Eventos Anais de eventos
ENCIT 2018
Brazilian Congress of Thermal Sciences and Engineering
SIMULATION OF A SMALL SCALE ORGANIC RANKINE CYCLE
Submission Author:
Guilherme Scagnolatto , SP
Co-Authors:
Guilherme Scagnolatto, Cristiano Tibiriçá, Luben Cabezas Gómez, RICHARDSON LEANDRO NUNES
Presenter: Guilherme Scagnolatto
doi://10.26678/ABCM.ENCIT2018.CIT18-0554
Abstract
Due to environmental issues and energetic concerns, specially, increasing energetic demand in the coming years and fossil fuels sources depletion, different technologies have been studied in the attempt to make energetic sector more sustainable and efficient. In this context, organic Rankine cycle (ORC) – modification of the traditional steam Rankine cycle (SRC) that replaces water vapor as working fluid by an organic fluid, which has lower boiling temperature and higher vapor pressure, when compared to water – rises as a promising technology for electricity generation from low temperature heat sources, that could be supplied from renewable energy sources and waste heat from industrial processes or energy conversion. This paper aims to model a low scale ORC (10 kW), considering different fluids and operational conditions to investigate the cycle responses. The results are compared to some experimentally obtained values from the literature. Among the main tested working fluid candidates, isobutene and isopentane (hydrocarbons), R123 (HCFC), R11 (CFC) and R245fa (HFC) provided the higher cycle efficiency. R123 was considered as working fluid to compare cycles with and without heat regenerator. Also, the influence of heat source temperatures was investigated.
Keywords
Organic Rankine Cycle, renewable energy, energy efficiency
