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Thermo-economic evaluation of actively selected siloxane mixtures in a hybrid solar-biomass organic Rankine cycle power plant

Titelangaben

Oyekale, Joseph Oyetola ; Heberle, Florian ; Petrollese, Mario ; Brüggemann, Dieter ; Cau, Giorgio:
Thermo-economic evaluation of actively selected siloxane mixtures in a hybrid solar-biomass organic Rankine cycle power plant.
In: Applied Thermal Engineering. Bd. 165 (2020) . - 114607.
ISSN 1359-4311
DOI: https://doi.org/10.1016/j.applthermaleng.2019.114607

Abstract

This study aims to evaluate thermo-economic implications of implementing siloxane mixtures as organic Rankine cycle (ORC) working fluids for hybrid solar-biomass applications. Next to active selection of suitable mixtures and their thermodynamic evaluations, ORC components were sized under process conditions of different fluid studied. The main paper contribution concerns integrated off-design economic analysis of working-fluid mixtures in ORC. By comparing the studied mixtures with pure MM (hexamethyldisiloxane), results showed that 0.9MM/0.1MDM (octamethyltrisiloxane) and 0.8MM/0.2MDM increase net ORC power by 2 and 1.4 respectively, while 0.1MM/0.9MDM reduces net power by 1.3. Also, specific exergy cost of power production increases by 3.7, 1.9 and 1 for 0.1MM/0.9MDM, 0.8MM/0.2MDM and 0.9MM/0.1MDM, respectively. Furthermore, after implementing off-design models, increase in annual net energy production of 2.3, 3.2 and 5.2 were obtained for 0.1MM/0.9MDM, 0.8MM/0.2MDM and 0.9MM/0.1MDM, respectively. However, these thermodynamic advantages do not translate to better economic performance. Exemplarily for the most thermodynamically efficient mixture (0.9MM/0.1MDM), levelized cost of electricity and specific payback period increase by 8 and 13 respectively, while net present value reduces by 15.7, relative to pure MM. Thus, caution should be exercised when considering the use of selected siloxane mixtures as ORC working fluid in high-temperature applications such as solar/biomass.

Weitere Angaben

Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Keywords: Organic Rankine cycle; Siloxane mixtures; Renewable power plant; Thermo-economic analysis; Concentrated solar powe;, Hybrid solar-biomass plant
Institutionen der Universität: Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Technische Thermodynamik und Transportprozesse
Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Technische Thermodynamik und Transportprozesse > Lehrstuhl Technische Thermodynamik und Transportprozesse - Univ.-Prof. Dr.-Ing. Dieter Brüggemann
Profilfelder > Emerging Fields > Energieforschung und Energietechnologie
Forschungseinrichtungen > Forschungsstellen > Zentrum für Energietechnik - ZET
Fakultäten
Fakultäten > Fakultät für Ingenieurwissenschaften
Profilfelder
Profilfelder > Emerging Fields
Forschungseinrichtungen
Forschungseinrichtungen > Forschungsstellen
Titel an der UBT entstanden: Ja
Themengebiete aus DDC: 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften
Eingestellt am: 29 Nov 2019 14:36
Letzte Änderung: 07 Nov 2023 10:54
URI: https://eref.uni-bayreuth.de/id/eprint/53401