| 摘要: |
| 在溴化锂吸收式蓄能系统中，允许溶液结晶会大大提高系统蓄能密度，但是溶液结晶后，放能速率大大降低。为了解决溴化锂溶液浓度差储能器中溶晶困难的问题，本文设计了可以实现快速溶晶的平膜构架蓄能器，搭建了测试膜储能器内部传热传质性能的实验台，并分析了水蒸气流通截面积对传热传质性能的影响。结果表明：所设计的平膜蓄能器可以在60 min内使初始质量分数为65%的溴化锂溶液实现溶晶，此实验方法证实了平膜构架蓄能器的可行性。 |
| 关键词: 溶晶 蓄能 平膜 蓄能器 溴化锂 |
| DOI： |
| 投稿时间：2017-01-10
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| 基金项目:山东省自然科学基金（ZR2014JL036）——不稳定热源条件下膜构架蓄能器内部传热传质机理研究。 |
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| Experimental Study on Dissolving Crystals within a Flat Membrane Accumulator |
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Qin Xiaodong, Wang Dechang, Liu Zhen, Tian Xiaoliang, Li Yanhui
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| (College of Mechanical and Electrical Engineering, Qingdao University) |
| Abstract: |
| In a lithium bromide absorption-type accumulator system, allowing the solution to crystallize greatly improves the system storage density. However, the crystals seriously affect the discharge process of the energy-storage system. To rapidly dissolve the crystals, a flat-membrane framed accumulator was designed to address this difficulty. The heat-transfer and mass-transfer performance in the accumulator will directly affect the energy-discharge rate of the accumulator. Therefore, a test rig was built to test the heat- and mass-transfer performance in the membrane accumulator. Using experimental data, the heat- and mass-transfer characteristics of the membrane accumulator under different working conditions were analyzed, as well as the influence of the water-vapor cross-sectional area on the heat-and mass-transfer performance. The experimental results show that the crystals in the lithium-bromide solution with an initial mass fraction of 65% can be completely dissolved in 60 min. The feasibility of the flat-membrane framed accumulator is confirmed by this experiment. |
| Key words: dissolving crystal energy storage flat membrane accumulator lithium bromide |
