ME 405
Fall 2006
Professor John M. Cimbala Lecture 20
Today, we will:
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Discuss Wall Losses in Section 5.5
Discuss how to measure the wall loss coefficient
Discuss Recirculation in Section 5.6
Do some example problems
10/23/2006
Section 5.6 – Recirculation
Qs = Q
V, c(t)
cs
Qe = Q
Qd = fQ
c
cd = c
kwAsc
Qr = (1-f)Q c
S
Fan
Qs = Q
cs
Air cleaner
η
Qs
Qm = fQ
c1 = ?
cm = ca