CHILLER PLANT OPTIMIZATION: IMPROVING ON VARIABLE PRIMARY FLOW CHILLED WATER SYSTEM OPERATION

摘要

Optimizing any cooling plant for mini- mal energy consumption is a demand- ing science. In many cases, minimiz- ing chiller plant energy consumption requires modifications to the plant design, including refinement of con- trol algorithms to assure optimal plant performance. In this article, we will show how further energy savings can be obtained from an efficient variable primary flow chilled water (VPFCHW) system by actively compensating for system changes when operating at capacities less than design load. The discussion will be centered on countering the effects of VPFCHW central plant imbalance, single-setpoint chilled water pump differential pressure control, and condenser water pump operating pressure and flow.