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Lecture 4

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Lecture 4

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    1. Lecture 4 Heat Exchangers FDT 3305 Pawan S. Takhar Animal and Food Sciences Texas Tech University

    2. Heat exchangers used in Food Processing Industry Concentric tubes Shell and tube type Plate type Ripple plate Mixing vessels with steam jackets Batch type/continuous retorts

    3. Concentric tubes

    4. Counter-Current

    5. Concentric tubes with scrapped surface

    6. Used For Pasteurization of milk and liquid foods Heat recovery from hot food product Heating water and foods Concentric tube

    7. Multistage Pasteurizer

    8. Shell and tube type

    9. Uses of Shell and Tube Type Heat Exchanger Concentration of fruit juices Heating of water Make tube shaped ice

    10. Ice Making Machine

    11. Plate Type

    12. Plate Type Heat Exchanger

    13. Mixing Vessel With Steam Jacket

    14. Continuous Retort

    15. Concentric tubes

    16. Total Resistance

    17. Overall Heat Transfer Coefficient

    18. Co-current

    19. Counter Current

    20. Log mean temp difference in Cocurrent and countercurrent (T1-T2)= dT1-dT2 Ln(dT1/dT2)

    21. Specific Heat Q=M*Cp*(Th1-Th2)

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