ERIC Number: ED241757
Record Type: RIE
Publication Date: 1983-Oct
Reference Count: 0
An Evaluation of a Welding Fumes Exhaust System. Agricultural Experiment Station Research Report 284.
Jacobs, C. O.
A study evaluated the feasibility of introducing unheated outside air into the airstream of a cross-flow welding exhaust system to reduce heating energy costs of a school welding laboratory. The physical facility used was the agricultural mechanics laboratory at the University of Arizona, which is similar to facilities in which instruction in agricultural mechanics is conducted in Arizona high schools offering vocational agriculture. An air change system was incorporated into the existing welding fume exhaust system and evaluated on its ability to conserve heat energy, to complement and enhance the efficiency of the cross-flow system, and to capture and exhaust welding fumes. Data analyses revealed that heat loss from the welding laboratory was reduced approximately 48 percent. The air charge system complemented the cross-flow exhaust system by increasing the capture velocity of airflow toward the intake boot of the system at the surface of the welding table. When maximum air charge was used, the amount of iron oxide breathed by the student welder was reduced by 23 percent compared to the amount inhaled when welding fumes were exhausted only by the cross-flow ventilating system. (YLB)
Publication Type: Reports - Evaluative
Education Level: N/A
Authoring Institution: Arizona Univ., Tucson. Agricultural Experiment Station.