APPLYING VARIABLE VOLUME PUMPIG

In the previous article published in the July-Sept. 1999 issue of Air Conditioning and Refrigeration Journal, "Variable, Volume Pumping Fundamentals," the concept of variable volume pumping is thoroughly developed. The example cited is a primary-secondary pumping system. Primary-Secondary pumping configurations are successfully applied by thousands worldwide and is the standard approach for many design engineers. To optimize system performance, the designer has a number of variations of basic primary-secondary pumping to explore.