April 10, 2017

How Water Behaves in Hydronic Systems

How Water Behaves in Hydronic Systems

by Mark Olson, CEO of Caleffi North America, Inc.
     as featured in HPAC Magazine
     February 2017 

Two common problems resulting from poor water quality are excessive corrosion and limescale accumulation. In Part I (HPAC, February 2017) we examine corrosion.  In Part II (HPAC, August 2017, we examine limescale).  The following is a closer look at corrosion.

Designers of modern hydronic systems strive for two important objectives: a reliable system and an energy efficient system. Achieving these requires proper equipment selection as well as attention to water quality. Unfortunately the latter is often overlooked, or left to the discretion of the installer, who may or may not appreciate its importance.

The two primary problems that can result from poor water quality are excessive corrosion and lime-scale accumulation. Both shorten equipment life and reduce energy efficiency.

No two systems are alike, which makes hydronic water chemistry an inexact science. Still, a basic understanding of how water behaves in a closed hydronic system can help the designer weigh options and determine appropriate water quality requirements.

In this article, we will discuss corrosion. Lime scale corrosion will be examined in a future article.

Read the full article as featured in HPAC.

Last modified: 
April 28, 2021
Hydronic PrinciplesMagnetic SeparationArticlesWater Quality
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