TY - JOUR
T1 - Selection of a suitable working fluid for a combined organic Rankine cycle coupled with compression refrigeration using molecular approaches
AU - González, Johan
AU - Llovell, Fèlix
AU - Garrido, José Matías
AU - Quinteros-Lama, Héctor
N1 - Publisher Copyright:
© 2023 Elsevier B.V.
PY - 2023/9
Y1 - 2023/9
N2 - A vapor compression refrigeration cycle (VCRC) driven by an organic Rankine cycle (ORC) is an alternative to generating cold through a renewable energy source such as solar, residual thermal, and geothermal energy. The system analyzed in this work consists of an ORC coupled with a VCRC by a shaft where each one of the cycles uses an independent working fluid. This manuscript analyses 8 working fluids resulting in 16 combinations. These fluids include common refrigerants, such as R22 (HFCF) and R134a (HFC), with other low or null global warming potential (GWP) substances, such as hydrocarbons (HCs) and hydrofluoroolefins (HFOs). The PC-SAFT EOS is used as a predictive tool to obtain the equilibrium condition and thermophysical properties at each point in the cycle. The choice of the best combination of working fluids is done under the criteria that the ORC boiler and evaporator temperatures work in a range of 60.0 to 100.0 °C and −15.0 to 0.0 °C, respectively. The compressor outlet temperature, the VCR-ORC system Coefficient of Performance (COP), and the VCRC COP are the selected key parameters analyzed. The results show that the combination of n-pentane and R1233zd provide a good performance in terms of COP compared to other refrigerants.
AB - A vapor compression refrigeration cycle (VCRC) driven by an organic Rankine cycle (ORC) is an alternative to generating cold through a renewable energy source such as solar, residual thermal, and geothermal energy. The system analyzed in this work consists of an ORC coupled with a VCRC by a shaft where each one of the cycles uses an independent working fluid. This manuscript analyses 8 working fluids resulting in 16 combinations. These fluids include common refrigerants, such as R22 (HFCF) and R134a (HFC), with other low or null global warming potential (GWP) substances, such as hydrocarbons (HCs) and hydrofluoroolefins (HFOs). The PC-SAFT EOS is used as a predictive tool to obtain the equilibrium condition and thermophysical properties at each point in the cycle. The choice of the best combination of working fluids is done under the criteria that the ORC boiler and evaporator temperatures work in a range of 60.0 to 100.0 °C and −15.0 to 0.0 °C, respectively. The compressor outlet temperature, the VCR-ORC system Coefficient of Performance (COP), and the VCRC COP are the selected key parameters analyzed. The results show that the combination of n-pentane and R1233zd provide a good performance in terms of COP compared to other refrigerants.
KW - Fourth-generation refrigerants
KW - Hydrocarbons
KW - Organic Rankine cycle (ORC)
KW - Vapor compression refrigeration cycle (VCRC)
UR - http://www.scopus.com/inward/record.url?scp=85159165188&partnerID=8YFLogxK
U2 - 10.1016/j.fluid.2023.113847
DO - 10.1016/j.fluid.2023.113847
M3 - Article
AN - SCOPUS:85159165188
SN - 0378-3812
VL - 572
JO - Fluid Phase Equilibria
JF - Fluid Phase Equilibria
M1 - 113847
ER -