基于有机朗肯循环系统的多管式相变蓄热器的设计
Design of Multi-Tube Phase Change Heat Accumulators Based on Organic Rankine Cycle Systems
摘要: 为保证有机朗肯循环系统的稳定供电，对有机朗肯循环系统设计相变蓄热器，采用数值模拟的方法，选择外径dout，外径与内径的比值dout/din，管距与内径的比值d/din作为相变蓄热器的结构参数，研究不同的结构参数对相变蓄热器性能的影响。结果表明：随蓄热器外径与内径比值的增大，蓄热速率在不断减小，又因为重力作用产生的浮升力引起自然对流，在液相率达到0.95以后蓄热速率随比值增大而减小，外径与内径比值为10时完全融化所需的总蓄热时间最短；随着蓄热器管距与内径比值的减少，蓄热效果也越来越好，但当比值减小到一定范围后，其蓄热速率增大的有效性会随着比值的减小逐渐降低，模拟得出管距与内径比值为2时总融化时间最短；随着外径的增大，相变蓄热器的蓄热速率及蓄热时间都有所增加，外径dout每增大0.2 m，蓄热时间增加36.5%。
Abstract: In order to ensure the stable power supply of the organic Rankine cycle system, a phase change accumulator was designed for the organic Rankine cycle system, and numerical simulation was used to select the outer diameter dout, the ratio of outer diameter to inner diameter dout/din, and the ratio of tube distance to inner diameter d/din as the structural parameters of the phase change accumulator, and to study the influence of different structural parameters on the performance of the phase change accumulator. The results show that: With the increase of the ratio of the outer diameter to the inner diameter of the regenerator, the heat storage rate decreases continuously. Due to the natural convection caused by the buoyancy force generated by gravity, the heat storage rate decreases with the increase of the ratio after the liquid phase ratio reaches 0.95. When the ratio of the outer diameter to the inner diameter is 10, the total heat storage time required for complete melting is the shortest; as the ratio of the distance between the tube and the inner diameter of the accumulator decreases, the heat storage effect is also getting better, but when as the ratio decreases to a certain range, the effectiveness of the heat storage rate decreases as the ratio decreases, and the simulation shows that the total melting time is shortest for a ratio of 2; as the outer diameter increases, the heat storage rate and time of the phase change accumulator increases, and the heat storage time increases by 36.5% for each 0.2 m increase in outer diameter dout.
文章引用：惠梦阁, 赵军. 基于有机朗肯循环系统的多管式相变蓄热器的设计[J]. 建模与仿真, 2022, 11(3): 562-571. https://doi.org/10.12677/MOS.2022.113053

参考文献

[1] Lecompte, S., Oyewunmi, O.A., Markides, C.N., et al. (2017) Case Study of an Organic Rankine Cycle (ORC) for Waste Heat Recovery from an Electric Arc Furnace (EAF). Energies, 10, Article No. 649. [Google Scholar] [CrossRef] 
[2] Pantaleo, A.M., Fordham, J., Oyewunmi, O.A., et al. (2018) Integrating Cogeneration and Intermittent Waste-Heat Recovery in Food Processing: Microturbines vs. ORC Systems in the Coffee Roasting Industry. Applied Energy, 225, 782-796. [Google Scholar] [CrossRef] 
[3] Markides, C.N. (2015) Low-Concentration Solar-Power Systems Based on Organic Rankine Cycles for Distributed-Scale Applications: Overview and Further Developments. Frontiers in Energy Research, 3, Article No. 47. [Google Scholar] [CrossRef] 
[4] Freeman, J., Hellgardt, K. and Markides, C.N. (2015) An Assessment of Solar-Powered Organic Rankine Cycle Systems for Combined Heating and Power in UK Domestic Applications. Applied Energy, 138, 605-620. [Google Scholar] [CrossRef] 
[5] Zhang, Y.W. and Faghri, A. (1996) Heat Transfer Enhancement in Latent Heat Thermal Energy Storage System by Using an External Radial Finned Tube. Journal of Enhanced Heat Transfer, 3, 119-127. [Google Scholar] [CrossRef] 
[6] Agyenim, F., Hewitt, N., Eames, P. and Smyth, M. (2010) A Review of Materials, Heat Transfer and Phase Change Problem Formulation for Latent Heat Thermal Energy Storage Systems (LHTESS). Renewable and Sustainable Energy Reviews, 14, 615-628. [Google Scholar] [CrossRef] 
[7] Kousha, N., Rahimi, M., Pakrouh, R. and Bahrampoury, R. (2019) Experimental Investigation of Phase Change in a Multitube Heat Exchanger. Journal of Energy Storage, 23, 292-304. [Google Scholar] [CrossRef] 
[8] Esapour, M., Hosseini, M.J., Ranjbar, A.A., et al. Phase Change in Multi-Tube Heat Exchangers. Renewable Energy, 85, 1017-1025.[CrossRef] 
[9] Akgün, M., Aydın, O. and Kaygusuz, K. (2008) Thermal Energy Storage Performance of Paraffin in a Novel Tube-in-Shell System. Applied Thermal Engineering, 28, 405-413. [Google Scholar] [CrossRef] 
[10] 胡凌霄. 太阳能热水系统中相变蓄热模拟与设计[D]: [硕士学位论文]. 上海: 东华大学, 2010.
[11] 仝仓, 李祥立, 端木琳. 多管式相变蓄热器换热影响因素研究[J]. 太阳能学报, 2019, 40(8): 2299-2305.
[12] 郭梦雪. 套管式相变蓄热器内管排列方式和壁温的影响[J]. 煤气与热力, 2019, 39(5): 1-7+41.
[13] Agyenim, F., Eames, P. and Smyth, M. (2009) A Comparison of Heat Transfer Enhancement in a Medium Temperature Thermal Energy Storage Heat Exchanger Using Fins. Solar Energy, 83, 1509-1520. [Google Scholar] [CrossRef] 
[14] Voller, V.R. and Prakash, C. (1987) A Fixed Grid Numerical Modelling Methodology for Convection-Diffusion Mushy Region Phase-Change Problems. International Journal of Heat and Mass Transfer, 30, 1709-1719. [Google Scholar] [CrossRef] 
[15] Seddegh, S., Wang, X.L. and Henderson, A.D. (2015) Numerical Investigation of Heat Transfer Mechanism in a Vertical Shell and Tube Latent Heat Energy Storage System. Applied Thermal Engineering, 87, 698-706. [Google Scholar] [CrossRef] 
[16] 郭少朋. 移动式余热利用系统蓄热器实验和模拟研究及经济性分析[D]: [博士学位论文]. 天津: 天津大学, 2013.

为你推荐