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Optimization and Assessment of Parabolic Trough Solar Power Plants in Arid Climates: A Case Study in Tunisia
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DOI：10.1002/ese3.70405.png)
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Abstract
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This study aims to model a solar power plant (SPP) utilizing parabolic trough collectors (PTC) to fulfill the electricity needs in an arid zone of the southern of Tunisia. The research integrates both experimental and numerical approaches. A prototype of a PTC was first constructed and experimentally tested under arid climates. Subsequently, a numerical study was carried out using the Transient Systems Simulation (TRNSYS) software to assess its annual performance. The comparison reveals a good agreement between the TRNSYS-modeled PTC system and the experimental data. The study further examines the power plant's performance under several operating scenarios. These evaluations aim to verify reliable operation and the ability to satisfy the chosen site's energy requirements. The solar field was optimized to cover 65,000 m2, producing an annual energy output of 4.52 GWh, which is sufficient to supply the electrical needs of a delegation in Tunisia called Hazoua. Different combinations of energy sources are studied. Results show that the hybrid solution, comprising 60% solar energy and 40% gas backup, demonstrates technical advantages with a system efficiency of 22%. The optimization scenario is also reinforced by an economic study. In fact, the Levelized Cost of Electricity (LCOE) of the power plant is of 0.1815 USD/kWh and the Payback Period (PP) is 4 years and 7 months, which indicates its strong competitiveness compared to transmission costs. Likewise, the environmental aspect is taken into account and the suggested hybrid strategy has the potential to reduce annually by about 925,000 kg CO2 emissions. This work can guide decision-making for utilities and policymakers for rural electrification in arid regions aiming to implement efficient and reliable renewable energy solutions in such zones.
Keywords:
experimental tests
LCOE
numerical results
parabolic trough collector
Rankine cycle
solar power plant
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