| Summary: | 碩士 === 國立臺灣師範大學 === 工業教育學系 === 104 === This study investigated the effect of infrared water-based coating (IWC) for the domestic refrigerator performance. The fourier transform infrared spectroscopy (FTIR) was adopted to detect infrared (IR) spectral characteristics of materials and to select the most suitable materials for infrared resonance. Firstly, the zirconium dioxide (ZrO2), multi-walled carbon nanotubes (MWCNTs), and tourmaline were selected for added materials. Then, the IWC with various materials and concentrations was prepared by using two-step synthesis method, and FTIR detection to determine the optimal concentration was 5.0 wt.%. Finally, the 5.0 wt.%-IWC was sprayed on the acrylic plate, and placed on the refrigerator shelves to investigate the effect of IWC for refrigerator performance. The refrigerator performance test involved no-load pull-down test and 24 hr on-load cycling test for monthly energy consumption (Wm), energy factor (EF), slope of pull-down (SPD), freezer/cold storage temperature, and the temperature uniformity.
The results showed that the refrigerator with tourmaline-IWC had the optimal Wm and EF for all test parameters, the Wm and EF with decreasing 0.28 to 4.19% and increasing 0.67 to 4.33% compared with the refrigerator without IWC, respectively. The slope of pull-down of freezer/cold storage temperature for the refrigerator with IWC was lower than the refrigerator without IWC. The slope of pull-down of load in freezer for the refrigerator with MWCNTs-IWC was 0.18 to 0.55% higher than that of the refrigerator without IWC, however, the slope of pull-down of load in cold storage for the refrigerator with IWC was lower than that the refrigerator without IWC. The optimal uniformity of freezer temperature and cold storage temperature was refrigerator with ZrO2-IWC and MWCNTs-IWC, respectively.
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