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首页> 外文期刊>International Journal of Heat and Mass Transfer >High switching ratio variable-temperature solid-state thermal switch based on thermoelectric effects
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High switching ratio variable-temperature solid-state thermal switch based on thermoelectric effects

机译：基于热电效应的高开关比可变温度固态热敏开关

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摘要

The switching ratio, the ratio between the thermal conductance in its off and on states, of a thermal switch is a critical design parameter of such a device. Here, we propose Peltier modules as a type of all-solid-state thermal switch that can operate over a wide temperature range and with an adjustable switching ratio. Calculations show that the switching ratio depends only on thermoelectric figure of merit and temperature bounds. A Peltier couple is constructed from Bi2Te3-based material and characterized by its thermal conductance and response time in the open condition and under an optimal activation current. The switching ratio diverges at small temperature differences with record-high measured values, an order of magnitude larger than achieved by other solid-state devices near room temperature. Materials with a high figure of merit could produce even larger switching ratios over higher temperature differences. (C) 2019 Elsevier Ltd. All rights reserved.
机译：热开关的开关比，即导通状态下的热导率之间的比率，是这种设备的关键设计参数。在这里，我们提出Peltier模块作为一种全固态热敏开关，它可以在很宽的温度范围内工作，并且开关比可调。计算表明，开关比仅取决于热电性能和温度范围。珀尔帖对是由基于Bi2Te3的材料制成的，其特点是在开放条件下和最佳激活电流下的热导率和响应时间。开关比在较小的温差下会以创纪录的高测量值发散，这比室温附近其他固态设备所获得的测量值大一个数量级。具有较高品质因数的材料可能会在更高的温度差下产生更大的开关比。 （C）2019 Elsevier Ltd.保留所有权利。

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