Energy and exergy analysis of new refrigerant mixtures in an Organic Rankine Cycle for low temperature power generation

Abstract:

This paper presents and discusses the performance of environmentally- friendly refrigerant mixtures in an Organic Rankine Cycle (ORC) for power generation. The performance has been compared at low and medium waste heat temperatures to other organic and non-organic fluids. The refrigerant mixtures boil at extremely low temperatures and are capable of efficiently capturing waste heat at temperatures less than 27°C (80°F). The quaternary mixtures are fully HFCs and their compositions can be varied to best recover heat at temperatures up to 482°C (900°F). In this paper, energy and exergy analysis have been presented for the behaviour of the quaternary refrigerant mixtures and compared to other commonly used fluids. Results showed that at this range of heat source temperatures the refrigerant mixtures efficiently recover waste heat and produce power at efficiencies significantly higher than with other working fluids. The results also showed that other low temperature applications are possible and economically viable with the use of these quaternary refrigerant mixtures. © Ambient Press Limited 2010.

Año de publicación:

2010

Keywords:

Fuente:

scopus