Loading...
Skiadopoulos, Tasos
Email Address
Birth Date
Research Projects
Organizational Units
Last Name
Skiadopoulos
First Name
Tasos
Name
Tasos Skiadopoulos
Now showing 1 - 1 of 1
- Results Per Page
- Sort Options
Optimization of a Partially Evaporating Organic Rankine Cycle with thermal non-equilibrium expansion.van Heule, Xander; Skiadopoulos, Tasos; Manolakos, Dimitris; De Paepe, Michel; Lecompte, StevenThe Trilateral Flash Cycle (TFC) is an alternative to the Organic Rankine Cycle (ORC). The TFC have been shown to have greater exergy efficiencies compared to the ORC in low-grade heat-to-power conversion. This is a result of the more efficient heat transfer from the heat carrier to the working fluid, even though the TFC has inherently a lower thermal efficiency. However, these results are based on cycle modeling assuming equilibrium conditions, but the actual two-phase expansion process is a nonequilibrium process. Thermal non-equilibrium between vapour and liquid occurs during the evaporation (or flashing) of the working fluid during the two-phase expansion process. The liquid phase has a temperature greater than the corresponding pressure’s saturation temperature and the equilibrium assumption overestimates the actual vapour quality. In a previous work, this non-equilibrium expansion was modeled and predicted based on the homogeneous relaxation model (HRM). In this work, the impact of the non-equilibrium process on the efficiency of the TFC is investigated and compared to the equilibrium model. The overall power recuperation is around 86% lower when including the thermal non-equilibrium nature of the expansion process. Therefore, the thermodynamic non-equilibrium losses should thus be incorporated when predicting the performance of a TFC.
