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|Tuesday, April 01, 2014|
BY APRIL STREETER | OB CONTRIBUTOR
Nothing is more ‘old school’ than an oil-burning boiler. These behemoth machines, with their giant combustion chambers and extensive heating ductworks, live in every school building Portland Public Schools (PPS) owns.
But they don’t burn oil anymore. Three years ago PPS set out to begin to convert the 1930s-era boilers from diesel/bunker fuel to cleaner-burning natural gas by replacing their internal burners. By doing so, Oregon’s largest school district has realized impressive carbon dioxide (CO2) emissions reductions in the bargain.
At first, the proposed conversion was seen purely as a cost- and energy-saving measure. PPS was using around a million gallons of a diesel/bunker fuel mix, called PS 300, annually for its 47 schools.
“The fuel was delivered by barge to Portland, and rumor had it that that might be switched to trucks, with a big impact - higher costs,” said Tony Magliano, PPS facilities director. “So we started looking around for a replacement.”
What PPS found was that a relatively small investment of around $11 million for burner upgrades in all the boilers would allow them to use natural gas, thus saving the district an estimated $1.8 million in fuel and maintenance costs each year. The cost savings were ample, yet serendipitously, eco-benefits turned out to be as impressive. Getting rid of the oil burners would be like taking 2,500 cars off the road each year.
First, though, PPS would have to find money for the conversions, no easy feat in a perennially cash-strapped funding atmosphere. Through Governor Kitzhaber’s Cool Schools initiative, a small portion of the total budget could be financed.
After some thought, PPS decided to privately finance the remaining $9 million in project costs, planning to pay back the loan just in five years from fuel savings. Working with SKANSKA as general contractor and with NW Natural running the natural gas lines to each school’s boiler room, PPS managed to switch out 33 schools’ burners in the summer of 2012.
“We had to work around school schedules and we needed to do all those 33 schools at once,” Magliano said, in order to make the first payment on the debt. Luckily, he added: “Our savings exceeded projections.”
In the first year, not only did the school district easily service its debt — but by the close of its fiscal year 2012-2013, PPS also cut its carbon emissions by just over 5,000 metric tons, and reduced the many maintenance hours that employees use to spend (in full protective suits and respirators) to "punch" the boilers - i.e. scrub out black soot accumulating in boiler tubes.
In the summer of 2013, the remaining 14 schools got their natural gas burners installed. By the end of this school year, PPS expects the CO2 reductions will total 6,300 tons annually
Though PPS hadn’t initially factored it in, the switch further allowed the district to reduce the heights of schools’ brick chimneys, which slightly reduces their danger in a seismic ‘event,’ as well as let it decommission many underground fuel storage tanks.
One other fortuitous benefit of the conversions, especially in light of rising tension over air quality around sites like the former PPS Clarendon school building in North Portland, is the toxic air emissions reductions.
Jeff Haman, PPS energy specialist, calculated that just with the first 33 burner conversions CO2 emissions dropped by 44% and methane emissions dropped 78%. In addition, nitrous oxide (NOx) emissions dropped 87% and particulates (soot) emissions were 90 – 95% eradicated.
As soot and NOx are both implicated in cardiovascular diseases as well as asthma and other respiratory ailments, the burner conversions are a small but beneficial contribution to Portland’s air quality and childhood health.
“It’s particularly relevant for Portland area schools near large emitters of neurotoxins like manganese,” Peveto said. “It is true for NW Portland schools and potentially even more for North Portland schools like Roosevelt and the former Clarendon campus.”
Both public and private institutions could stand to gain, not just monetarily but also in contributing to the state’s improved air quality and health outcomes by planning to transition operations to cleaner fuel use. In some cases biofuel boilers might even be cost effective (and could spur Oregon’s alternative fuels industry), though natural gas currently holds a cost advantage.
“We think more school districts, hospitals, and college campuses would benefit by making [this] switch,” said Melissa Moore, NW Natural communications manager. “Another category are manufacturers, which when switching can experience cost savings, environmental benefits and less maintenance.”
Friday, November 20, 2015
BY JASON NORRIS AND MARY FAULKNER
It’s been a volatile year in equities and heading into the holiday season, it doesn’t look like these market extremes will dissipate.
Tuesday, November 03, 2015
PHOTOS BY JASON E. KAPLAN
Wednesday, October 28, 2015
BY KIM MOORE
A conversation with Patrick Curran, CEO of CareOregon.
Friday, October 02, 2015
BY KIM MOORE
Our intrepid (and expecting) research editor finds the child care search involves long waiting lists, costly fees and no certainty of securing a place before she goes back to work.
Thursday, November 12, 2015
BY LINDA BAKER
Raye Miles, a 17-year taxi industry veteran, lacked the foresight to anticipate the single biggest trend in the cab business: breaking the law.
Wednesday, September 30, 2015
BY KIM MOORE
Striving for social equity is the mission of many nonprofits, and this year’s 100 Best Nonprofits to Work For in Oregon survey shows employees are most satisfied with their organizations’ fair treatment of differing racial, gender, disability, age and economic groups. But as a national discourse about racial discrimination and equity for low-income groups takes center stage, data show Oregon’s 100 Best Nonprofits to Work For still need to make progress on addressing these issues within their own organizations.
Saturday, October 24, 2015
BY JACOB PALMER | DIGITAL NEWS EDITOR
What's it like working with your sister and how do you compete in Portland's crowded artisan ice cream space?
|The Love Boat|
|The Food Pod Grows Up|
|The High Road|
|Tinker, Tailor, Portland Maker|
|The Shift to Community Health Care|
|The Harder They Fall|
Economic diversity has proven a smart strategy for the Port of Hood River. How can other Oregon communities replicate the model?
Phone, Internet needs of small community school districts earn attention of top-five telecom provider.
Farmland LP grows its vision for organic farming in Oregon.
The Salem Convention Center has capped its tenth anniversary year by earning the prestigious “Best of the Best 2015” award from NW Meetings & Events magazine. Selected as the Best Convention/Conference Venue in Oregon by meeting and event planners from Alaska, British Columbia, Idaho, Oregon and Washington, the Salem Convention Center ranked above the Oregon Convention Center and the Portland Art Museum.
The Oregon Cooperative Hall of Fame honors individuals for their outstanding contributions to the successful building and operation of Oregon agricultural cooperatives.
Health insurer reports $10.2 million in net income after taxes through the first nine months of 2015.