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air enters the boiler.
Steam turbines exhaust low-grade
heat that normally goes to waste.
During winter, UAF’s heat recovery
system captures exhaust heat from the
turbine and transfers it via the chilled
water distribution system for preheating the air into the buildings throughout campus. In the summer, the surface condenser is removed from service
and the chilled water system functions
The air-cooled condenser controls
are designed for sub-arctic conditions.
The system varies air flow over the
ACC cells to ensure that no cells stagnate and potentially form ice. In addition to these features, some renewable
energy generation will be installed. Solar panels that will be installed on the
entire south side wall of the ash handling building will generate up to 45
kilowatts during summer.
extreme weather conditions, and a
space constrained site were increased
when the design was also to account
for UAF’s role as an essential facility
in the community, a place of refuge.
Buildings had to be able to functionally withstand seismic events. The soils
underneath the facility were porous
and sandy, therefore were subject to
liquification in an earthquake. They
had to be consolidated down to 50 feet
deep before construction began.
The final design produced some
novel features. Combustion air can be
pulled from out outside or inside the
building, depending on the time of
year. In warm weather, an intake duct
takes air from higher in the building,
which takes advantage of heat collect-
ed in the upper building. It reduces the
amount of pre-heating required before
lowest PM2.5 emissions guarantee for a
coal boiler in the U.S.
As the detailed design process began, UAF had selected the construction
manager at risk (CMAR) contractor;
this early involvement would allow the
project team to capitalize on the contractor’s construction expertise and
implement it in the design effort. The
CMAR contractor, Haskell Davis Joint
Venture (Haskell Corp. and Davis Constructors), provided independent cost
estimating and design review as each
segment of the project developed. Stanley Consultants partnered with a local
firm, Design Alaska, which performed
civil, architectural, HVAC, plumbing
and fire protection planning. Design
Alaska also provided insight into artic
Engineering challenges for seismic,