ASHRAE Show Daily 2014 - Day 1 - (Page 36)
Aged Warehouse Becomes Showcase
ASHEBORO, N.C.-Engineers and architects took
the seemingly impossible task of recycling an outdated industrial factory into a LEED Gold showcase
of the HVAC industry's most innovative equipment.
Transforming the former 46,000 ft2 (4273 m2)
$850,000 Klaussner Furniture Plant's uninsulated brick
shell into a high efficiency educational facility for Randolph Community College (RCC) proved challenging
for two Raleigh, N.C., firms, consulting engineering
firm Progressive Design Collaborative (PDC) and architecture firm Smith Sinnett Architecture.
With the encouragement of RCC's Cindi Goodwin, director of facilities at the Asheboro, N.C.-based
technical school, PDC's Scott Ennis, P.E., project engineer, and Steve Campbell, P.E., president, thought
well beyond convention. They designed one of the nation's first combination of active chilled beams with
an off-peak hours ice storage/chilled water loop.
The foundation of the Continuing Education and
Industrial Center's (CEIC) cooling system is 184
IQHC active chilled beams and two Pinnacle dedicated outdoor air systems (DOAS)-both products manufactured by SEMCO, Columbia, Mo. (Booth 8715).
The chilled water loop is supplied by a 130-ton Model
CGAM air-cooled chiller with scroll technology manufactured by Trane, Pueblo, Colo. (Booth 1302); and
an ice storage system by CALMAC, Fair Lawn, N.J.
36
An industrial factory was turned into a LEED Gold college building.
(Booth 1018). All mechanical systems were installed
by American Industrial Contractors, Greensboro, N.C.
The two-pipe chilled beams, which range from 2 ft
to 10 ft (0.6 m to 3 m) in length, supply 100% of the
$7.6-million facility's cooling. Chilled beams have the
potential for condensation in humid environments such
as North Carolina. Therefore, PDC's DOAS specification delivers dry outdoor air to the chilled
beams to prevent condensation and comply with
ASHRAE Standard 62.1. Besides providing a
comfortable relative humidity (RH), the DOAS/
chilled beam cooling strategy's comparatively
small 6 in (152 mm) diameter ductwork saves
significant ceiling space. Chilled beams also use
approximately 40% less fan horsepower versus
the alternative of a conventional rooftop and ductwork system. "We wanted to keep ceiling heights
at 10 ft, (3 m), so the inherent feature of the active
ASHRAE Journal's Show Daily
chilled beams' reduced duct sizes caught our interest,"
said Scott Ennis, who had never specified a chilled beam
project before, but is already specifying them again for a
hospital with low ceilings.
Besides indoor air comfort, the two 10,000 cfm (4700
L/s) DOAS systems also add to the project's sustainability
and IAQ, because they use molecular-sieve enthalpy wheel
technology to dehumidify outdoor air and recover heat
from exhaust air for pre-heating outdoor air. Compared
to silica gel desiccant wheels, the DOAS' molecular-sieve
technology quickly adsorbs the exhaust air's moisture, but
not its contaminants, which can potentially pollute incoming outdoor air and degenerate IAQ. The enthalpy wheel
also uses acid-resistant, anti-microbial and anti-stick coating treatments that help sustain the equipment's life cycle
and helps maintain design static pressures.
The CEIC's comprehensive energy savings result in
a six-year payback of the MEP specification.
January 21, 2014
http://www.foamsupplies.com
http://www.ecomatesystems.com
http://www.foamsupplies.com
http://www.ecomatesystems.com
Table of Contents for the Digital Edition of ASHRAE Show Daily 2014 - Day 1
ASHRAE Show Daily 2014 - Day 1
https://www.nxtbookmedia.com