. Basically this is due to the nine Solar electric
Generating Systems (SEGS) in California with a total electric generating
capacity of 354 MWe, ranging in size from 14 MWe to 80 MWe. The ISCC
will be located in Kuraymat, about 95 km south of Cairo, on the eastern
side of the river Nile. The complete ISCC Project comprises: 1. Solar
Island shall consist of a parabolic trough solar field capable to
generate about 110 MWth of solar heat at a temperature of 400°C, The
solar field is comprised of parallel rows of Solar Collector Array (SCAs),
sets of typically glass mirrors - that are curved in only one dimension,
forming troughs. The trough focuses the sun’s energy on a absorber pipe
located along it’s focal line (Heat Collection Element "HCE") The
total area of the solar collectors is about 220000 m2, connected in
sierras and parallel to produce the required temperature, tracking the
sun from east to west while rotating on a north-south axis A heat
transfer fluid or HTF (typically, synthetic oil) is circulated through
the receiver to remove the solar heat. The HTF can be heated to
temperatures of up to 400 oC. The fluid is pumped to a heat exchanger to
generate steam that can be superheated in the Heat Recovery Steam
Generator (HRSG) and integrated with the steam generated from the C.C
before pumping it to the Steam Turbine and generate electricity. The
annual thermal energy of the Solar Heat shall be about 240 GWh/a-th. 2.
Combined Cycle Island shall consist of one or two gas turbine(s) with
ISO rating of about 80 MWe (total), one or two HRSG, one (1) steam
turbine of about 70 MWe, solar heat exchanger(s) capable to absorb about
110 MWth of solar heat plus all associated balance of plant equipment |
