POWER August 2011 - 19
5. Upgraded boilers. Two of the eight boilers have completed
performance and environmental upgrades. The remaining six boilers will
complete upgrades before the fall heating season begins. Courtesy: Super
Radiator Coils
Conveying Loading Palletising Packaging
Through Enwave facilities, Toronto also uses deep lake water
cooling for economical and environmentally friendly air conditioning
in large downtown office buildings (see " Natural Air Conditioning, "
POWER, April 2007). Water, at a constant 39F at 272
feet below the surface of Lake Ontario, is used to cool buildings
via a separate closed-loop cooling system.
Enwave sells an average of more than 2.5 billion pounds of
steam for district heating to 140-plus commercial buildings in
downtown Toronto, including residences and a hospital, for a total
of 40 million square feet over an average 170-day heating
season. In addition to the Pearl Street plant, steam is produced
at Enwave's Walton Street and Queen's Park facilities and then
distributed through the company's extensive underground pipe
network at 375F and 200 psig.
So far, conversion has been completed on two of the eight
boilers (boilers 5 and 6) at the Pearl Street Station (Figure 5).
The boiler test results are excellent: Boiler efficiency increased
from 79% to 96%, and the stack temperature was reduced from
300F to 240F with no precooling. In addition, the unsightly
stack plume was eliminated by extracting up to 95% of the
water that is formed as a combustion byproduct. NOx
emissions
also plummeted from 130 ppm to less than 3 ppm. The
remaining six boiler upgrades will be completed before the fall
heating season begins.
August 2011 | POWER
www.beumer.com
circle 11 on reader service card
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BEU_Power_99x273,4_FoerderBau_KOCH_GB.indd 1
24.03.11 15:21
19
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POWER August 2011
Table of Contents for the Digital Edition of POWER August 2011
Contents
POWER August 2011 - Cover1
POWER August 2011 - Cover2
POWER August 2011 - Contents
POWER August 2011 - 2
POWER August 2011 - 3
POWER August 2011 - 4
POWER August 2011 - 5
POWER August 2011 - 6
POWER August 2011 - 7
POWER August 2011 - 8
POWER August 2011 - 9
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POWER August 2011 - Cover3
POWER August 2011 - Cover4
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