Fast transient behavior of thermoelectric coolers with high current pulse and finite cold junction
✍ Scribed by Richard L. Field; Harold A. Blum
- Publisher
- Elsevier Science
- Year
- 1979
- Weight
- 591 KB
- Volume
- 19
- Category
- Article
- ISSN
- 0013-7480
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✦ Synopsis
Experimental, high speed temperature response data were taken on a single stage thermoelectric cooler as it was subjected to a high current, short duration, rectangular d.c. pulse. The pulse was imposed on the cooler as it was operating in its optimum, steady-state, cooled-down condition, After the cooler attained steady-state temperatures of about -40°C with the hot junction at 27c'C, pulse cooling down to about -65C was obtained with many combinations of current and pulse duration. Typical pulse current and duration were 10A for 30msec. The pulse could be repeated about every 15see. Average figure-of-merit of the cooler materials, bismuth and antimony tellurides, was 2.69 x 10 3 K t at 3'C. The cooler was of a practical, common size and configuration, being two elements, standing side-by-side, cormected at the top with a very thin silver bus bar. Element cross-sectional area was 0.0089 cm 2 and element height was 0.5 cm. Every effort was made to reduce the mass of the bus bar, solder, and thermocouple which was used to measure the temperature.
Good correlation was obtained between the experimental data and a computer model solution by the Network Thermal Analyzer (NETHAN) program simulating the experimental conditions. Computer solutions of temperature were carried out for a wide range of cooler sizes, including the experimental model size. an approximately one-tenth size of the experimental model and sizes larger than the experimental model. Thermoelectric coupler Heat conduction, transient Refrigeration Peltier junctions Solid state cooling Direct energy conversion Cold junction temperature.