[1] 	"Fossil fuel consumption, World," [Online]. Available: https://ourworldindata.org/grapher/fossil-fuel-consumption-by-type.
[2] 	K. Gioietta, "When Fossil Fuels Run Out, What Then?," [Online]. Available: https://mahb.stanford.edu/library-item/fossil-fuels-run/.
[3] 	E. H. Wang, H. G. Zhang, B. Y. Fan, M. G. Ouyang, Y. Zhao, Q. H. Mu, "Study of Working Fluid Selection of Organic Rankine Cycle (ORC) for Engine Waste Heat Recovery," Energy, vol. 36, no. 5, p. 3406 – 3418, May 2011. 
[4] 	L. Baker, "Combined heat and power cogeneration can ensure consistency and save energy," December 2019. [Online]. Available: https://www.foodengineeringmag.com/articles/98624-combined-heat-and-power-cogeneration-can-ensure-consistency-and-save-energy.
[5] 	"WASTE HEAT TO POWER SYSTEMS," United States Environmental Protection Agency, [Online]. Available: https://www.epa.gov/sites/default/files/2015-07/documents/waste_heat_to_power_systems.pdf.
[6] 	H. Jouhara, N. Khordehgah, S. Almahmoud, B. Delpech, A. Chauhan,S. A. Tassou, "Waste Heat Recovery Technologies and Applications," Thermal Science and Engineering progress, vol. 6, p. 268 - 289, June 2018. 
[7] 	V. Zare, S. M. S. Mahmoudi, "A Thermodynamic Cmparison between Organic Rankine and Kalina cycles for Waste Heat Recovery from the Gas Turbine - Modular Heium Reactor," Energy, vol. 79, p. 398 - 406, January 2015. 
[8] 	X. Hou, H. Zhang, F. Yu, H. Liu, F. Yang, Y. Xu, Y. Tian, G. Li, "Free Piston Expander-Linear Generator Used for Organic Rankine Cycle Waste Heat Recovery System," Applied Energy, vol. 208, p. 1297 – 1307, December 2017. 
[9] 	S. Saghlatoun, W. Zhuge, Y. Zhang, "Review of Expander Selection for Small-Scale Organic Rankine Cycle," American Society of Mechanical Engineers, vol. 1, no. B, 2014. 
[10] 	O. Dumont, A. Parthoens, R. Dickes, V. Lemort, "Experimental Investigation and Optimal Performance Assessment of Four Volumetric Expanders (Scroll, Screw, Piston and Roots) Tested in a Small-Scale Organic Rankine Cycle System," Energy, vol. 165, p. 1119 - 1127, December 2018. 
[11] 	F. Alshammari, U. Muhammad, A. Pesyridis, "Expanders for Organic Rankine Cycle Technology," in Organic Rankine Cycle Technology for Heat Recovery, E. Wang, Ed., InTech, 2018. 
[12] 	F. Heberle, M. Preißinger, D. Brüggemann, "Zeotropic Mixtures as Working Fluids in Organic Rankine Cycles for Low-Enthalpy Geothermal Resources," Renewable Energy, vol. 37, no. 1, p. 364 – 370, January 2012. 
[13] 	J. Bao, L. Zhao, "A Review of Working Fluid and Expander Selections for Organic Rankine Cycle," Renewable and Sustainable Energy Reviews, vol. 24, p. 325 – 342, August 2013. 
[14] 	C. He, C. Liu, H. Gao, H. Xie, Y. Li, S. Wu, J. Xu, "The Optimal Evaporation Temperature and Working Fluids for Subcritical Organic Rankine Cycle," Energy, vol. 38, no. 1, p. 136 – 143, February 2012. 
[15] 	S. Gequn, Y. Gao, H. Tian, H. Wei, X. Liang, "Study of Mixtures Based on Hydrocarbons Used in ORC (Organic Rankine Cycle) for Engine Waste Heat Recovery," Energy, vol. 74, p. 428 – 438, September 2014. 
[16] 	Y. Lu, A. P. Roskilly, L. Jiang, L. Chen, Y. Xiaoli, "Analysis of a 1 KW Organic Rankine Cycle Using a Scroll Expander for Engine Coolant and Exhaust Heat Recovery," Frontiers in Energy, vol. 11, no. 4, p. 527 – 534, December 2017. 
[17] 	Y. A. Cengel, M. A. Boles, Thermodynamics: An engineering approach, McGraw Hill, 2008. 
[18] 	X. Zhang, M. He, Y. Zhang, "A Review of Research on the Kalina Cycle," Renewable and Sustainable Energy Reviews, vol. 16, no. 7, p. 5309 – 5318, September 2012. 
[19] 	A. F. Babatunde, O. O. Sunday, "A Review of Working Fluids for Organic Rankine Cycle (ORC) Applications," in IOP Conference Series: Materials Science and Engineering, September 10, 2018. 
[20] 	Z. Li, L. Yiji, H. Yuqi, Q. Gao, C. Fenfang, Y. Xiaoli, A. Roskilly, "Comparison Study of Trilateral Rankine Cycle, Organic Flash Cycle and Basic Organic Rankine Cycle for Low Grade Heat Recovery," in Energy Procedia, 2017. 
[21] 	M. Yari, A. S. Mehr, V. Zare, S. M. S. Mahmoudi, M. A. Rosen, "Exergoeconomic Comparison of TLC (Trilateral Rankine Cycle), ORC (Organic Rankine Cycle) and Kalina Cycle Using a Low Grade Heat Source," Energy, vol. 83, p. 712 - 722, April 2015. 
[22] 	G. Persico, M. Pini, "Fluid Dynamic Design of Organic Rankine Cycle Turbines," in Organic Rankine Cycle (ORC) Power systems, Woodhead Publishing, 2017, p. 253 – 297.
[23] 	S. Emhardt, G. Tian, J. Chew, "A Review of Scroll Expander Geometries and Their Performance," Applied Thermal Engineering, vol. 141, p. 1020 – 1034, August 2018. 
[24] 	B. Peng, B. Zhu, V. Lemort, "Theoretical and Experimental Analysis of Scroll Expander," in International Compressor Engineering Conference, 2016. 
[25] 	J.F. Oudkerk, R. Dickes, O. Dumont, V. Lemort, "Experimental Performance of a Piston Expander in a Small- Scale Organic Rankine Cycle," in IOP Conference Series: Materials Science and Engineering, August 10, 2015. 
[26] 	M. Imran, M. Usman, "Mathematical Modelling for Positive Displacement Expanders," in Positive Displacement Machines, Academic Press, 2019, p. 293 – 343.
[27] 	Y. Wang, L. Chen, B. Jia, A. P. Roskilly, "Experimental Study of the Operation Characteristics of an Air-Driven Free-Piston Linear Expander," Applied Energy, vol. 195, p. 93 – 99, June 2017. 
[28] 	S. Douvartzides, I. Karmalis, "Working Fluid Selection for the Organic Rankine Cycle (ORC) Exhaust Heat Recovery of an Internal Combustion Engine Power Plant," in IOP Conference Series: Materials Science and Engineering, November 2016. 
[29] 	"How do CFCs destroy the ozone layer?," [Online]. Available: https://www.lifegate.com/how-cfcs-destroy-ozone-layer.
[30] 	A. Benzaoui, S. Benhadid-Dib, "Refrigerants and their Environmental Impact Substitution of Hydro Chlorofluorocarbon HCFC and HFC Hydro Fluorocarbon. Search for an Adequate Refrigerant," Energy Procedia, vol. 18, p. 807 - 816, 2012. 
[31] 	"Chlorofluorocarbons (CFCs) and hydrofluorocarbons (HFCs)," [Online]. Available: https://www.pca.state.mn.us/air/chlorofluorocarbons-cfcs-and-hydrofluorocarbons-hfcs.
[32] 	"The Vienna Convention for the Protection of the Ozone Layer," [Online]. Available: https://ozone.unep.org/treaties/vienna-convention.
[33] 	"Vienna Convention and the Montreal Protocol," [Online]. Available: https://www.bafu.admin.ch/bafu/en/home/topics/chemicals/info-specialists/international-affairs--chemicals/vienna-convention-and-the-montreal-protocol.html.
[34] 	"Kigali Amendment," [Online]. Available: https://en.wikipedia.org/wiki/Kigali_Amendment.
[35] 	"Kyoto Protocol," [Online]. Available: https://en.wikipedia.org/wiki/Kyoto_Protocol#Background.
[36] 	R. W. James, T. C. Welch, "Refrigeration and Heat-Pump Systems," in Air Conditioning System Design, 2017, p. 167 – 189.
[37] 	J. M. Rodriguez, Treatise on Geochemistry, K. K. T. Heinrich D. Holland, Ed., Pergamon, 2007, p. 1-34.
[38] 	L. M. Amoo, R. L. Fagbenle, "15 - Climate change in developing nations of the world," in Applications of Heat, Mass and Fluid Boundary Layers, O. A. S. A. A. F. R.O. Fagbenle, Ed., Woodhead Publishing, 2020, p. 437- 471.
[39] 	Madhu, "Difference Between Azeotropic and Zeotropic Mixture," [Online]. Available: https://www.differencebetween.com/difference-between-azeotropic-and-zeotropic-mixture/.
[40] 	C. Kuo, H. Sung-Wei, K. Chang, C. Wang, "Analysis of a 50kW Organic Rankine Cycle System," Energy, vol. 36, no. 10, p. 5877 – 5885, October 2011. 
[41] 	Y. Tian, H. Zhang, L. Jian, H. Xiaochen, T. Zhao, F. Yang, X. Yonghong, X. Wang, "Development and Validation of a Single-Piston Free Piston Expander-Linear Generator for a Small-Scale Organic Rankine Cycle," Energy, vol. 161, p. 809 - 820, October 2018. 
[42] 	G. Li, H. Zhang, F. Yang, S. Song, Y. Chang, F. Yu, J. Wang, B. Yao, "Preliminary Development of a Free Piston Expander–Linear Generator for Small-Scale Organic Rankine Cycle (ORC) Waste Heat Recovery System," Energies, vol. 9, no. 4, p. 300, 20 April 2016. 
[43] 	X. Hou, H. Zhang, Y. Xu, Y. Tian, T. Zhao, J. Li, F. Yu, "Performance Investigation of a Free Piston Expander-Linear Generator for Small Scale Organic Rankine Cycle," Applied Thermal Engineering, vol. 144, p. 209 - 218, November 2018. 
[44] 	S. Preetham Burugupally, L. Weiss, "Design and Performance of a Miniature Free Piston Expander," Energy, vol. 170, p. 611 – 618, March 2019. 
[45] 	C. Champagne, L. Weiss, "Performance Analysis of a Miniature Free Piston Expander for Waste Heat Energy Harvesting," Energy Conversion and Management, vol. 76, p. 883 – 892, December 2013. 
[46] 	B.S. Preetham, L. Weiss., "Investigations of a New Free Piston Expander Engine Cycle," Energy, vol. 106, p. 535 – 545, July 2016. 
[47] 	"List of refrigerants," [Online]. Available: https://en.wikipedia.org/wiki/List_of_refrigerants.
[48] 	"What is the phase-out schedule for HCFC refrigerants?," [Online]. Available: https://www.ashrae.org/File%20Library/Technical%20Resources/Technical%20FAQs/TC-02.05-FAQ-33.pdf.