Application of Baseline Correction Techniques to the “Ratio Method” of DSC Specific Heat Determination

“…Since this assumption is not practical when operating in a hot cell environment with small samples, the specific heat capacity of each sample was calculated by employing a modified version of the ratio method to correct for potential baseline shift, provided in Eq. 1 [9]. In Eq.…”

Section: Differential Scanning Calorimetrymentioning

confidence: 92%

“…This can be checked by estimating an effective underlying baseline shift, δ eff S (T ), between the baseline and reference/sample runs that would be necessary to ensure equality of the heating and cooling specific-heat-capacity results, defined by Eq. 5 [9].…”

Section: Differential Scanning Calorimetrymentioning

confidence: 97%

Development and Validation of Capabilities to Measure Thermal Properties of Layered Monolithic U–Mo Alloy Plate-Type Fuel

et al. 2014

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The uranium-molybdenum (U-Mo) alloy in a monolithic form has been proposed as one fuel design capable of converting some of the world's highest power research reactors from the use of high enriched uranium to low enriched uranium. One aspect of the fuel development and qualification process is to demonstrate appropriate understanding of the thermal-conductivity behavior of the fuel system as a function of temperature and expected irradiation conditions. The purpose of this paper is to verify functionality of equipment installed in hot cells for eventual measurements on irradiated uranium-molybdenum (U-Mo) monolithic fuel specimens, refine procedures to operate the equipment, and validate models to extract the desired thermal properties. The results presented here demonstrate the adequacy of the equipment, procedures, and models that have been developed for this purpose based on measurements conducted on surrogate depleted uranium-molybdenum (DU-Mo) alloy samples containing a Zr diffusion barrier and clad in aluminum alloy 6061 (AA6061). The results are in excellent agreement with thermal property data reported in the literature for similar U-Mo alloys as a function of temperature.

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“…The sapphire method for cp determination was used as this method produces an accuracy that is within ± 2% [10,12]. This method has been experimentally noted to have a variation of ± 5% for the value of sapphire material [17].…”

Section: Experimental/operating Proceduresmentioning

confidence: 99%

Measurements of specific heat capacity of common building materials at elevated temperatures: a comparison of DSC and HDA

Pooley

Abu-Bakar

Cran

et al. 2019

J Therm Anal Calorim

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The objective of this study is to investigate how the specific heat capacity (cp) value of a material changes with respect to temperature and heating rate of that material. In-depth knowledge in the variation of cp will provide a better knowledge of the thermo-physical properties of these materials and will increase the capabilities and fidelity of computational fluid dynamics (CFD) based fire modelling. The models and simulations are reliant on input data gained through experimentation and this allows for the present study to provide such input data and trends, which are useful in understanding how fires respond in different situations. The value of cp in relation to the rate of temperature change has been measured using differential scanning calorimetry (DSC) and hot disk analysis (HDA). This study encapsulates the determination of cp values, trends and equations for poly(methyl methacrylate (PMMA), pinewood, pinewood char and two fabrics: cotton and wool. The cp values were found to increase with the sample temperature and for two fabrics, they vary with the change in heating rate. The derived equations show that cp values from DSC and HDA are comparable. To include these relationships in CFD-based fire models, a set of suggestions have been made.

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Application of Baseline Correction Techniques to the “Ratio Method” of DSC Specific Heat Determination

Cited by 10 publications

References 2 publications

Thermal properties of U–Mo alloys irradiated to moderate burnup and power

Thermal properties of U–Mo alloys irradiated to moderate burnup and power

Development and Validation of Capabilities to Measure Thermal Properties of Layered Monolithic U–Mo Alloy Plate-Type Fuel

Measurements of specific heat capacity of common building materials at elevated temperatures: a comparison of DSC and HDA

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