Optimization design and peaking characteristics analysis of integrated solar combined cycle system

Baoda Huang, Chunhao Zhao, Qizhen Peng, Heng Zhang, Chao Cheng, Jiguang Huang, Haiping Chen and Dan Gao

Energy, 2025, vol. 321, issue C

Abstract: Improving the peaking performance of gas turbine combined cycle is of great significance for improving the consumption of renewable energy. In this study, an inlet air heating gas turbine combined cycle integrated with solar collector is proposed, which includes four integration schemes, in order to improve the thermal performance and peaking capability of the power plant. These schemes are compared from perspectives of energy, exergy and economy. The effects of compressor inlet air temperature and heat transfer oil flow on the optimal scheme's thermal performance are examined, and the integrated system's peaking capability is explored. Results show that among the four proposed integration schemes, the lower the feed water temperature distributed into the solar collector, the more pronounced the efficiency improvement. Both thermal and exergy efficiencies increase with the increase of inlet air temperature and solar energy input. The maximum increases achieved are 2.45 % for thermal efficiency and 2.40 % for exergy efficiency. The peaking range is widened by 27.48 MW (10.44 %). The consumption of renewable energy during the heating season is increased by 4637.95 MW. This work provides an effective method to enhance the thermoelectric decoupling capability of gas turbine combined cycles.

Keywords: Gas turbine; Solar energy; Inlet air heating; Thermal performance; Grid peaking (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:321:y:2025:i:c:s0360544225011296

DOI: 10.1016/j.energy.2025.135487

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