This paper presents a comprehensive analysis of the heat transfer during the melting process of a high temperature (> 800°C) PCM encapsulated in a vertical cylindrical container. The energy contributions from radiation, natural convection and conduction have been included in the mathematical model in order to capture most of the physics that describe and characterize the problem and quantify the role that each mechanism plays during the phase change process. Numerical predictions based on the finite volume method has been obtained by solving the mass, momentum and energy conservation principles along with the enthalpy porosity method to track the liquid/solid interface. Experiments were conducted to obtain the temperature response of the TES-cell during the sensible heating and phase change regions of the PCM. Continuous temperature measurements of porcelain crucibles filled with ACS grade NaCl were recorded. The temperature readings were recorded at the center of the sample and at the wall of the crucible as the samples were heated in a furnace over a temperature range of 700 °C to 850 °C. The numerical predictions have been validated by the experimental results and the effect of the controlling parameters of the system on the melt fraction rate, total and radiative heat transfer rates at the inner surface of the cell have been evaluated. Results showed that the natural convection is the dominant heat transfer mechanism. In all the experimental study cases, the measured temperature response captures the PCM melting trends with acceptable repeatability. The uncertainty analysis of the experiment yielded an approximate error of ±5.81°C.
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ASME 2014 International Mechanical Engineering Congress and Exposition
November 14–20, 2014
Montreal, Quebec, Canada
Conference Sponsors:
- ASME
ISBN:
978-0-7918-4952-1
PROCEEDINGS PAPER
Thermal Assessment of a Latent Heat Energy Storage Module Using a High Temperature Phase Change Material With Enhanced Radiative Properties Available to Purchase
Antonio Ramos Archibold,
Antonio Ramos Archibold
University of South Florida, Tampa, FL
Universidad Autónoma del Caribe, Barranquilla, Colombia
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Abhinav Bhardwaj,
Abhinav Bhardwaj
University of South Florida, Tampa, FL
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Muhammad M. Rahman,
Muhammad M. Rahman
University of South Florida, Tampa, FL
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D. Yogi Goswami,
D. Yogi Goswami
University of South Florida, Tampa, FL
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Elias L. Stefanakos
Elias L. Stefanakos
University of South Florida, Tampa, FL
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Antonio Ramos Archibold
University of South Florida, Tampa, FL
Universidad Autónoma del Caribe, Barranquilla, Colombia
Abhinav Bhardwaj
University of South Florida, Tampa, FL
Muhammad M. Rahman
University of South Florida, Tampa, FL
D. Yogi Goswami
University of South Florida, Tampa, FL
Elias L. Stefanakos
University of South Florida, Tampa, FL
Paper No:
IMECE2014-38390, V06BT07A051; 8 pages
Published Online:
March 13, 2015
Citation
Archibold, AR, Bhardwaj, A, Rahman, MM, Goswami, DY, & Stefanakos, EL. "Thermal Assessment of a Latent Heat Energy Storage Module Using a High Temperature Phase Change Material With Enhanced Radiative Properties." Proceedings of the ASME 2014 International Mechanical Engineering Congress and Exposition. Volume 6B: Energy. Montreal, Quebec, Canada. November 14–20, 2014. V06BT07A051. ASME. https://doi.org/10.1115/IMECE2014-38390
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