2026-04-23T21:20:35Zhttps://uvadoc.uva.es/oai/request

oai:uvadoc.uva.es:10324/654252025-01-14T20:04:45Zcom_10324_1170com_10324_931com_10324_894col_10324_1367

Low temperature heat source for power generation: Exhaustive analysis of a carbon dioxide transcritical power cycle Velez Jaramillo, Jhon Fredy Segovia Puras, José Juan Chejne, Farid Antolín Giraldo, Gregorio Quijano, Ana Martín González, María del Carmen Producción Científica The main results of a theoretical work on the use of a low temperature heat source for power generation through a carbon dioxide transcritical power cycle are reported in this paper. The procedure for analyzing the behaviour of the proposed cycle consisted in modifying the input pressure to the turbine from 66 bar, maintained constant each evaluated temperature (60 °C, 90 °C, 120 °C and 150 °C) until the net work was approximately zero. As a result, the maximum exergy efficiency was 50%, while the energy efficiencies obtained were 9.8%, 7.3%, 4.9% and 2.4% and the net specific work was 18.2 kJ/kg, 12.8 kJ/kg, 7.8 kJ/kg and 3.5 kJ/kg, respectively. Furthermore, the effect of the addition of an internal heat exchanger, which obviously supposed an increase in the efficiency, was analyzed. The analysis of the proposed system shows the viability of implementing this type of process as an energy alternative and/or strengthener of non-conventional energy sources in non-provided zones, or for increasing the energy efficiency in the industry. 2024-01-31T10:26:07Z 2024-01-31T10:26:07Z 2011 info:eu-repo/semantics/article Energy, Vol. 36, Issue 9, Pages 5497 - 5507 0360-5442 https://uvadoc.uva.es/handle/10324/65425 10.1016/j.energy.2011.07.027 5497 9 5507 Energy 36 eng https://www.sciencedirect.com/science/article/pii/S0360544211004750 info:eu-repo/semantics/openAccess Elsevier Ltd Elsevier SI