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Calorimeter

About: Calorimeter is a research topic. Over the lifetime, 5878 publications have been published within this topic receiving 77157 citations.


Papers
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Journal ArticleDOI
TL;DR: In this article, the relationship between physical properties and fire performance as measured in the cone calorimeter is not well understood, and a number of studies have identified relationships between the physical and chemical properties of polymeric materials and their gasification behavior which can be determined through numerical pyrolysis models.
Abstract: The relationship between physical properties and fire performance as measured in the cone calorimeter is not well understood. A number of studies have identified relationships between the physical and chemical properties of polymeric materials and their gasification behaviour which can be determined through numerical pyrolysis models. ThermaKin, a one-dimensional pyrolysis model, has recently been employed to predict the burning behaviour in fire calorimetry experiments. The range of thermal, chemical and optical properties of various polymers have been utilised to simulate the processes occurring within a polymer exposed to a uniform heat flux, such as in a cone calorimeter. ThermaKin uses these material properties to predict the mass flux history in a cone calorimeter. Multiplying the mass flux history by the heat of combustion of the fuel gases gives the HRR history and these have been calculated for cone calorimeter experiments at 50 kW m-2 incident heat flux for the lowest, average and highest values of physical parameters exhibited by common polymers. In contrast with actual experiments in fire retardancy, where several parameters change on incorporation of an additive, this study allows for the effect of each parameter to be seen in isolation. The parameters used in this study are grouped into physical properties (density, heat capacity and thermal conductivity), optical properties (absorption and reflectivity), and chemical properties (heat of decomposition, kinetic parameter and heat of combustion). The study shows how the thermal decomposition kinetic parameters effect the surface burning (pyrolysis) temperature and resulting heat release rate history, as well as the relative importance of other properties directly related to the chemical composition. It also illustrates the effect of thermal inertia (the product of density, heat capacity and thermal conductivity) and of the samples’ ability to absorb radiant heat.

52 citations

Journal ArticleDOI
TL;DR: In this paper, the formation enthalpies of solid alloys in the Fe, Co, Ni, and Ni binary systems have been determined with the aid of a solution calorimeter using liquid tin as solvent.

52 citations

Journal ArticleDOI
TL;DR: In this paper, the isothermal displacement calorimeter described in previous publications has been modified and rebuilt and constructional details are given and results for the systems cyclohexane + n -hexane and benzene + cyclo-hexane, both at 25 °C, are compared with the results from earlier models.

52 citations

Journal ArticleDOI
TL;DR: In this article, the authors present model development, dynamic analysis and model validation for the purpose of estimating online the reactor states and parameters, which is reported in Part II, and the validity of the dynamic model for both parameter and state estimation is assessed.

51 citations

Journal ArticleDOI
TL;DR: In this article, a controlled thermal explosion in which methyl isocyanide isomerises quantitatively to methyl cyanide has been studied in a calorimeter at 300 K.
Abstract: A controlled thermal explosion in which methyl isocyanide isomerises quantitatively to methyl cyanide has been studied in a calorimeter at 300 K. The enthalpy of isomerisation ΔH = −23.70 ± 0.14 (2...

51 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20224
202193
2020142
2019113
2018150
2017160