WinHeat 4.5

Fired Heater Design and Rating Software

Direct Fired Heaters are a critical component of many refining and petrochemical processes. They must be must be configured correctly to ensure efficiency and optimum plant performance.

WinHeat4.5, the latest version of the WinHeat suite of software, rates and designs direct-fired heaters, giving more control to the engineer or designer. It also rates convections, unfired and supplementary fired recovery units, HRSG's, and other similar equipment with process on tube side.

Heater Configurations

Description Firing
Horizontal Tube, Cabin Type Single sided
Vertical Tube, Cylindrical Single Sided
Convection Section Only Supplementary/Auxiliary
Helical Tube, Cylindrical Single Sided
Vertical Wicket Tube Single Sided
Horizontal Tube, Twin Box Single Sided
Vertical Tube, Box Mixed
Vertical Tube, Cylindrical Double Sided
Vertical Tube, Box Double Sided
Wicket Tube Double Sided
Horizontal Tube Double Sided
Vertical Tube, Box Double Sided
CO Furnace/Boiler Auxiliary Combustor
NOTE: Configurations not exactly fitting these criteria may be rated by simply inputting actual dimensions and tube counts, etc.


Some of the features available

  • Allows up to six tube sizes/materials or segments in radiant
  • Allows up to ten tube sizes/materials or segments in convection
  • Allows up to six process streams in convection
  • Allows introduction of an external flue gas source to convection section
  • Takes into account preheated combustion air and calculates system efficiency
  • Rates convection with bare, helical finned, or studded tubes
  • Built-in thermal data for most popular materials, and will accept user input
  • Selection of inside rate calculation, or may be a user input
  • Allows user to set specific thermal rating factors for modeling to an exact fit
  • Calculates tube wall temperatures per API or with user-specified factors
  • Calculates exhaust gas dew point if sulfur present
  • Sizes stacks and checks draft without running a standalone program
  • Uses insulation data to select materials and calculate heat loss and wall temperatures
  • Supports English, Metric, and SI Metric units

Preview WinHeat Program Onscreen

            Step 1, Select Heater arrangement Type to be rated                          Step 2, Select Units for input data(may be changed anytime)

Odoo • Image and Text
Odoo • Image and Text

           Step 3, Select Process Input, then input process data                                    Step 4, Select Shield Input, then input shield data

Odoo • Image and Text
Odoo • Image and Text

             Step 5, Select Radiant Input, then input radiant data                              Step 6, Select Convection Input, then input convection data

Odoo • Image and Text
Odoo • Image and Text

              Step 7, Select Desired Fuel Input, then input fuel data                  Step 8, Select Combustion Input, then set combustion conditions

Odoo • Image and Text
Odoo • Image and Text

Step 9, If there is a secondary gas stream, Select Secondary                         Step 10, Select Combustion Air Input, then input conditions
              Gas Input then input conditions

Odoo • Image and Text
Odoo • Image and Text

      Step 11, If there are inlet or outlet terminal headers, Select Terminal            Step 12, SAVE YOUR WORK, Select Save from file menu
                     Header Input and input

Odoo • Image and Text
Odoo • Image and Text

             Step 13, Select Calculation Type and run calculations                              Step 14, Select Review And Type and review on screen

Odoo • Image and Text
Odoo • Image and Text

Additional notes on Fired Heater Thermal Design

  •  If results of thermal calculations are acceptable, then User should continue, if not, changes should be made, resave file, and rerun 
     calculations.

  • Two available input screens were not reviewed above, they are:

    • Reference Data: This form is used to input User project information for identity of data.

    • Thermal Design Factors: This form is used to set or tweak constants used or calculated in the thermal correlations. They should only be manipulated by a heater designer to account for deficiencies such as non-homogeneous radiant gas temperatures, or damaged or fouled fins in the convection section, etc.

  • Please continue to review remaining calculations available.

  • View or Print full sample Heater Thermal Printout.

  Step 15, Select Size Stack from Calculations, then input                       Step 16, Select Insulation, then step through each heater -
                  criteria and size stack                                                                                    section setting insulation

Odoo • Image and Text
Odoo • Image and Text

   Step 17, Select Check Tube Wall from Calculations, then                      Step 18, Select Radiant Tube Wall Temperature from Calculations,                       select segment to calculate per API RP530                                              then set criteria and check as required

Odoo • Image and Text
Odoo • Image and Text