1) Write a C MEX-file that will do the following conversions:
a) joule to erg (1 J = 10
7
erg)
b) cP to lb
f
-s/ft
2
( 1 cP = 2.0886 × 10
-5
lb
f
-s/ft
2
)
c) atm to mmHg ( 1 atm = 760 mmHg)
d) hp to kW (1 hp= 0.74570 kW)
2) Fifteen thousand kg/h of a 5
o
Bx sugar solution at 50
o
C is concentrated to
15
o
C Bx in a forward-feed quadruple-effect evaporator. Saturated steam is
utilized at 125
o
C. The temperature at the last effect is maintained at 105
o
C so
as not to caramelize the sugar crystals. The overall heat transfer coefficients
(OHTC) at each effect are 50,100,150, and 200 W/m
2
-K.
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