The Theoretical Framework of the Modified Organic Rankine Cycles for Improved Energy and Exergy Performances

Zubair Ali Shah, Qun Zheng, Ghazanfar Mehdi, Naseem Ahmad, Waleed Raza, Aseed ur Rehman, Asif Raza

Abstract


Rapidly increasing of the energy crises, depletion of fossil fuels and its severe environmental hazards, demanded to establish the green processes. The best available solution is to convert low-grade waste heat into useful work by using the organic Rankine cycle (ORC), which reduces not only the energy shortage but also environmental problems simultaneously. This work presents the theoretical and numerical methodology using Engineering Equation Solver (EES) software to evaluate both energy and exergy analysis of the basic and three modified organic Rankine cycles. R-113 was used as a working fluid. The basic ORC system was modified by integrating internal heat exchanger, regeneration, and the combination of both. Among these four cycles, the ORC system integrating with both the internal heat exchanger and regeneration proved the best cycle, which gave the highest thermal efficiency (22.43%), exergy efficiency (33.82%), and lowest exergy destruction (44.5kW) at evaporator pressure of 2.5MPa. Furthermore, it has been concluded that the evaporator played a significant role in ORC system performance because its exergy destruction was maximum, which was enhanced by increasing its pressure.


Keywords


energy and exergy analysis; exergy destruction; internal heat exchanger; organic Rankine cycle; regeneration

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References


Zhang H., Guan H., Ding Y., and Liu C., 2018. Energy analysis of Organic Rankine Cycle (ORC) for waste heat power generation. Journal of Cleaner Production 183: 1207-1215.

Saadat-Targhi M. and S. Khanmohammad. 2019. Energy and exergy analysis and multi-criteria optimization of an integrated city gate station with organic Rankine flash cycle and thermoelectric generator. Applied Thermal Engineering 149: 312–324.

Feng Y., Hung T., He Y., Wanga Q., Wanga S., Li B., Lin J., and Zhang W., 2017. Operation characteristic and performance comparison of organic Rankine cycle (ORC) for low-grade waste heat using R245fa, R123, and their mixtures. Energy Conversion and Management 144: 153–163.

Kong R., Deethayat T., Asanakham A., Vorayos N., and Kiatsiriroat T., 2019. Thermodynamic performance analysis of an R245fa organic Rankine cycle (ORC) with different kinds of heat sources at evaporator. Case Studies in Thermal Engineering 13: 100385.

Wei F., Senchuang G., and Zhonghe H., 2019. Economic analysis of organic Rankine cycle (orc) and organic Rankine cycle with an internal heat exchanger (IORC) based on industrial waste heat source constraint. Energy Procedia 158: 2403–2408.

Rayegan R. and Y. Tao. 2011. A procedure to select working fluids for solar organic Rankine cycles (ORCs). Renewable Energy 36(2): 659–70.

Quoilin S., 2011. Sustainable energy conversion through the use of organic Rankine cycles for waste heat recovery and solar applications. Ph.D. thesis. Belgium: University of Liège, Wallonia, Belgium.

Braimakis K., Thimo A., and Karellas S., 2017. Techno-economic analysis and comparison of a solar-based biomass ORC-VCC system and a PV heat pump for domestic trigeneration. Journal of Energy Engineering 143(2): 04016048.

Quoilin S., Broek M.V.D., Declaye S., Dewallef P., and Lemort V., 2013. Techno-economic survey of organic Rankine cycle (ORC) systems. Renewable and Sustainable Energy Reviews 22: 168–86.

Astolfi M., Romano M.C., Bombarda P., and Macchi E., 2014. Binary ORC (Organic Rankine Cycles) power plants for the exploitation of medium–low-temperature geothermal sources – Part B: techno-economic optimization. Energy 66: 435–46.

Shokati N., Ranjbar F., and Yari M., 2015. Exergoeconomic analysis and optimization of basic, dual-pressure and dual-fluid ORCs and Kalina geothermal power plants: a comparative study. Renewable Energy 83: 527–42.

Braimakis K., Preißinger M., Brüggemann D., Karellas S., and Panopoulos K., 2015. Low-grade waste heat recovery with subcritical and supercritical organic Rankine cycle based on natural refrigerants and their binary mixtures. Energy 88: 80–92.

Mago P.J., Chamra L.M., and Somayaji C., 2006. Performance analysis of different working fluids for use in organic Rankine cycles. Proc. IMechE, Part A: J. Power and Energy 221: 255-264.

Roy J.P. and A. Misra. 2012. Parametric optimization and performance analysis of a regenerative organic Rankine cycle using R-123 for waste heat recovery. Energy 39: 227-235.

Xi H., Li M.-J., Xu C., and He Y.-L., 2013. Parametric optimization of regenerative organic Rankine cycle (ORC) for low-grade waste heat recovery using a genetic algorithm. Energy 58: 473-482.

Hung T.-Z., 2001. Waste heat recovery of organic Rankine cycle using dry fluids. Energy Conversion and Management 42: 539-553.

Shu G., Liu L., Tian H., Wei H., and Yu G., 2014. Parametric and working fluid analysis of a dual-loop organic Rankine cycle (DORC) used in engine waste heat recovery. Applied Energy 113: 1188–1198.

Long R., Bao Y., Huang X., and Liu W., 2014 Exergy analysis and working fluid selection of organic Rankine cycle for low grade waste heat recovery. Energy 73: 475-83.

Quoilin S., Declaye S., Tchanche B.F., and Lemort V., 2011. Thermo-economic optimization of waste heat recovery organic Rankine cycles. Applied Thermal Engineering 31(14): 2885–93.

Wei D., Lu X., Lu Z., and Gu J., 2008. Dynamic modeling and simulation of an organic Rankine cycle (ORC) system for waste heat recovery. Applied Thermal Engineering 28: 1216–1224.

Liu B.T., Chien K., and Wang C., 2004. Effect of working fluids on organic Rankine cycle for waste heat recovery. Energy 29: 1207–17.

Wang H.T., Wang H., Ge Z., and Leng T.T., 2011. Optimization of the low-temperature geothermal heat powered organic Rankine cycle. Ind. Heat. 3: 007.

Sun J. and W. Li. 2011. Operation optimization of an organic Rankine cycle (ORC) heat recovery power plant. Applied Thermal Engineering 31: 2032–2041.

Huan X., Ming-Jia L., Chao X., and Ya-Ling H., 2013. Parametric optimization of regenerative organic Rankine cycle (ORC) for low-grade waste heat recovery using genetic algorithm. Energy 58: 473–482.

Imran M., Park B.S., Kim H.j., Lee D.H., Usman M., and Heo M., 2014. Thermo-economic optimization of Regenerative Organic Rankine Cycle for waste heat recovery applications. Energy Conversion and Management 87: 107–118.

Mago P.J., 2008. An examination of regenerative organic Rankine cycle using dry fluids. Applied Thermal Engineering 28: 998–1007.

Li G., 2016. Organic Rankine cycle performance evaluation and thermoeconomic assessment with various applications part I: energy and exergy performance evaluation. Renewable and Sustainable Energy Reviews 53: 477–499.

Saleh B., Koglbauer G., Wendland M., and Fischer J., 2007. Working fluids for low-temperature organic Rankine cycles. Energy 32 (7): 1210–1221.

Uusitalo A., Honkatukia J., Turunen-Saaresti T., and Larjola J., 2014. A thermodynamic analysis of waste heat recovery from reciprocating engine power plants by means of Organic Rankine Cycle. Applied Thermal Engineering 70 (1): 33–41.

Dai Y.P., 2009. Exergy analysis, parametric analysis, and optimization for a novel combined power and ejector refrigeration cycle. Applied Thermal Engineering 29: 1983–1990.

Regulagadda P., Dincer I., and Naterer G.F., 2010. Exergy analysis of a thermal power plant with measured boiler and turbine losses. Applied Thermal Engineering 30: 970–976.

Aljundi I.H., 2009. Energy and exergy analysis of a steam power plant in Jordan. Applied Thermal Engineering 29: 324–328.

Gutiérrez S., 2013. Energy and exergy assessments of a lime shaft kiln. Applied Thermal Engineering 51: 273–280.

Desai N.B. and S. Bandyopadhyay. 2009. Process integration of organic Rankine cycle. Energy 34, 1674–1686.

Mago P.J., 2008. An examination of exergy destruction in organic Rankine cycles. International Journal of Energy Research 32: 926–938.

Arslan O. and O. Yetik. 2011. ANN-based optimization of supercritical ORC-Binary geothermal power plant: Simav case study. Applied Thermal Engineering 31: 3922–3928.

Badr, O., Ocallaghan, P.W., and Probert S.D., 1990. Rankine-cycle systems for harnessing power from low-grade energy-Sources. Applied Engineering 36: 263–292.

Gu W., Weng Y., Wang Y., and Zheng B., 2009. Theoretical and experimental investigation of an Organic Rankine Cycle for a waste heat recovery system. Part A: Journal of Power and Energy 223: 523–533.

Garg P.D., Dehiya S., Barasiya A., Rahangdale A., and Kumawat V.S., 2013. Exergy and efficiency analysis of combined cycle power plant. International Journal of Scientific & Engineering Research 4(12), ISSN 2229-5518.

Coplan C.C., 2005. Exergy analysis of combined cycle cooperation systems. M.S. thesis. Middle East Technical University, Ankara, Turkey.

Bejan A. 2002. Fundamentals of exergy analysis, entropy generation minimization and the generation of flow architecture. International Journal of Energy Research 26: 545-565.