Natural convection heat transfer of molten salt in a single energy storage tank
Source abstract
Abstract
Heat transfer in molten salt in a cylinder tank is studied via simulation and experiment to obtain its natural convection heat transfer in a single energy storage tank. Simulation and experimental results show that the natural convection heat transfer of water in a cylinder tank fits well with Garon’s correlation. However, significant deviations occur when Garon’s correlation is used to predict the natural convection heat transfer of molten salt because of its high viscosity and low thermal conductivity. However, the simulated data of the natural convection heat transfer of molten salt fit well with those of the experimental results. Thus, a correlation that considers the effect of variable physical properties is proposed in this study to predict the natural convection heat transfer of molten salt. The deviation of the present data from the proposed correlation is less than ±20%. The results of this study can serve as a basis for the design of single energy storage tanks.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Phase Change Materials Research · Adsorption and Cooling Systems · Solar Thermal and Photovoltaic Systems
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (20)
Show source-provided references
1. Rebecca D. A global review of concentrated solar power storage. In: Solar2010, the 48 th AuSES Annual Conference, Canberra, ACT, Australia, 2010
2. James E P, Steven K S, William J K. Development of a molten-salt thermocline thermal storage system for parabolic trough plants. J Sol Energ, 2002, 124: 153–15910.1115/1.1464123 ↗
3. Kopp J E. Two-Tank indirect thermal storage designs for solar parabolic trough power plants. Las Vegas: University of Nevada, 2009
4. Lu Y W, Du W B, Wu Y T, et al. Sensible heat storage in a single tank using molten salt and associated natural convection heat transfer (in Chinese). Energ Stor Sci Tech, 2015, 4: 189–193
5. Lu Y W, Li X L, Li Q, et al. Numerical simulation and experimental investigation of natural convection heat transfer of molten salt around fine wire. Sci China Tech Sci, 2013, 56: 1651–165610.1007/s11431-013-5253-y ↗
6. Lu Y W, Li X L, Du W B, et al. Natural convection heat transfer of molten nitrate around horizontal cylinder (in Chinese). J Chem Indust Eng, 2015, 66: 949–954
7. Garon A M, Goldstein R J. Velocity and heat transfer measurements in thermal convection. Phys Fluids, 1973, 16: 1818–182510.1063/1.1694219 ↗
8. Kathare V, Davidson J H, Kulacki F A. Natural convection in water-saturated metal foam. Int J Heat Mass Transfer, 2008, 51: 3794–380210.1016/j.ijheatmasstransfer.2007.11.051 ↗
9. Schulte-Fischedick J, Tamme R, Herrmann U. CFD analysis of the cool down behaviour of molten salt thermal storage systems. In: Proceedings of ES2008 Energy Sustainability, 2008 Jacksonville, Florida, USA
10. Ren N, Wu Y T, Ma C F, et al. Preparation and thermal properties of quaternary mixed nitrate with low melting point. Sol Energ Mat Sol C, 2014, 127: 6–1310.1016/j.solmat.2014.03.056 ↗
11. Wu Y T, Liu S W, Xiong Y X, et al. Experimental study on the heat transfer characteristics of a low melting point salt in a parabolic trough solar collector system. Appl Therm Eng, 2015, 89: 748–75410.1016/j.applthermaleng.2015.06.054 ↗
12. Zhao C Y, Wu Z G. Thermal property characterization of a low melting-temperature ternary nitrate salt mixture for thermal energy storage systems. Sol Energ Mat Sol C, 2011, 95: 3341–334610.1016/j.solmat.2011.07.029 ↗
13. George J J, Gial N T. Melting and premelting properties of the KNO3-NaNO2-NaNO3 eutectic system. J Chem Eng Data, 1983, 28: 201–20210.1021/je00032a022 ↗
14. Tufeu R, Petitet J P, Denielou L, et al. Experimental determination of the thermal conductivity of molten pure salts and salt mixtures. Int J Thermophys, 1985, 6: 315–33010.1007/BF00500266 ↗
15. Hoffman H W, Cohen S I. Fused salt heat transfer-part. Part III: Forced-convection heat transfer in circular tubes containing the salt mixture NaNO2-NaNO3-KNO3. Report No. ORNL-2433, 1960
16. Fand R M. A correlation for heat transfer by natural convection from horizontal cylinders that accounts for viscous dissipation. Heat Mass Transfer, 1983, 26: 709–72610.1016/0017-9310(83)90021-2 ↗
17. Morgan V T. The overall convective heat transfer from smooth circular cylinders. Adv Heat Transfer, 1975, 11: 199–26410.1016/S0065-2717(08)70075-3 ↗
18. Churchill S W, Humbert H S C. Correlating equations for laminar and turbulent free convection from a horizontal cylinder. Int J Heat Mass Transfer, 1975, 18: 1049–105310.1016/0017-9310(75)90222-7 ↗
19. Tsubouchi T, Masuda H. Heat transfer by natural convection from horizontal cylinders at low Rayleigh numbers. Rep Inst High Speed Mech, 1967, 19: 205–219
20. Benjamin G, Yogesh J, Roop L M, et al. Buoyancy-induced flows and transport. J Electr Pack, 1987, 111: 321