太阳能固体吸附式制冰系统长期性能研究(Ⅰ)——不良气体存在下系统性能预测

STUDY ON LONG TERM PERFORMANCE OF SOLAR POWERED SOLID ADSORPTION REFRIGERATION SYSTEM (Ⅱ) ——System Performance Prediction with Unwanted Gases

对有不良气体存在下系统的制冷热力学循环进行了分析，建立了不良气体存在时，系统循环ＣＯＰ的计算模型，利用所建ＣＯＰ模型对系统的长期性能变化进行了分析并对系统寿命进行了评估，在此基础上提出了解决系统长期性能下降问题的简便而有效的途径．

During the development of the methanol/charcoal ice_maker, we have observed a deterioration problem in its long term performance. One of the main reasons for this deterioration is the formation of unwanted gas inside the system. Another factor may be the deactivation of an adsorbent. When two or more adsorbable components exist with the possibility of occupying the same adsorption sites, adsorption isotherm relationship will become complicated. Owing to the involvement of competitive and selective adsorption. The relation between the rate of the performance change and that of unwanted gas formed is no longer linear. The impact of the unwanted gases on the ideal solar powered solid adsorption refrigeration cycle was discussed in the paper. The relationship between the rate of thermal decomposition of methanol and the long term performance deterioration is also studied theoretically. Based on our experimental and theoretical studies, three simple and effective methods were put forward to solve this kind of performance deterioration problem.