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In 2005 S.M. Lawrence Company was asked to provide a quotation
to replace a boiler for the Commercial Appeal. After
talking with Benny Waller, Maintenance Director at the
largest circulated newspaper in the Mid-South, I
discovered a dilemma. It was September, cooler
weather was around the corner, and Benny needed a new
boiler for the administration building. MLGW had
condemned his old 125 horse Cleaver Brooks after many
years of dedicated service. The dilemma was that
it was September and a new Cleaver Brooks had
a 12 week lead time. Ouch! Our solution: A
Modular Boiler System.
We
called T. J. O'Brien Engineering to talk about our
options. They suggested that their PK (Patterson
Kelly) line of boilers would be the perfect fit.
Patterson Kelley is the leader in Modular Boiler
systems. After calculating our heating loads we
discovered that not only could we design and install a
system that would have a tremendous savings in gas
consumption, but we could have the entire project
completed in 5 weeks. Patterson Kelly keeps these
smaller boilers in stock so lead time was much sooner
than the competition.
These
3-PK boilers range in efficiencies of 85% on high fire
and 90+% on low fire. We installed modular
controllers with outdoor air reset. The idea is
that based upon the load required, each boiler will
fire as needed. Therefore on days when heating
demand is lower, this system will only fire one boiler
and then the next if the demand increases. By
doing this we have reduced the costs of gas consumption
and short cycling of the boilers. Eliminating
short cycling alone can have an estimated energy
savings of 15%. This project has a ROI (Return on
Investment) of 4.5 years.
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