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ME414 Spring 2006 Design Project 2 Heat Exchanger

Introduction. IntroductionProject DefinitionDesign Optimization GoalsFirst Design PassSecond Design PassOther FactorsDesign Results. Project Definition. During the make of a liquid chemical product, its temperature needs to be reduced by 10 degrees Celsius. Mass flow rate is 80,000 kg/hrFlu

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ME414 Spring 2006 Design Project 2 Heat Exchanger

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    1. ME414 Spring 2006 Design Project 2 Heat Exchanger Ugo Anyoarah Osinanna Okonkwo Vinay Prisad Daniel Reed

    2. Introduction Introduction Project Definition Design Optimization Goals First Design Pass Second Design Pass Other Factors Design Results

    3. Project Definition During the make of a liquid chemical product, its temperature needs to be reduced by 10 degrees Celsius. Mass flow rate is 80,000 kg/hr Fluid enters the heat exchanger at 35 C and should leave at 25 C Material properties of this chemical product can be approximated as water Cooling of the chemical product will be achieved by using treated city water City water is available at 20 C Mass flow rate is adjustable and one of the design parameters to be selected Exit temperature of city water from the heat exchanger is a function of the selected mass flow rate

    4. Design Optimization Goals Must cool the chemical from 35 C to 25 C Heat exchanger length can not exceed 7 m Heat exchanger shell diameter can not exceed 2 m Minimize heat exchanger shell and tube weight hence the cost Minimize heat exchanger pressure drop

    5. First Design Pass Matlab Variables 4 variables Tube_OD (6.350 – 25.4)e-3 meters Shell_ID (.8 – 2) meters Tube_Len (4 – 7) meters N_tube (40 – 100) 7 levels Gives 7^4 = 2401 runs

    6. First Design Pass Matlab Variables Tube and Shell Material set to Aluminum Consistent expansion between shell & tubes. Maximum heat transfer Corrosion Resistance (chemical similar to H20) Tube pass set to two (2) Most space efficient Baffle Space set to 0.1048 m Baffle Cut set to 0.3750 m City water flow rate set to 38.8889 Kg/Sec

    7. First Design Pass Matlab Results Weight: 2069.17 – 22415.9 DP Shell: 335149 – 6364756 DP Tube: 17701.66 – 4.26e11 Q Calc: 107043.7 – 919867.5 2401 runs = AAARRRGGGHHH!!!!!

    8. First Design Pass - MiniTab Results

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