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LBL scientists develop “smart”
roof coating to cool and warm
BERKELEY, Calif. — Scientists have
developed an all-season “smart” roof
coating that keeps homes warm dur-
ing the winter and cool during the
summer without consuming natural
gas or electricity.
Energy savings
Research fi ndings reported in Science
point to a groundbreaking technology that
outperforms commercial cool-roof systems
in energy savings.
“Our all-season roof coating automatically
switches from keeping you cool to warm,
depending on outdoor air temperature.
This is energy-free, emission-free air con-
ditioning and heating, all in one device,”
said Junqiao Wu, a faculty scientist in
TARC samples: The material looks like Scotch tape and can be
affi xed to a rooftop. (Berkeley Lab)
Berkeley Lab’s Materials Sciences Division
and the study’s lead author. Today’s cool
roof systems, such as refl ective coatings,
membranes, shingles, or tiles, have light-
colored or darker “cool-colored” surfaces
that cool homes by refl ecting sunlight.
The problem with many cool-roof systems
currently on the market is that they con-
tinue to radiate heat in the winter.
TARC (temperature-adaptive radiative
coating) can enable energy savings by au-
tomatically turning off the radiative cooling
in the winter, overcoming the problem of
overcooling. lbl.gov
March 15–16, 2022
Road to Chiplets:
Heterogeneous
Integration
Testability
MEPTEC presents the third
in a series of cross-functional
workshops focused on the practical
aspects of designing, implementing
(packaging), and testing Chiplets.
Join us online for two days of
lively discussion on the best known
methods (BKM) of heterogeneous
integration (HI) testability.
www.meptec.org