Primary-Only vs. Primary-Secondary Variable Flow Systems
نویسنده
چکیده
Steven T. Taylor, P.E., is a principal of Taylor Engineering in Alameda, Calif. He is a former member of ASHRAE Standing Standards Project Committee (SSPC) 90.1 and former chairman of SSPC 62.1. everal articles over the last several years have extolled the virtues of primary-only variable flow chilled water pumping systems compared 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.
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