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CFD and experimental insights into natural convection in symmetrically heated vertical cylinders for renewable energy accumulation

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  • Gasiunas, Stasys
  • Seporaitis, Marijus

Abstract

This study investigates natural convection in a vertically oriented cylinder with a steam-heated pillow-plate jacket, relevant to renewable energy applications such as solar thermal energy storage. The heated region covers 70 % of the cylinder height, with adiabatic zones occupying 4 % at the bottom and 26 % at the top. An experimental tank (0.319 m³) filled with water, initially at 19 °C, was heated to 101 °C using a steam jacket. Temperature measurements were taken using an infrared camera for the non-insulated vessel, followed by internal sensors for the insulated vessel.

Suggested Citation

  • Gasiunas, Stasys & Seporaitis, Marijus, 2025. "CFD and experimental insights into natural convection in symmetrically heated vertical cylinders for renewable energy accumulation," Renewable Energy, Elsevier, vol. 241(C).
    • Handle: RePEc:eee:renene:v:241:y:2025:i:c:s0960148124023814
    DOI: 10.1016/j.renene.2024.122313
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