The application of oil-free-integrated motor-compressors has become increasingly popular in recent years. One of the significant features of this class of machinery is compactness, providing space-savings compared to traditional-oil-lubricated compressors with associated gearboxes and lubrication systems. The integration of a turbo separator with such a compressor has resulted in the creation o...

Vapor compression heat pump is an important aerospace thermal control means to lunar probe program and deep space exploration. Compressors are the most important component in vapor compression heat pump systems. Microgravity environment has a great impact on system performance. The paper tests the gravity independence of compressor performance, and evaluates the performance of compressor and he...

Maintenance is crucial to ensuring and improving system dependability: By performing timely inspections, repairs, and renewals the lifespan and reliability of systems can be significantly improved. Good maintenance planning, however, has to balance these improvements against the downsides of maintenance, such as costs and planned downtime. In this paper, we study the effect of different mainten...

♦ Corresponding Author, Chief Technology Officer: [email protected] ABSTRACT Ramgen Power Systems, Inc. (RPS) is developing a family of high performance supersonic compressors that combine many of the aspects of shock compression systems commonly used in supersonic flight inlets with turbo-machinery design practices employed in conventional axial and centrifugal compressor design. The result i...

A numerical optimization of the suction valve of a large reciprocating compressor has been carried out as a case study, using a combination of a compressor simulation program and a genetic optimization algorithm. This optimization algorithm is based on the theory of biological evolution: survival of the fittest. The compressor simulation program solves the mass and energy conservation laws for ...

The verbose nature of XML has been mulled over again and again and many compression techniques for XML data have been excogitated over the years. Some of the techniques incorporate support for querying the XML database in its compressed format while others have to be decompressed before they can be queried. XML compression in which querying is directly supported instantaneously with no compromi...