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# solution to problem no.11

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### Transcript of "solution to problem no.11"

1. 1. 1. A condenser for a distillation unit must be designed to condense 2000 kg/h of vapor. The effective condensation temperature for the vapor is 132 o C.The heat of condensation for the vapor is 350000 J/kg. Cooling water is available at 15 o C.The cost of cooling water is \$25/1000m 3 .The optimum Heat Transfer Coefficient is 300 W/m 2 K.The cost of the installed heat exchanger is \$400/m 2 and life of the equipment is 10 years. The heat capacity of water is 4184 J/kgK. If the condenser is to operate 7200 hrs/yr, determine the cooling water flow rate in kg/hr and exit temperature for optimum economic conditions.
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