Tech Briefs Magazine - August 2021 - 33

Spacecraft Atmosphere Carbon Dioxide Capture
via Deposition
Applications include manned deep space exploration and terrestrial CO2 removal systems.
Ames Research Center, Moffett Field, California
he goal of NASA is to return humans
to the surface of the Moon, then journey
to Mars and even beyond. To accomplish
this, robust life support systems are
required to operate without reliance on
resupply. The current air revitalization
system on the Interna tional Space Station
(ISS) - the Carbon Dioxide Removal As -
sembly (CDRA) - utilizes sorbent-based
Temperature Swing Adsorption (TSA)
technology.
T
NASA Ames has developed a reliable
successor to the state-of-the-art cabin
atmosphere CO2 removal system. Space -
craft Atmosphere Carbon Dioxide (CO2)
Capture via Deposition is an air revitalizaPrecool
Chamber
MFC
PSA
CO2
5SCFM
HX2
MFC
1SLPM
CO2
Cabin return air
Janis
SC-10
CryoTel
GT
CO2
HX1
A
tion architecture that utilizes the different
physical phase-change properties of
ISS cabin-like constituents (nitrogen, oxygen,
carbon dioxide, water vapor, and various
trace contaminants) to selectively
separate constituents of interest such as
CO2 and trace contaminants.
As the main target constituent is CO2,
which does not condense in atmospheric
conditions, this architecture is re ferred to
as CO2 deposition, or CDep. The technology
addresses future CO2 removal and
life support system needs using a completely
different technical approach than
currently employed on the ISS. Instead of
using a sorbent, this technology utilizes
cooling to directly freeze CO2 out of the
atmosphere. Specifically, it involves forcing
a phase change of CO2 from the
cabin atmosphere by solidifying it onto a
cold surface.
CDep A
This novel patent-pending innovation
takes advantage of the condensation/
deposition temperature differences of air
components to selectively deposit carbon
dioxide from the atmosphere. Deposition
coolers can operate in a deposition mode
in which CO2 from the airflow is deposited
to generate CO2-depleted air and a
sublimation mode in which deposited
CO2 is sublimated into CO2 gas. The system
can alternately cycle between the
deposition mode and the sublimation
mode. A deposition system can also re -
move humidity in addition to CO2 via a
multi-stage process and can also significantly
assist in controlling the trace contaminants.
B
CO2
Concentrated
CO2
" Finhead "
MFC
5SLPM
CryoTel
GT
CDep B
CDep is highly reliable as it has no ex -
pendable materials, no vacuum is re -
quired, and needs minimal moving parts.
CDep also potentially eliminates the need
for a separate storage system to deliver
pressurized, pure CO2 to an oxygen generation
system such as the Sabatier
processor currently on the ISS.
NASA is actively seeking licensees to comCold
Tip
A schematic of the subscale CO2 deposition system.
mercialize this technology. Please contact
NASA's Licensing Concierge at Agency-PatentLicensing@mail.nasa.gov
or call us at 202358-7432
to initiate licensing discussions.
Follow this link for more information: https://
technology.nasa.gov/patent/TOP2-291.
" Cold Tube " Cools Without Air Conditioning
Chilled panels use less energy than conventional A/C and work in open spaces.
University of British Columbia, Okanagan, Canada
ir conditioners guzzle power and
spew out millions of tons of carbon
dioxide daily and they are not always
healthy - constant exposure to central
A/C can increase risks of recirculating
germs and cause breathing problems. Air
conditioners work by cooling down and
dehumidifying the air - an expensive and
not particularly environmentally friendly
proposition. To address these problems,
A
Tech Briefs, August 2021
Cov
researchers developed the Cold Tube,
which works by absorbing the heat directly
emitted by radiation from a person without
having to cool the air passing over
their skin. This achieves a significant
amount of energy savings.
The Cold Tube is a system of rectangular
wall or ceiling panels kept cold by
chilled water circulating within them.
Since heat naturally moves by radiation
www.techbriefs.com
ToC
from a hotter surface to a colder surface,
when a person stands beside or under the
panel, their body heat radiates towards the
colder panel. This creates a sensation of
cooling like cold air flowing over the body
even if the air temperature is quite high.
Although these types of cooling panels
have been used in the building industry
for several decades, Cold Tube does not
need to be combined with a dehumidifi33
https://technology.nasa.gov/patent/TOP2-291 http://www.techbriefs.com http://www.abpi.net/ntbpdfclicks/l.php?202108MDNAV

Tech Briefs Magazine - August 2021

Table of Contents for the Digital Edition of Tech Briefs Magazine - August 2021

Tech Briefs Magazine - August 2021 - Intro
Tech Briefs Magazine - August 2021 - Sponsor
Tech Briefs Magazine - August 2021 - Cov1
Tech Briefs Magazine - August 2021 - Cov2
Tech Briefs Magazine - August 2021 - 1
Tech Briefs Magazine - August 2021 - 2
Tech Briefs Magazine - August 2021 - 3
Tech Briefs Magazine - August 2021 - 4
Tech Briefs Magazine - August 2021 - 5
Tech Briefs Magazine - August 2021 - 6
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Tech Briefs Magazine - August 2021 - Cov3
Tech Briefs Magazine - August 2021 - Cov4
Tech Briefs Magazine - August 2021 - MD-Cov1
Tech Briefs Magazine - August 2021 - MD-Cov2
Tech Briefs Magazine - August 2021 - MD-1
Tech Briefs Magazine - August 2021 - MD-2
Tech Briefs Magazine - August 2021 - MD-3
Tech Briefs Magazine - August 2021 - MD-4
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Tech Briefs Magazine - August 2021 - MD-32
Tech Briefs Magazine - August 2021 - MD-33
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Tech Briefs Magazine - August 2021 - MD-38
Tech Briefs Magazine - August 2021 - MD-39
Tech Briefs Magazine - August 2021 - MD-40
Tech Briefs Magazine - August 2021 - MD-Cov3
Tech Briefs Magazine - August 2021 - MD-Cov4
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