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In terms of electrical efficiency almost all the embodiments with the supercritical CO2 working fluid beats the ordinary Steam CHP unit T-250/300-23.5 except for the embodiment “Combined Simple Steam-SCO2 CHP Plant”. The Cascaded Supercritical CO2 CHP Plant was found to have the best electrical efficiency. The electrical power production depends on the heat load of the plant for the "Steam Rankine cycle CHP plant with bottoming supercritical CO2 cycle" concept and does not depend on it for the "CHP plant with single supercritical CO2 working fluid" frame. In terms of Heat Utilization Factor the best embodiment is the “Combined Simple Steam-SCO2 CHP Plant” but taking into account that the electrical power is more valuable than the heat the “Cascaded Supercritical CO2 CHP Plant” is preferable. However, to make a choice between the considered embodiments the value of capital costs and the specific needs of the customer in the thermal and electrical energy should be considered. Acknowledgments We wish to thank the many people from SoftInWay Inc. team who generously contributed with their time and effort in the preparation of this work. The strength and usability of the material presented here are only as good as the inputs and their insightful contributions are greatly appreciated. References [1] Anna Shipley, Anne Hampson, Bruce Hedman, Patti Garland and Paul Bautista, "Combined Heat And Power - Effective Energy Solutions for a Sustainable Future", Report for the U.S. Department Of Energy, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6283, December 1, 2008 [2] Vaclav Dostal, Pavel Hejzlar, Michael J. Driscoll, “The Supercritical Carbon Dioxide Power Cycle: Comparison to Other Advanced Power Cycles”, Nuclear Technology Vol. 154, pp. 283- 282, June 2006. [3] Oleg Guriev, Yuriy Govoruschenko, Leonid Moroz, Supercritical CO2 Brayton Cycle. S-CO2 represents an advance in power conversion technology, Turbomachinery International. The Global Journal of Energy Equipment, January/February 2013. [4] Gregory A. Johnson, Michael McDowell, "Issues Associated with Coupling Supercritical CO2 Power Cycle to Nuclear, Solar and Fossil Fuel Heat Sources", Report, Hamilton Sundstrand, Energy Space & Defense - Rocketdyne. [5] Truhnij A., Lomakin B., Cogeneration steam turbines and units: manual for University, MPEI press, 2002. ISBN 5-7046-0722-5 [6] Vaclav Dostal, Pavel Hejzlar, Michael J. Driscoll, “A Supercritical Carbon Dioxide Cycle for next generation nuclear reactors”, Advanced Nuclear Power Technology Program MIT-ANP- TR-100, March 10, 2004. 12PDF Image | Study of a Supercritical CO2 Power Cycle Application in a Cogeneration Power Plant
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