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    Dataset of air velocity and temperature fields inside an insulated box equipped with phase change material under several operating conditions
    (2024-02-01)
    Leungtongkum, Tanathep
    ;
    Flick, Denis
    ;
    Chaomuang, Nattawut
    ;
    Denis, Alain
    ;
    Laguerre, Onrawee
    This article contains a description of protocol to measure air velocity field (by Particle Image Velocimetry - PIV) and temperature field (by T-type thermocouples) in an insulated box equipped with Phase Change Material (PCM) of melting point 0 °C. The influence of various conditions was studied: i) PCM position (at sidewall and at top), ii) aspect ratio of the box (height/width ∼ 1 and 1.7), iii) ambient temperature (10 °C, 20 °C and 30 °C), iv) test product initial temperature (4 °C and 10 °C) and vi) spacing beneath the load (0 mm and 20 mm). This article is related to a published research paper, it provides the dataset of all experiments which can be useful for experimenter to understand the phenomena and for expert in numerical model to validate the developed model e.g., by Computational Fluid Dynamic.
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    Influence of use conditions on heat transfer in an insulated box equipped with a phase change material
    (2023-11-01)
    Leungtongkum, Tanathep
    ;
    Flick, Denis
    ;
    Chaomuang, Nattawut
    ;
    Denis, Alain
    ;
    Laguerre, Onrawee
    An insulated box with Phase Change Material (PCM – ice, melting point ∼ 0 °C) and loaded by test product (Tylose) was investigated experimentally to study the effect of the PCM position, Aspect Ratio (AR = height/width) of box, ambient temperature, initial test product temperature and spacing beneath the test product. The temperature and the air velocity measured by thermocouples and Particle Image Velocimetry (PIV), respectively, were analyzed under stable conditions. The maximum product temperature was lower for PCM at the top (6.6 °C, AR ≈ 1) than for PCM on a sidewall (7.7 °C, AR ≈ 1) and increased with AR (9.9 °C, AR ≈ 1.7). A non-linear relation between ambient temperature and product temperature was observed with the maximum product temperature from 5.2 °C (10 °C ambient) to 9.1 °C (30 °C ambient). The influence of spacing beneath the product was negligible despite different airflow patterns. Simple equations were proposed to predict the maximum storage time and mean temperature in the box enabling us to study the influence of PCM and product mass, melting point, box insulation and ambient temperature.
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    Experimental investigation of airflow and heat transfer by natural convection in an insulated box with a Phase Change Material using a Particle Image Velocimetry technique
    (2023-01-01)
    Leungtongkum, Tanathep
    ;
    Laguerre, Onrawee
    ;
    Flick, Denis
    ;
    Denis, Alain
    ;
    Duret, Steven
    Airflow and heat transfer via natural convection in an insulated box with Phase Change Material (PCM) were experimentally investigated using Particle Image Velocimetry (PIV) and temperature measurements. The effects of PCM positions (side wall and lid) on flow pattern and temperature distribution were studied under empty and loaded conditions. Two loads were considered to study the obstacle effect and the influence of heat exchange with air. When PCM was either at the side wall or at the lid of the box, laminar flow was observed and the corresponding Rayleigh number was about 10<sup>7</sup>. Upward flow was always observed near the side walls of the box. When PCM was on the side, downward flow occurred along the PCM; in the empty case, flow was almost 2D but became 3D when the load was added. When PCM was on the lid, the air cooled in contact with PCM, detached from it and flowed downwards. In the empty case, downward flow was unstable, and with the load, it followed preferential pathways. The type of load exerted little effect on flow patterns at thermal steady state. Thus, a simpler load (extruded polystyrene) can be used in the first approach. The maximum velocity was about 0.1 m s<sup>−1</sup>, so free convection cannot be neglected compared with conduction. Regarding temperature performance, PCM on the side and on the lid showed no substantial difference if gaps were left between the load and the walls or PCM.
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    Dataset of experimental study investigation of airflow and heat transfer in an insulated box equipped with a phase change material
    (2022-12-01)
    Leungtongkum, Tanathep
    ;
    Laguerre, Onrawee
    ;
    Flick, Denis
    ;
    Denis, Alain
    ;
    Duret, Steven
    This article contains a detailed description of the experimental protocol of air velocity (by particle image velocimetry - PIV) and temperature measurement (by T-type thermocouples) in an insulated box equipped with a Phase Change Material (PCM). The study was conducted in an empty box and a loaded box with extruded polystyrene slabs (XPS) and methylcellulose slabs (test product). The measurement was conducted at the middle plane and lateral plane. This article contains a complete dataset along with the illustrated figures of conducted experiment. They lead to more understanding of phenomena inside a closed cavity with a cold source and can be useful for validating numerical models, e.g., the results computed by computational fluid dynamic.
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    How to predict product temperature changes during transport in an insulated box equipped with an ice pack: Experimental versus 1-D and 3-D modelling approaches
    (2019-04-01)
    Laguerre, O.
    ;
    Chaomuang, N.
    ;
    Derens, E.
    ;
    Flick, D.
    An experiment was carried out to monitor food temperature changes with time in two insulated boxes equipped with an ice pack. The first experiment was carried out in a test room under well controlled ambient temperature and with a box of reinforce lateral insulation. The second experiment was in real use condition and with 2 different boxes. Two models were developed to predict product temperature changes until the ice is completely melted: an analytical 1-D and a 3-D model. The 1D model predictions are in good agreement for the first experiment. But in real use condition, the 1D model underestimates the temperature evolution, while the 3-D model gives better prediction. A comparison of the advantages and disadvantages of these two models was performed. The 1-D approach enables prediction of the main parameters (warmest temperature, ice melting time). A correction factor was proposed to improve the prediction precision using the 1-D model.