ASHRAE Show Daily 2014 - Day 1 - (Page 10)
25-Year-Old Rec Center
Becomes Aquatic Paradise
KANATA, ONTARIO-The retrofit of
a 25-year-old conventional indoor city
recreation center into the new Kanata
Leisure & Fitness Centre Wave Pool
(KLFCWP)-an aquatic paradise featuring a wave pool, children's pool, water slide and spa-was a psychrometrics
and logistics challenge for the project's
engineer and mechanical contractor.
Meeting the engineering challenge
and creating the HVAC systems solution for the unique $500,000 recreation
center's retrofit was Goodkey Weedmark & Associates Ltd., Ottawa, ON,
Canada, and its design team of Steven
Hamilton, P.Eng., associate partner; and
Andre Bogdanowicz, P.Eng., principal;
and mechanical contractor T.P. Crawford, Gloucester, ON, Canada.
The agitation of water from a twostory water slide, spray fountains, a 7.5
m × 3 m 100°F whirlpool spa, plus a 40
m × 13.3 m wave pool requires a moisture removal capacity of 500 lb/h. Consequently, the new dehumidifier, which
replaced two existing dehumidifiers and
an air handler, required more capacity,
but needed to fit in a cramped mechanical room with no shipping door access
or adjacent space for expansion.
Instead of specifying two drop-in replacements, Goodkey Weedmark saved
Kanata tens of thousands of dollars in
rigging, installation labor and facility
downtime by specifying one large 8.5
ft (h) × 10 ft (w) × 24 ft (l) "Protocol"
NP-Series pool dehumidification unit
custom-manufactured by Seresco Technologies, Ottawa. The Ottawa branch
of manufacturer's representative HTS
HVAC Services helped Goodkey Weedmark develop the project's evaporative
rate calculations and the 80 ton (281
kW) dehumidifier's sizing.
Goodkey Weedmark, which has engineered more than a dozen indoor pools,
including several YMCA projects, also
specified the dehumidifier for space air
conditioning, which the original facility's design didn't include.
The Canadian rec center saved thousands with a dehumidification unit.
T.P. Crawford's main job challenge
was rigging the unit through the mechanical room's outdoor air louver,
which was enlarged to 2.8 m × 3 m (9.1
ft × 9.8 ft) for more access. Regardless
of the larger opening, Seresco still had
to factory-assemble the dehumidifier
for testing, disassemble to three 8 ft
(2.4 m) long sections for shipping and
rigging, then T.P. Crawford assembled
and installed it inside the mechanical
room. The louver opening was opened
SEE US AT BOOTH 130
and then refitted with a new outdoor air
damper/louver by Ventex, Bolton, ON,
Canada. The enlarged access was also
beneficial for complying with ASHRAE
Standard 62.1 outdoor air rates that have
increased since the original building's
construction in 1986.
Reducing the city's refrigerant dependence was another accomplishment
in the HVAC design. The Protocol dehumidifier, which was named after the
1997 Kyoto Protocol environmental treaty, was designed to use 75% less refrigerant than a conventional direct expansion
(DX) dehumidifier, but without a performance loss. The system uses nontoxic
propylene glycol for heat rejection to
outdoor dry coolers and supplants nearly
700 lbs. of toxic refrigerants. The NPSeries has a 25% refrigerant charge of
160 lb, but it's self-contained within the
refrigeration circuit and is less susceptible to leaks because it's factory-sealed,
charged and tested.
The refrigeration circuit transfers
heat via a heat exchanger to the glycol
circuit. Conventional dehumidifiers using 100% refrigerant are susceptible to
leaks because the long piping runs to
outdoor condensers are field-installed
and more susceptible to joint and condensing coil leaks. When in a vaporized state, refrigerants exit a leaking
system's piping through microscopic
leak holes and contaminate the atmosphere.
Glycol, on the other hand, is nontoxic and significantly environmentfriendlier than refrigerants such as
R-22 and the currently popular R410A. Consequently, the expected price
rise during R-410A's anticipated future
phaseout will have less of an effect on
Kanata's maintenance costs throughout
the dehumidifier's lifecycle.
hilmor Builds
On Launch Year
Success at Show
EAST LONGMEADOW, MASS.-
During the 2013 AHR Expo, hilmor
launched 150 tools and accessories
across multiple categories. Now, products are available in more than 1,100 distributors throughout the country. hilmor
is part of the Newell Rubbermaid family, the same company that produces
LENOX® and IRWIN® tools.
The hilmor booth will offer hands-on
demonstration opportunities for attendees to interact with the tools first-hand,
and the company will also debut more
innovative hand tools.
hilmor will host a happy hour at its
booth (559), from 4 p.m. to 6 p.m. on
Tuesday and Wednesday. The company
is also bringing back the wildly popular "retooled," half-glazed donuts at the
pop-up coffee shop.
10
ASHRAE Journal's Show Daily
January 21, 2014
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