Fire heater natural draft simulator

(Designed to instruct engineers and operators)

This page allows the visualization of all the result variables from the calculation of a particular input data set.

At the end of this page there is a graphic section with possibilities to define a variation range for a specific variable and show the behavior of the process in such range.
(It is recommended to use this section only as a reference to check the robustness of the algorithm, since certain points may not be applicable to reality due to physical restrictions that the simulator does not contemplate)


Process conditions

Enable fields

Input flow BPD ~ lb/hr

Spec. Grav. SG @ 60°F

Heat absorption ("duty"): 71.53 MMBtu/hr

Inlet temp Tin °F ~ °C

Outlet temp Tout °F ~ °C

Heat capacity Cpin Btu/lb-°F

Heat capacity Cpout Btu/lb-°F

Viscosity - μin cp

Viscosity - μout cp

Therm. cond. kin Btu/h.ft.°F

Therm. cond kout Btu/h.ft.°F

Heat Loss %

Fouling factors per section

RADIANT

Rfi hr.ft².°F/Btu

SHIELD

Rfi hr.ft².°F/Btu

Rfo hr.ft².°F/Btu

CONVECTIVE

Rfi hr.ft².°F/Btu

Rfo hr.ft².°F/Btu

Air

Ambient Temp Ta °F ~ °C

Relative Humidity RH %

Atmospheric Pressure atm

Air Excess %

Flue Gas
(For healthy combustion with gas fuels, 3% Oxygen in flue gas on dry basis is targeted.)

Flue gas O2 Excess %
[If this value is set, it overwrites air excess ]

Oxygen sampling basis

Fuel Gas [edit]

Temp Tf °F ~ °C

Fuel gas Specified as

Composition

Total 0 %

Methane

CH4

Ethane

C2H6

Propane

C3H8

n-Butane

C4H10

i-Butane

C4H10

Ethylene

C2H4

Propylene

C3H6

Carbon Monox.

CO

Hydrogen

H2

Oxygen

O2

Nitrogen

N2

Carbon Diox.

CO2

SI

EN

UNIT SYSTEM

Graph [variables]

Variable to modify

Variation range ~

Number of runs ~