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首页> 外文期刊>Review of Scientific Instruments >Multi-layer thermoelectric-temperature-mapping microbial incubator designed for geo-biochemistry applications
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Multi-layer thermoelectric-temperature-mapping microbial incubator designed for geo-biochemistry applications

机译:专为地球生物化学应用设计的多层热电温度映射微生物培养箱

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摘要

We demonstrate a novel, vertical temperature-mapping incubator utilizing eight layers of thermoelectric (TE) modules mounted around a test tube. The temperature at each layer of the TE module is individually controlled to simulate the vertical temperature profile of geo-temperature variations with depth. Owing to the constraint of non-intrusion to the filled geo-samples, the temperature on the tube wall is adopted for measurement feedback. The design considerations for the incubator include spatial arrangement of the energy transfer mechanism, heating capacity of the TE modules, minimum required sample amount for follow-up instrumental or chemical analysis, and the constraint of non-intrusion to the geo-samples during incubation. The performance of the incubator is experimentally evaluated with two tube conditions and under four preset temperature profiles. Test tubes are either empty or filled with quartz sand, which has comparable thermal properties to the materials in the geo-environment. The applied temperature profiles include uniform, constant temperature gradient, monotonic-increasing parabolic, and parabolic. The temperature on the tube wall can be controlled between 20 °C and 90 °C with an averaged root mean squared error of 1 °C.
机译:我们演示了一种新颖的,垂直的温度映射培养箱,该培养箱利用八层热电(TE)模块围绕试管安装。单独控制TE模块每一层的温度,以模拟地温随深度变化的垂直温度曲线。由于不干扰已填充的地理样本,因此采用管壁温度作为测量反馈。孵化器的设计考虑因素包括能量转移机制的空间布置,TE模块的加热能力,后续仪器或化学分析所需的最小样本量,以及在孵化过程中不侵入地理样本的限制。在两个试管条件和四个预设温度曲线下,通过实验评估了培养箱的性能。试管为空或充满石英砂,石英砂具有与地质环境中的材料相当的热性能。施加的温度曲线包括均匀,恒定的温度梯度,单调递增的抛物线和抛物线。管壁上的温度可以控制在20°C至90°C之间,平均均方根误差为1°C。

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