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    THERMAL RATING OF HEAT EXCHANGERS
heat exchanger tube thermal rating

    PROJECT DATA (Optional)

    Project
    Remarks
    Your ref Client
    Identification           Client's ref                  

    CALCULATION INPUT (Required)

    Duty
    Required Heat Transfer Duty
     
    Fluids
    Hot Fluid Cold Fluid
    Medium   
    Condition Liquid    Liquid
    Gas or Vapour    Gas or Vapour
    Volumetric Flowrate   
    Density   
    Inlet Temperature   
    Specific Heat Cp   
    Viscosity at inlet temp cP [=mPa.s]   
    Second temperature (optional, see note) unit as above   
    Viscosity at second temperature(optional) cP [=mPa.s]   
    Thermal Conductivity   
    Fouling Factor    Typical Fouling values
    Max. allowable Pressure Drop   
     
    Exchanger Data
    Number of Shells in Series   
    Type of Heat Exchanger TEMA designations
     
    Shell and Tube Side Allocation of fluids: Information and Tips for choice of fluid on Shell or Tube Side
    Shell Side Tube Side
    Fluid Hot Fluid   Hot Fluid
    Cold Fluid    Cold Fluid
    Number of Passes   
     
    Dimensional Data
     
    Shell
    Diameter
    Wall Thickness
     
    Tubes
    Number of Tubes Tube Count for Pattern and OTL (courtesy Red Bag)
    Pattern Triangular Square Rotated square      Information Tube Patterns
    Pitch Recommended Pitch
    Diameter
    Tube Length for U-tube use straight length
    Material Thermal Conductivity
    Bundle Diameter
    Pairs of sealing strips Typically one pair per 5 or 6 tuberows Sealing strips drawing
     
    Baffles
    Number of Baffles
    Baffle Thickness
    Baffle cut % Baffle Information  (Normal value between 20 and 25%)
    Shell to Baffle Clearance Difference in diameter
    (internal Shell - external Baffle)
    (normal value 1.6 to 5 mm)
    Tube to Baffle Clearance Difference in diameter
    (internal Baffle - external Tube)
    (normal value 0.8 mm)
     
    Nozzle Data
    Shell Side Tube Side
    Inlet         Nozzle Size
    Schedule of Nozzle schedules 5S, 10S, 40S and 80S are stainless steel
    Otherwise material is carbon steel
     
    outlet Nozzle Size
    Schedule of Nozzle schedules 5S, 10S, 40S and 80S are stainless steel
    Otherwise material is carbon steel

    Note:
    The approximate outlet temperatures and associated viscosities are used only to estimate the viscosities at the tube wall temperature, which has a very small influence on the heat transfer coefficient. If in doubt input the same viscosity as the inlet.
    The actual outlet temperatures are calculated using the duty and fluid properties.


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