Thermal analysis of a 40MWe dish-based CSP plant using measured solar data
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Date
2012
Authors
Haseli, P.
Christo, F.C.
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Conference paper
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Proceedings of the 50th Annual Conference, Australian Solar Energy Society (Australian Solar Council), 2012, pp.1-10
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50th Annual Australian Solar Council (AuSES) Solar 2012 Conference (6 Dec 2012 - 7 Dec 2012 : Melbourne, VIC)
Abstract
The analysis explored two optional concepts; a hybrid solar-burner system and an integrated solar-burner-thermal storage system. The results are presented for the months of March (summer) and July (winter) using a minute-by-minute solar data. The analysis results show that integrating an auxiliary burner to a standard CSP-Rankin Cycle is required to deliver a constant 40 MWe for longer hours. The required amount of fuel for the months of March and July is 7% and 10% of the total energy required to generate 40MWe power respectively. A comparison between March and July (using a solar-burner system) showed that the number of power availability hours in March is approximately twice that for July; 162hours as apposite to 52 hours.
The underlying idea of the proposed design is to decouple the solar field output from the power generation cycle. This can be achieved by using a medium-temperature (~500°C) thermal storage (TS) system, which is designed to manage the variability of solar energy and providing a constant power output during peak-demand for several hours. However, it was found that an additional external energy around 18% is still required for delivering a 40MWe power output.
This study examines the thermal performance of a 40MWe direct steam generation dish-technology concentrating solar power (CSP) plant. It explores a design option for utilising and managing the collected solar energy, particularly during peak-demand periods. A steam cycle pressure of 100bar and a turbine inlet temperature of 750°C are selected for the proposed system. Analysis of the proposed cycle was performed using a measured (minute-by-minute) solar data.
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