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    Argosy University/ Phoniex University/
    Nov-2005 - Oct-2011

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    Phoniex University
    Oct-2001 - Nov-2016

Category > Management Posted 15 Feb 2018 My Price 8.00

tube heat exchanger

11.20   Consider a concentric tube heat exchanger with an area

2

 

flowing at a mean velocity of um,c 0.1 m/s with  an inlet  temperature  of  Tc,i         20°C.  The  inner  tube  of

of 50 m

operating under the following conditions:

 

diameter Di    10 mm is thin walled, and the   exterior of  the  outer  tube  (Do         20 mm)  is  well   insulated.

                                                Hot uid       Cold uid    

Heat capacity rate, kW/K                 6                     3

 

Water flows in the annular region between the tubes at

a mean velocity of um,h 0.2 m/s with an inlet temper- ature of Th,i         60°C. Properties of the   pharmaceutical

Inlet temperature, °C Outlet temperature, °C

60                   30

—                   54

 

product   are   v   10 X 10-6  m2/s,   k   0.25 W/m · K,

 

Th
 

p 1100 kg/m3, and cp 2460 J/kg · K. Evaluate water properties at –       50°C.

(a)    Determine the value of the overall heat transfer coefficient U.

(b)    Determine the mean outlet temperature of the pharmaceutical product when the exchanger oper- ates in the counterflow mode.

(c)    Determine the mean outlet temperature of the pharmaceutical product when the exchanger oper- ates in the parallel-flow mode.

 

Answers

Maurice Tutor
(5)
Status NEW Posted 15 Feb 2018 09:02 PM My Price 8.00

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