DocumentCode :
3315131
Title :
A new concept of porous thermoelectric module using a reciprocating flow for cooling/heating system
Author :
Tada, Shigeru ; Chigo, Ryozeo ; Yoshida, Hideo
Author_Institution :
Dept. of Mech. Eng. Sci., Tokyo Inst. of Technol., Japan
fYear :
1996
fDate :
26-29 March 1996
Firstpage :
264
Lastpage :
268
Abstract :
This paper presents the conceptual design of a novel thermoelectric cooler and/or heater utilizing the heat transfer effect due to forced convection. A porous thermoelectric converter combined with a reciprocating flow system in which the flow direction of air passing through the element is reversed after regular intervals is proposed. This flow system in effect makes the thermal conductivity insignificant and contributes toward the achievement of a high efficient cooler and/or heater. For the first phase, a one-dimensional numerical analysis is performed to examine the detailed characteristics of the device by systematically varying the relevant thermo-fluid parameters. In particular, the flow velocity and the porosity of the thermoelectric elements are the most important parameters which directly affect the system performance. For example in a porous thermoelectric cooler, the lowest temperature of air is approximately -20/spl deg/C for an ambient temperature of 27/spl deg/C, which is attained with a flow velocity u=0.35 m/s, a material porosity /spl epsiv/=0.5, and 2.5 cm thick thermoelectric elements. As a notable feature, the temperature of the cooling section of the system varies considerably with the velocity, and it attains a minimum at u=0.35 m/s. Subsequently, on the basis of the proposed cooling system, an extended concept aimed to realize commercial coolers and/or heaters is briefly discussed.
Keywords :
cooling; forced convection; heating; porous materials; thermal conductivity; thermoelectric devices; -20 C; 2.5 cm; 27 C; air flow direction; cooling system; flow velocity; forced convection; heat transfer effect; heating system; one-dimensional numerical analysis; porous thermoelectric module; reciprocating flow; thermal conductivity; thermo-fluid parameters; thermoelectric cooler; Cooling; Heat transfer; Power generation; Resistance heating; Solids; Surface resistance; Tellurium; Temperature; Thermal conductivity; Thermoelectricity;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Thermoelectrics, 1996., Fifteenth International Conference on
Conference_Location :
Pasadena, CA, USA
Print_ISBN :
0-7803-3221-0
Type :
conf
DOI :
10.1109/ICT.1996.553315
Filename :
553315
Link To Document :
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