Abstract:
In this study, modeling and thermodynamic analysis of an
Organic Rankine Cycle using geothermal heat source in Aydın,
Turkey has been made and optimum operation conditions were
determined by developing simulation software. The model has
been validated using an existing study. In consequence, the
differences between existing study data and the model seems
reasonable close, so the model was verified. Simulation of
model has been made by using EES software. In simulation the
effect of minimum and maximum pressure and working fluid
changes to the system performance has been investigated. ORC
using working fluids R141b and R123 and Isopentane has been
simulated for selected input values separately. Because of using
Isopentane caused geothermal re-injection temperature decrease
to inconvenient level, it has not been used as working fluid in
simulation. For R141b and R123, maximum and minimum
pressure values have been changed from 500 kPa to 3500 kPa
and from 100 kPa to 300 kPa, respectively. 2331 kW of net
work obtained at 3184 kPa maximum pressure and 2749 kW of
net work obtained at 100 kPa minimum pressures for R141b.
For R123, 1798 kW of net work obtained at 3184 kPa
maximum pressure and 2119 kW of net work obtained at 100
kPa minimum pressures. It has been seen that reducing
minimum pressure effects net work more than increasing
maximum pressure and R141b has a better performance than
R123, especially in the way of net work production.
Description:
Papers presented to the 12th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Costa de Sol, Spain on 11-13 July 2016.
