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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

Competition: 2014

2015 HOK Design Annual