Wearable air conditioners

April 1, 2004
Protective suits isolate wearers from chemical and biological weapons. But body heat generated inside the suits can be a problem. Researchers from Pacific Northwest National Laboratory aim to change that.
This is an artist's rendering of a manportable cooling system. The unit, weighing approximately 3 to 4 lb, provides chilled water that flows through a vest (not shown) to keep the wearer comfortable.

 

They are developing a heat-actuated lightweight and compact cooling unit capable of keeping down temperatures within protective suits for several hours. Chilled water circulates through a vest, and is capable of providing relief up to 6 hr. The chilled-water loop is itself cooled by a heat exchanger in an absorption-cycle cooling system. Here, a thermochemical compressor -- powered by thermal energy from the burning of a fuel such as propane -- circulates refrigerant through the heat exchanger. Such heat-actuated compressors consume much less power than their electromechanical counterparts, making them well suited for portable refrigeration applications.

Sponsored Recommendations

June 27, 2025
Ensure workplace safety and compliance with our comprehensive Lockout/Tagout (LOTO) Safety Training course. Learn critical procedures to prevent serious injuries.
June 27, 2025
Join our expert webinar to discover essential safety control measures and best practices for engineering a truly safe and compliant industrial environment.
June 25, 2025
An innovative aircraft with electric drives combines the best of both worlds. The cross between drone and helicopter could mean significantly faster and more efficient air emergency...
June 25, 2025
Effective when other materials fail, ceramics are particularly suitable for applications requiring wear and chemical resistance, sliding characteristics or biocompatibility. Discover...

Voice your opinion!

To join the conversation, and become an exclusive member of Machine Design, create an account today!