POWER April 2021 - 11

GLOBAL MONITOR
500-kW tidal turbine designed by European
developer SIMEC Atlantis Energy.
As significantly, in October, Chinese
technology developer GIEC successfully
installed a 500-kW structure combining
a wave energy conversion and aquaculture.
China's deployment of a " full-scale
wave energy converter " indicates it is
positioning itself as a global competitor,
said Ocean Energy Europe.
Finally, in another notable wave energy
development in December, Danish
company Wavepiston moved to PLOCAN
in the Spanish Canary Islands to
test two full-scale devices in a 200-kW
project. The device serves dual purposes,
reflecting a trend among some wave
developers to both produce power and
freshwater, in response to increased demand
from islands.
" The installation of this wave device in
Spain signals the beginning of a series of
deployments planned in the region over
the coming years. Several major projects
have been announced in Portugal, Spain,
Italy and Greece, as these countries
show increasing support for wave energy, "
noted Ocean Energy Europe.
-Sonal Patel is POWER's senior
associate editor.
April 2021 | POWER
First Commercial Deployment of
Supercritical CO2 Power Cycle
Taking Shape in Alberta
Siemens Energy and Canadian pipeline
company TC Energy in February agreed
to commission a novel waste-heat-topower
facility in Alberta by 2022 that
captures waste heat from a gas-fired
turbine operating a pipeline compression
station, and then converts it into
power using an innovative supercritical
carbon dioxide (sCO2
) power cycle.
The facility's innovative technology
is based on an advanced Rankine Cycle
that Ohio-based technology company
Echogen Power Systems (EPS) has developed
since its founding in 2007 under
numerous partnerships, including with
the Department of Energy and DresserRand
(now a Siemens business). The
company has quickly progressed the
technology it says could compete with
steam cycles from small multi-kilowatt
demonstration units developed in 2011
to its most recent multi-megawatt heat
recovery package, which it began to
commercially offer in 2019.
As Timothy Held, EPS chief technology
officer, told POWER in March, the
agreement between Siemens and TC
www.powermag.com
Energy marks a " culmination of a long
series of technical due diligence activities,
economic cost-benefit modeling,
and contractual negotiation. " If commissioned
as envisioned by 2022, the
pilot installation will make history, he
noted: " We are pleased to say that the
TC Energy system will be the first commercial
deployment of any type of supercritical
carbon dioxide (sCO2
) power
cycle in the world. "
EPS's waste-heat-to-power system is
essentially a heat engine-the 7.5-MW
EPS100-that uses a multi-stage recuperated
closed-loop cycle, where heat
from an industrial plant's or gas turbine's
exhaust stream is recovered though an
sCO2
ery pumps the liquid CO2
heat exchanger. " The turbomachinto
high pressure
and passes through a combination
of recuperators and waste heat exchangers
(without using a secondary oil loop)
before entering the turbo-expander,
which drives the shaft that in turn drives
a generator, " the company explained.
" Effluent CO2
exits the turbine, and passes
through a series of recuperators to exchange
more heat, and finally enters the
condenser where it is converted back to
liquid CO2
. "
11
https://www.clearspan.com/ http://www.powermag.com
POWER April 2021

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