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    Reply E-102 Bottoms Feed Heat Exchanger

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    rutuja
    The TEMA AEM type heat exchanger was selected because it has lower fouling factors than the existing exchanger, reducing heat transfer requirements. Both fluids are non-fouling, non-corrosive, and non-toxic, requiring less frequent cleaning. The shell side temperature does not require expansion accommodations, making a less costly design acceptable. The material of construction and design pressures need to be finalized based on pump specifications and client philosophy to avoid additional safety devices.

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    Reply E-102 Bottoms Feed Heat Exchanger

    Uploaded by

    rutuja
    29 views1 page
    The TEMA AEM type heat exchanger was selected because it has lower fouling factors than the existing exchanger, reducing heat transfer requirements. Both fluids are non-fouling, non-corrosive, and non-toxic, requiring less frequent cleaning. The shell side temperature does not require expansion accommodations, making a less costly design acceptable. The material of construction and design pressures need to be finalized based on pump specifications and client philosophy to avoid additional safety devices.

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    The TEMA AEM type heat exchanger was selected because it has lower fouling factors than the existing exchanger, reducing heat transfer requirements. Both fluids are non-fouling, non-corrosive, and non-toxic, requiring less frequent cleaning. The shell side temperature does not require expansion accommodations, making a less costly design acceptable. The material of construction and design pressures need to be finalized based on pump specifications and client philosophy to avoid additional safety devices.

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    © All Rights Reserved
    Download as DOCX, PDF, TXT or read online from Scribd
    Download as docx, pdf, or txt
    29 views1 page

    Reply E-102 Bottoms Feed Heat Exchanger

    Uploaded by

    rutuja
    The TEMA AEM type heat exchanger was selected because it has lower fouling factors than the existing exchanger, reducing heat transfer requirements. Both fluids are non-fouling, non-corrosive, and non-toxic, requiring less frequent cleaning. The shell side temperature does not require expansion accommodations, making a less costly design acceptable. The material of construction and design pressures need to be finalized based on pump specifications and client philosophy to avoid additional safety devices.

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    SUBJECT – E-102 (Bottoms – Feed Pre-heater) Reply

    1. The TEMA “AEM” type of the heat exchanger was selected because,
     The fouling factors of both side fluids are much lower (0.00023 hr-m2-C/kcal)
    compare with existing exchanger both side fluids fouling factors (0.00040 hr-
    m2-C/kcal). This means heat transfer are requirement is reduced.
     Both shell side and tube side fluids are non-fouling, non-corrosive and non-
    toxic. This means frequent cleaning of heat exchanger is not required. If
    required during annual maintenance the shell side can be cleaned with
    chemical cleaning methods. Online cleaning of both sides are possible.
     The maximum temperature is on shell side and is around 1400C. As shell side
    fluid temperatures do not require to absorb thermal expansion between the
    outer shell and tube bundle pull-through floating head BET Design is not
    required. Also BET design is much costly.
    2. The “Carbon Steel” material of construction of both shell and tube side is acceptable
    unless client wants specific material of construction.
    3. The design pressures on both shell and tube side fluids have to be finalised based on
    respective pump shut off pressures (from performance curves of existing pumps).
    Also once selected the suitable piping material class (specification) has to be decided
    on both sides (exchanger trims).
    4. If the design pressures are selected to maintain 10/13th Rule we can avoid the
    requirement of Pressure Safety Valves on Low pressure side.
    5. The design temperatures of both sides shall be maximum operating temperature +
    280C. Or client project philosophy to be followed.
    6. As an alternate design conditions, exchanger shall be designed (subjected to) for
    steam out design at 3 kg/cm2 (g) / Full Vacuum @ 1750C.
    7. Design Mean Design Metal Temperature (MDMT) to be defined by client.
    8. Who is going to provide the nozzle schedule and fabrication drawing for the
    exchanger?

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