2026-05-05T20:59:14Zhttps://uvadoc.uva.es/oai/request

oai:uvadoc.uva.es:10324/693742025-02-21T10:30:31Zcom_10324_1170com_10324_931com_10324_894col_10324_1367

Segovia Puras, José Juan Moreau Ortega, Alejandro Paredes Mendez, Xavier Fernández Vicente, Teresa Vega Maza, David Martín González, María del Carmen Biogas Sustainable development Desarrollo sostenible Biomass energy Biomasa Resonators Sound Sonido Sound absorption Noise control Ruido - Control Renewable energy resources Energías renovables Environmental engineering Environment Producción Científica Biogas is drawing attention as it can be a solution both to increase the renewable energy for heat or power supply and to help achieve a decarbonized economy. In this work, the measurements of the speed of sound of three mixtures of biogas from the biomethanation plant of the municipal waste of Valdemingómez, Madrid (Spain), are presented. The measurements were performed using an acoustic resonator, which is able to measure the speed of sound of gas mixtures with a relative expanded uncertainty of approximately 0.08%. A virial-type equation was also applied to fit the experimental values of the speed of sound, and the heat capacities as perfect gas were derived with uncertainties below 0.8%. In addition, the experimental results were compared with those calculated with the reference equations of state for natural gas mixtures such as GERG-2008 and AGA8-DC92. For both equations, the average relative deviations were less than 0.02% and 0.2% for the speed of sound and the heat capacities, respectively. These values are less than the uncertainties of these equations, demonstrating their reliability in predicting the thermodynamic behavior of biogas. 2024-08-20 2024-08-20 2023 info:eu-repo/semantics/article Energies, 2023, Vol. 16, Nº. 4, 2068 1996-1073 https://uvadoc.uva.es/handle/10324/69374 10.3390/en16042068 2068 4 Energies 16 1996-1073 eng https://www.mdpi.com/1996-1073/16/4/2068 info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/4.0/ © 2023 The authors Atribución 4.0 Internacional MDPI