Authors Adnan M. Al-SaffawiMechanical Engineering Department, College of Engineering, The University of Mosul, Almajmoa, Mosul 41200, IraqMaan S. M. Al-DabbaghMechanical Engineering Department, College of Engineering, The University of Mosul, Almajmoa, Mosul 41200, IraqAsmaa Taha HusseinDepartment of Power Mechanics Techniques Engineering –Technical College – Mosul – Northern Technical University, IraqNooraldeen Saleh KhidhirMechanical Engineering Department, College of Engineering, The University of Mosul, Almajmoa, Mosul 41200, Iraq Abstract The heat exchangers are used to transmit thermal energy between; two or more fluids, fluid and solid particle, or solid surface and liquid. The fluidized bed heat exchanger is essential in many industrial systems that are being a multiphase flow system and improves the capability of transferring heat to or from the system. There for, the main target of this experimental work is to compare the effectiveness of fluidized bed heat exchanger with that of conventional type. To achieve that purpose a computer program has been builted to calculate the effectiveness using the number of units transmitted (NTU). Some variables such as water inlet temperature, length of the fin and the total surface area, have been imposed. The fluidized velocity, particle size and fluidized bed temperature assumed to be constant. The calculations of the effectiveness were based on that the type of exchanger is finned tube type and unmixed fluids. The results showed that the effectiveness of the fluidized bed heat exchanger is higher than that of conventional one by 10%, and the number of units transmitted by fluidized bed heat exchanger is greater than that of conventional type. Keywords Fluidized bed Heat Exchanger Effectiveness Citation of this Article Adnan M. Al-Saffawi, Maan S. M. Al-Dabbagh, Asmaa Taha Hussein, & Nooraldeen Saleh Khidhir. (2025). Comparison the Effectiveness of Fluidized Bed Heat Exchanger with Conventional Heat Exchanger. International Current Journal of Engineering and Science (ICJES), 4(10), 11-15. Article DOI: https://doi.org/10.47001/ICJES/2025.410003 Licence Copyright (c) 2026 International Current Journal of Engineering and Science. This work is licensed under a Creative Commons Attribution Non Commercial 4.0 International Licence. References Anusaya M. Salwe (2013), ''Local heat transfer coefficient around a horizontal heating element in gas-solid fluidized bed'' from University of pune, International Journal of Application or Innovation in Engineering & Management. Anusaya M. Salwe, Shubham S. Pande and Juned S. Kan, "Effect of velocity and particle size on the coefficient of heat transfer in fluidized bed heat exchanger" International of Engineering Research and General Science Volume 2, Issue2, Feb-Mar 2014.ArturBlaszczuk, MichalPogorzelec, and Tadaaki Shimizu "Heat transfer characteristics in a large-scale bubbling fluidized bed with immersed horizontal tube bundles" Energy. Volume162, November2018 pages10-19.Runxia Cai, Man Zhang, Rongcun Ge, Xian Zhang and Junfu Lyu, "Experimental study on local heat transfer and hydrodynamics with single tube and tube bundles in an external heat exchanger" Applied Thermal Engineering Volume 14925 February 2019 Pages 924-938.Feng J iang, Xinhua Dong, Guopeng Qi, Piaocai Mao and XiulunLi "Heat-transfer performance and pressure drop in a gas-solid circulating fluidized bed spiral-plate heat exchanger" Applied Thermal Engineering Volume 1715 May 2020 Article 115091. Priscilla Corrêa Bisognin, Jaci Carlo Schramm Câmara Bastos, Henry França Meier, Natan Padoin and CíntiaSoares" Influence of different parameters on the tube-to-bed heat transfer coefficient in a gas-solid fluidized bed heat exchanger" Chemical Engineering and Processing Intensification. Volume 147, Journal 2020.Chenshu Hu, Kun Luo*, Shiliang Yang, Shuai Wang, Jianren Fan, ''A comprehensive numerical investigation on the hydrodynamics and erosion characteristics in a pressurized fluidized bed with dense immersed tube bundles'' Chemical Engineering Science Volume 153(2016) 129-145.Younus, A Gencel, "Heat transfer a practice approach", International addition 1998.Zukauskas, A. A., V. Makarevicius, and A. Schlanciauskas: Heat Transfer in Banks of Tubes in Crossflow of Fluid. Vilnius, Lithuania: Mintis, 1968.Al-Saffawi, A. M., Al-Ali, B. M., "Performance of a Shallow Fluidized Bed Heat Exchanger For Automobile Engine Cooling", International conference of Energy System, Amman, Sept. 2000.Al-Mtaiuty, A. E. J., "Comparison of the Performance for the Annular Fin with Different Shapes", M.SC. Thesis, University of Mosul, 1998.