Publication

Bond Graph Model Representation of a New Reciprocating Finned Air Compressor

Alfred Rufer, Mahbod Heidari
2014
Conference Papers

Abstract

A new finned reciprocating air compressor model is developed recently for compressed air energy storage. First the mechanism of operation of the new compressor is described. The complexity of the design encouraged us to develop the model based on the bond graph representation of a model developed earlier by Karnopp (2000) for a classic compressor. The new finned compressor model is detached to thermal and pneumatic bonds. Compressing chambers in the new compressor were treated as interconnecting cylinder heads with heat transfer interaction with neighboring chambers through their common walls. The simulation was done and compared to a classic piston with the same characteristics followed by an experimental verification.

Official source

https://infoscience.epfl.ch/entities/publication/628a2c8c-bae9-4350-a427-4241cb3ab1d2

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Alfred Rufer, Mahbod Heidari
2014
Conference Papers

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/628a2c8c-bae9-4350-a427-4241cb3ab1d2

About this result

Related concepts (27)

Compressor

A compressor is a mechanical device that increases the pressure of a gas by reducing its volume. An air compressor is a specific type of gas compressor. Compressors are similar to pumps: both increase the pressure on a fluid and both can transport the fluid through a pipe. The main distinction is that the focus of a compressor is to change the density or volume of the fluid, which is mostly only achievable on gases. Gases are compressible, while liquids are relatively incompressible, so compressors are rarely used for liquids.

Centrifugal compressor

Centrifugal compressors, sometimes called impeller compressors or radial compressors, are a sub-class of dynamic axisymmetric work-absorbing turbomachinery. They achieve pressure rise by adding energy to the continuous flow of fluid through the rotor/impeller. The equation in the next section shows this specific energy input. A substantial portion of this energy is kinetic which is converted to increased potential energy/static pressure by slowing the flow through a diffuser.

Compressed-air energy storage

Compressed-air energy storage (CAES) is a way to store energy for later use using compressed air. At a utility scale, energy generated during periods of low demand can be released during peak load periods. The first utility-scale CAES project has been built in Huntorf, Germany, and is still operational. The Huntorf plant was initially developed as a load balancer for fossil fuel-generated electricity, the global shift towards renewable energy renewed interest in CAES systems, to help highly intermittent energy sources like photovoltaics and wind satisfy fluctuating electricity demands.

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