On mixtures as working fluids of air-cooled ORC bottoming power plants of gas turbines

The use of mixtures as working fluids of organic Rankine cycle (ORC) waste heat recovery (WHR) power plants has been proposed in the past to improve the matching between the temperature profile of the hot and the cold streams of condensers and evaporators, thus to possibly increase the energy conversion efficiency of the system. The goal of...

Hybrid electric powertrain for long-haul trucks and buses: Preliminary analysis of a new concept based on a combined cycle power plant

The electric hybridization of heavy-duty road vehicles is a promising alternative to reduce the environmental impact of freight and passengers transportation. Employing a micro gas turbine as a prime mover offers several advantages: high power density, fuel flexibility, ultra-low emissions (without the need of exhaust after-treatment), low...

Corrigendum to “Active subspaces for the optimal meanline design of unconventional turbomachinery” (Applied Thermal Engineering (2017) 127 (1108–1118), (S1359431117315466) (10.1016/j.applthermaleng.2017.08.093))

By means of this corrigendum, the authors would like to include relevant information regarding the validation of the meanline turbine model employed in the original article. The improvement regarding the validation of the model was made possible thanks to the contribution of Prof. Jürg Schiffmann. The additional results documented here...

Integrated Design Methods for Mini Organic Rankine Cycle Power Systems

The constant progress of humanity is inherently linked to an ever-increasing demand for energy. Coping with this demand by means of fossil-fuel power plants has lead to extensive environmental damage like global warming, destruction of natural habitats, and air pollution. In order to ensure the well-being of future generations, civilization must...

Active subspaces for the optimal meanline design of unconventional turbomachinery

The preliminary fluid dynamic design of turbomachinery operating with non-standard working fluids and unusual operating conditions and specifications can be very challenging because of the lack of know-how and guidelines. Examples are the design of turbomachinery for small-capacity organic Rankine cycle and supercritical CO₂ cycle...

Fluid-dynamic design and characterization of a mini-ORC turbine for laboratory experiments

High temperature Organic Rankine Cycles power systems of low power capacity, i.e. 3-50 kW_e, are receiving recognition for distributed and mobile energy generation applications. For this type of power plants, it is customary to adopt a radial-turbine as prime mover, essentially for their ability to cope with very large volumetric...

Active subspaces for the preliminary fluid dynamic design of unconventional turbomachinery

The fluid dynamic preliminary design of unconventional turbomachinery is customary done with meanline design procedures coupled with gradient-free optimizers. This method features various drawbacks, since it might become computationally expensive, and it does not provide design insights or guidelines to the designer. This work proposes a...