应用半导体制冷的冷藏链用储藏箱性能实验研究

Despite its small volume and quick refrigeration, semiconductor refrigeration plates have good application potential in refrigera ted transportation. To examine the cooling capacity of the storage box with a semiconductor, an experimental bench was established to in vestigate the working performance of a storage box with two semiconductors types, namely, TEC 1-12706 and TEC 1-12712. The twice ex periments started with 2 000 mL ice cubes and the combination with 1 500 mL ice cubes, 3 kg foodstuffs , and 3 bottles of mineral water with a volume of 500 mL respectively in the storage box. Meanwhile, different heat dissipation method of the hot side and fan arrangement of the cold side were both considered during the test. The results show that the TEC 1-12712 with water-cooling has a larger cooling capaci ty than the TEC 1-12706 with air-cooling. Comparing the performance of same type of refrigeration chip using water and air-cooling, it was inferred that the water-cooling has a better cooling effect and a shorter resistance time. Moreover, a better airflow distribution appears when the fan is arranged below the cold side of the refrigeration chip rather than beside it. With the cold storage demand for a volume of 0.1 m , two chips of the TEC 1-12706 type with air-cooling on the hot side are preferred. Over 10 hours, the center temperature of the box was maintained at 60C and the minimum value in the box was approximately 0 0C With the freezing demand, two chips of type TEC 1-12712 with water-cooling on the hot side and the fan below the cold side are preferred. With this application method, the center temperature is controlled below 00C within 3 hours.