4GOLDSMID H J. Possibilities for improvement in ther- moel- ectric refrigeration[C]. IEEE Staff 18th International Conference on Thermoelectrics. Baltimore: 1EEE, 1999, 531- 535.
5DAI Y J, WANG R Z, NIL. Experimental investiga- tion on a thermoelectric refrigerator driven by solar cells[J]. Renewable Energy, 2003,28 (6) : 949-959.