An evaporator inlet water temperature control system for controlling the inlet water temperature of an evaporator utilized in an inverter driven centrifugal chiller. The system creates the proper chilled water set point at the evaporator outlet needed to maintain the inlet water at its set point for...http://www.google.se/patents/US4282718?utm_source=gb-gplus-sharePatent US4282718 - Evaporator inlet water temperature control system