Modern power generation technologies, such as organic Rankine cycle power systems,
require turboexpanders operating with high-efficiency and high power density. These …

There is recent focus on supercritical CO 2 (s-CO 2) Brayton power cycles as the next-
generation thermal energy conversion choice. They are efficient, compact, economic, and …

This paper outlines a novel meanline off-design model to predict the performance
characteristics of a radial inflow turbine that operates with ideal and real working fluids …

Sustainable and efficient refrigerants are essential due to increasing regulatory constraints
on traditional high-GWP refrigerants. This study investigates the potential of natural …

Several investigations related to increasing engine thermal efficiency focusing on the engine
hydraulic circuits (oil and coolant) were performed over the last years. According to …

Due to slow turnover of the global vehicle parc internal combustion engines will remain a
primary means of motive power for decades, so the automotive industry must continue to …

The combination of more strict regulation for pollutant and CO2 emissions and the new
testing cycles, covering a wider range of transient conditions, makes very interesting the …

The global push to reduce greenhouse gas emissions has led to the ban of high global
warming potential (GWP) refrigerants in the refrigeration sector, prompting the adoption of …

The turbo-expander system is utilized instead of the pressure regulator to avoid exergy
destruction occurring in gas pressure reduction systems. However, due to the variation of …

Due to the need to achieve a fast warm-up of the after-treatment system in order to fulfill the
pollutant emission regulations, a growing interest has arisen to adopt variable valve timing …