Thermal Stability Analysis of Black Body Equipment for High-Precision Radiometric Applications

Abstract

Black body equipment serves as the gold standard for radiometric calibration and temperature measurement due to its near-perfect emissivity and predictable spectral radiation characteristics. Ensuring thermal stability in such systems is critical to maintaining the accuracy and repeatability of infrared thermometry, thermal imaging, and radiative heat transfer experiments. This research investigates the thermal behavior of black body cavities under various operational conditions, focusing on heat retention, temperature uniformity, and response to environmental fluctuations. A comparative analysis of cavity geometries, surface coatings, insulation materials, and control systems is conducted using both experimental trials and finite element simulations. The results highlight key design parameters that affect thermal inertia, gradient minimization, and emissive consistency. Emphasis is placed on how prolonged thermal drift and control lag affect measurement reliability. The study also recommends design improvements and feedback control strategies for enhancing long-term thermal stability. These findings are particularly relevant for laboratories, aerospace calibration facilities, and thermal reference units in metrological institutions.

Cite as:

A. Awasare. (2025). Thermal Stability Analysis of Black Body Equipment for High-Precision Radiometric Applications. Recent Trends in Thermodynamics and Thermal Energy System, 1(2), 19–26. 

https://doi.org/10.5281/zenodo.16410117