PERFORMANCE STUDY OF A SCROLL EXPANDER WITH AMMONIA-WATER asme-orc2015 Tracking Number 174Presentation: Session: Poster session Plenary session Session start: 13:30 Tue 13 Oct 2015 James Muye jamesmuye.mwangome@urv.cat Affifliation: Universitat Rovira i Virgili, Tarragona Juan Carlos Bruno juancarlos.bruno@urv.cat Affifliation: Universitat Rovira i Virgili, Tarragona Rajagopal Saravanan rsaravanan@annauniv.edu Affifliation: Anna University, Chennai Alberto Coronas alberto.coronas@urv.cat Affifliation: Universitat Rovira i Virgili, Tarragona Topics: - Volumetric Expanders (Topics), - I prefer Poster Presentation (Presentation Preference) Abstract: This paper examines the performance of an open drive scroll compressor modified to work as an expander operating on ammonia-water working medium. The modelling and simulation of the scroll expander is carried out with EES program. In this study a simulation of the expander performance at various pressure ratios (2-4), expander speeds (2500-7500 rpm) and ammonia concentrations (0.8-0.99) at a constant supply pressure (5 bar) and temperature (105oC) has been presented. The scroll expander produced a work output of 0.29 to 1.5 kW, with isentropic efficiencies of between 0.48-0.64. At the assumed in let conditions, the optimum expansion ratio for the expander is 3. |