Dry heat loses of newborn baby in infant care bed: use of a thermal manikin

7th European Thermal-Sciences Conference

Ostrowski, Ziemowit^1 ; Rojczyk, Marek^1 ; Szczygiel, Ireneusz^1 ; Laszczyk, Joanna^2 ; Nowak, Andrzej J.^1

Institute of Thermal Technology, Silesian University of Technology, ul. Konarskiego 22, Gliwice

44-100, Poland^1

Automotive Lighting, RandD, ul. Gen. M. Zaruskiego 11, Sosnowiec

41-200, Poland^2

关键词: Ambient air temperature;    Climate chambers;    Laboratory set-up;    Non-invasive assessments;    Single cylinders;    Substantial errors;    Surface temperatures;    Thermal condition;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/745/3/032087/pdf
DOI  :  10.1088/1742-6596/745/3/032087

来源: IOP

【 摘 要 】

The energy balance and heat exchange for newborn baby in infant care bed environment (radiant warmer) are considered. The present study was performed to assess the body dry heat loss from an infant in radiant warmer, using copper cast anthropomorphic thermal manikin and controlled climate chamber laboratory setup. The total body dry heat losses were measured for varying manikin surface temperatures (nine levels between 32.5oC and 40.1oC) and ambient air temperatures (five levels between 23.5oC and 29.7oC). Radiant heat losses were estimated based on measured climate chamber wall temperatures. After subtracting radiant part, resulting convective heat loses are compared with computed ones, based on Nu correlations for common geometries. Simplified geometry of newborn baby was represented as: (a) single cylinder and (b) weighted sum of 5 cylinders and sphere. The computed values are significantly overestimated relative to measured ones by: 28.8% (23.5%) for (a) and 40.9% (25.2%) for (b). This shows that use of adopted general purpose correlations for approximation of convective heat losses of newborn baby can lead to substantial errors, hence approximation formula is proposed. The thermal manikin appears to provide a precise method for the noninvasive assessment of thermal conditions in neonatal care.