Net Zero Competition 175
HOK’s internal Net Zero Energy Design
heating and cooling. As a semi-porous surface,
spaces accommodate urban farms that grow
Competition challenged teams to create a
the veil directs water runoff to ﬁltration
food. Photovoltaic panels on the facade
conceptual net zero energy design for a site in
terraces for reuse.
capture solar energy, while a wind turbine
their local community.
generates wind energy. For the Feedback Hydronics proposal, a fully
Speciﬁc urban inﬁll sites were pre-selected in
integrated hydronic heating and cooling system
The D-Breath medical ofﬁce building in
each ofﬁce location. Entrants chose from four
powers a culinary school and restaurant in
Beijing features a passive ventilation system
potential programs — medical ofﬁce building,
St. Louis. The system allows for feedback and
that puriﬁes and ﬁlters the air, helping
residential, commercial ofﬁce building or
self-correction while it adjusts operations
to mitigate air pollution in the region. An
academic building — with the ability to add
in response to desired and actual outputs.
intelligent, charcoal-brick framework and
retail and mixed-use components.
Embedding a fully integrated solar thermal
inﬁll system incorporate smart modules.
skin within the hydronic closed-loop system
The system harvests solar heat for energy
Teams were required to use HOK’s Sustainable
minimizes loss and maximizes gain. This
exchange. Natural ventilation strategies are
Analysis Tool to obtain climate data, set
quilt-like skin surface has four pod types for
integrated into the structure and envelope.
energy use intensity (EUI) targets and estimate
solar thermal collection, rainwater harvesting,
Customizing the inﬁll system to the speciﬁc
the size of on-site renewable energy systems.
photovoltaics and glazing. Secondary systems
geographic location maximizes the building’s
include a subterranean labyrinth, an anaerobic
performance and gives the design ﬂexibility to
digester and an electronic chiller.
adapt to different locations across the world.
The design for the SoLAr mixed-use residential, commercial and retail project
◄ solar view from southeast
in Los Angeles integrates water, power and
The Urban Farm proposal, a mixed-use
ventilation systems. Inspired by commercial
commercial building and culinary school in
installations in the Mojave Desert, the team
Shanghai, generates energy through highly
designed a free-form veil with jewel-like
efﬁcient systems that take advantage of the
concentrated photovoltaic (CPV) collectors.
urban location. The building is divided into two
Heat generated by the CPV system can be
volumes to separate energy generation from
used for solar water heating and geothermal
energy collection systems. Double-height
2015 design annual
Published on Oct 1, 2015
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