关于新型迷你通道超临界CO2热气冷却器的实验研究
Jiawei Jiang1,2, Shiqiang Liang1,3, Xiang Xu1,4
1Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China.
Micromachines
|May 27, 2023
概括
这项研究详细介绍了一种新的螺旋板迷你通道气体冷却器,用于超临界二氧化碳 (CO2). 通过增加二氧化碳质量流和入水温度,实现最佳性能,垂直方向可增强热传递.
科学领域:
- 热力学和热传递 热力学和热传递
- 流体动力学 流体动力学
- 机械工程 机械工程
背景情况:
- 超临界二氧化碳 (CO2) 是用于冷却系统的新兴工作流体.
- 迷你通道换热器提供了增强的热传输,但需要谨慎的设计.
- 螺旋板热交换器为气体冷却应用提供了紧的解决方案.
研究的目的:
- 为了实验性地研究一款新型螺旋板小型通道气体冷却器的传热和压力下降特性.
- 为了确定最佳的运行条件,增强热传输.
- 开发和验证适合这种特定气体冷却器设计的热传递相关性.
主要方法:
- 使用超临界CO2和水的螺旋板迷你通道气体冷却器的实验测试.
- 二氧化碳质量流量,入水温度和冷却器方向 (垂直与水平) 的系统变化.
- 开发Matlab程序以验证传热相关性,包括张的方法.
主要成果:
- 增加CO2质量流量显著提高总体传热系数在0.175kg·s-1和7.9MPa的水质量流速.
- 更高的进水温度提高了整体的传热系数.
- 气体冷却器的垂直方向与水平方向相比,产生更高的整体传热系数.
结论:
- 通过实验研究确定了新型螺旋板迷你通道气冷器的合适的传热相关性.
- 这些发现提供了有价值的数据,并为未来类似气体冷却系统的设计和优化提供了参考.
- 了解操作参数和方向的影响对于高效的超临界CO2冷却应用至关重要.
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