INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, cilt.166, 2025 (SCI-Expanded)
The conventional method of using water to cool white cement clinkers results in a lot of water being wasted since it can't be reused. This paper introduces an innovative system that employs CO2 for the convective cooling of hot clinkers, which not only prevents oxidation but also allows for substantial heat recovery. The energy that's recovered is then used to power a multi-generation system that produces power, hydrogen, heating, and cooling, all while minimizing waste heat and boosting sustainability. This research includes a thorough exergoeconomic assessment of the integrated system, using a sophisticated methodology to gauge its performance and economic feasibility. The exergoeconomic analysis is carried out with the Specific Exergy Costing (SPECO) approach. Additionally, the Technique for Order of Preference by Similarity to Ideal Solution (TOPSIS) is utilized as a multicriteria decision analysis (MCDA) tool to assess the system's economic performance across different operational and financial scenarios. The findings show that the Rotary Kiln Heat Exchanger and the Heat Recovery Steam Generator are the biggest culprits when it comes to exergy destruction, making up 76.9 % and 9.3 % of the total, respectively. The overall exergoeconomic factor for the system stands at 26.81. Additionally, the MCDA results provide a comprehensive ranking of important economic outcomes, offering valuable insights that can aid in strategic decision-making.