Experimental study on solar heat battery using phase change materials for parabolic dish collectors

Ramalingam Senthil, Inbaraj Infanta Mary Priya, Mukund Gupta, Chinmaya Rath, Nilanshu Ghosh

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Abstract

Energy consumption has increased with the population increase, and fossil fuel dependency has risen and causing pollutions. Solar energy is suitable to provide society's thermo-electric needs. Thermal energy storage-based concentrated solar receivers are aimed at store heat energy and transportable to the applications. A cavity receiver with two-phase change materials (PCM) is experimentally investigated using a parabolic dish collector to act as the solar heat battery. The selected PCMs are MgCl2.6H2O and KNO3-NaNO3. PCMs are chosen and placed as per the temperature zones of the receiver. The outdoor test was conducted to determine the conical receiver's storage performance using cascaded PCMs. The complete melting of PCM attains at an average receiver surface temperature of 230°C. The complete melting of the PCM in the receiver took around 30 minutes at average radiation around 700 W/m2, and heat stored is approximately 5000 kJ. The estimated number of cavity receivers to be charged on a sunny day is about 10-15 according to the present design and selected PCMs, for later use.

Original languageEnglish
Pages (from-to)819-825
Number of pages7
JournalInternational Journal of Renewable Energy Development
Volume10
Issue number4
DOIs
Publication statusPublished - 2021

Keywords

  • Cascaded PCM
  • Heat battery
  • Parabolic dish
  • Phase change material
  • Solar energy
  • Thermal energy storage

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