Numerical Investigation of Effect of Fin Geometry on Melting Process of Phase Change Material in an Evacuated Tube Solar Collector | ||
| Renewable Energy Research and Applications | ||
| دوره 5، شماره 1، فروردین 2024، صفحه 93-106 اصل مقاله (1.3 M) | ||
| نوع مقاله: Original Article | ||
| شناسه دیجیتال (DOI): 10.22044/rera.2023.12861.1207 | ||
| نویسندگان | ||
| Seyed Younes Afshoon؛ Rouzbeh Shafaghat* ؛ Mofid Gorji Bandpy | ||
| Sea-Based Energy Research Group, Babol Noshirvani University of Technology, Babol, Iran. | ||
| چکیده | ||
| This paper investigates the melting behavior of phase-change material (PCM) in an evacuated tube solar collector. The outer tube was made of borosilicate glass with a diameter of 60 mm, and the inner tube was made of copper with a diameter of 10 mm and length of 1500 mm. The heat transfer problem in heat pipe was investigated in four cases: finless, full fin, half fin, and third fin. The fins were cut from a 35 mm diameter copper tube and installed concentrically with the outer tube. The inner space between the absorber tube and the heat pipe was filled with stearic acid as the PCM. The numerical simulation was conducted using the Ansys Fluent 2022 for the laminar incompressible Newtonian fluid flow in the transient state via the enthalpy-porosity model. The initial temperature of PCM was 27°C, and liquid fraction was zero at the beginning of the simulation. After validating the numerical results with experimental ones, the collector performance was evaluated by considering the four temperatures of 68, 72, 76, and 80°C for the fin and heat pipe at three different times t = 22, 55, and 110 s. The results showed that by increasing the fin area in three cases of third fin, half fin, and full fin, the melting and storage time of PCM were reduced by 6%, 44%, and 87%, respectively. Also, as the Estefan number increased from 0.007 to 0.05, 0.09, and 0.13, the process of PCM melting decreased by 75%, 85%, and 92%, respectively. | ||
| کلیدواژهها | ||
| PCM؛ Fin؛ Thermal Conduction؛ Natural Convection؛ Enthalpy-Porosity | ||
| مراجع | ||
|
[1] Golshanan, A.A.a.M.H.D., An investigation of the effect of finned inner tube eccentricity in a double-pipe heat exchanger on PCM melting time, in 29th international association of mechanical engineers in Iran, and 8th conference on the thermal power plant industry. 2021: Tehran, Iran. p. IC1128.
[2] Fuentes, E., L. Arce and J. Salom, A review of domestic hot water consumption profiles for application in systems and buildings energy performance analysis. Renewable and Sustainable Energy Reviews, 2018. 81: p. 1530-1547.
[3] Medrano, M., et al., Experimental evaluation of commercial heat exchangers for use as PCM thermal storage systems. Applied energy, 2009. 86(10): pp. 2047-2055.
[4] Huang, X., et al., Theoretical and experimental studies of impacts of heat shields on heat pipe evacuated tube solar collector. Renewable Energy, 2019. 138: pp. 999-1009.
[5] Feliński, P. and R. Sekret, Effect of PCM application inside an evacuated tube collector on the thermal performance of a domestic hot water system. Energy and Buildings, 2017. 152: p. 558-567.
[6] Abokersh, M.H. et al., On-demand operation of a compact solar water heater based on U-pipe evacuated tube solar collector combined with phase change material. Solar Energy, 2017. 155: pp. 1130-1147.
[7] Xue, H.S., Experimental investigation of a domestic solar water heater with solar collector coupled phase-change energy storage. Renewable Energy, 2016. 86: p. 257-261.
[8] Naghavi, M. et al., Theoretical model of an evacuated tube heat pipe solar collector integrated with phase change material. Energy, 2015. 91: pp. 911-924.
[9] Papadimitratos, A. et al., Evacuated tube solar collectors integrated with phase change materials. Solar Energy, 2016. 129: pp. 10-19.
[10] Feliński, P. and R. Sekret, Effect of a low cost parabolic reflector on the charging efficiency of an evacuated tube collector/storage system with a PCM. Solar Energy, 2017. 144: pp. 758-766.
[11] Li, B. and X. Zhai, Experimental investigation and theoretical analysis on a mid-temperature solar collector/storage system with composite PCM. Applied Thermal Engineering, 2017. 124: p. 34-43.
[12] Naghavi, M, et al., Thermal performance of a compact design heat pipe solar collector with latent heat storage in charging/discharging modes. Energy, 2017. 127: pp. 101-115.
[13] Essa, M.A., N.H. Mostafa, and M.M. Ibrahim, An experimental investigation of the phase change process effects on the system performance for the evacuated tube solar collectors integrated with PCMs. Energy Conversion and Management, 2018. 177: pp. 1-10.
[14] Bazri, S. et al., An analytical and comparative study of the charging and discharging processes in a latent heat thermal storage tank for solar water heater system. Solar Energy, 2019. 185: pp. 424-438.
[15] Rahimi, M. et al., Analysis of geometrical and operational parameters of PCM in a fin and tube heat exchanger. International Communications in Heat and Mass Transfer, 2014. 53: pp. 109-115.
[16] Brent, A., V.R. Voller, and K. Reid, Enthalpy-porosity technique for modeling convection-diffusion phase change: application to the melting of a pure metal. Numerical Heat Transfer, Part A Applications, 1988. 13(3): pp. 297-318.
[17] Seddegh, S., X. Wang, and A.D. Henderson, A comparative study of thermal behaviour of a horizontal and vertical shell-and-tube energy storage using phase change materials. Applied Thermal Engineering, 2016. 93: pp. 348-358.
[18] Lacroix, M., Numerical simulation of a shell-and-tube latent heat thermal energy storage unit. Solar energy, 1993. 50(4): pp. 357-367.
[19] Aghaei.A., e.a., Numerical Investigation of the Effect of Internal Tube Eccentricity on the Melting and Solidification Process of Phase Change Materials in a Double -Pipe Heat Exchanger, in third Iranian Heat and Mass Transfer Conference. Noshirvani University of Technology. 2016: Babol , Mazandaran. pp. 93: 348-358.
[20] Seeniraj, R., R. Velraj, and N. Lakshmi Narasimhan, Thermal analysis of a finned-tube LHTS module for a solar dynamic power system. Heat and mass transfer, 2002. 38(4): pp. 409-417.
[21] Dhaidan, N.S. et al., Experimental and numerical investigation of melting of NePCM inside an annular container under a constant heat flux including the effect of eccentricity. International Journal of Heat and Mass Transfer, 2013. 67: pp. 455-468.
[22] Arshad, A. et al., An experimental study of enhanced heat sinks for thermal management using n-eicosane as phase change material. Applied Thermal Engineering, 2018. 132: pp. 52-66.
[23] Rostamian, F., N. Etesami, and M. Haghgoo, Management of electronic board temperature using heat sink containing pure and microencapsulated phase change materials. International Communications in Heat and Mass Transfer, 2021. 126: p. 105407.
[24] Rahimi, M. et al., Studying the effect of radial fins on melting process of a phase change material in shell and tube heat exchanger, in 3rd National Conference on Computational and Experimental Mechanics. 2021: Tehran, Iran. pp. 635-646.
[25] Alshukri, M.J., A.A. Eidan, and S.I. Najim, Thermal performance of heat pipe evacuated tube solar collector integrated with different types of phase change materials at various location. Renewable Energy, 2021. 171: pp. 635-646.
[26] Zhu, C. et al., Air-Type Vacuum-Tube Solar Collector Design and Heat Collection Performance Test. Energies, 2022. 15(15): p. 5679.
[27] Elbrashy, A. et al., Experimental study of solar air heater performance with evacuated tubes connected in series and involving nano-copper oxide/paraffin wax as thermal storage enhancer. Environmental Science and Pollution Research, 2023. 30(2): pp. 4603-4616.
[28] Kharkeshi, B.A. et al., Experimental study of an oscillating water column converter to optimize non-linear PTO using genetic algorithm. Energy, 2022: p. 124925.
[29] Bergman, T.L. et al., Introduction to heat transfer. 2011: John Wiley & Sons.
[30] Chopra, K. et al., Thermal performance of phase change material integrated heat pipe evacuated tube solar collector system: An experimental assessment. Energy Conversion and Management, 2020. 203: p. 112205.
[31] Nematpour Keshtali, A.a.M.S., Numerical investigation of nano PCM melting inside the triangular compartment, in Mechanical engineering journal of Amirkabir university. 2020: Tehran, Iran. pp. 52: 250-252.
[32] Hamit, A. and M.Ş. Adin, Numerical analysis of damaged helical gear wheel. Batman Üniversitesi Yaşam Bilimleri Dergisi, 2021. 11(1): p. 43-56.
[33] Hamit, A., R.K. Ergün, and M.Ş. Adin, Computer aided numerical damage analysis of the axle shaft. European Mechanical Science, 2022. 6(3): pp. 201-206.
[34] Tan, F. et al., Experimental and computational study of constrained melting of phase change materials (PCM) inside a spherical capsule. International Journal of Heat and Mass Transfer, 2009. 52(15-16): pp. 3464-3472.
| ||
|
آمار تعداد مشاهده مقاله: 498 تعداد دریافت فایل اصل مقاله: 570 |
||