发电技术2024，Vol.45Issue(3)：508-516,9.DOI:10.12096/j.2096-4528.pgt.23072
管壳式相变蓄热器的蓄释热过程性能分析
Performance Analysis of Heat Storage and Release Process for a Shell-and-Tube Phase Change Heat Exchanger
摘要
Abstract
[Objectives]The influence of different placements of phase change heat exchangers on the phase change process was investigated,and the simplified mode of multi-tube heat exchangers was further analyzed.[Methods]Based on the enthalpy-porosity method,a calculation model for the melting and solidification process of the shell-and-tube paraffin heat exchanger was established,and the phase change process of paraffin outside the single-tube was investigated under horizontal and vertical placements.The effects of single-tube heat exchanger and multi-tube heat exchanger with straight and staggered rows on the melting and solidification process were compared,respectively.[Results]Full melting time of horizontal single-tube heat exchanger is 18%shorter than that of vertical,but the difference of full solidification time between the two is not significant.Unlike the melting process,the solidification process uses heat conduction as the main mode of heat transfer,so it is relatively slow,and the full solidification time is increased by more than 20%compared to the same period of full melting time.The time required for the melting and solidification process of multi-tube heat exchanger is slightly longer than that of the single-tube heat exchanger,but its increase in time is not more than 10%,and its melting and solidification rate curve is basically consistent with that of single-tube.Through further study,it is found that when the volume of paraffin wraps around each tube in the multi-tube heat exchanger and the wrapping method is the same,different arrangement methods of the multi-tube heat exchanger would not affect the melting and solidification process.[Conclusions]Compared with the vertical placement,the horizontal placement can effectively enhance the melting rate of paraffin outside the single-tube,and the enhancement effect of the melting process is more obvious than that of the solidification process.In addition,when analyzing the performance of the melting and solidification process of the multi-tube heat exchanger,the single-tube or part of the periodic tube can be used for simplification.关键词
太阳能/相变蓄热器/释热/传热/数值模拟Key words
solar energy/phase change heat exchanger/heat release/heat transfer/numerical simulation分类
能源科技引用本文复制引用
屠楠,刘家琛,徐静,方嘉宾,马彦花..管壳式相变蓄热器的蓄释热过程性能分析[J].发电技术,2024,45(3):508-516,9.基金项目
陕西省重点研究计划项目(2022GXLH-01-08) （2022GXLH-01-08）
陕西省秦创原"科学家+工程师"队伍建设项目(2022KXJ-179) （2022KXJ-179）
中国电力建设股份有限公司研究中心定向资助计划(DJ-PTZX-2021-03).Project Supported by Key Research Project of Shaanxi Province(2022GXLH-01-08) （DJ-PTZX-2021-03）
Shaanxi Province Qin Chuang Yuan"Scientist&Engineer"Team Construction Project(2022KXJ-179) （2022KXJ-179）
Directed Funding Program of Research Center of China Power Construction Company Limited(DJ-PTZX-2021-03). （DJ-PTZX-2021-03）
