ADAPTATION OF INDUSTRIAL/COMMERCIAL AIR-CONDITIONERS FOR USE IN A THERMALLY STRESSFUL ENVIRONMENT

1. The concept of intermittent, microclimate cooling during rest periods has been investigated due to the logistical and ergonomic problems associated with backpack cooling systems. 2. In an attempt to improve intermittent cooling applications, the use of industrial/commercial air conditioners (ICAC) as a source of cool air was conceived. 3. In the current study, a prototype of a pressurized air distribution unit (PADU) which can be incorporated into existing ICAC was designed and fabricated. 4. In a successful test, an ICAC circulated air and cooled it down to the set temperature, while the PADU pumped 510 1/min (the specified air volume for one person) of 15 degrees C into each air cooling vest, 460 1/min to the body and 50 1/min to the face, through filters and 10 ft/1 in. diameter supply line. 5. The PADU is necessary to increase the air pressure in the system, creating the required air volume. 6. This promising concept adapts existing ICAC to provide adequate amounts of clean, cool air to individuals working in thermally stressful environments. 7. This development effectively increases the conditioned air sources-available for use in decreasing heat storage and increasing personal comfort in military or civilian scenarios where work is conducted in protective garments.