Testing the reliability of new developed firmware for controlling NIS climatic chamber

El-Matarawey, A.; Abd-ElGalil, Doaa.M.; El-Dien, Eman Mohy

doi:10.1016/j.measurement.2022.111366

Cited by 1 publication

(1 citation statement)

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“…Our mission is to maintain, disseminate and develop the unit of thermodynamic temperature that was defined by the Boltzmann constant in the advanced research branch and the approximated thermodynamic temperature that was realized by the International Temperature Scale 1990 (ITS-90). Furthermore, there are another mission for ThML is to introduce the industrial routine calibration, thermal exposure, viscosity, humidity, thermal conductivity, and more services that are traceable to ITS-90 [1][2][3][4][5][6][7][8]. Thermal conductivity is a physical quantity that must be taken into consideration when evaluating building materials, as it is one of the most important requirements, especially in extreme areas in high or low temperatures in a thermal climate.…”

Section: Introductionmentioning

confidence: 99%

Determination of Al2O3 Powder Thermal Conductivity Using DSC at NIS-Egypt

Abd-ElGaliel

El-Matarawy

El-Dien

2022

ARFMTS

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The mission of the thermal metrology laboratory is to maintain, disseminate, develop and realize the International Temperature Scale 1990 (ITS-90). One of the services that the laboratory has introduced is the routine calibration to all industrial sectors that covers almost all fields inside and outside Egypt. This paper explains how to use Differential Scanning Calorimeter (DSC) to determine the thermal conductivity of unknown powders. The paper is based on the ability to determine the thermal conductivity (k) of powders from the melting peak of the reference metal. This technique assists for the first time to establish a new activity at the National Institute for Standardization to test the thermal conductivity of powders, which had been requested by many clients. Experiments were carried out using alumina powder Al2O3 and metal reference beads of Sn and Zn which have diameter ranges from 1.9 mm up to 4.12 mm in an atmosphere of nitrogen during Sn and Zn melting. The results show good performance. The results showed confidence that will enable to do more studies at NIS to see if this technology can be applied to a wider spectrum of materials.

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