The Lumped Capacitance Method
The Lumped Capacitance Method
The Lumped Capacitance Method
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kA<br />
: ( Ts,1 − Ts,2 ) = hA( Ts,2<br />
−T ∞<br />
)<br />
L<br />
Tsi ,<br />
−Ts,2<br />
L/<br />
kAs Rcond<br />
hL<br />
‣ Physical Interpretation:<br />
= = = =<br />
T −T 1/ hA R k<br />
s,2<br />
∞<br />
s conv<br />
hLc<br />
Bi ≡ < 0.1 ( <strong>Lumped</strong> Heat <strong>Capacitance</strong> )<br />
k<br />
L = V / A<br />
c<br />
Plate : L = L;<br />
s<br />
c<br />
Cylinder : L = r / 2 ; Sphere : L = r /3 ( L<br />
= r )<br />
c o c o c o<br />
Bi
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