Numerical Simulation of Temperature in the Adsorbent Bed in Insolation

To deeply study the internal temperature changes of the adsorbent bed in insolation, based on the fully understanding of solar radiation variation regularity and the configuration of evacuated tube bed, a two-dimensional model of heat transfer was established. To identify the effect of the internal cooling mode, the temperature field in the adsorbent bed under two cooling conditions was investigated with FLUENT techniques. Results show that the maximum temperature difference for the uniform wall temperature condition and natural convection of the air condition can reach 100℃. Meanwhile, the temperature distribution of the bed presents an obvious non-uniform phenomenon. It can be concluded that the uniform wall temperature condition has an obviously better cooling effect than that of the natural convection of the air condition. In addition, the non-uniform distribution of the temperature in the bed hinders the adsorption cooling performance.