Simulation of countercurrent gas–solid heat exchanger: Effect of solid loading ratio and particle size

Simulation of countercurrent gas–solid heat exchanger using one-dimensional, two-fluid model has been carried out and predictions compared with experimental data reported in literature and found satisfactory. Effect of solid loading ratio, particle size and their interactions on heat transfer rate, temperature profile and thermal effectiveness of gas have been studied. Heat transfer rate was found to increase with increasing solid loading ratio and decreasing particle size. Higher heat recovery can be achieved for large particles at high solid loading ratios, while it can be achieved with wide range of solid loading ratios for small particles. Scope for further study is highlighted.