N2 - In the paper a research on cost-effective optimum design boiling
temperature for Organic Rankine Cycle utilizing low-temperature heat
sources is presented. The ratio of the heat exchanger area of the boiler
to the power output is used as the objective function. Analytical
relations for heat transfer area as well power of the cycle are
formulated. Evaporation temperature and inlet temperature of the heat
source medium as well its mass flow rate are varied in the optimization
method. The optimization is carried out for three working fluids, i.e. R
134a, water and ethanol. The objective function (economics profitability,
thermodynamic efficiency) leads to different optimal working conditions in
terms of evaporating temperature. Maximum power generation in the
near-critical conditions of subcritical ORC is the highest. The choice of
the working fluid can greatly affect the objective function which is a
measure of power plant cost. Ethanol exhibits a minimum objective function
but not necessarily the maximum cycle efficiency.
JO - Archives of Thermodynamics
L1 - http://rhis.czasopisma.pan.pl/Content/94339/PDF/02_paper.pdf
L2 - http://rhis.czasopisma.pan.pl/Content/94339
IS - No 3 October
EP - 35
KW - ORC
KW - Optimum design criteria
KW - Fluid selection
ER -
A1 - Mikielewicz, Dariusz
A1 - Mikielewicz, JarosÅ‚aw
PB - The Committee on Thermodynamics and Combustion of the Polish Academy of Sciences
JF - Archives of Thermodynamics
SP - 25
T1 - Optimal boiling temperature for ORC installation
UR - http://rhis.czasopisma.pan.pl/dlibra/docmetadata?id=94339
DOI - 10.2478/v10173-012-0015-y