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Experiment has been carried out on a two-phase air turboexpander under pre-cooling operation in order to enhance the efficiency of expander working in two-phase state. The temperature at the inlet of turboexpander is controlled through regulating the heat transfer rate of front heat exchanger. The outlet temperature, rotating speed and thermodynamic efficiency of the tested turboexpander with respect to inlet temperature have been instrumented and studied. When the turboexpander stepped into two-phase state, the outlet temperature tends towards stability which is independent with air inlet temperature. The isotropic efficiency of turboexpander with relative low liquid ratio maintains a high level and a system hysteresis shows up in the experiment. The working principle of turboexpander transiting from single phase to two phases has been investigated which may provides more reliable design criteria for turboexpanders working in two-phase.
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- Original title: Experimental investigation on the thermodynamic performance of turbo-expander in two phases.
- Record ID : 30007021
- Languages: English
- Source: Cryogenics 2012. Proceedings of the 12th IIR International Conference: Dresden, Germany, September 11-14, 2012.
- Publication date: 2012/09/11
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