HVAC Retrofits
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Getting the most from what you’ve got, and upgrading to get even more. From swapping out a particular item to replacing a whole boiler system or entire HVAC configuration, read up before you act.

ARTICLES

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Motor Control Techniques: VFDs, ECMs, and More, Part 1

An in-depth look at induction motors with voltage/frequency controlled variable frequency drives, induction motors with vector-controlled VFDs, and electronically commutated motors.
Kevin ricart
Kevin Ricart, P.E. Patrice Mulhern, P.E. Robert Pfaff, P.E.
May 28, 2020
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The topic of motors and motor control techniques is wide and varied. Part one of this two-part article will cover the principles of alternating-current (AC) motor operation and control.  


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Engineering Renovations

Engineering Renovations: Revitalizing the University of Minnesota's 90-Year-Old Pioneer Hall

Designers overcame numerous challenges to complete the $104.5 million Pioneer Hall expansion and renovation project in time for the start of the fall 2019 semester.
Deb Barnes, P.E.
May 28, 2020
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Pioneer Hall, one of four residence halls located within the University of Minnesota’s Superblock residential district, is prominently situated on the east bank of the Mississippi River on the university’s Twin Cities campus in Minneapolis. 


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