Pump Motor Efficiency Requirements Part 2: Electronically Commutated Motors

Pump Motor Efficiency Requirements Part 2: Electronically Commutated Motors

Electronically commutated motors (ECMs) will play an important role in compliance with increasing motor efficiency requirements from the U.S. Department of Energy (DOE). But how do these motors differ from century-old direct current (DC) motor technology….

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Geothermal Well Drilling—Demystified Part 3: Thermal Conductivity Test

Geothermal Well Drilling—Demystified Part 3: Thermal Conductivity Test

Our test well is fully installed and grouted, and we've waited a full five days for the ground to cool down after all that drilling and compressed air. It’s finally time to begin our 48-hour thermal geothermal conductivity test….

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Geothermal Well Drilling—Demystified Part 2: Installing the Test Well

Geothermal Well Drilling—Demystified Part 2: Installing the Test Well

A well test is prescribed for any vertical geothermal loop field in a commercial-sized application. The well test provides an opportunity to analyze the heat transfer properties of geological formation at the well field site. Once analyzed, this information helps the design engineer….

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