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Unformatted text preview: energy into the tank is: rF1 H 1 + DH Where, DH is the heat supplied by 40 psi steam per unit vo lume. The output of total energy fro m the tank is: rF2 H 2 . The energy balance may be wr itten as: d (r C p (T  T ))
V
2
ref dt = rF1 C p (T  T )  rF2 C p (T  T ) + DH 1
ref 2
ref Subst ituting for rV = rAh , we get
d (rAhC p (T  T ))
2
ref dt = rF1 C p (T  T )  rF2 C p (T  T ) + DH 1
ref 2
ref Assuming Tref = 0, we will have:
A d (hT ) DH 2
= F1 T  F2T + 2 1
dt rC p Using the product rule:
d (hT ) dT dh 2
A = Ah 2 + AT 2
d t d t d t Subst ituting this into the above equat ion, we get: dT DH dh Ah 2 = F1 T  F2 T + 2
 AT 1
2
dt rC p dt dh From Equation 1, we have the term A in the above equat ion. Therefore, the energy d t balance results in the fo llowing equation:
æ
dT DH Q ö
Ah 2 = F T  F T +
 T ç F  F + ÷
1 1
22
2ç 1
2
d t r p C
r÷
è
ø Simplifying results in the fo llowing equation: dT DH Q Ah 2 = F1 T  F1 T +
 T 1 2
2
dt r p C
r Equation 2 4. A liquidphase isothermal react ion takes place in a cont inuously st irred tank reactor. The react ion is second order and the outlet flo w rate depends linearly o n the liquid vo lu...
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This note was uploaded on 01/12/2014 for the course CHE 4198 taught by Professor Hjortso,m during the Fall '08 term at LSU.
 Fall '08
 Hjortso,M
 Chromatography, pH

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