Organic Rankine Cycle (ORC) enables power generation from lowto medium temperature heat sources. In an ORC, the organic medium shows different performances for different heat source temperatures. For a range of heat source temperatures, one temperature can be always identified corresponding to the best thermal match between the heat transfer fluid and working fluid. This temperature is defined ...

Recently proposed organic flash cycles maintain lower irreversibility in the evaporator than traditional Rankine cycles. This study presented a novel combined heat and power system that was based on regenerative cycle, order to improve thermal efficiency. Parametric analyses for were carried out, using six working fluids, performed with source temperatures sink ranged from 130 °C 170 °C, 20 40 ...

Organic Rankine cycle (ORC) systems are some of the most suitable technologies to produce electricity from low-temperature waste heat. In this study, a non-regenerative, micro-scale ORC system was tested in off-design conditions using R134a as working fluid. The experimental data were then used tune semi-empirical models main components system. Eventually, component-oriented solver map electric...

This paper introduces the concept of installing a small-scale organic Rankine cycle system for the generation of electricity in remote areas of developing countries. The Organic Rankine Cycle Systems (ORC) system uses a commercial magnetically-coupled scroll expander, plate type heat exchangers and plunger type working fluid feed pump. The heat source for the ORC system can be solar energy. A s...

The presented work analyses the design space and performance potential of microfabricated Brayton cycle and Rankine cycle devices, accounting for lower component efficiencies, temperatures limited by the material properties and system implementation constraints imposed by silicon microfabrication and miniaturization. By exploring the design space of such microsystems, their potential thermal ef...

In this paper a PI based adaptive control system is developed to control an organic Rankine cycle power plant. In particular, the control of the turbine speed during the transient between the normal operation mode of the system (connected to the grid) and the islandmode (connected to a stand-alone load) is of main concern. A control algorithm suitable for the implementation on a programmable lo...