研究目的
To investigate the feasibility of replacing the booster heater and the HTF fire heaters by gas turbines to boost the total power generation of Shams 1 and provide the heat required for the HTF when solar irradiation is dimmed and superheat the steam for the base Rankine cycle.
研究成果
Integrating gas turbines with the CSP plant improves efficiency and reduces CO2 emissions for HTF heater replacement, but increases emissions for booster heater replacement. The optimal excess air factor is around 2.5. Economic analysis shows a payback period of 4-5 years, with significant cumulative revenue over the plant's lifetime. Future work includes optimizing the combination for maximum efficiency and cost reduction.
研究不足
The study assumes specific operational conditions and does not account for real-world variations or potential technical challenges in retrofitting. The economic analysis is based on forecasted data and may not reflect actual market conditions. The model is theoretical and requires validation with experimental data.
1：Experimental Design and Method Selection:
A thermodynamic model was developed on the IPSEpro platform for two cases: replacing HTF direct fire heaters with gas turbines (case1) and replacing booster heaters with gas turbines (case2). The model uses energy and exergy balance equations, including Carnot efficiency, heat transfer, work output, and exergy destruction calculations.
2：2). The model uses energy and exergy balance equations, including Carnot efficiency, heat transfer, work output, and exergy destruction calculations. Sample Selection and Data Sources:
2. Sample Selection and Data Sources: The study is based on the Shams1 CSP plant configuration, using operational parameters such as mass flow rates, temperatures, and pressures as provided in the paper. HTF fluid properties for Dowtherm A are used based on manufacturer data.
3：List of Experimental Equipment and Materials:
The equipment includes gas turbines, heat exchangers, compressors, and the IPSEpro software for modeling. Materials involve natural gas, Dowtherm A HTF, and steam.
4：Experimental Procedures and Operational Workflow:
The model simulates the integration of gas turbines into the existing CSP system, varying the excess air factor to analyze performance metrics like efficiency and emissions. Counterflow heat exchangers are used.
5：Data Analysis Methods:
Data analysis involves calculating second law efficiency, renewability, CO2 emissions, and economic parameters using equations provided, with results plotted and tabulated for comparison.
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