Mungari 4.2 Process Plant Expansion — SAG Mill Chiller Package

QEG was engaged by GR Engineering Services (GRES) for Evolution Mining's Mungari 4.2 Process Plant Expansion Project to design, supply and pre-fabricate the SAG Mill Chiller Package (CP047). The scope comprised a Midea SCAF275HV(FCI) air-cooled VFD screw chiller (831 kW at 47 °C ambient) with integrated indirect free-cooling for the cold Goldfields nights, a Danfoss Sondex S22-IG16 plate heat exchanger separating the closed potable-water chilled loop from the open process cooling loop, dual duty/standby Wilo twin-head pump sets for both primary and secondary circuits, buffer and expansion tanks, automatic refill unit, BMS-integrated control panel and associated stainless-steel skid pipework. The package was fully prefabricated, FAT-tested and commissioning-trialled at QEG's Sydney workshop before being delivered DAP to the Mungari Project Site and commissioned through to acceptance in March 2025, providing reliable cooling water at 15-18 °C to the SAG mill motor, VSD, motor bearing lubrication unit, gearbox lube skid and trunnion bearing lube skid (combined ~798-878 kW heat load).