Exergy analysis and performance enhancement ofisopropanol-acetone-hydrogen chemical heat pump

Abstract

Exergy loss analysis was conducted to identify the irreversibilityin each component of the isopropanol-acetone-hydrogen chemical heatpump (IAH-CHP). The results indicate that the highest irreversibilityon a system basis occurs in the distillation column. Moreover, theeffect of operating parameters on thermodynamic performances of theIAH-CHP was studied and the optimal conditions were obtained. Finally,the potential methods to reduce the irreversibility of the IAH-CHPsystem were investigated. It is found that reactive distillation isapromising alternative. The enthalpy and exergy efficiency of theIAH-CHP with reactive distillation increases by 24.1% and 23.2%, respectively.

Keywords

waste heat reuse / chemicalheat pump / exergy analysis / isopropanol

References

[1] Spoelstra S, Haije  W G, Dijkstra  J W. Techno-economic feasibility of high-temperature high-lift chemical heat pumps for upgrading industrialwaste heat. Applied Thermal Engineering, 2002, 22(14): 1619–1630

[2] Gandia L M, Montes  M. Effect of the design variables on the energy performance and size parametersof a heat transformer based on the system acetone/H₂/2-propanol. International Journal ofEnergy Research, 1992, 16(9): 851–864

[3] Kim T G, Yeo  Y K, Song  H K. Chemical heat pump based on dehydrogenationand hydrogenation of i-propanol and acetone. International Journal of EnergyResearch, 1992, 16(9): 897–916

[4] Chung Y, Jeong  H K, Song  H K, Park  W H. Modelling and simulation of the chemical reaction heat pump systemadopting the reactive distillation process. Computers & Chemical Engineering, 1997, 21: S1007–S1012

[5] KlinSoda I, Piumsomboon  P. Isopropanol-Acetone-Hydrogen chemical heat pump: a demonstrationunit. Energy Conversion and Management, 2007, 48(4): 1200–1207

[6] Esen H, Inalli  M, Esen M,  Pihtili K. Energy and exergy analysis of a ground-coupled heat pump system withtwo horizontal ground heat exchangers. Building and Environment, 2007, 42(10): 3606–3615

[7] OzgenerO, Hepbasli A. A review on the energy and exergy analysis of solar assisted heat pumpsystems.Renewable & Sustainable EnergyReviews, 2007, 11(3): 482–496 doi:10.1016/j.rser.2004.12.010

[8] Xu M, Xin  F, Li X,  Huai X, Guo  J, Liu H. Equilibrium model and performances of Isopropanol-Acetone-Hydrogenchemical heat pump with reactive distillation column. Industrial & Engineering Chemistry Research, 2013, 52(11): 4040–4048

[9] Kato Y, Nakagawa  N, Kameyama H. Study of Chemical heat pumpwith reaction couple of acetone hydrogenation/2-propanol dehydrogenation:kinetics of the hydrogenation of acetone. Kagaku Ronbunshu, 1987, 13(5): 714–717

Rights & permissions

Higher Education Press and Springer-Verlag GmbHGermany