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ME405_Lecture_21

ME405_Lecture_21 - ME 405 Fall 2006 Professor John M...

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ME 405 Fall 2006 Professor John M. Cimbala Lecture 21 10/25/2006 Today, we will : Briefly discuss Partially Mixed Conditions in Section 5.7 Discuss The Well-Mixed Model as an Experimental Tool in Section 5.8 Discuss Clean Rooms in Section 5.9 Do an example problem – Clean rooms (Example 5.10 in text) Discuss Infiltration in Section 5.10 Do an example problem – The Professor’s office (Example 5.11 in text)
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Example Given : The room shown, with clean air supplied, and a room air cleaner running. S V , c ( t ) Q s Q cleaner Air cleaner η cleaner k w A s c c s = 0 Q s c To contaminant analyzer Q cleaner To do : Derive an expression for the efficiency of the air cleaner. Solution :
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Section 5.9: Clean Rooms (a) (b) (c) (d) (e) (f) Figure 5.11 Clean rooms: (a) vertical laminar-flow, (b) horizontal laminar-flow, (c) tunnel laminar-flow, (d) tabletop tunnel laminar-flow, (e) island laminar-flow, and (f) unitary work station (miniature) (from Canon Communications, 1987).
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Table 5.2 Clean room class limits; maximum permissible c number in English and SI units; bold
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ME405_Lecture_21 - ME 405 Fall 2006 Professor John M...

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