Emissivity Estimation Using Thermographic Camera

Nunak, Navaphattra; Roonprasang, Kiattisak; Suesut, T.; Nunak, T.

doi:10.4028/www.scientific.net/amr.811.380

Cited by 9 publications

(4 citation statements)

References 11 publications

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“…It is evident that certain linear dimensions, specifically length ( L ), longitudinal diameter ( D a ), and transverse diameter ( D g ), exhibit the strongest correlation with fruit mass. These dimensions are crucial in grading and sizing date samples, widely recognized as essential physical parameters for these purposes (Ilić et al., 2019; Nunak & Suesut, 2007).…”

Section: Resultsmentioning

confidence: 99%

Physical properties and mass models of Deglet Noor and Arichti semi‐dry Algerian date fruits: A comparative study

Roumani,

Remmani,

Miladi

et al. 2024

Food Science & Nutrition

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For thousands of years, date fruit (Phoenix dactylifera L.) has been a popular diet in arid and semi‐arid locations. It has religious importance for Muslims and is especially important during the holy month of Ramadan. The global output of date fruits has been continuously expanding, with Arab nations accounting for a sizable portion. The emphasis of this research is on two popular semi‐dry Algerian date fruit types, Deglet Noor and Arechti, which are grown in the Ziban region. These fruits' physical parameters, such as size, sphericity, surface area, volumes, and density, were determined. The goal of this study was to create a mass model based on these physical attributes to help in the grading and sorting of date fruits. Fruit mass was shown to be closely connected to linear dimensions, arithmetic and geometric mean diameters, surface area, and volumes. Correlations between mass and physical attributes were established using a variety of mathematical models, including linear, quadratic, S‐curve, and power models. The results demonstrated the applicability of specific factors for mass modeling, offering useful insights for the development of system sizing and conservation. With good correlation, multivariate data analysis was employed to correctly estimate the mass of both kinds. This research advances our understanding of the physical features of Algerian date fruits and their connection to mass, allowing for better handling, sorting, and packing processes in the worldwide date market.

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Section: Resultsmentioning

confidence: 99%

Physical properties and mass models of Deglet Noor and Arichti semi‐dry Algerian date fruits: A comparative study

Roumani,

Remmani,

Miladi

et al. 2024

Food Science & Nutrition

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Section: Introductionmentioning

confidence: 99%

“…The measurement of emissivity needs to consider material type, temperature, roughness, angle and direction of emission, wavelength or spectrum of the infrared radiation, and reflection on the surface from the surroundings (R). 13,14 Tadesse et al 15 used six k-type thermocouples tests to record experimentally the temperature distribution in a turbine housing. Also, an infrared thermography camera was used to determine the emission coefficient and temperature distribution of the turbine and bearing housings.…”

Section: Introductionmentioning

confidence: 99%

Comparison of simulation and experimental test results of the turbocharger temperature for two gasoline direct injection engines

Basir

Rosen

2022

Proceedings of the Institution of Mechanical Engineers, Part E:

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Understanding heat delivery in a multifaceted and vital engine component, such as the turbocharger, is important for improving engine performance and efficiency, but it is challenging to determine. In this paper, the temperature distribution in a turbocharger body was measured experimentally using a thermal camera, and a one-dimensional simulation of a turbocharger was developed for the temperature distribution. As part of the work, an innovative method is used to determine the thermal radiation constant of the turbocharger housing. In this method, the complete turbocharger system was first installed in a laboratory furnace and, at each stage, the temperature of the furnace was carefully adjusted. After temperature stabilization, a thermal image was taken with a thermal camera, and the radiation coefficient was obtained. Finally, a measurement of the temperature distribution was performed on the engine's test cell for the turbochargers of two three-cylinder gasoline engines (i.e. engines 1200 cc and 999 cc). The experiments include steady-state and transient tests. The transient tests include hot and cold tests at various operating conditions. The results showed that the maximum temperature of the turbine housing varies linearly with inlet gas temperature. Also, the axial distribution of the temperature in the compressor volute shows that temperature increases from the inlet side to the bearing housing side. Based on the numerical results, the maximum turbine housing temperature for engine 1200 cc is 679 °C and for engine 999 cc is 523 °C.

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“…For instance, the emissivity of glossy transparent glass ranges from 0.90 to 0.97; for glass materials with a reflective metal layer, it is even within the range of 0.20–0.89 (Arasteh, 1991; Ghosh et al, 2014). Very low emissivity (0.02–0.20) occurs with polished metal materials, such as stainless steel, copper and gold (Nunak et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Infrared thermographic measurement of the surface temperature and emissivity of glossy materials

Alexa

Solař

Čmiel

et al. 2017

Journal of Building Physics

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Determination of the surface temperature and emissivity of glossy materials is a complicated task due to the relatively wide range of emissivity values and the reflection of infrared radiation from surrounding objects. As a consequence, standard methods used in infrared thermography are not applicable. In this article, an alternative method is proposed for the measurement of the surface temperature and emissivity of glossy materials used in the external structures of buildings that is based on an external source of thermal radiation. It is shown that the method gives quite accurate values of emissivity of both low-and high-emissivity glossy materials, whereas the surface temperature of low-emissivity glossy materials is less accurate and strongly depends on the accuracy of the used thermal camera.

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Emissivity Estimation Using Thermographic Camera

Cited by 9 publications

References 11 publications

Physical properties and mass models of Deglet Noor and Arichti semi‐dry Algerian date fruits: A comparative study

Physical properties and mass models of Deglet Noor and Arichti semi‐dry Algerian date fruits: A comparative study

Comparison of simulation and experimental test results of the turbocharger temperature for two gasoline direct injection engines

Infrared thermographic measurement of the surface temperature and emissivity of glossy materials

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