ABSTRACT
This chapter provides the basic definition of Low Delta T Syndrome and investigates some of the possible causes of it that result from lack of maintenance, and the ways of mitigating this problem. The maintenance tasks are described as part of energy centered maintenance model. Low Delta T Syndrome is almost a common problem in variable flow chilled water systems; Low Delta T is defined such that the actual difference between supply and return chilled water temperatures is less than the design value. Energy centered maintenance model focuses on the issues appear during the operation of the equipment and provides guidance on identifying the root-cause of the problem and the way to mitigate by conducting certain corrective and preventive actions. Lower Delta T Syndrome results from the inefficient use of chilled water at the building and plant side yielding a lower chilled water return temperature than the design value.
