电力科技与环保2024，Vol.40Issue(5)：533-543,11.DOI:10.19944/j.eptep.1674-8069.2024.05.010
基于翅片管的固-液相变储热型换热器的模拟研究
Simulation study of solid-liquid phase change in regenerative heat exchanger with finned tubes
摘要
Abstract
Existing waste heat recovery technology is relatively backward in low-temperature waste heat recovery,so a low-temperature heat-storage heat exchanger was designed with the input heat fluid of 90℃water and phase change material of 60#paraffin wax.Fluent was used to simulate the heat storage and release with different sizes and numbers.The results showed that after 500 s of heat storage,average liquid fraction of integrate finned heat exchanger was 45.5%and 81.3%more than small finned heat exchanger and no finned heat exchanger;after 500 s of heat release,outlet water temperature of integrate finned,small finned and no finned heat exchanger were 0.5℃,0.4℃,0.2℃higher than initial value,respectively.Integrate fins showed the most stable and best heat exchange ability,based on which a study on the number of tubes carried out.It was found that with 1,2,3 fin layers,after 1 000 s of heat storage,average liquid fraction were 0.36,0.47,0.58;after 500 s of heat release,outlet water temperature were 0.21℃,0.26℃,0.36℃higher than initial value.Obviously,heat exchange efficiency,average melting and condensation rate of phase change material and stability were enhanced as number fin size and layer increased,can provide technical guidance for waste heat recovery in the low-temperature waste heat recovery.关键词
蓄热式换热器/石蜡/固液相变/翅片管Key words
regenerative heat exchanger/parafin/solid-liquid phase change/finned tubes分类
能源科技引用本文复制引用
满雅萌,魏天洋,钱潇然,王维..基于翅片管的固-液相变储热型换热器的模拟研究[J].电力科技与环保,2024,40(5):533-543,11.基金项目
国家自然科学基金项目(52106082) （52106082）
中国广核集团-哈尔滨工业大学先进核能与新能源研究院项目(CGN-HIT202308) （CGN-HIT202308）
黑龙江省自然科学基金项目(LH2022E064) （LH2022E064）
