抄録
A simulation of the moving granular-bed type heat exchanger, in which heat is transferred from the hot gas through granular materials and heat pipes to the cold gas, has been performed. A numerical simulation model was made by dividing each part of the heat exchanger into small elements, and heat balance was calculated using the finite difference method. The heat transfer coefficients and effective thermal conductivities of the granular bed in each part of the heat exchanger were estimated from a general theory, while the heat transfer coefficient between the granular bed and heat pipes was determined from the experiment.
The steady characteristics of the heat exchanger from the calculations were compared with the data obtained from the experiment. The calculation results coincided well with the experimental results. The method of modeling and simulation was confirmed to be accurately applicable to the estimation of the performance of the heat exchanger using granules as heat transferring media and heat pipes.
† This report was originally printed in J. Soc. Powder Technology, Japan, 20(4), 185-193 (1983) in Japanese, before being translated into English by KONA Editorial Committee with the permission of the editorial committee of the Soc. Powder Technology, Japan.
