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收稿日期:
2024-04-08
修回日期:
2024-06-13
出版日期:
2024-07-23
通讯作者:
陈志豪
作者简介:
田镇岭(1998—),男,硕士研究生,tzl@tju.edu.cn
基金资助:
Zhenling TIAN1(), Zhihao CHEN1,2(), Yoshio UTAKA1,2
Received:
2024-04-08
Revised:
2024-06-13
Online:
2024-07-23
Contact:
Zhihao CHEN
摘要:
基于沸腾现象的浸没式液冷技术适用于芯片(服务器、数据中心等)以及电机冷却等,可实现冷却系统的模块化、集成化和小型化,具有广阔的应用前景。在浸没式液冷系统的开发中,通常希望在不影响系统性能的前提下,尽量减少冷却工质的充填量。本论文提出气泡泵技术,降低冷却系统中液体工质重填量,同时利用沸腾气泡驱动的气液两相上升流作为动力,驱动工质循环冷却整个系统。选取Novec-7100为工质,建立可视化实验系统针对气泡泵驱动的气液两相流动特性、气液输运性能、以及传热性能开展开研究。结果表明,所构建的3 mm × 3 mm微通道型气泡泵冷却系统,在120 mm的冷却液浸没高度下实现了本论文所选取参数范围内的最佳性能,可在0.89~9.98 W/m2的热通量范围内实现两相流循环输运。
中图分类号:
田镇岭, 陈志豪, 宇高义郎. 微通道型气泡泵驱动两相流传热特性[J]. 化工学报, DOI: 10.11949/0438-1157.20240381.
Zhenling TIAN, Zhihao CHEN, Yoshio UTAKA. Study on two-phase flow heat transfer characteristics driven by microchannel bubble pump[J]. CIESC Journal, DOI: 10.11949/0438-1157.20240381.
截面尺寸mm×mm | 长度 mm | 通道数 |
---|---|---|
1 × 1 | 240 | 10 |
2 × 2 | 6 | |
3 × 3 | 5 |
表1 气泡泵尺寸
Table 1 Bubble pump size
截面尺寸mm×mm | 长度 mm | 通道数 |
---|---|---|
1 × 1 | 240 | 10 |
2 × 2 | 6 | |
3 × 3 | 5 |
参数 | 范围 | 最大相对不确定度 | 参数 | 范围 | 最大相对不确定度 |
---|---|---|---|---|---|
流路面积A | 5250 ± 13.6 mm2 | 0.3% | 进口流量Vi | 0 ~ 3.0 mL/s | 6.4% |
电流I | 0.24 ~ 2.80 A | 4.2% | 液体蒸发量Veva | 0 ~ 3.0 mL | 5.3% |
电压U | 30 ~ 200 V | 3.3% | 壁面过热度ΔT | 1.5 ~ 20.0 ℃ | 6.7% |
流量测定时间t | 1.00 ~ 40.00 s | 1.0% | 热通量q | 0 ~ 9.98 W/cm2 | 5.3% |
流量测定体积V | 3.0 ± 0.1 mL | 3.3% | 传热系数α | 0 ~ 8 kW/(cm2·K) | 8.5% |
出口流量Ve | 0 ~ 2.0 mL/s | 3.5% | 泵送高度h | 0 ~ 180 mm | 2.8% |
表 2 实验不确定度
Table 2 Experimental uncertainties
参数 | 范围 | 最大相对不确定度 | 参数 | 范围 | 最大相对不确定度 |
---|---|---|---|---|---|
流路面积A | 5250 ± 13.6 mm2 | 0.3% | 进口流量Vi | 0 ~ 3.0 mL/s | 6.4% |
电流I | 0.24 ~ 2.80 A | 4.2% | 液体蒸发量Veva | 0 ~ 3.0 mL | 5.3% |
电压U | 30 ~ 200 V | 3.3% | 壁面过热度ΔT | 1.5 ~ 20.0 ℃ | 6.7% |
流量测定时间t | 1.00 ~ 40.00 s | 1.0% | 热通量q | 0 ~ 9.98 W/cm2 | 5.3% |
流量测定体积V | 3.0 ± 0.1 mL | 3.3% | 传热系数α | 0 ~ 8 kW/(cm2·K) | 8.5% |
出口流量Ve | 0 ~ 2.0 mL/s | 3.5% | 泵送高度h | 0 ~ 180 mm | 2.8% |
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