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The article focuses on the challenges and advancements in developing a MW-scale compressor for supercritical Carbon Dioxide (CO2) power cycles. Topics include the implications of real gas behavior near the critical point, the design and testing of the compressor prototype, and the potential of supercritical CO2 power cycles in energy transition scenarios, emphasizing efficiency, reduced water consumption, and lower greenhouse gas emissions.

The article focuses on the importance of adequate lubricant film thickness to keep the operation of oil and grease-lubricated bearings trouble-free. It states how a minimum film thickness for journal bearings can be estimated. Film thickness decline by 30% if the load increases but it remains constant when the speed or viscosity is raised. It recommends to adopt high degree of pressure and viscosity oil to reduce fatigue.

Presents ways to prevent problems on journal bearings. Effects of elevated operating temperatures on bearings, seals and shafting; Limitations on temperature of bearing materials; Calculation of bearing peak temperatures; Importance of film thickness in oil-fed bearings.

Discusses the potential use of foil air bearings in land-based turbomachinery. Principle of an air bearing; Details on foil journal air bearing and thrust bearing; Analysis and testing of foil air bearings; Applications of foil air bearings.

Discusses the correct installation and maintenance of fluid-film and journal bearings. Step to identify bearing failure and its cause; Common types of bearing damage; Tips on how to choose a reliable repair facility. INSET: Choosing a reliable repair facility.

Focuses on composite journal bearings, a type of bearing that can operate without external lubrication. Classification of journal bearing materials; Methods by which journal bearings self-lubricate; Tips on specifying journal bearings.

Interviews Bernard Harris, research engineer and manager at Rexnord Inc. Information on the journal bearing; Main reason for using the journal bearing; Significant developments in journal bearings.