直接接触沸腾换热过程连续相特征提取及分布规律

doi:10.12034/j.issn.1009-606X.218229

过程工程学报 ›› 2019, Vol. 19 ›› Issue (4): 704-713.DOI: 10.12034/j.issn.1009-606X.218229

直接接触沸腾换热过程连续相特征提取及分布规律

熊文真¹,徐建新²,黄峻伟^3*

1. 信阳职业技术学院，河南信阳 464000 2. 昆明理工大学复杂有色金属资源清洁利用国家重点实验室，云南昆明 650093 3. 云南农业大学机电工程学院，云南昆明 650100

收稿日期:2018-05-30 修回日期:2018-08-18 出版日期:2019-08-22 发布日期:2019-08-15
通讯作者: 黄峻伟 177692369@qq.com
基金资助:
国家自然科学基金资助项目 (U1302274);国家自然科学基金联合基金;云南省基金

Feature extraction and distribution of continuous phase in direct contact boiling heat transfer process

Wenzhen XIONG¹, Jianxin XU², Junwei HUANG^3*

1. Xinyang Vocational and Technical College, Xinyang, Henan 464000, China 2. State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming, Yunnan 650093, China 3. Faculty of Mechanical and Electrical Engineering, Yunnan Agriculture University, Kunming, Yunnan 650100, China

Received:2018-05-30 Revised:2018-08-18 Online:2019-08-22 Published:2019-08-15
Contact: Jun wei HUANG 177692369@qq.com
Supported by:
Projects (U1302274) supported by the National Science Foundation of China

摘要/Abstract

摘要： 利用支持向量机(SVM)理论构建了有机工质?导热油直接接触沸腾换热过程连续相特征提取方法，获得了导热油和气泡群两相流流型的拓扑结构。对9组正交实验工况获得的两相流图像分别进行连续相特征提取和同调群计算，得到量化连续相数量的1维和0维贝蒂数?1和?0用于粗略估计气泡群数量，并与传统数字图像处理方法的结果比较，对比了换热效率较好和较差情况下形态学开运算对SVM方法的影响，建立了两相流贝蒂数演化规律与换热效率的关联性，比较了传统方法获得的气泡群数量和SVM方法获得的连续相“洞”的数量的演化规律。结果表明，SVM结合贝蒂数方法不仅可准确量化导热油连续相，且可粗略地表征气泡分散相；L6工况(连续相导热油液位高度Z=0.5 m、初始换热温差?T=120℃、分散相工质流率U0=0.04 m/s、连续相导热油流率Uc=0.15 kg/s)下连续相数量变化几乎重叠，相对波动较小，而L4工况(Z=0.5 m, ?T=80℃, U0=0.06 m/s, Uc=0.3 kg/s)下连续相数量偏离程度较大；SVM方法获得的连续相和气泡群个数演化曲线同步，且混合时间相同，?1和?0中位数偏离程度的局部最小值可作为性能指标之一，通过实验验证可优选出换热效果最好的工况。

关键词: 直接接触式换热器, 图像处理, 两相流, 支持向量机, 贝蒂数

Abstract: Based on support vector machine (SVM) theory, a continuous phase feature extraction method for organic working fluid and heat conducting oil direct contact boiling heat transfer was constructed, and the two-phase flow pattern topological structure was obtained. Continuous phase feature extraction and homology group calculation were carried out for two-phase flow images of 9 sets orthogonal experimental conditions, the continuous phase quantizing the quantity index ?1 and the bubbles estimation number index ?0 were obtained, then the traditional digital image processing methods were compared and analyzed. The influence of morphological opening operation on SVM method was compared between in better and worse of the heat transfer efficiency. The number of bubble groups obtained from the traditional method and the quantitative evolution rule of the continuous phase hole obtained by the SVM method were compared. The results showed that SVM combined with Betty number method can not only accurately quantify the continuous phase of heat conduction oil, but also roughly represent the dispersed phase of bubbles. It was found that the number of continuous phase changes almost overlapped and relatively small fluctuation in L6 condition (thermal conductive oil height Z=0.5 m, initial temperature difference ?T=120℃, working medium flow rate U0=0.04 m/s, thermal conductive oil flow rate Uc=0.15 kg/s), but the number of continuous phases deviated from a larger degree in L4 condition (Z=0.5 m, ?T=80℃, U0=0.06 m/s, Uc=0.3 kg/s). The relationship between the evolution rule of Betty number and heat transfer efficiency was established. The evolution curves of continuous phase and bubble group number showed synchronization, and the time of mixing was the same. The local minimum of the median distance between the two numbers can be used as one of the performance indicators, the best heat transfer condition was selected through experiment. This method can be used to study a series of problems concerning the quantitative evolution of two phase flow topological structure.

Key words: direct-contact heat exchanger, image analysis, two-phase flow, support vector machines, betti number

熊文真徐建新黄峻伟. 直接接触沸腾换热过程连续相特征提取及分布规律[J]. 过程工程学报, 2019, 19(4): 704-713.

Wenzhen XIONG Jianxin XU Junwei HUANG. Feature extraction and distribution of continuous phase in direct contact boiling heat transfer process[J]. Chin. J. Process Eng., 2019, 19(4): 704-713.

参考文献

[1] Mahood HB, Sharif AO, Al-Aibi S, Hawkins D, Thorpe R. Analytical solution and experimental measurements for temperature distribution prediction of three-phase direct-contact condenser[J]. Energy, 2014, 67(0): 538-547
[2] Y.J. Hyun, J.H. Hyun, W.G. Chun, Y.H. Kang. An experimental investigation into the operation of a direct contact heat exchanger for solar exploitation[J]. International Communications in Heat and Mass Transfer, 2005, 32(3–4): 425-434
[3] 余胜麟。采用直接接触式换热器的蒸气压缩式热泵系统的初步研究[D]。天津：天津大学，2008
Yu SL. A preliminary study of vapor compression heat pump systems using direct contact heat exchangers [D]. Tianjin University, 2008.
[4] T. Nomura, M. Tsubota, T. Oya, N. Okinaka, T. Akiyama, Heat storage in direct-contact heat exchanger with phase change material, Applied Thermal Engineering, 2013, 50(1): 26-34.
[5] M.N.A. Hawlader, M.A. Wahed, Analyses of ice slurry formation using direct contact heat transfer, Applied Energy, 2009, 86(7C8): 1170-1178
[6] 黄峻伟，王辉涛，王华，徐建新，葛众，ORC直接接触式蒸发器传热性能研究[J]，动力工程学报，2013, (12): 969-973
Huang JW, Wang HT, Wang H, Xu JX, Ge Z, Research on Heat Transfer Performance of ORC Direct Contact Evaporator[J], Journal of Power Engineering,2013, (12): 969-973
[7] Ruzicka M C, Vecer M M, Orvalho S, et al. Effect of surfactant on homogeneous regime stability in bubble column[J]. Chemical Engineering Science, 2008, 63(4):951-967.
[8] Ruzicka M C, Draho? J, Mena P C, et al. Effect of viscosity on homogeneous–heterogeneous flow regime transition in bubble columns[J]. Chemical Engineering Science, 2003, 96(1–3):15-22.
[9] Ruzicka M C, Zahradn??K J, Draho? J, et al. Homogeneous–heterogeneous regime transition in bubble columns[J]. Chemical Engineering Science, 2001, 56(15):4609-4626.
[10] Filho F A B, Ribeiro G B, Caldeira A D. Prediction of subcooled flow boiling characteristics using two-fluid Eulerian CFD model[J]. Nuclear Engineering & Design, 2016, 308:30-37.
[11] Ribeiro C, Lage P. Gas‐Liquid Direct‐Contact Evaporation: A Review[J]. Chemical Engineering & Technology, 2010, 28(10):1081-1107.
[12] Babaei R, Bonakdarpour B, Ein-Mozaffari F. Analysis of gas phase characteristics and mixing performance in an activated sludge bioreactor using electrical resistance tomography[J]. Chemical Engineering Journal, 2015, 279(0): 874-884.
[13] Harrison S T L, Stevenson R, Cilliers J J. Assessing solids concentration homogeneity in Rushton-agitated slurry reactors using electrical resistance tomography (ERT)[J]. Chemical Engineering Science, 2012, 71(13): 392-399.
[14] 庞明军, 徐一丹, 魏进家. 管道泡状流相分布模式和分布机理研究进展[J]. 化工进展, 2014, 33(11): 2829-2842.
Pang M J, Xu Y D, Wei J J. Phase distribution pattern and mechanism of bubbly flow in pipes[J]. Chemical Industry and Engineering Progress
[15] Dong Z, Xu J, Jiang F, et al. Numerical study of vapor bubble effect on flow and heat transfer in microchannel[J]. International Journal of Thermal Sciences, 2012, 54(1): 22-32.
[16] Xu J L, Zhang X M. Start-up and steady thermal oscillation of a pulsating heat pipe[J]. Heat and Mass Transfer, 2005, 41(8): 685-694.
[17] Chen H, Xu J, Li Z, et al. Flow pattern modulation in a horizontal tube by the passive phase separation concept[J]. International Journal of Multiphase Flow, 2012, 45: 12-23.
[18] Xu J, Wang H, Fang H. Multiphase mixing quantification by computational homology and imaging analysis[J]. Applied Mathematical Modelling, 2011, 35(5): 2160-2171.
[19] Huang J, Xu J, Sang X, et al. Quantifying the synergy of bubble swarm patterns and heat transfer performance using computational homology[J]. International Journal of Heat and Mass Transfer, 2014, 75(4): 497-503.

直接接触沸腾换热过程连续相特征提取及分布规律

Feature extraction and distribution of continuous phase in direct contact boiling heat transfer process

PDF

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 15

编辑推荐

Metrics

[1]	田玉龙杨秀山孔行健许德华张志业. 磷石膏颗粒湍动流化特性实验及模拟[J]. 过程工程学报, 2022, 22(9): 1224-1231.
[2]	孟辉波王建宝禹言芳王宗勇吴剑华. Q型静态混合器内液滴群分散特性[J]. 过程工程学报, 2022, 22(3): 338-346.
[3]	刘彪姚秀颖孟振亮刘梦溪. 高低并列式重油催化裂化汽提器挡板的结构优化[J]. 过程工程学报, 2022, 22(1): 22-31.
[4]	刘洋郭中山赵元琪管小平杨宁. 洗涤冷却室气液两相流的模拟及结构优化[J]. 过程工程学报, 2022, 22(1): 32-40.
[5]	邢雷蒋明虎赵立新谯意韩国鑫. 水平圆管内油水两相旋流分隔性能分析与评价[J]. 过程工程学报, 2021, 21(5): 558-566.
[6]	何奕波郭文科李怡宏刘光明崔鑫. 铁浴反应器多段侧吹混合特性数值模拟[J]. 过程工程学报, 2021, 21(12): 1430-1439.
[7]	王志奇陈柳明肖炳英谢宝琦. 重油燃烧器Y型喷嘴气液两相流动与雾化特性模拟[J]. 过程工程学报, 2021, 21(10): 1167-1176.
[8]	郝思佳范怡平汪泉宇赵亚飞. 气液逆流接触洗涤器两相洗涤效果和流动特性[J]. 过程工程学报, 2020, 20(4): 390-399.
[9]	李希铭牛胜利曲同鑫韩奎华路春美王永征. 基于颗粒动力学理论的搅拌器中固液流动的数值模拟[J]. 过程工程学报, 2020, 20(3): 265-275.
[10]	黎义斌梁开一李正贵. 基于流固耦合的斜轴式搅拌器水力性能数值分析[J]. 过程工程学报, 2020, 20(12): 1424-1431.
[11]	马树辉王若瑾王德武刘燕张少峰. Geldart A类颗粒节涌床气固流动特性的实验及模拟[J]. 过程工程学报, 2019, 19(5): 967-974.
[12]	陈飞国葛蔚. 耦合粗粒化离散颗粒法和多相物质点法的气固两相流模拟[J]. 过程工程学报, 2019, 19(4): 651-660.
[13]	刘凤霞李永强许晓飞董鑫刘志军. 微曝氧化沟气液两相传质模型构建及传质影响因素分析[J]. 过程工程学报, 2019, 19(4): 676-684.
[14]	陈鑫肖颀管小平杨宁. 内置涡流发生器的管内过冷沸腾与强化换热的模拟[J]. 过程工程学报, 2019, 19(3): 524-532.
[15]	雷杰王昱马明李培生张莹. 基于FTM方法的双气泡融合特性模拟[J]. 过程工程学报, 2019, 19(2): 263-270.