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28/11/2013<br />

Massgenomgång<br />

Massgenomgång • Massöverföring<br />

N<br />

N<br />

Kc 1<br />

c 2<br />

<br />

k1c<br />

1<br />

c1,<br />

w<br />

<br />

A<br />

A<br />

N<br />

k2c2,<br />

w<br />

c2<br />

<br />

A<br />

• Diffusion<br />

N D<br />

c1 , w<br />

c2,<br />

w<br />

<br />

c 2<br />

A b<br />

d t,2<br />

c 1<br />

d t,1<br />

Strömningsgränsskikt<br />

Transportprocesser, KETF01<br />

• och<br />

massgenomgångstal<br />

1 1<br />

<br />

K k<br />

1<br />

b<br />

D<br />

1<br />

<br />

k<br />

2<br />

F15 – Masstransport 4<br />

Massväxlare<br />

• Materialbalans<br />

– Blodsida<br />

– Dialyssida<br />

• Masstransport<br />

N K<br />

<br />

Transportprocesser, KETF01<br />

NA<br />

0 Fb<br />

cb,<br />

in<br />

cb,<br />

c1<br />

c<br />

c1<br />

ln<br />

c<br />

2<br />

ut<br />

2<br />

<br />

<br />

c<br />

c <br />

NA<br />

0 Fd<br />

d , in d ,<br />

ut<br />

Motströms!<br />

c<br />

c<br />

c<br />

• Logaritmisk<br />

medelkoncentrationensskillnad<br />

c1<br />

c2<br />

<br />

c L<br />

<br />

c1<br />

ln<br />

c F15 – Masstransport 4<br />

2<br />

1<br />

2<br />

c<br />

b,<br />

in<br />

b,<br />

ut<br />

c<br />

c<br />

d , ut<br />

d , in<br />

10

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