“沸石-水”封闭吸附循环的传热传质特性

Heat and Mass Transfer Characteristics in the "Zeolite-Water" Closed Adsorption Cycle

本文对以“沸石-水”为吸附工质对的吸附式热泵循环过程中的传热传质特性进行了理论分析和实验研究,提出了较切合实际的数学模型。该模型包括了吸附器中“沸石-水”固-汽两相随吸附过程变化的各物理参数和其它操作参数,较准确地模拟了实验过程。证实了传热速率控制热泵循环速度;说明强化吸附器的传热有利于提高吸附循环速度;而减少吸附器内非填充体积则有利于改进吸附式热泵的循环效率。

Based on uasteady state bed heat transfer controlling and potential theory of adsorption isotherm. A mathematical model for water adsorption heat pump cycle on zeolite was presented. The temperature profile and adsorption rates obtained experimentally were in agreement with the data predicted from the model. The results proved the assumption of heat transfer rate controlling. Intensitication of heat transfer process, such as decreasing the dead space, adding fins on high heat transfer resistance side, will improve the adsorption heat pump cycle.