Title: Designing and exergetic analysis of a solar power tower system for Iskenderun region

Authors: Hüseyin Yağlı; Cuma Karakuş; Yıldız Koç; Mehmet Çevik; İrem Uğurlu; Ali Koç

Addresses: Faculty of Engineering and Natural Sciences, Department of Mechanical Engineering, Iskenderun Technical University, 31200, Iskenderun, Hatay, Turkey ' Faculty of Engineering and Natural Sciences, Department of Mechanical Engineering, Iskenderun Technical University, 31200, Iskenderun, Hatay, Turkey ' Faculty of Engineering and Natural Sciences, Department of Mechanical Engineering, Iskenderun Technical University, 31200, Iskenderun, Hatay, Turkey ' Faculty of Engineering and Natural Sciences, Department of Mechanical Engineering, Iskenderun Technical University, 31200, Iskenderun, Hatay, Turkey ' Faculty of Engineering and Natural Sciences, Department of Mechanical Engineering, Iskenderun Technical University, 31200, Iskenderun, Hatay, Turkey ' Faculty of Engineering and Natural Sciences, Department of Mechanical Engineering, Iskenderun Technical University, 31200, Iskenderun, Hatay, Turkey

Abstract: In this paper, a steam cycle assisted solar tower power system is designed and parametrically optimised for Iskenderun region by considering the weather conditions. After the optimisation, exergy-based analysis of the compounds and overall plant is performed for the best-performing cycle conditions. As a result of the annual-based monthly parametric optimisation, the design parameters, working performance, energy and exergy efficiencies of system are compared to obtain the best-performing cycle conditions which are found in July at the tower outlet pressure and temperature of 100 bar and 1,000°C. The net power production and thermal efficiency of the system at the best-performing conditions are calculated as 47,046.60 kW and 45.814%, respectively. After the exergetic analysis of compounds and overall system, the highest exergetic efficiency is evaluated in 2nd turbine (T-2) as 99.23% and the lowest exergetic efficiency is found in 1st heat exchanger (HeX-1) as 74.16%. Moreover, the overall exergetic efficiency is calculated as 47.19%.

Keywords: solar power tower; SPT; steam cycle; parametric optimisation; energy analysis; exergy analysis.

DOI: 10.1504/IJEX.2019.097273

International Journal of Exergy, 2019 Vol.28 No.1, pp.96 - 112

Received: 28 Feb 2018
Accepted: 09 Oct 2018
Published online: 07 Jan 2019 *

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