Open AccessNumerical Simulation of Turboexpander on Organic Rankine Cycle with Different Working Fluids
Author(s) -
Diki Ismail Permana,
Priyono Sutikno
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/694/1/012014
Subject(s) - organic rankine cycle , working fluid , refrigerant , environmental science , turboexpander , geothermal energy , renewable energy , geothermal gradient , petroleum engineering , turbine , degree rankine , brine , rankine cycle , process engineering , waste management , thermodynamics , waste heat , gas compressor , mechanical engineering , engineering , power (physics) , geology , heat exchanger , physics , electrical engineering , geophysics
Renewable energy is an alternative to overcome the energy crisis and dependence on fossil-fuel energy that has an environmental impact due to the greenhouse effect. Meanwhile, disadvantage of EBT is depend on weather periodically. Geothermal is a source of EBT that is independent with weather. Geothermal resources dominated by water (brine) can’t be directly utilized as a power generated, but it has to separated into water and steam phase. The high enthalpy owned by brine can still be utilized due to development of Organic Rankine Cycle. ORC uses organic refrigerant fluids or hydrocarbons as a working fluid because it has low boiling temperatures. The numerical simulation was analyzed using a CFD ANSYS CFX with turbulence model K-epsilon and Pentane, R245fa, and butane as a working fluids with expansion ratio 5:1 and rotational speed variation at 2000 until 14000 rpm.