ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 25

PHOTO A. The parking garage at Stavanger Airport following a
vehicle fi re in January 2020. Credit: Carina Johansen/EPA-EFE/Shutterstock
BY GEOFF SHEARD, DSc, U.S. TECHNICAL ADVISORY GROUP
TO INTERNATIONAL ORGANIZATION FOR STANDARDIZATION
TECHNICAL COMMITTEE 117, FANS
A
monoxide and oxides of nitrogen, which are harmful to
human health and, thus, must be monitored and, when
they rise above a predetermined level, controlled.
The primary concern of a parking-garage-ventilationn
enclosed parking garage-that is, a structure
designed for automobile storage with openings
along less than 40 percent of its perimeter-requires
mechanical ventilation to control pollutants generated
during normal operations and to remove smoke in the
event of a fi re. Though ducted systems traditionally have
been utilized for these purposes, today's computational
tools facilitate the design of lower-cost unducted systems.
This article will provide guidance on the use of computational
methods for the design of unducted parking-garage
ventilation systems that minimize both fi rst and operating
costs, dynamically manage the removal of pollutants,
and, critically, are optimized for a range of fi re scenarios.
Understanding the Need for Ventilation
Despite the trend toward electric vehicles, the overwhelming
majority of automobiles on the road today
use petroleum for fuel. Although internal-combustion
engines burn cleaner than ever, they still emit carbon
www.amca.org
system designer, however, is the extraction of smoke in the
event of a fi re. The leading cause of death in any building
fi re is not the effects of heat or fl ame but, rather, smoke.
When a fi re develops in a space, smoke will rise from
the fi re and spread horizontally along the ceiling. When
it cools, the smoke will fall from the ceiling, forming a
barrier between any occupants and their means of egress.
Keeping means of egress clear of smoke long enough
to permit evacuation-regardless of a fi re's location in
the structure-requires the defi nition of a series of fi re
scenarios and the design of a system to handle them all.
Think of it as a structured way of preparing for the worst.
The need to keep means of egress clear of smoke in
the event of a fi re is illustrated by Photo A. On Jan. 7,
2020, a diesel vehicle on the ground fl oor of the almost
completely occupied 3,000-vehicle-capacity parking
garage at Stavanger Airport in Sola, Norway, caught fi re.
The fi re quickly spread and became so hot that an entire
section of the fi ve-story structure collapsed. There were
said to be no reports of injuries.
2021 AMCA inmot ion 25

http://www.amca.org http://www.amca.org

ASHRAE Journal Supplement - AMCA InMotion - November 2021

Table of Contents for the Digital Edition of ASHRAE Journal Supplement - AMCA InMotion - November 2021

Contents
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - BB1
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - BB2
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - Cover1
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - Cover2
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - Contents
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 2
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 3
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 4
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 5
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 6
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 7
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 8
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 9
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 10
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 11
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 12
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 13
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 14
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 15
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ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 18
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 19
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 20
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 21
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 22
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 23
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 24
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 25
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 26
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ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 28
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ASHRAE Journal Supplement - AMCA InMotion - November 2021 - Cover3
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - Cover4
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