Physiological Responses to a Prototype Hybrid Air-Liquid Microclimate Cooling System During Exercise in the Heat

Abstract

The effectiveness of a prototype air-liquid hybrid microclimate cooling system was compared to previously developed air- and liquid-cooled systems to assess heat stress reduction during physical exercise. This hybrid system could be used by combat vehicle crewmen needing both types of cooling for mounted and dismounted activities. All subjects completed the 120 minutes of exercise with all four microclimate cooling systems. The data demonstrate that the prototype air-liquid hybrid microclimate cooling system allowed the same endurance time (ET) as the air (A) and liquid (L) systems. However, the small but significantly greater thermal strain shown with the hybrid-liquid configuration relative to the air (A) system indicates a potential need for an alteration in the amount of cooling provided for the HL configuration, as it had lowest calculated cooling capacity of all the systems.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1988
Accession Number
ADA194759

Entities

People

  • Andrew J Young
  • Barry S. Decristofano
  • Bruce S. Cadarette
  • Karen L. Speckman
  • Michael N. Sawka

Organizations

  • United States Army Research Institute of Environmental Medicine

Tags

Communities of Interest

  • Biomedical

DTIC Thesaurus Topics

  • Abstracts
  • Air Cooled
  • Biological Sciences
  • Biomedical Research
  • Body Regions
  • Butyl Rubber
  • Classification
  • Combat Vehicles
  • Cooling
  • Data Analysis
  • Gas Masks
  • Heart Rate
  • Military Research
  • Security
  • Sensation
  • Stress Tests
  • Temperature Gradients

Readers

  • Materials Science
  • Solar Photovoltaics and Thermoelectric Devices.
  • Systems Analysis and Design