Pressure oscillation characteristics of direct contact condensation in a microchannel

doi:10.16085/j.issn.1000-6613.2023-1026

Chemical Industry and Engineering Progress ›› 2024, Vol. 43 ›› Issue (2): 602-608.DOI: 10.16085/j.issn.1000-6613.2023-1026

• Column: multiphase flow test • Previous Articles Next Articles

Pressure oscillation characteristics of direct contact condensation in a microchannel

LI Shuqian¹^,²^,³(), ZHANG Chaoqun⁴, ZHANG Dong⁵, HOU Nana¹^,²^,³, ZHANG Meng⁵, MA Kunru⁵

^1.The Civil Engineering College, Hebei University of Water Resources and Electric Engineering, Cangzhou 061001, Hebei, China
^2.Hebei Technology Innovation Center of Phase Change Thermal Management of Internet Data Center, Cangzhou 061001, Hebei, China
^3.Cangzhou Technology Innovation Center of Thermal Storage and Low-grade Waste Heat Utilization of Electromagnetic Heating, Cangzhou 061001, Hebei, China
^4.College of Energy Engineering, Hebei University of Architecture, Zhangjiakou 075132, Hebei, China
^5.The Construction Engineering College, Hebei University of Science and Technology, Shijiazhuang 050018, Hebei, China

Received:2023-06-21 Revised:2023-08-07 Online:2024-03-07 Published:2024-02-25
Contact: LI Shuqian

微细通道内蒸汽直接接触间歇凝结压力振荡特性

李树谦¹^,²^,³(), 张超群⁴, 张东⁵, 侯娜娜¹^,²^,³, 张猛⁵, 马坤茹⁵

^1.河北水利电力学院土木工程系，河北沧州 061001
^2.河北省数据中心相变热管理技术创新中心，河北沧州 061001
^3.沧州市储热及低品位余热利用型电磁供热技术创新中心，河北沧州 061001
^4.河北建筑工程学院能源工程系，河北张家口 075132
^5.河北科技大学建筑工程学院，河北石家庄 050018

通讯作者: 李树谦
作者简介:李树谦（1982—），博士，副教授，硕士研究生导师，研究方向为相变流动与传热。E-mail：lsqtcc@163.com。
基金资助:
国家自然科学基金(51976052);河北省自然科学基金(E2020412176)

Abstract

Abstract:

In order to investigate the instantaneous pressure oscillation characteristics of steam direct contact intermittent condensation under microscale conditions, experiments and spectral analysis were conducted on the measurement of intermittent condensation pressure in a T-shaped microchannel. It was found that under the working conditions of steam temperature 100℃, steam mass flow rate 0.45g/min, supercooled water temperature 40℃ and supercooled water mass flow rate 12.65g/min, the time domain signal of intermittent condensation pressure fluctuates between -29.5kPa and 8.8kPa, and the probability density of the pressure value near 2.5kPa was the largest. In addition, through spectrum analysis, it was found that the first dominant frequency of the pressure frequency domain signal was 10Hz, which was similar to the number of cycles experienced by intermittent condensation within one second.

Key words: microchannels, direct contact, chugging, pressure oscillation, spectrum analysis

摘要：

为探究微尺度条件下蒸汽直接接触间歇凝结瞬时压力振荡特性，开展了T型微细通道内间歇凝结压力测量实验及频谱分析等。研究发现，在蒸汽温度100℃、蒸汽质量流量0.45g/min、过冷水温度40℃以及过冷水质量流量12.65g/min工况下，间歇凝结压力时域信号在-29.5～8.8kPa之间波动，压力值在2.5kPa附近的概率密度最大。此外，通过频谱分析发现压力频域信号的第一主频为10Hz，与1s内间歇凝结经历的周期数量相近。

关键词: 微细通道, 直接接触, 间歇凝结, 压力振荡, 频谱分析

CLC Number:

TK124

LI Shuqian, ZHANG Chaoqun, ZHANG Dong, HOU Nana, ZHANG Meng, MA Kunru. Pressure oscillation characteristics of direct contact condensation in a microchannel[J]. Chemical Industry and Engineering Progress, 2024, 43(2): 602-608.

李树谦, 张超群, 张东, 侯娜娜, 张猛, 马坤茹. 微细通道内蒸汽直接接触间歇凝结压力振荡特性[J]. 化工进展, 2024, 43(2): 602-608.

Figures/Tables 12

References 23

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设备名称	规格参数
精密汽化器	CEM-001：0.001~0.1g/min，波动<3%，无液相死体积，完全汽化，蒸汽接触材质SUS316L，温度100~250℃，精度±1℃
双柱塞泵	PSP3000：0.5~3000μL/min，输送精度3‰
蠕动泵	BT100-2J：0.002~380mL/min
高频微压传感器	CYG41000T：-40~40kPa，精度0.25%FS
温控模块	AI7048，4路PID控温
24V开关电源	6ES7307-1KA02-0AA0，10A
固态继电器	G3NA-220B，SSR-20DA，3~32V DC，220V AC

设备名称	规格参数
精密汽化器	CEM-001：0.001~0.1g/min，波动<3%，无液相死体积，完全汽化，蒸汽接触材质SUS316L，温度100~250℃，精度±1℃
双柱塞泵	PSP3000：0.5~3000μL/min，输送精度3‰
蠕动泵	BT100-2J：0.002~380mL/min
高频微压传感器	CYG41000T：-40~40kPa，精度0.25%FS
温控模块	AI7048，4路PID控温
24V开关电源	6ES7307-1KA02-0AA0，10A
固态继电器	G3NA-220B，SSR-20DA，3~32V DC，220V AC

参数	数值
过冷水温度T_f/℃	40
过冷水质量流量Q_f/g·min^-1	12.65
蒸汽温度T_s/℃	100
蒸汽质量流量Q_s/g·min^-1	0.45
当地大气压p₀/kPa	100.7
压力采样率/Hz	40000
高速摄像机帧数/帧·s^-1	5000

参数	数值
过冷水温度T_f/℃	40
过冷水质量流量Q_f/g·min^-1	12.65
蒸汽温度T_s/℃	100
蒸汽质量流量Q_s/g·min^-1	0.45
当地大气压p₀/kPa	100.7
压力采样率/Hz	40000
高速摄像机帧数/帧·s^-1	5000

参数	不确定度
蒸汽温度	±0.56℃
过冷水温度	±0.83℃
蒸汽质量流量	0.3%
过冷水质量流量	3%
动态压力	4.2%

Pressure oscillation characteristics of direct contact condensation in a microchannel

微细通道内蒸汽直接接触间歇凝结压力振荡特性

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References 23

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