Experimental investigation on inorganic salt solution’s undercooling degree under the action of porous media and different concentrations
- 37 Downloads
The undercooling degree of inorganic salt solution has great effect on the characteristic of phase change materials in cooling storage methods. Ammonium chloride solution was chosen as a kind of inorganic salt solution, and the experimental system was built to study the influence on supercooling degree of inorganic salt solution under the effection of concentration and porous media. The heat transfer enhancement method was studied by changing the concentration of inorganic salt solution and the diameter of pellets constituting the porous media. The experimental results show that with the increase in concentration, the value of inorganic salt solution’s supercooling degree and dispersion degree reduced, while the stability increased. The undercooling degree of the 15% ammonium chloride solution decreased by 17.5% compared to the 5% ammonium chloride solution. As the pellet diameter constituting the porous media decreased, the average value of the solution’s undercooling degree and dispersion degree also decreased, while the stability increased. The average value of the solution’s undercooling degree decreased by 21.7% when using 5-mm-diameter pellets compared to the ammonium chloride solution without porous media.
KeywordsUndercooling degree Porous media Concentration Inorganic salt solution Ammonium chloride solution
Funding was provided by Shanghai Municipal Science and technology project (Grant No. 16040501600), Doctoral innovation fund of Shanghai Maritime Univeristy (Grant No. 2017ycx081).
- 6.Chen K, Hong R, Wu J, et al. Experimental research on low undercooling of ice storage and analysis of its energy saving. Energy Eng. 2015;01(013):52–5.Google Scholar
- 7.Pan L, Huang L, Yue Q, et al. Influence of vibration on the undercooling relex of inorganic salt solution as a phase change materials. J Zhejiang Univ Technol. 2008;36(06):655–8.Google Scholar
- 9.Hong R, Sun ZH, Wu J, et al. An experimental study on reduce undercooling degree of ice storage solution using nucleation additive. J Zhejiang Univ (Eng Sci). 2005;39(11):1797–800.Google Scholar
- 12.He Y, Zhang N, Yuan Y, et al. Improvement of supercooling and thermal conductivity of the sodium acetate trihydrate for thermal energy storage with α-Fe2O3, as addictive. J Therm Anal Calorim. 2018;2:1–9.Google Scholar
- 14.Hu Y, Jing D. Study on heat and mass transfer of porous media. Guangdong Chem Ind. 2006;33(11):44–7.Google Scholar
- 16.Liu X, Jiang Y, Zhang S, et al. Melting process of porous- media-filled ice hold-over plate. Chem Ind Eng Prog. 2015;34(10):3636–43.Google Scholar
- 17.Siahpush A, O’brien J, C’repecu J. Phase change heat transfer enhancement using copper porous loam. J Heat Trasf. 2008;130:1–11.Google Scholar
- 18.Wu Z, Tao W. Analysis of heat transfer performance of metal matrix materials in the phase change thermal storage system. J Eng Thermophys. 2013;34(02):307–9.Google Scholar
- 19.Wang Z, Peng X, Wang B, et al. Experimental investigation of nucleate boiling phenomena in bead-packed structure. J Eng Thermophys. 2002;23(06):742–4.Google Scholar
- 20.Zhao Q, Zhang X, Liu T, et al. Undercooling of water and characteristics cold storage in bead-packed porous structure. CIESC J. 2015;66(01):426–32.Google Scholar
- 21.Zhang X, Liu T, Zhao Q, et al. Analysis of undercooling degree of water in ball-packed porous structure of different materials and diameters. CIESC J. 2015;66(06):2011–6.Google Scholar