Typical silencer in heavy industrial compressor systems consist of pressure vessels with baffles filled with mineral wool or similar material. With the presented silencer the sound damping is achieved with an acoustic liner covered with a multi-layer steel wire mesh. This special material makes it possible to build optimized silencers with very good damping characteristic. The transmission loss is optimized according to the emission spectra of the compressor. The blocking of the free passage is reduced so that an inline configuration without an additional pressure vessel can be achieved. Tests were performed with an external sound source and with a 10 MW compressor as sound source. This paper summarizes the design of the silencer and a possibility for sound measurements with flow during a shop test.
This paper gives an overview of numerical and experimental investigations on super-critical CO2 flow through carbon floating ring seals (CRS). The established simulation model considers the real gas effect, temperature deformation and the shaft rotation. For validation extensive measurements of the leakage rates, pressures and temperatures at various positions within the seal were conducted on a compressor prototype. Details of the measurement setup and the test procedure are given. The experimental results are discussed. A comparison of the measured data to the model prediction shows an overall good agreement.
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