Abstract

In reality, cement industry is a highly imperative segment in the industrial field that plays a substantial role in the socio-economic evolution. Up to now, approximately 40% of the waste heat energy from cement plants is released into the atmosphere without being used effectively. This work emphasizes the ability to recover the heat losses via convection and radiation in a grate cooler using new methods by utilizing these waste heats to heat the working fluid of a cogeneration cycle directly and indirectly. On the other hand, the recovery cycle was added with different four working fluids (water, nanofluid (Al- water), oil and air) to recover the waste heat and to heat the working fluid of cogeneration cycle. The energy efficiency of the first method was approximately 26% and it represented better than the second method. On the other hand, the exergy efficiency of second method with oil as a working fluid was the highest. The first method gave the best results in terms of energy and cost savings.Finally, the emission reduction of CO2 in the first method was 5053.55t CO2/year.