Heat-Driven Fan for Tent Habitability Improvement
Technical rept. Nov 1980-Sep 1982
ARMY NATICK RESEARCH AND DEVELOPMENT CENTER MA
Pagination or Media Count:
This exploratory development effort investigated one method of improving cold weather tent habitability, the circulation of heated air. Tests were carried out to determine the quantity of air necessary to substantially reduce the thermal gradient in a GP Medium and Frame-Type Expandable tent. It was found that 5-W was enough power to operate a 30-cm diameter fan at 700 RPM, which reduced the thermal gradient 62. A 5-W thermoelectric module was purchased, and finned heat exchangers were designed to provide a 200 C temperature difference across the module, using the space heater exhaust as a heat source. Although an appropriate low voltage motor could not be located, a prototype demonstration model using a poorly-matched motor achieved 80 of the desired fan speed, proving the feasibility of a heat-driven fan.
- Air Conditioning, Heating, Lighting and Ventilating
- Structural Engineering and Building Technology