Variable Speed Pump Control: Area Control Versus Curve Control

Variable Speed Pump Control: Area Control Versus Curve Control

In our last blog, we left you with two new terms, “Control Curve” and “Control Area,” indicating that any variable speed control strategy will be based on one or the other. What are these strategies and how do they differ?  Before we pull out the curves, schematics and calculations, let’s start with a simple analogy...

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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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Heads up on ASHRAE 90.1 - 2013 and Its Impact on Commercial HVAC Design!

The Department of Energy (DOE) released a statement last month saying that ANSI/ASHRAE/IES Standard 90.1 - 2010 Energy Standard for Buildings Except Low-Rise Residential Buildings offers 8.5% source energy savings and 7.6% site energy savings over the 2010 version. That’s enough to warrant another round of changes to commercial building codes. State governments now officially have until September 26, 2016....
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No More Constant Speed Pressure Boosting Under ASHRAE 90.1 - 2010

By Mark Bingham

“Constant speed pressure boosters are DEAD and GONE TO HEAVEN!”

That was the prevailing message recently from Chris Edmondson, CEO of JMP, as he briefed the folks here at about the upcoming mandatory changes under SECTION 10.4 of the new ASHRAE 90.1 – 2010.

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Federal Buildings To Comply with ASHRAE 90.1-2010 – Just Like the Rest of Us!

By Chad Edmondson

It’s only a matter of weeks before new commercial buildings codes must comply (or state’s must a request for extension) with ASHRAE 90.1 -2010, as we reported in an earlier blog.  And it looks like federal buildings will also have to follow suit too – albeit a little later

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