低温EXLO样本处理的热传递分析
Kyle W Beggs1, Thomas E Dougherty2, Alain J Kassab1
1Centecorp LLC, Longwood, 147 Parsons Rd, FL 32779, USA.
概括
低温提升样本处理 (cryo-EXLO) 分析显示,样本在液表面上数百微米的临界玻璃体温度以下. 这允许充足的操纵时间,即使没有持续的冷物补充.
科学领域:
- 低温工程 低温工程是什么?
- 材料科学 材料科学 材料科学
- 热传递热量转移的方法
背景情况:
- 低温样本处理对于保持样本完整性至关重要.
- 保持温度低于玻璃过渡点对于冷-EXLO至关重要.
- 需要精确的热分析来定义安全的操纵区域.
研究的目的:
- 在低温条件下 (cryo-EXLO) 在外置提取样本处理过程中分析热传导.
- 将计算热分析与实验温度测量进行比较.
- 为了确定冷-EXLO在冷表面上方不同高度的热活性.
主要方法:
- 使用有限体积溶解器进行导电传热分析.
- 使用K型热电偶进行实验温度测量.
- 在液 (LN2) 冷却表面上进行样本处理的模拟.
主要成果:
- 标本温度在LN2表面上方数百微米以上仍低于临界玻璃体温度.
- 低温穿样本持有器上方的温度在几十分钟内保持在玻璃体温度以下,而无需添加活性冷物质.
- 分析验证了冷-EXLO的可行性,并且具有足够的热率.
结论:
- Cryo-EXLO具有热可行性,可以在冷表面上方提供相当大的工作距离.
- 在没有持续的冷物补充的情况下,可以实现延长操纵时间.
- 随着目前的设置,定期的冷补充可以实现几乎无限的冷-EXLO操纵.
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