Enhanced Cascade Cycle orc2019 Tracking Number 169Presentation: Session: Session 6B: System Design - Cycle configurations Room: Attica Session start: 09:00 Wed 11 Sep 2019 Roberto Bini giulia.bonifazi@turboden.it Affifliation: turboden Davide Colombo giulia.bonifazi@turboden.it Affifliation: turboden Claudio Pietra giulia.bonifazi@turboden.it Affifliation: turboden Topics: - System Design and Optimization (Topics), - Oral Presentation (Preferred Presentation type) Abstract: Two level pressure ORC cycles (also known as cascade cycles) has been realized for 30 years as a solution to increase the conversion efficiency of large geothermal plants or, in other words, to increase the power output of a certain geothermal resource, by realizing a thermodynamic cycle that better couples with the cooling of the resource. An improvement of this well-known cycle is proposed which allows to further increase the conversion efficiency by introducing an additional intermediate pressure level. Two alternatives are presented to exploit the additional vapour flow, showing the efficiency increase achievable for a given typical application and also reporting some considerations about the cost effectiveness of this solution. |