PERFORMANCE OF ASPEN WOOD EXCELSIOR FOR USE IN EVAPORATIVE COOLERS
Abstract
Evaporative coolers are devices which have potential application in shelter ventilation and cooling equipment systems analysis. Results are reported of laboratory tests conducted to determine the saturating effectiveness and air flow resistance of aspen wood excelsior when used as the water evaporating media in a drip-type evaporative air cooler. The saturating effectiveness for the 2-in. thick pad of 1.5 lb/cu. ft. of cell volume decreased steadily from 92% at 100 ft/min. face velocity to 73% at 500 ft/min. Doubling the thickness resulted in a saturating effectiveness that was almost independent of the face velocity and constant at 97%, while doubling the media mass density gave a saturating effectiveness that varied from 97% to 100 ft/min. to 91% at 500 ft/min. To obtain these saturation effectivenesses, the quantity of water recirculated in the drip-type cooler must exceed 5 times the amount evaporated into the air. The air flow resistance of the 2-in. thick pad ranged from 0.017 in. of water at 150 ft/min. to 0.09 in. of water at 400 ft/min. Doubling the thickness of the pad resulted in an air flow resistance which was twice that of the 2-in. pad, while doubling the density increased the air flow resistance by more than three times that of the 2-in. pad.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1967
- Accession Number
- AD0655905
Entities
People
- H. F. Behls
- R. H. Henninger