ASHRAE 90.1-2010/2013: Impact on Variable Speed Pump Control in Chilled Water Systems

ASHRAE 90.1-2010/2013: Impact on Variable Speed Pump Control in Chilled Water Systems

Today we begin a series of blogs exploring modern variable speed pump control. While we have written about variable speeding pumping in the past, we believe that the increasing presence of variable speed systems, along with the rapid evolution of control options, warrants a comprehensive look at variable speed pump control as a...

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How to Pick a Centrifugal Pump Part 9: Over Speeding HVAC Pumps & Motors

How to Pick a Centrifugal Pump Part 9: Over Speeding HVAC Pumps & Motors

There are times when slightly more capacity or a little more safety factor is warranted in a pump selection. Often we are asked about increasing the speed of the motor above the nameplate rated RPM. There are several things to examine.... 

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How to Pick a Centrifugal Pump Part 8: Motor Speed Considerations

How to Pick a Centrifugal Pump Part 8: Motor Speed Considerations

How does RPM (revolutions per minute) impact pump operation? And what RPM is best suited for hydronic applications? A pump’s RPM or “synchronous speed” is determined by the number of magnetic poles in the motor winding as they interact with...

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