两级半导体制冷器.pdf

A two-stage cuboid-styled thermoelectric cooler with switched polarity X.C. Xuan, K.C.Ng, C. Yap, H.T. Chua2 Mechanical Engineering Department, National University of Singapore, 10 Kent Ridge Crescent, Singapore 1 19260, Singapore Email: mpexxco.nus.edu.sn(Xiangchun Xuan) Faculty of Engineering, National University of Singapore, 10 Kent Ridge Crescent, Singapore 1 17576 Abstract Dimensions of thermoelements: area, A = 1.96x 10 m z , This paper introduces a two-stage cuboid-styled and length, L = 1.14x 10 m , and geometric factor, thermoelectric (TE) cooler, which is simply formed by linking G = A / L =1.71xlO-m; two similar single-stage commercial TE modules serially in thermal cascade. Superior to a conventional two-stage Dimensions of Ceramic end plates: area, pyramid-styled TE cooler, the cuboid-styled cooler has Ac = 1.6x 10. mz , and thickness, 1, = 7.5 x lo4 m . switched polarity, which means that the cooling rate and Thermal conductivity k, of ceramic is 35.3Wm-K-l . coefficient of performance (COP ) can keep constant when its supplied electric currents are alternated. As an example, a (a) single-stage TE module of MELCOR is chosen for performance comparison between single and two-stage coolers. Practical conditions are accounted for by c