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Experimental study of natural convection heat transfer in a microencapsulated phase change material slurry

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  • Diaconu, Bogdan M.
  • Varga, Szabolcs
  • Oliveira, Armando C.

Abstract

A new microencapsulated PCM (Phase Change Material) slurry (MEPCS) at high concentration (45% w/w) was developed based on microencapsulated Rubitherm RT6. Its heat storage and heat transfer characteristics have been experimentally investigated in order to assess its suitability for integration into a low temperature heat storage system for solar air conditioning applications. Differential scanning calorimetry tests have been conducted to evaluate the cold storage capacity and phase change temperature range. An experimental setup was built in order to quantify the natural convection heat transfer occurring from a vertical helically coiled tube immersed in the MEPCS. First, tests were carried out using water in order to obtain natural convection heat transfer correlations and then a comparison was made with the results obtained for the MEPCS. It was found that inside the phase change interval the values of the heat transfer coefficient for the MEPCS were significantly higher than for water, under identical temperature conditions.

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  • Diaconu, Bogdan M. & Varga, Szabolcs & Oliveira, Armando C., 2010. "Experimental study of natural convection heat transfer in a microencapsulated phase change material slurry," Energy, Elsevier, vol. 35(6), pages 2688-2693.
    • Handle: RePEc:eee:energy:v:35:y:2010:i:6:p:2688-2693
    DOI: 10.1016/j.energy.2009.06.028
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    1. Naphon, Paisarn & Wongwises, Somchai, 2006. "A review of flow and heat transfer characteristics in curved tubes," Renewable and Sustainable Energy Reviews, Elsevier, vol. 10(5), pages 463-490, October.
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    Cited by:

    1. Zhang, G.H. & Zhao, C.Y., 2011. "Thermal and rheological properties of microencapsulated phase change materials," Renewable Energy, Elsevier, vol. 36(11), pages 2959-2966.
    2. Ran, Fengming & Chen, Yunkang & Cong, Rongshuai & Fang, Guiyin, 2020. "Flow and heat transfer characteristics of microencapsulated phase change slurry in thermal energy systems: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 134(C).
    3. Qiu, Zhongzhu & Ma, Xiaoli & Zhao, Xudong & Li, Peng & Ali, Samira, 2016. "Experimental investigation of the energy performance of a novel Micro-encapsulated Phase Change Material (MPCM) slurry based PV/T system," Applied Energy, Elsevier, vol. 165(C), pages 260-271.
    4. Li, Wei & Zhang, Xing-xiang & Wang, Xue-chen & Tang, Guo-yi & Shi, Hai-feng, 2012. "Fabrication and morphological characterization of microencapsulated phase change materials (MicroPCMs) and macrocapsules containing MicroPCMs for thermal energy storage," Energy, Elsevier, vol. 38(1), pages 249-254.
    5. Ma, F. & Chen, J. & Zhang, P., 2018. "Experimental study of the hydraulic and thermal performances of nano-sized phase change emulsion in horizontal mini-tubes," Energy, Elsevier, vol. 149(C), pages 944-953.
    6. Yin, Dezhong & Ma, Li & Liu, Jinjie & Zhang, Qiuyu, 2014. "Pickering emulsion: A novel template for microencapsulated phase change materials with polymer–silica hybrid shell," Energy, Elsevier, vol. 64(C), pages 575-581.
    7. Basak, Tanmay & Anandalakshmi, R. & Kumar, Pushpendra & Roy, S., 2012. "Entropy generation vs energy flow due to natural convection in a trapezoidal cavity with isothermal and non-isothermal hot bottom wall," Energy, Elsevier, vol. 37(1), pages 514-532.
    8. Bianco, Nicola & Caliano, Martina & Fragnito, Andrea & Iasiello, Marcello & Mauro, Gerardo Maria & Mongibello, Luigi, 2023. "Thermal analysis of micro-encapsulated phase change material (MEPCM)-based units integrated into a commercial water tank for cold thermal energy storage," Energy, Elsevier, vol. 266(C).
    9. Giro-Paloma, Jessica & Barreneche, Camila & Martínez, Mònica & Šumiga, Boštjan & Cabeza, Luisa F. & Fernández, A. Inés, 2015. "Comparison of phase change slurries: Physicochemical and thermal properties," Energy, Elsevier, vol. 87(C), pages 223-227.
    10. Li, Wei & Song, Guolin & Tang, Guoyi & Chu, Xiaodong & Ma, Sude & Liu, Caifeng, 2011. "Morphology, structure and thermal stability of microencapsulated phase change material with copolymer shell," Energy, Elsevier, vol. 36(2), pages 785-791.
    11. Zhao, C.Y. & Zhang, G.H., 2011. "Review on microencapsulated phase change materials (MEPCMs): Fabrication, characterization and applications," Renewable and Sustainable Energy Reviews, Elsevier, vol. 15(8), pages 3813-3832.
    12. Qiu, Zhongzhu & Zhao, Xudong & Li, Peng & Zhang, Xingxing & Ali, Samira & Tan, Junyi, 2015. "Theoretical investigation of the energy performance of a novel MPCM (Microencapsulated Phase Change Material) slurry based PV/T module," Energy, Elsevier, vol. 87(C), pages 686-698.
    13. Salunkhe, Pramod B. & Shembekar, Prashant S., 2012. "A review on effect of phase change material encapsulation on the thermal performance of a system," Renewable and Sustainable Energy Reviews, Elsevier, vol. 16(8), pages 5603-5616.
    14. Qiu, Zhongzhu & Ma, Xiaoli & Li, Peng & Zhao, Xudong & Wright, Andrew, 2017. "Micro-encapsulated phase change material (MPCM) slurries: Characterization and building applications," Renewable and Sustainable Energy Reviews, Elsevier, vol. 77(C), pages 246-262.
    15. Li, Zhouhang & Zhai, Yuling & Li, Kongzhai & Wang, Hua & Lu, Junfu, 2016. "A quantitative study on the interaction between curvature and buoyancy effects in helically coiled heat exchangers of supercritical CO2 Rankine cycles," Energy, Elsevier, vol. 116(P1), pages 661-676.
    16. Delgado, M. & Lázaro, A. & Mazo, J. & Peñalosa, C. & Marín, J.M. & Zalba, B., 2017. "Experimental analysis of a coiled stirred tank containing a low cost PCM emulsion as a thermal energy storage system," Energy, Elsevier, vol. 138(C), pages 590-601.
    17. Liu, Lingkun & Alva, Guruprasad & Huang, Xiang & Fang, Guiyin, 2016. "Preparation, heat transfer and flow properties of microencapsulated phase change materials for thermal energy storage," Renewable and Sustainable Energy Reviews, Elsevier, vol. 66(C), pages 399-414.
    18. Zhang, P. & Ma, Z.W., 2012. "An overview of fundamental studies and applications of phase change material slurries to secondary loop refrigeration and air conditioning systems," Renewable and Sustainable Energy Reviews, Elsevier, vol. 16(7), pages 5021-5058.
    19. Kaluri, Ram Satish & Basak, Tanmay, 2010. "Analysis of distributed thermal management policy for energy-efficient processing of materials by natural convection," Energy, Elsevier, vol. 35(12), pages 5093-5107.
    20. Zhang, P. & Ma, Z.W. & Bai, Z.Y. & Ye, J., 2016. "Rheological and energy transport characteristics of a phase change material slurry," Energy, Elsevier, vol. 106(C), pages 63-72.
    21. Fang, Guiyin & Tang, Fang & Cao, Lei, 2014. "Preparation, thermal properties and applications of shape-stabilized thermal energy storage materials," Renewable and Sustainable Energy Reviews, Elsevier, vol. 40(C), pages 237-259.

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