| 摘要 |
PROBLEM TO BE SOLVED: To quantify energy uselessly consumed by keeping opening a sash when one is absent. SOLUTION: A period where the opening of the sash 2-1 exceedsθ1 min (for example, 20% opening) even if a worker to the fume hood 1-1 is absent is set to be a useless period. The total amount of minimum required exhaust air volume Q1min (for example, 20% air volume) is subtracted from the total amount of exhaust air volume Q1 from the chamber 1-1 in the useless period, thus obtaining the exhaust air volume thus obtained as a useless wind volume Q1<SB>LOS</SB>. COPYRIGHT: (C)2004,JPO
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