Chiller Plant Optimization Case Study Facility: Hospital Facility Issues / Concerns: Their 400-ton constant speed centrifugal chiller #4 operates at considerably less design capacity than the 750 ton chiller #5 when these two are operating together. The low load operating condition of the 400-ton chiller causes loud and unstable conditions, and a surge condition. The Hospital wants to correct the chiller plant problems and increase energy efficiency. Analysis: When both centrifugal chillers are operating, the 750-ton chiller return temperature is the same as the return secondary water temperature, but at the same time the return water temperature to the 400-ton chiller is at a lower mixed water temperature. This condition causes the 400-ton chiller to operate

Join for free to read