基于内管移动的卧式管壳式相变储热器储热性能优化研究
Optimization study on thermal storage performance of horizontal shell and tube latent heat thermal energy storage exchangers based on inner tube movement
周少斌 1曹红梅 2付宁 2张民 3郭丰瑞 3王晓龙 3高明1
作者信息
- 1. 山东大学能源与动力工程学院高效储能及氢能利用山东省工程研究中心,山东 济南 250061
- 2. 华能山东发电有限公司,山东 济南 250014
- 3. 华能国际发电有限公司日照电厂,山东 日照 276800
- 折叠
摘要
相变储热技术能够实现对固态储放氢过程热量的回收和供给,实现固态储氢罐内的自热平衡,提高储放氢性能.研究针对卧式管壳式相变储热器,提出了一种新型的内管偏心放置绕中心轴线旋转的运动方式,采用Fluent数值模拟软件,基于动网格技术编写了用户自定义函数UDF,重点研究了内管偏心距离与旋转速度对储热性能的影响.结果表明:与传统中心内管静止布置相比,偏心内管的旋转运动能够显著提高储热性能,当偏心距离为9 mm,旋转速度为0.10 r/min时,储热时间达到最小值,储热时间减少了 92.16%,时间平均储热速率是内管静止布置的 11.51倍;当偏心距离为9 mm,旋转速度由0.30 r/min减少至0.10 r/min时,储热时间减少了 13.57%;当旋转速度为 0.10 r/min,偏心距离由 3 mm增至9 mm时,储热时间减少了70.48%.该研究结果可为卧式管壳式相变储热器在储氢领域的性能优化研究提供新思路.
Abstract
Latent heat thermal energy storage technology can realize recovery and supply of heat during solid-state hydrogen storage and release process,achieving self-thermal balance inside the solid-state hydrogen storage tank,and improve the hydrogen storage and release performance.For horizontal tube and shell latent heat thermal energy storage exchanger,a new movement method where the inner tube is placed eccentrically to rotate around the central axis is proposed.By the Fluent software,the user-defined function UDF is written using the dynamic mesh technique,and the influence of eccentric distance and rotation velocity of the inner tube on heat storage performance is focused.The results show that,compared with the conventional static arrangement of the central inner tube,the rotation movement of the eccentric inner tube can improve the heat storage performance significantly.The heat storage time reaches the shortest when the eccentric distance is 9 mm and the rotation velocity is 0.10 r/min,namely decreases by 92.16%,and the time average heat storage rate increases by 11.51 times.The heat storage time reduces by 13.57%when the eccentric distance is 9 mm and the rotation velocity is decreased from 0.30 r/min to 0.1 r/min,it decreases by 70.48%when the rotation velocity is 0.10 r/min and the eccentric distance is increased from 3 mm to 9 mm.The study results can provide a new idea for performance optimization of horizontal shell and tube latent heat thermal energy storage exchangers in hydrogen storage field.
关键词
卧式管壳式相变储热器/固态储氢/内管移动/储热性能/数值模拟Key words
horizontal shell and tube latent heat thermal energy storage exchanger/solid-state hydrogen storage/inner tube movement/heat storage performance/numerical simulation引用本文复制引用
基金项目
中国华能集团有限公司总部科技项目(HNKJ24-HF36)
山东省自然科学基金项目(ZR2023ME025)
出版年
2024
国家科技期刊平台
NSTL
万方数据