Manning Foundation Appreciates
PEGG Pre-Nomination Coverage
Recent PEGG advertising and coverage of the Ernest C. Manning Innovation
Awards resulted in a favourable increase of Alberta nominations. Your
generous support is most appreciated. Thank you for helping us attract
Our preliminary evaluation of the submissions is now complete. By the
time this reaches your readers, I will have met with the selection committee
and the 2001 winners will have been chosen at that time. Winners will
be announced during the four weeks leading up to our awards dinner and
ceremony; we'll keep you informed of the date and location.
This year marks the 20th anniversary of the national awards; perhaps there
will be an Alberta presence on the stage and an Alberta location for the
Our call for nominations closes annually on Feb. 15, and we plan to place
an advertisement in the January 2002 PEGG.
Donald A. Park, P.Eng.
Manning Innovation Awards
No Junk Here
Re: Power to the Condos, the April 2001 PEGG cover story, and the subsequent
letter in the May PEGG, Junk Science?, from Norman Kennedy, P.Eng., correcting
an error and challenging the science as reported.
The statement that "CO2 emissions are below 40 ppm" was an error
and should have referred to CO, carbon monoxide, as Mr. Kennedy wrote.
As for his comments about "junk science," we'd like to point
out the following.
The CO2 emission reduction of the Heat PlusPower system relative to coal-fire
plants includes both the reduction due to power generation and due to
offset hot water heater fuel combustion. The CHP system, with 26 per cent
electrical efficiency and 75 per cent hot water heater efficiency, fueled
by natural gas with CO2 emissions of 49.7 tonnes per TJ, is 181 tonnes
of CO2 per year.
An equivalent amount of electricity from the newest technology coal-fired
plant, at 40 per cent efficiency and with 10 per cent transmission losses,
with CO2 emissions of 88 tonnes per TJ, is 231 tonnes of CO2 per year.
An equivalent amount of hot water from a hot water heater, at 75 per cent
efficiency and fuelled by natural gas, is 152 tonnes of CO2 per year.
What that means is that the CHP system results in more than 50 per cent
less CO2 emissions.
In response to Mr. Kennedy's comments regarding breathing the exhaust,
the turbine exhaust contains 18 per cent O2, and is indeed very breathable
-- the CO levels actually measured in our testing at Walker Court are
well below OSHA levels. Actual measured values from a U.S. EPA/Canadian
government study of the performance of the system will be published this
The CO2 levels are approximately 2.5 per cent or 25,000 ppm. OSHA Workplace
Atmospheres permissible exposure limits call for 10,000 ppm time weighted
average and 30,000 for short-term exposure. The emitted CO2 concentration
is sufficient to enable use to enhance growing conditions in a greenhouse,
but insufficient to create any hazard even with moderate makeup air mixing.
Mariah Energy Corp. recommends the use of the exhaust air directly only
in such areas in which direct combustion heaters are accepted under current
codes -- such as a garage, a warehouse, a greenhouse or another industrial
Richard Adamson, P.Eng
Vice-President, Marketing and Development
Mariah Energy Corp.
All In The Name
Re: Engineers, Microsoft Agree on Use of MCSE Designation, The PEGG,
May 2001. I want to congratulate APEGGA for successfully challenging Microsoft
to change its MCSE certification name.
Lobsang Dorjee, P.Eng.