Simulation of Heat and Mass Transfer in Solution Heat Exchanger with Hollow Fiber Membrane

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Simulation of Heat and Mass Transfer in Solution Heat Exchanger with Hollow Fiber Membrane

更新时间：2025-07-09

- Simulation of Heat and Mass Transfer in Solution Heat Exchanger with Hollow Fiber Membrane
- Vol. 43, Issue 3, Pages: 36-41(2009)
- 作者机构：
  
  西安交通大学能源与动力工程学院,西安,710049
- 作者简介：
- 基金信息：
- DOI：
  CLC： TB61;TQ028.8
- Online First：10 March 2009，
  
  Published：2009
- 稿件说明：
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Simulation of Heat and Mass Transfer in Solution Heat Exchanger with Hollow Fiber Membrane[J]. 2009, 43(3): 36-41.
DOI：

Simulation of Heat and Mass Transfer in Solution Heat Exchanger with Hollow Fiber Membrane[J]. 2009, 43(3): 36-41. DOI：

摘要

提出了一种适用于溴化锂吸收式制冷系统的新型溶液热交换器——中空纤维膜溶液热交换器.该溶液热交换器不同于传统的间壁式溶液热交换器

在高温浓溶液和低温稀溶液进行热量传递的同时

存在水蒸气的质量传递

质量传递的方向取决于膜两侧的水蒸气压差.应用分布参数法对溶液热交换器建立了溶液流动的传热、传质数学模型

并对顺流和逆流布置的流动过程进行了比较.研究结果表明:当溶液热交换器逆流布置时

沿程温差均匀

热量传递稳定

水蒸气由高温侧向低温侧的持续传质作用不但进一步浓缩了浓溶液

而且稀释了稀溶液

因此减小了发生器的热负荷和吸收器的冷负荷.

Abstract

A solution heat exchanger with hollow fiber membrane applied in lithium bromide absorption systems was proposed. Unlike in conventional dividing wall type heat exchangers

water vapor mass transfer occurs with heat transfer and the direction of mass transfer depends on the water vapor pressure difference between the two sides of membrane. A mathematical model of heat transfer and mass transfer process in the membrane heat exchanger was established with the distributed parameter method

and its performances with the parallel-flow mode and the counter-flow mode were compared. The simulation result shows that with the counter-flow mode

the temperature difference is uniform along the flow path

and heat transfer and mass transfer are more steady. The rich solution can be concentrated and the weak solution can be diluted further

leading to lower heat loads of the generator and the absorber.

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Keywords

references

GENSSLE A, STEPHAN K.Analysis of the process characteristics of an absorption heat transformer with compact heat exchangers and the mixture TFE-E181[J]. International Journal of Thermal Sciences,2000,39(1): 30-38.

DE VEGA M, ALMENDROS-IBANEZ J A, RUIZ G. Performance of a LiBr-water absorption chiller operating with plate heat exchangers [J]. Energy Conversion and Management, 2006, 47(18/19): 3393-3407.

龙剑. 溴化锂吸收式制冷系统溶液热交换器的传热性能研究 [J]. 制冷与空调, 2006, 6(3): 68-70.

LONG Jian. Research on heat transfer performance of solution heat exchanger of lithium bromide absorption refrigeration system [J]. Refrigeration and Air Conditioning, 2006, 6(3): 68-70.

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阎建民,马润宇. 用于膜蒸馏的中空纤维膜组件优化[J]. 化工学报, 2000, 51(6): 827-831.

YAN Jianmin, MA Runyu. Optimal design of hollow fiber module for membrane distillation [J]. Journal of Chemical Industry and Engineering(China), 2000, 51(6): 827-831.

MARTINEZ L, FLORIDO-DIAZ F J, HERNANDEZ A, et al. Characterization of three hydrophobic porous membranes used in membrane distillation: modelling and evaluation of their water vapour permeabilities [J]. Journal of Membrane Science, 2002, 203(1/2): 15-27.

QTAISHAT M, MATSUURA T, KRUCZEK B, et al. Heat and mass transfer analysis in direct contact membrane distillation [J]. Desalination, 2008, 219(1/3): 272-292.

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