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<p>Phase change materials (PCMs) have garnered significant attention in recent years for their potential to store thermal energy to reduce conventional energy consumption. A concentric cylinder model has been employed, with constant heating from the inner walls, while PCM and water occupy the middle and outer annulus, respectively. This setup is utilized to demonstrate experimental and numerical investigations into the simultaneous cooling and heating of paraffin wax PCM (RT50) under various thermal boundary conditions. The aim is to understand its behavior and explore potential applications in energy-efficient power cycles. The experiment and computational fluid dynamics (CFD) simulation results have been presented. Simulations facilitated the manipulation of variables, making it easier to analyze the system. The numerical is repeated with constant isothermal heating of PCM at 348&#xa0;K and its simultaneous cooling under different thermal boundary conditions (adiabatic and isothermal:273&#xa0;K and 300&#xa0;K) of outer walls of the cooling chamber (CCOW). Temperature control is pivotal for maintaining PCM in the transition phase. The effect of different source temperatures (348&#xa0;K and 358&#xa0;K) and sink temperatures on different coolants (ice, cold, and normal water and ambient air) was also studied experimentally. Through precise temperature control of the source and sink, it is possible to keep PCM in the transitional phase serving as an efficient heat exchanger in continuous operation. It is crucial to keep the cooling medium at a low isothermal temperature which extends the transition stage. This study facilitates the capturing and recycling of sensible heat, thereby improving the energy efficiency of continuous cooling systems.</p>

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Experimental and numerical analysis of simultaneous heating and cooling of phase change material for continuous application

  • 期刊论文

  • 发表日期：

    2025年3月1日

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  • Shyam Kumar Rajak,
  • Akash Raj,
  • Vinamr Saksena,
  • Rishabh Kumar Jha,
  • Pallavi Kumari,
  • Debasree Ghosh

摘要

Phase change materials (PCMs) have garnered significant attention in recent years for their potential to store thermal energy to reduce conventional energy consumption. A concentric cylinder model has been employed, with constant heating from the inner walls, while PCM and water occupy the middle and outer annulus, respectively. This setup is utilized to demonstrate experimental and numerical investigations into the simultaneous cooling and heating of paraffin wax PCM (RT50) under various thermal boundary conditions. The aim is to understand its behavior and explore potential applications in energy-efficient power cycles. The experiment and computational fluid dynamics (CFD) simulation results have been presented. Simulations facilitated the manipulation of variables, making it easier to analyze the system. The numerical is repeated with constant isothermal heating of PCM at 348 K and its simultaneous cooling under different thermal boundary conditions (adiabatic and isothermal:273 K and 300 K) of outer walls of the cooling chamber (CCOW). Temperature control is pivotal for maintaining PCM in the transition phase. The effect of different source temperatures (348 K and 358 K) and sink temperatures on different coolants (ice, cold, and normal water and ambient air) was also studied experimentally. Through precise temperature control of the source and sink, it is possible to keep PCM in the transitional phase serving as an efficient heat exchanger in continuous operation. It is crucial to keep the cooling medium at a low isothermal temperature which extends the transition stage. This study facilitates the capturing and recycling of sensible heat, thereby improving the energy efficiency of continuous cooling systems.