|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Materials in Clean Power Systems IX: Durability of Materials
||Corrosion of Supercritical CO2 Turbomachinary Components
||Voramon Dheeradhada, Azam Thatte
|On-Site Speaker (Planned)
Concentrated solar power (CSP) plants using supercritical CO2 (sCO2) as the power cycle working fluid can potentially achieve high thermal conversion efficiency at low capital cost due to extremely compact turbo-machinery. A sCO2 expander and an improved heat exchanger are expected to provide major stepping stones for achieving CSP power at $0.06/kW-hr LCOE and increasing energy conversion efficiency >50%. Gas bearing (GB) and Dry gas seal (DGS) are two key components that are critical to the robust and highly efficient operation of future sCO2 power cycles.
Performance degradation and the life limiting mechanisms of GB and DGS operating in sCO2 environment are not well understood. Materials selection is critical for enabling the long-term performance of GB. Two of the alloys in consideration for GB and DGS applications are IN617 and IN718. This presentation will focus on material degradation of these two alloys in sCO2 at 250 bar and 550–750°C.
||Planned: A print-only volume