Israeli technology will soon begin harnessing the light of southern Spain at a
research and development park located on the country’s sun-drenched
AORA Solar, an Israeli developer of applied
ultra-high temperature concentrated solar power (CSP), will be opening its
second-ever gas-turbine solar thermal power station in Almeria, Spain, on
February 7. Their first such plant was opened at Kibbutz Samar in the Arava
Desert in near Eilat in June 2009. The roughly 2,000-square-meter facilities are
capable of supplying 100 kilowatts of electricity per hour to their respective
regions and about 170 kilowatts of heat energy as a byproduct, which in the case
of Spain will be used to power an adjacent desalination facility.
there to demonstrate the viability of the design, as is the one in Samar,” AORA
CEO Zev Rosenzweig told The Jerusalem Post
on Friday, noting, for comparison’s
sake, that 100 kilowatts have the ability to power about 60 to 80
The AORA system operates on a hybrid basis, in which it can
operate with solar-only mode, fuel-only mode (which is used at night) or a
combination of the two, on a cloudy day, for example. While both the Almeria and
the Samar plants are using diesel fuel as their second source, the plan is to
switch the Samar facility to natural gas as soon as supplies become readily
Meanwhile, the company is also looking at other options for
the facilities, such as bio-gas, which would make use of sources such as cow
manure and vegetable waste, according to Rosenzweig.
“The switch from one
type of fuel to the other is relatively simple,” said Pinchas Doron, AORA’s
chief technology officer. “You don’t really need to tear down the entire plant
to switch fuels once natural gas or bio-gas becomes available.”
no need for a storage system, as the facility is constantly able to produce
energy due to the dual sources.
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Storage systems, Rosenzweig explained,
are also quite inefficient and consume a lot of energy when taking the supply in
and out of storage.
Rosenzweig explained that due to the modular design
of the facilities, the system also takes up much less space than a photovoltaic
field or other types of concentrated solar power. The base unit, “like Legos,”
can be duplicated to increase the size of a system, without having to enlarge
the surface area of the original piece and without requiring contiguous or flat
land, according to Doron.
“We can distribute units in several patches,
not really adjacent to each other, and manage and run them as a single plant,”
Doron said. “It’s not just less land – it’s much more
Meanwhile, each of the 52 panels – called heliostats – in
the unit can track the motion of the sun along two axes and then directs the
sun’s light to a 35-meter-high tower that houses a solar receiver as well as a
gas turbine, based on technology developed at the Weizmann Institute of
The receiver uses the sun’s rays to heat the air to 1,000
degrees Celsius and directs the resultant thermal energy into the turbine, which
converts it into electricity, according to AORA.
“The units are
relatively small, so therefore the distance from the mirror to the tower is
small,” Rosenzweig said.
The company will also be using their updated
expertise gained from constructing the brand-new Spanish facility to retrofit
the Samar plant, according to Rosenzweig.
AORA’s decision, like that of
many other Israeli renewable energy innovators, to expand to markets outside of
Israel is a testament to the problems the business faces at home, he said. While
he can receive 26 euro cents for generating a kilowatt-hour of solar electricity
in Spain, the Israeli system would compensate him with only $0.20 for that same
amount of energy, Rosenzweig said.
“What really upsets us is that you can
get much more money using Chinese photovoltaic panels in Israel than using
Israeli technology to generate solar electricity in Israel,” he
While providing higher feed-in tariffs up front may be expensive
for governments, countries like Spain and Italy are doing so in order to promote
long-term renewable energy development for their countries, which will eventually
reduce their reliance on foreign oils, Rosenzweig explained.
government, he said, needs to “sit down and re-examine [its policies] from
scratch,” so that it doesn’t deter its own innovators from seeking markets
“Whoever sets the rates needs to have a longer-term plan, and
the rates should reflect what the government hopes to achieve by providing
feed-in tariffs,” he said.
“Israel has greater solar assets but lacks a
coherent strategy for exploiting them.”
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