NDLI: An Improved Thermoregulatory Model for Cooling Garment Applications With Transient Metabolic Rates

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Johan, K. Westin Jayanta, S. Kapat Louis, C. Chow
Copyright Year	2008
Abstract	Current state-of-the-art thermoregulatory models do not predict body temperatures with the accuracies that are required for the development of automatic cooling control in liquid cooling garment (LCG) systems. Automatic cooling control would be beneficial in a variety of space, aviation, military, and industrial environments for optimizing cooling efficiency, for making LCGs as portable and practical as possible, for alleviating the individual from manual cooling control, and for improving thermal comfort and cognitive performance. In this paper, we modify the blood flow dynamics of a state-of-the-art thermoregulatory model and identify a new signal, i.e. the rate of change of hypothalamus temperature weighted by the hypothalamus error signal, which governs the thermoregulatory response during conditions of simultaneously increasing core and decreasing skin temperatures. We compare temperature predictions with experimental data for a 700 W rectangular type activity schedule in an LCG environment. The new thermoregulatory model predicts rectal and mean skin temperatures with root mean square deviations of 0.09°C and 0.69°C, respectively, which results in a 44% reduction of the mean absolute body heat storage error. It appears that the new thermoregulatory model can, with some additional improvements outlined here, satisfy the very strict accuracy requirement that is needed for automatic cooling control development.
Starting Page	1287
Ending Page	1296
Page Count	10
File Format	PDF
ISBN	9780791848715
DOI	10.1115/IMECE2008-68943
e-ISBN	9780791838402
Volume Number	Volume 10: Heat Transfer, Fluid Flows, and Thermal Systems, Parts A, B, and C
Conference Proceedings	ASME 2008 International Mechanical Engineering Congress and Exposition
Language	English
Publisher Date	2008-10-31
Publisher Place	Boston, Massachusetts, USA
Access Restriction	Subscribed
Subject Keyword	Errors Temperature Cooling Aviation Dynamics (mechanics) Heat storage Military systems Skin Signals Transients (dynamics) Blood flow
Content Type	Text
Resource Type	Article

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