太阳能固体吸附式制冰系统长期性能研究——甲醇热分解实验研究

本文对太阳能制冷系统在商业化过程中出现的长期性能下降问题进行了实验研究与理论分析．对甲醇在活性炭微孔表面的热分解进行了理论及试验研究，得出了甲醇热分解可能的分解机理，采用分析化学中常用的质谱、色谱技术测定了甲醇的热分解产物及热分解速率，优选出了一种最适合于吸附器结构材料的金属．

STUDY ON LONG TERM PERFORMANCE OF THE SOLAR_ POWERED SOLID ADSORPTION REFRIGERATION SYSTEM Part 1: Experimental Study on Thermal Decomposition of Methanol

As the first step to study the long term performance of solar power refrigerator, an experimental investigation of thermal decomposition of methanol on activated carbon only and carbon+aluminum's, carbon+copper's, carbon+stainless steel's surfaces under solar powered solid adsorption refrigeration condition has been carried out at Monash University. The results showed that the thermal decomposition of methanol did occur in the normal solar powered solid adsorption refrigeration system. Dimethyl_ether, Methoxymehyl methyl ether and other compounds were found in the decomposition products. The rate of the decomposition are greatly different in the presence of different alloys because of their different catalytic effect on the decomposition reaction. The stainless steel was found to have the weakest catalytic effect on the decomposition reaction as compared with the other alloys and, therefore, is recommended to be used in the construction of the solar collector for such a system. These decomposition products (unwanted gases) may be one of the main reasons for the long term performance deterioration of the solar ice maker. The possible solutions to this problem are discussed in the paper. In the meantime, the equation of the decomposition rate constitutes the main key to the analysis of the relation between the rate of decomposition and the COP of solar powered refrigerator.