How to Determine Control Head for a Variable Speed Pumping System

How to Determine Control Head for a Variable Speed Pumping System

To control a variable speed pumping system, we must determine the minimum operational head of the system. Some refer to this value as constant head, minimum head, independent head, etc. Throughout this and in other JMP blogs, we refer to it as ...

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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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