ASHRAE Journal - September 2023 - 62
HONORABLE MENTION 2023 ASHRAE TECHNOLOGY AWARDS
face velocity, protecting students from contaminants
in the hood, versus the trend of allowing a reduced
face velocity to push energy savings further. In an
environment with inexperienced users, a 100 fpm
(0.5 m/s) face velocity and hood automatic sash closers
ensure the highest level of capture, containment and
overall safety, as chemical reactions or toxic vapors
occur under the hood.
HVAC design complied with Standard 55-2010,
assuming low activity and space temperatures of 72°F,
±2°F (22°C, ±1.1°C) in summer and 68°F, ±2°F (20°C,
±1.1°C) in winter. Thermal comfort within high volume,
high glazing spaces is improved in winter with radiant
floor heat and in summer with dynamic glazing, reducing
solar heat gain and glare. This has wellness synergy
for providing quality daylighting, controlling glare,
maintaining views and contributing to circadian rhythm.
Innovation
The HVAC system's design uses readily available
equipment types, innovative energy reduction
CASE STUDY
configuration, improved IAQ and facilitates ease of
maintenance. Ventilation air is served by three VAV
DOAS units, ducted in parallel to allow a high degree
of turndown to classrooms and general services while
creating redundancy for the building to be more
resilient if equipment fails. Outdoor air is delivered at
55°F (13°C) to simultaneously ventilate and provide the
first stage of cooling when spaces are occupied.
The OVAV terminals provide ASHRAE Standard
62.1-2010 minimum ventilation, increasing maximum
airflow to maintain a 600 ppm CO2 differential above
outdoor levels. CO2 demand control ventilation in the
space provides the first stage of cooling through the
OVAV, and as people enter the room, CO2 levels rise,
and additional 55°F (13°C) ventilation is delivered to the
classroom. The ventilation does not meet the full cooling
load, and the recirculating VAV supplements. The VAV
incorporates an economizer mode for free cooling and
can further reduce the CO2 levels when outdoor air
conditions permit.
For more, visit https://tinyurl.com/JournalExtras.
Desiccant and Energy Recovery wheels
available in standard and custom sizes.
Call or email us for a quote today!
info@rotorsource.com | www.rotorsource.com
225 -753 1700
225 -753 -1
62
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ASHRAE Journal - September 2023
Table of Contents for the Digital Edition of ASHRAE Journal - September 2023
Table of contents
ASHRAE Journal - September 2023 - Intro
ASHRAE Journal - September 2023 - Cover1
ASHRAE Journal - September 2023 - Cover2
ASHRAE Journal - September 2023 - 1
ASHRAE Journal - September 2023 - Table of contents
ASHRAE Journal - September 2023 - 3
ASHRAE Journal - September 2023 - 4
ASHRAE Journal - September 2023 - 5
ASHRAE Journal - September 2023 - 6
ASHRAE Journal - September 2023 - 7
ASHRAE Journal - September 2023 - 8
ASHRAE Journal - September 2023 - 9
ASHRAE Journal - September 2023 - 10
ASHRAE Journal - September 2023 - 11
ASHRAE Journal - September 2023 - 12
ASHRAE Journal - September 2023 - 13
ASHRAE Journal - September 2023 - 14
ASHRAE Journal - September 2023 - 15
ASHRAE Journal - September 2023 - 16
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ASHRAE Journal - September 2023 - 18
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ASHRAE Journal - September 2023 - 60
ASHRAE Journal - September 2023 - 61
ASHRAE Journal - September 2023 - 62
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ASHRAE Journal - September 2023 - 70
ASHRAE Journal - September 2023 - 71
ASHRAE Journal - September 2023 - 72
ASHRAE Journal - September 2023 - Cover3
ASHRAE Journal - September 2023 - Cover4
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