Primary-Only vs. Primary-Secondary Variable Flow Systems

Several articles over the last several years have extolled the virtues of primary-only variable flow chilled water pumping systems com- pared to the conventional primary-secondary pumping system. One article¹ even predicts the demise of primary-secondary systems. While there is no question that the primary-only system has many advantages, the primary-secondary system may still be preferable for some applications.

Citation: ASHRAE Journal, vol. 44, no. 2, February 2002



Product Code(s): D-5956

This product is related to: Optimizing Design and Control of Chilled Water Plants: Part 5: Optimized Control Sequences
Optimizing Design and Control of Chilled Water Plants Part 1: Chilled Water Distribution System Selection