Next Article in Journal
Flexible Electricity Dispatch of an Integrated Solar Combined Cycle through Thermal Energy Storage and Hydrogen Production
Previous Article in Journal
A Review on Thermal Energy Modelling for Optimal Microgrids Management
Article

Techno-Economic Optimization of Medium Temperature Solar-Driven Subcritical Organic Rankine Cycle

Laboratory of Steam Boilers and Thermal Plants, Department of Thermal Engineering, School of Mechanical Engineering, National Technical University of Athens, 9 Heroon Polytechniou Street, 15780 Zografou, Greece
*
Author to whom correspondence should be addressed.
Academic Editor: Johan Jacquemin
Received: 7 April 2021 / Revised: 3 May 2021 / Accepted: 7 May 2021 / Published: 21 May 2021
The present work focuses on the techno-economic assessment and multi-objective genetic algorithm optimization of small-scale (40 kWth input), solar Organic Rankine Cycle (ORC) systems driven by medium-to-high temperature (up to 210 °C) parabolic dish (PDC) and trough (PTC) collectors. The ORCs are designed to maximize their nominal thermal efficiency for several natural hydrocarbon working fluids. The optimization variables are the solar field area and storage tank capacity, with the goal of minimizing the levelized cost of produced electricity (LCoE) and maximizing the annual solar conversion efficiency. The lowest LCOE (0.34 €/kWh) was obtained in Athens for a high solar field area and low storage tank capacity. Meanwhile, the maximum annual solar conversion efficiencies (10.5–11%) were obtained in northern cities (e.g., Brussels) at lower solar field locations. While PTCs and PDCs result in similar efficiencies, the use of PTCs is more cost-effective. Among the working fluids, Cyclopentane and Cyclohexane exhibited the best performance, owing to their high critical temperatures. Notably, the systems could be more profitable at higher system sizes, as indicated by the 6% LCoE decrease of the solar ORC in Athens when the nominal heat input was increased to 80 kWth. View Full-Text
Keywords: organic Rankine cycle; solar energy; genetic algorithm organic Rankine cycle; solar energy; genetic algorithm
Show Figures

Figure 1

MDPI and ACS Style

Roumpedakis, T.C.; Fostieris, N.; Braimakis, K.; Monokrousou, E.; Charalampidis, A.; Karellas, S. Techno-Economic Optimization of Medium Temperature Solar-Driven Subcritical Organic Rankine Cycle. Thermo 2021, 1, 77-105. https://0-doi-org.brum.beds.ac.uk/10.3390/thermo1010007

AMA Style

Roumpedakis TC, Fostieris N, Braimakis K, Monokrousou E, Charalampidis A, Karellas S. Techno-Economic Optimization of Medium Temperature Solar-Driven Subcritical Organic Rankine Cycle. Thermo. 2021; 1(1):77-105. https://0-doi-org.brum.beds.ac.uk/10.3390/thermo1010007

Chicago/Turabian Style

Roumpedakis, Tryfon C., Nikolaos Fostieris, Konstantinos Braimakis, Evropi Monokrousou, Antonios Charalampidis, and Sotirios Karellas. 2021. "Techno-Economic Optimization of Medium Temperature Solar-Driven Subcritical Organic Rankine Cycle" Thermo 1, no. 1: 77-105. https://0-doi-org.brum.beds.ac.uk/10.3390/thermo1010007

Find Other Styles

Article Access Map by Country/Region

1
Back to TopTop