Capture Efficiency of Local Exhaust Ventilation Systems

摘要: A new technique to measure the performance of local exhaust ventilation systems has been developed and tested in both laboratory field. The involves measurement capture efficiency exterior hoods, defined be fraction contaminants given off by a process captured system serving that process. Capture can powerful tool evaluation systems, since it is direct, quantitative performance; contrast, indices now use are either qualitative or quantities which may not related directly performance. basic theory for developed, prototype measuring constructed tested. Preliminary field measurements using have demonstrated power method, should find widespread design existin...