二氧化碳微通道蒸发器压降特性的模拟验证

doi:10.11949/j.issn.0438-1157.20161165

化工学报 ›› 2017, Vol. 68 ›› Issue (5): 1866-1873.DOI: 10.11949/j.issn.0438-1157.20161165

二氧化碳微通道蒸发器压降特性的模拟验证

吕静¹, 李昶¹, 石冬冬², 陈启³

1 上海理工大学环境与建筑学院, 上海 200093;
2 中国建筑科学研究院上海分院, 上海 200023;
3 天津三电汽车空调有限公司, 天津 300385

收稿日期:2016-08-18 修回日期:2017-01-13 出版日期:2017-05-05 发布日期:2017-05-05
通讯作者: 李昶
基金资助:
沪江基金项目（D14003）；长三角科技联合攻关项目（10195811000）。

Simulate verification of CO₂ microchannel evaporator pressure drop

LÜ Jing¹, LI Chang¹, SHI Dongdong², CHEN Qi³

1 School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China;
2 China Academy of Building Research, Shanghai Institute, Shanghai 200023, China;
3 Tianjin Sanden Auto Air-conditioning Limited Company, Tianjin 300385, China

Received:2016-08-18 Revised:2017-01-13 Online:2017-05-05 Published:2017-05-05
Supported by:
supported by the Hujiang Foundation of China (D14003) and the Yangtze River Delta Technology Joint Research (10195811000).

摘要/Abstract

摘要：

分析二氧化碳微通道蒸发器的物理结构及二氧化碳两相段及过热段的流动特性，基于有限元分析法，采用分段研究的方法建立微通道二维分布参数模型。研究各参数对二氧化碳在微通道中流动特性的影响，根据模拟结果可得压降主要发生在蒸发器入口经集流管进入扁管处，二氧化碳在过热段压降远小于两相段压降。蒸发压力对扁管内的压降影响很小，随着二氧化碳质量流率增大，压降增大，两相区与过热区分界线右移。对比分析模拟与实验结果，误差在10%之内，验证所建立数学模型的合理性。

关键词: 二氧化碳, 数值模拟, 两相流, 微通道蒸发器, 压降特性, 模型验证

Abstract:

This research aims at analyzing the physical structure of CO₂ microchannel evaporator and the fluidity of CO₂ at two-phase segment and overheat segment. Based on the finite element analysis and the method of segmentation study, the researcher established the microchannel two-dimensional distribution model. The model simulation show that pressure drop mainly happens at the junction of header pipe and flat tube. Pressure drops more at overheat segment than at two-phase segment. Influence of evaporating pressure to the pressure drop of CO₂ at flat tube is small. Boundary line between two-phase segment and overheat segment shifts right, when the CO₂ flow rate increases and the pressure drop grows. Comparative analysis of simulation and experimental results show the error is within 10%, which verifies the reliability of the established model.

Key words: carbon dioxide, numerical simulation, two-phase flow, microchannel evaporator, pressure drop characteristics, model validation

中图分类号:

TK124

吕静, 李昶, 石冬冬, 陈启. 二氧化碳微通道蒸发器压降特性的模拟验证[J]. 化工学报, 2017, 68(5): 1866-1873.

LÜ Jing, LI Chang, SHI Dongdong, CHEN Qi. Simulate verification of CO₂ microchannel evaporator pressure drop[J]. CIESC Journal, 2017, 68(5): 1866-1873.

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二氧化碳微通道蒸发器压降特性的模拟验证

Simulate verification of CO₂ microchannel evaporator pressure drop

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二氧化碳微通道蒸发器压降特性的模拟验证

Simulate verification of CO2 microchannel evaporator pressure drop

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Simulate verification of CO₂ microchannel evaporator pressure drop