Energy and Exergy Assessment of A New Heat Recovery Method in A Cement Factory

Cement plants are one of the massive energy consumers and greenhouse gas producers. the processes carried out in a cement factory have considerable energy losses, and mostly happen due to the exhausted gases and airflow for cooling the clinker. the energy consumption in a regular plant is 25% electrical and 75% thermal. the main goal of this work is to represent a thermal recycling system in cement plants to generate power from high-temperature exhaust gases from the preheater and cooler high-temperature air. a thermodynamic analysis is carried out by the ees software, and the exergy efficiency and exergy destruction of each component of the system are obtained. moreover, a parametric study on the suggested cycle is used, and the results obtained show that if the input temperature and pressure of turbines get closer to the critical point of the expanded working fluid in turbines, the rate of net output work increases, which leads to an increase in the exergy efficiency of the whole system. the increased network of the cycle is almost 20%, which would rise from 3497 kw to 4186 kw, and the exergy efficiency would rise from 38% to 45.94%.