化工学报 ›› 2021, Vol. 72 ›› Issue (S1): 77-83.doi: 10.11949/0438-1157.20201550

• 流体力学与传递现象 • 上一篇    下一篇

用于微通道换热器的循环流道分流器的设计方法与应用效果

燕子腾1(),吴国明1,庄大伟1,丁国良1(),曹法立2,孟建军2   

  1. 1.上海交通大学制冷与低温工程研究所,上海 200240
    2.青岛海信日立空调系统有限公司,山东 青岛 266510
  • 收稿日期:2020-11-02 修回日期:2021-01-12 出版日期:2021-06-20 发布日期:2021-06-20
  • 通讯作者: 丁国良 E-mail:ZitengYan@sjtu.edu.cn;glding@sjtu.edu.cn
  • 作者简介:燕子腾(1997—),男,硕士研究生,ZitengYan@sjtu.edu.cn

Design method and application effects of cyclic channel distributor for micro-channel heat exchangers

YAN Ziteng1(),WU Guoming1,ZHUANG Dawei1,DING Guoliang1(),CAO Fali2,MENG Jianjun2   

  1. 1.Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, Shanghai 200240, China
    2.Qingdao Hisense Hitachi Air -conditioning System Co. , Ltd. , Qingdao 266510, Shandong, China
  • Received:2020-11-02 Revised:2021-01-12 Published:2021-06-20 Online:2021-06-20
  • Contact: DING Guoliang E-mail:ZitengYan@sjtu.edu.cn;glding@sjtu.edu.cn

摘要:

在家用和商用空调领域中常采用分流器实现多路微通道换热器中制冷剂的分流。分流器应用中最普遍的问题是制冷剂分流不均匀。提出一种利用循环流道实现制冷剂均匀分流的分流器。在传统圆筒式分流器的基础上,设计了循环流道,使制冷剂形成离散泡状流并均匀分流到每根扁管中。新型分流器的关键几何尺寸包括喷孔直径和上行流道水力直径。通过离散泡状流的形成条件推导出喷孔直径的计算公式;通过两相流循环流动的形成条件推导出上行流道水力直径的计算公式。给出新型分流器的设计实例,并通过试验对分流器性能进行验证。试验结果表明分流器进口制冷剂质量流量为14.0、18.0、22.0 g/s时,新型分流器的不均匀度分别为比传统分流器下降46.8%、32.0%、24.4%。

关键词: 流动, 气液两相流, 微通道, 分流器, 均匀分流, 循环流道, 离散泡状流

Abstract:

Distributors are widely used in room and commercial air conditioners for the refrigerant flow distribution among multi-paths of micro-channel heat exchangers. The most common problem in the distributor application is the non-uniform distribution of refrigerant flow. In this paper a novel distributor with a cyclic channel was proposed to achieve the uniform refrigerant distribution. Based on a traditional cylinder-type distributor, the cyclic channel was designed to construct a dispersed bubble flow pattern and allocate the dispersed bubble flow evenly into each flat tube. The key geometric size of the novel distributors includes the diameter of spray holes and the hydraulic diameter of upward channel. In this paper, the spray diameter is deduced from the formation criterion of dispersed bubble flow and the hydraulic diameter of upward channel is deduced from the formation condition of circulating flow. A design case is provided by using the deduced equations, and the distribution performance of the proposed distributor is tested by experiments. The experimental results prove that the unevenness of the proposed distributor is 46.8%, 32.0% and 24.4% lower than that of the traditional distributor respectively when the mass flow rate of inlet is 14.0, 18.0 and 22.0 g/s.

Key words: flow, gas-liquid flow, microchannels, distributor, uniform distribution, cyclic channel, dispersed bubble flow

中图分类号: 

  • TB 61+1

图1

空调系统中分流器的结构"

图2

通过循环流道实现离散泡状流均匀分流"

图3

实现均匀分流的关键参数"

图4

喷孔内离散泡状流的转化条件"

图5

通过设计循环流道实现均匀分流"

图6

分流器性能试验装置"

图7

不同质量流量下的传统和新型分流器的分流性能"

1 刘巍, 朱春玲. 分流板结构对微通道平行流蒸发器性能的影响[J]. 化工学报, 2012, 63(3): 761-766.
Liu W, Zhu C L. Effects of deflector structure on performance of micro-channel evaporator with parallel flow [J]. CIESC Journal, 2012, 63(3): 761-766.
2 Aljuwayhel N F, Reindl D T, Klein S A, et al. Comparison of parallel- and counter-flow circuiting in an industrial evaporator under frosting conditions [J]. International Journal of Refrigeration, 2007, 30(8): 1347-1357.
3 Borhani N, Thome J R. Intermittent dewetting and dryout of annular flows [J]. International Journal of Multiphase Flow, 2014, 67: 144-152.
4 高原, 田怀璋, 曾艳, 等. 改进型分液器的流量分配性能[J]. 制冷与空调, 2002, 2(4): 12-14.
Gao Y, Tian H Z, Zeng Y, et al. Research for performance of liquid-distributor [J]. Refrigeration and Air Conditioning, 2002, 2(4): 12-14.
5 Hu K Y, Zhu J L, Zhang W, et al. Effects of evaporator superheat on system operation stability of an organic Rankine cycle [J]. Applied Thermal Engineering, 2017, 111: 793-801.
6 Pollock D T, Yang Z H, Wen J T. Dryout avoidance control for multi-evaporator vapor compression cycle cooling [J]. Applied Energy, 2015, 160: 266-285.
7 Zhang X Y, Zhang X Q, Chen Y G, et al. Heat transfer characteristics for evaporation of R417A flowing inside horizontal smooth and internally grooved tubes [J]. Energy Conversion and Management, 2008, 49(6): 1731-1739.
8 高晶丹, 丁国良, 胡海涛, 等. 不同结构分流器的分流性能比较[J]. 制冷技术, 2013, 33(3): 24-26, 30.
Gao J D, Ding G L, Hu H T, et al. Comparison of diffluence performance for distributors with different structures [J]. Chinese Journal of Refrigeration Technology, 2013, 33(3): 24-26, 30.
9 Elgozali A, Linek V, Fialová M, et al. Influence of viscosity and surface tension on performance of gas-liquid contactors with ejector type gas distributor [J]. Chemical Engineering Science, 2002, 57(15): 2987-2994.
10 Yoshioka S, Kim H, Kasai K. Performance evaluation and optimization of a refrigerant distributor for air conditioner [C]// Proceedings of ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference Collocated with the ASME 2007 InterPACK Conference. Vancouver, British Columbia, Canada, 2009: 603-609.
11 高扬, 翁晓敏, 丁国良, 等. 适合小管径空调器的分配器分流性能评价与结构优化[J]. 制冷学报, 2016, 37(2): 93-100.
Gao Y, Weng X M, Ding G L, et al. Distribution performance assessment and structure optimization of distributor applied in small-diameter air conditioner [J]. Journal of Refrigeration, 2016, 37(2): 93-100.
12 Li G, Frankel S, Braun J E, et al. Application of CFD models to two-phase flow in refrigerant distributors [J]. HVAC&R Research, 2005, 11(1): 45-62.
13 马南. 空调制冷系统用分流器结构分析[J]. 制冷与空调, 2006, 6(2): 82-84.
Ma N. Structure analysis of divider for refrigeration and air-conditioning system [J]. Refrigeration and Air-Conditioning, 2006, 6(2): 82-84.
14 刘巍, 朱春玲. 微通道换热器内分流板流量分配特性[J]. 农业机械学报, 2012, 43(12): 257-261.
Liu W, Zhu C L. Flow distribution characteristics of deflector in micro channel heat exchanger [J]. Transactions of the Chinese Society for Agricultural Machinery, 2012, 43(12): 257-261.
15 Zivi S M. Estimation of steady-state steam void-fraction by means of the principle of minimum entropy production [J]. Journal of Heat Transfer, 1964, 86(2): 247-251.
16 Ma X K, Ding G L, Zhang P, et al. Experimental validation of void fraction models for R410A air conditioners [J]. International Journal of Refrigeration, 2009, 32(5): 780-790.
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