ASHRAE Journal - July 2019 - 36

2019

ASHRAE TECHNOLOGY AWARD CASE STUDIES

in the return air. This is especially useful when the
public portion of the library is closed but the ofﬁces
are open.

County to ﬁne-tune the air-handling unit and mechanical systems' operation to the varying schedules of the
building and only condition the occupied areas.

Operation and Maintenance

Cost Effectiveness

The design team worked closely with the Ramsey
County operations and maintenance groups throughout
the design and construction process. Ramsey County
was involved in system selection, monitored construction to conﬁrm systems were installed correctly and with
adequate maintenance, and participated in a large part
of the commissioning process. The complete engagement of Ramsey County's staff was pivotal in owner buyin, education, and long-term success of the library.
Because the library has three rather distinct functions
within the building-the branch library, the administrative ofﬁces, and the community room-the three
parts have different operation and use schedules. The
design team worked with the building operations group
to develop a series of building control schemes within
the BAS. The building's control schemes allow Ramsey

As partners with the general contractor in a designbuild relationship, the design team received real-time
feedback on cost and budget through preliminary and
schematic design to achieve the most cost-effective,
energy-efﬁcient solution for this building. Multiple
mechanical schemes were analyzed, and energy savings
were compared against ﬁrst cost and life-cycle cost. A
geothermal system was strongly considered and resulted
in an EUI of 33.8 kBtu/ft2·yr (383.9 MJ/m2·yr). However,
with a payback of over 20 years, it was undesirable for the
client. Ultimately, the selected mechanical system strategies met the project's energy-efﬁciency goals and provided the client with the desired ﬂexibility. The mechanical systems made up 65% of the building's overall energy
reduction, and the strategies selected fell within the goal
15-year time line requested by the owner.

ASHRAE Learning Institute
Your Cost-Effective Training Solution

ASHRAE Learning Institute (ALI) takes a proactive role
in training professionals with up-to-date requirements
for the design, construction, and renovation of new and
existing buildings and their systems.
ALI offers a variety of instructor-led courses, developed
by industry experts.
Never stop learning. See how ASHRAE Learning
Institute can assist with your training needs.
Visit ashrae.org/ali for the complete list of
instructor-led training.

36

ASHRAE JOURNAL

ashrae.org

J U LY 2 0 19

http://www.ashrae.org/ali https://www.ashrae.org/

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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