Design, modelling and optimisation of a small-scale Solar Organic Rankine Cycle system for rural power generation

Patiño, L F, Azimov, Ulugbek, Tavera-Ruiz, C P, Castellanos, J M, Gauthier-Maradei, P and Castro, L (2021) Design, modelling and optimisation of a small-scale Solar Organic Rankine Cycle system for rural power generation. IOP Conference Series: Earth and Environmental Science, 897 (1). 012003. ISSN 1755-1307

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This research study develops the design and model of a Solar Organic Rankine Cycle (SORC) coupled to a bio-digester for small-scale generation in rural areas, in Betulia, Colombia. Moreover, the model is optimised employing a Genetic Algorithm with the software Matlab and the thermodynamic library CoolProp. The objective variables were the mass flow rate of the working fluid, the pressure and temperature of the expander inlet, the solar collectors’ type and the temperature of the water circuit for the bio-digester. The results indicate an overall efficiency between 8.42 and 9.45% with a Levelized Cost of Energy (LCE) between 3.85 and 5.63 £/W. Additionally, the power output is directly related to the mass flow rate of the working fluid. Likewise, increasing the scale of the SORC decreases the LCE. Finally, the results suggest that a superheated fluid reduces the efficiency and the LCE and can deliver more heat to the bio-digester. It is advisable the utilisation of a scroll expander and a counter-flow plate exchanger with a Direct Vapour Generation configuration. The model is a flexible tool capable of integrating more equations and components, with the evaluation of different fitness functions.

Item Type: Article
Additional Information: Funding information: The authors are especially grateful to the Industry-Academia Partnership Program (IAPP) of the Royal Academy of Engineering for the funding and support (Grant No. IAPP18-19\269). As well as to the Faculty of Engineering and Environment of the University of Northumbria in the UK and the School of Chemical Engineering of the Universidad Industrial de Santander in Colombia. Claudia Tavera-Ruiz thanks the postdoctoral program of the Ministry of Science, Technology and Innovation of Colombia for the funding. 4th International Conference on Renewable Energy and Environment Engineering; 27-30 Aug 2021; Virtual (Florence), Italy
Subjects: H800 Chemical, Process and Energy Engineering
Department: Faculties > Engineering and Environment > Mechanical and Construction Engineering
Depositing User: John Coen
Date Deposited: 06 Dec 2021 13:04
Last Modified: 06 Dec 2021 13:15

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