Heat and Mass Transfer during Solution Crystallization in a Single Honeycomb Cell

Liang Yinke; Wang Gang; Liang Yuying; Zhao Yonghan; Cui Jingyue

doi:10.12465/issn.0253-4339.20260720005

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Heat and Mass Transfer during Solution Crystallization in a Single Honeycomb Cell

更新时间：2026-09-24

- Heat and Mass Transfer during Solution Crystallization in a Single Honeycomb Cell
- Journal of Refrigeration Pages: 1-10(2026)
- 作者机构：
  
  1.北京建筑大学环境与能源工程学院北京 100044
  2. 北京优奈特能源工程技术有限公司北京 100023
- 作者简介：
  
  Wang Gang， male， associate professor， School of Environment and Energy Engineering， Beijing University of Civil Engineering and Architecture， E-mail： wanggang@bucea.edu.cn. Research fields： absorption heat pumps and thermochemical energy storage technology.
- 基金信息：
- DOI：10.12465/issn.0253-4339.20260720005
  CLC： TK02;TK115
- Received：20 July 2026，
  
  Revised：2026-08-17，
  
  Accepted：18 August 2026，
  
  Online First：24 September 2026，
- 稿件说明：
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梁胤轲，王刚，梁玉莹，等. 单蜂窝槽内溶液结晶热质传递的研究［J］. 制冷学报，XXXX，XX（XX）：1-10.

Liang Yinke，Wang Gang，Liang Yuying，et al. Heat and Mass Transfer during Solution Crystallization in a Single Honeycomb Cell［J］. Journal of Refrigeration，XXXX，XX（XX）：1-10.
梁胤轲，王刚，梁玉莹，等. 单蜂窝槽内溶液结晶热质传递的研究［J］. 制冷学报，XXXX，XX（XX）：1-10. DOI： 10.12465/issn.0253-4339.20260720005.

Liang Yinke，Wang Gang，Liang Yuying，et al. Heat and Mass Transfer during Solution Crystallization in a Single Honeycomb Cell［J］. Journal of Refrigeration，XXXX，XX（XX）：1-10. DOI： 10.12465/issn.0253-4339.20260720005.

摘要

溶液结晶蓄能是热化学蓄能的一种类型，是实现太阳能、工业余热与需求侧匹配的关键技术。本文以溴化锂溶液为研究工质，搭建蜂窝结构溶液结晶蓄能实验系统，建立其热质传递数学模型，实验研究溶液结晶蓄能的演化规律，数值研究热源温度和溶液初始质量分数对热质传递特性的影响，并引入传质Péclet数表征界面蒸发与内部扩散的内在机制。结果表明：单蜂窝槽内溶液结晶过程可分为溶液浓缩、晶-液共存和晶体脱水3个阶段；热源温度由120 ℃升至140 ℃时，传热通量和传质通量的峰值分别由2.465×10

W/m

增至3.512×10

W/m

、由1.680 mol/（m

·s）增至2.572 mol/（m

·s）；溶液初始质量分数由53%增至57%时，传质通量提高，但受黏度升高导致液相扩散受限，使传质系数下降；当传质Péclet数大于1，即界面蒸发强于液相内部扩散补偿时，溴化锂易在气液界面富集并诱发优先结晶。本研究可为蜂窝式溶液结晶蓄能单元的传热传质优化提供理论依据。

Abstract

Solution crystallization energy storage can enhance the thermochemical storage density by coupling the solution concentration with solid–liquid phase change. In this study， a honeycomb LiBr-H

O crystallization energy storage system was developed， and a single-cell heat- and mass-transfer model was developed. The experiments were used to study the crystallization evolution， while the simulations examined the effects of heat-source temperature and initial solution mass fraction. A mass-transfer Péclet number was introduced to quantify the competition between the interfacial evaporation and internal diffusion. The crystallization process comprised three stages， i.e.， solution concentration， crystal–liquid coexistence， and crystal dehydration. Increasing the heat-source temperature from 120 ℃ to 140 ℃ raised the peak heat flux from 2.465×10

W/m

to 3.512×10

W/m

and the peak mass-transfer flux from 1.680 mol/（m

·s） to 2.572 mol/（m

·s）. Increasing the initial solution mass fraction from 53% to 57% enhanced the mass-transfer flux but reduced the mass-transfer coefficient because higher viscosity limited the liquid-phase diffusion. When the mass-transfer Péclet number exceeded 1， the interfacial evaporation dominated the internal diffusion compensation， promoting LiBr enrichment near the gas–liquid interface and preferential crystallization. These results provide a basis for optimizing the heat and mass transfer in the energy storage units of honeycomb solution crystallization.

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