ASHRAE Journal - July 2019 - 33

FIRST PLACE | 2019 ASHRAE TECHNOLOGY AWARD CASE STUDIES

Ramsey County Library set ambitious energy goals for its
new branch library in suburban Shoreview, Minnesota,
northeast of Minneapolis-St. Paul. As with many newer
libraries, Ramsey County Library Shoreview provides
multiple resources for a growing community-an educational resource for children, teens and adults; and a
community gathering place for diverse groups and
interests. The civic leader in sustainability and environmental stewardship uses 70% less energy compared to
the Minnesota energy standard.
Opened in January 2017 on a civic
campus that includes the City Hall,
community center, school district
ofﬁces and other public agencies,
the 32,565 ft2 (3025 m2), single-story
library consists of three architecturally distinctive, brick-clad volumes
with expansive windows overlooking
the campus. Inside, an open plan
subdivides library and community
spaces into varying scales to meet
multi-functional programming,
which includes:
* 22,000 ft2 (2044 m2) of library
space for book stacks, a computer
area, teen and children's sections,
multiple study rooms, a marketplace, community room; and
* 11,600 ft2 (1078 m2) of administrative space for system-wide
Ramsey County Library and Ramsey
County technology services.
With this newest branch, the
library recognized the opportunity
to set ambitious energy-efﬁciency
goals that would serve the community long-term, including:
* Meet Minnesota B3 Guidelines
for site, water, energy, indoor environment, materials and waste.
* Achieve 70% reduction in energy
use compared to a baseline building
Sarah Berseth is a mechanical engineer and associate vice
president at HGA in Minneapolis, Minn.

in Minnesota's energy standard, SB
2030.
* Design for ﬂexibility to adapt to
changing programming and energy
needs.
The engineering and architecture team exceeded goals through
integrated solutions that included
underﬂoor air distribution, highefﬁciency air-cooled chillers, controls tailored to occupant use in
concert with the building envelope,
passive solar control and 100% LED
lighting. Energy-efﬁcient planning
resulted in 70% reduction in energy
use, 41% reduction in water use, and
44% reduction in carbon output.

Mechanical System

The mechanical system (Figure 1)
integrates several key components
to achieve maximum efﬁciency,
including:
Underﬂoor Air System. This
was pivotal in meeting the client's desire for future ﬂexibility. In
addition, it proved to be extremely
energy efﬁcient.
Zone Controls. Motorized
dampers in underﬂoor ductwork
provide zonal control. The dampers open and close based on space
thermostat setpoints. The variable
volume air-handling unit ramps

J U LY 2 0 19

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ASHRAE JOURNAL

33

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ASHRAE Journal - July 2019

Table of Contents for the Digital Edition of ASHRAE Journal - July 2019

Contents
ASHRAE Journal - July 2019 - Intro
ASHRAE Journal - July 2019 - Cover1
ASHRAE Journal - July 2019 - Cover2
ASHRAE Journal - July 2019 - 1
ASHRAE Journal - July 2019 - Contents
ASHRAE Journal - July 2019 - 3
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ASHRAE Journal - July 2019 - Cover3
ASHRAE Journal - July 2019 - Cover4
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