Enhancement on steam dropwise condensation heat transfer with superhydrophobic surfaces of PVDF hollow fiber heat exchange tubes

CHAI Yexia; CHEN Huayan; JIA Yue; LI Dandan; WU Chunrui; LYU Xiaolong

doi:10.11949/j.issn.0438-1157.20181053

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Enhancement on steam dropwise condensation heat transfer with superhydrophobic surfaces of PVDF hollow fiber heat exchange tubes

Fluid dynamics and transport phenomena | 更新时间：2026-07-24

- Enhancement on steam dropwise condensation heat transfer with superhydrophobic surfaces of PVDF hollow fiber heat exchange tubes
- CIESC Journal Vol. 70, Issue 4, Pages: 1331-1339(2019)
- 作者机构：
  
  1.省部共建分离膜与膜过程国家重点实验室，天津 300387
  2.天津工业大学环境与化学工程学院，天津 300387
  3.天津工业大学材料科学与工程学院，天津 300387
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20181053
  CLC： TQ 028.8
- Received：19 September 2018，
  
  Revised：2018-11-01，
  
  Online First：15 June 2020，
  
  Published：12 April 2019
- 稿件说明：
移动端阅览
柴叶霞, 陈华艳, 贾悦, 李丹丹, 武春瑞, 吕晓龙. PVDF中空纤维换热管超疏水表面强化蒸气滴状冷凝传热[J]. 化工学报, 2019, 70(4): 1331-1339

CHAI Yexia, CHEN Huayan, JIA Yue, LI Dandan, WU Chunrui, LYU Xiaolong. Enhancement on steam dropwise condensation heat transfer with superhydrophobic surfaces of PVDF hollow fiber heat exchange tubes[J]. CIESC Journal, 2019, 70(4): 1331-1339
柴叶霞, 陈华艳, 贾悦, 李丹丹, 武春瑞, 吕晓龙. PVDF中空纤维换热管超疏水表面强化蒸气滴状冷凝传热[J]. 化工学报, 2019, 70(4): 1331-1339 DOI： 10.11949/j.issn.0438-1157.20181053.

CHAI Yexia, CHEN Huayan, JIA Yue, LI Dandan, WU Chunrui, LYU Xiaolong. Enhancement on steam dropwise condensation heat transfer with superhydrophobic surfaces of PVDF hollow fiber heat exchange tubes[J]. CIESC Journal, 2019, 70(4): 1331-1339 DOI： 10.11949/j.issn.0438-1157.20181053.

摘要

为了提高塑料换热管的传热性能，通过两步涂覆法制备了具有超疏水表面的复合塑料换热管。首先采用多孔PVDF中空纤维膜为支撑层，以导热材料纳米ZnO填充聚二甲基硅氧烷（PDMS）为皮层，制备了具有致密外表皮层的复合塑料换热管。其次为了强化蒸气的滴状冷凝传热，通过考察正硅酸乙酯含量，氨水含量等条件的影响，制备出了具有超疏水表面的PVDF复合塑料换热管。结果表明，所制备的换热管表面接触角可达154°，与熔融法及NIPS法制备的换热管相比，总传热系数可提高85.3%～147.3%。

Abstract

To improve the heat transfer performance of the plastic heat exchange tube

a composite plastic heat exchange tube with a superhydrophobic surface was prepared by a two-step coating method. Firstly

the porous polyvinylidene fluoride (PVDF) hollow fiber membrane was used as the supporting layer

and polydimethylsiloxane (PDMS) was filled with thermal conductive material nano-ZnO as the skin layer to prepare the composite plastic heat exchange tube with a dense outer skin layer. Secondly

the PVDF composite plastic heat exchange tube with superhydrophobic surface was prepared by investigating the influence of teraethoxysilane (TEOS) and ammonia content

which enhanced the dropwise condensation heat transfer performance of steam. The results showed that the outer surface contact angle of the prepared heat exchange tube can reach 154°. Compared with the heat exchange tubes prepared by the melting method and the NIPS method

the total heat transfer coefficient could be increased by 85.3%—147.3%.

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references

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