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

L F Patiño; U Azimov; C P Tavera-Ruiz; J M Castellanos; P Gauthier-Maradei; L Castro

doi:10.1088/1755-1315/897/1/012003

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

L F Patiño, U Azimov^*, C P Tavera-Ruiz, J M Castellanos, P Gauthier-Maradei, L Castro^*

^*Corresponding author for this work

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Abstract

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.

Original language	English
Article number	012003
Pages (from-to)	1-9
Number of pages	9
Journal	IOP Conference Series: Earth and Environmental Science
Volume	897
Issue number	1
DOIs	https://doi.org/10.1088/1755-1315/897/1/012003
Publication status	Published - 27 Aug 2021
Event	4th International Conference on Renewable Energy and Environment Engineering - Virtual (Florence), Italy Duration: 27 Aug 2021 → 30 Aug 2021 http://www.reee.net/

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SDG 7 Affordable and Clean Energy

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

abstract = "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{\textquoteright} 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.",

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note = "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\textbackslash{}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, REEE 2021 ; Conference date: 27-08-2021 Through 30-08-2021",

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AU - Azimov, U

AU - Tavera-Ruiz, C P

AU - Castellanos, J M

AU - Gauthier-Maradei, P

AU - Castro, L

N1 - 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.

PY - 2021/8/27

Y1 - 2021/8/27

N2 - 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.

AB - 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.

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T2 - 4th International Conference on Renewable Energy and Environment Engineering

Y2 - 27 August 2021 through 30 August 2021

ER -

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

Abstract

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