Khatima Kaabèche-Djerafi

• MCA
• Research Associate at National Polytechnic School of Constantine

The present work deals with the deployment of an air bottoming cycle as a technology for thermal energy valorization. This solution is integrated within the preheater tower on an Algerian cement plant. A combined MATLAB-Coolprop optimization tool has been developed to carry out a thermo-economic calculation allowing to design and optimize the air b...

Cement factories are among the most energy-intensive industries due to the huge consumption of the clinker manufacturing process (3.2-6.3 GJ ton-1). In addition, the process is characterized by high energy losses since there are two sources of waste heat at high temperature. To improve the system overall efficiency and reduce its emission per ton o...

The Algerian economy and electricity generation sector are strongly dependent on fossil fuels. Over 93% of Algerian exports are hydrocarbons, and approximately 90% of the generated electricity comes from natural gas power plants. However, Algeria is also a country with huge potential in terms of both renewable energy sources and industrial processe...

The present work discusses the options of Waste Heat Recovery (WHR) in Algerian cement industry. Steam and Organic Rankine Cycle (SRC and ORC) solutions are proposed to recover the waste heat of a cement industry located in the North of Algeria. A thermodynamic optimization of both cycles is performed with the aim of maximizing each WHR unit net po...

This work evaluated the air bottoming cycles (ABC) as a technology for waste heat recovery (WHR) at the level of the preheater tower in a cement industry. An optimization code has been developed in MATLAB environment and linked with REFPROP database as a way to design and calculate the different parameters and points of the cycle. The theory of pow...

Cement manufacturing is a highly energy intensive process, which resulting a large loss of energy at the level of the different plants, in other way the loss of energy in the form of heat is very significantly at the level of the cooler. This work focus on direct waste heat recovery, where tertiary air was recovered to the preheater, for this study...

This study aims at the recovery of energy by using the tertiary air and the secondary air emerging from the cooler at the cement plant Djawad Taher of Algeria, in order to increase the production of clinker and to minimize the amount of hot air pumping out of the firing line to recover energy. There are several cements plants in the world that uses...

The paper aims at investigating the importance of including chemical heterogeneity in fixed bed as it has been found to induce additional dispersion. A discrete chemical heterogeneity distribution has been considered in the one-dimensional advective-dispersive equation. The partial differential equation was solved using finite volumes method based...

The paper aims at investigating influence of medium capacity on linear adsorbed solute dispersion into chemically heterogeneous fixed beds. A discrete chemical heterogeneity distribution is considered in the one-dimensional advectivedispersive equation. The partial differential equation is solved using finite volumes method based on the Adam-Bashfo...