Class FireHeatTransferCalculator

java.lang.Object

neqsim.process.util.fire.FireHeatTransferCalculator

public final class FireHeatTransferCalculator
extends Object

Calculates metal wall temperatures for wetted and unwetted zones during fire exposure.

The model treats the vessel wall as a one-dimensional thermal resistance network and solves for wall temperatures using the imposed fire temperature and process fluid temperature. It can be combined with FireHeatLoadCalculator to evaluate transient blowdown cases where external heat input varies over time.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static final class	FireHeatTransferCalculator.SurfaceTemperatureResult	Result container for surface temperature calculations.

Constructor Summary

Constructors

Modifier	Constructor	Description
private	FireHeatTransferCalculator()

Method Summary

Modifier and Type	Method	Description
static FireHeatTransferCalculator.SurfaceTemperatureResult	calculateWallTemperatures(double processFluidTemperatureK, double fireTemperatureK, double wallThicknessM, double thermalConductivityWPerMPerK, double internalFilmCoefficientWPerM2K, double externalFilmCoefficientWPerM2K)	Calculates the heat flux and wall temperatures for a single wall section.

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

FireHeatTransferCalculator

private FireHeatTransferCalculator()

Method Details

calculateWallTemperatures

public static FireHeatTransferCalculator.SurfaceTemperatureResult calculateWallTemperatures(double processFluidTemperatureK,
 double fireTemperatureK,
 double wallThicknessM,
 double thermalConductivityWPerMPerK,
 double internalFilmCoefficientWPerM2K,
 double externalFilmCoefficientWPerM2K)

Calculates the heat flux and wall temperatures for a single wall section.

The solution assumes a series of resistances: external convection/radiation, wall conduction, and internal convection/boiling. It is valid for both wetted and unwetted regions as long as appropriate film coefficients are supplied.

Parameters:

processFluidTemperatureK - Fluid bulk temperature [K]

fireTemperatureK - Incident fire temperature [K]

wallThicknessM - Wall thickness [m]

thermalConductivityWPerMPerK - Metal thermal conductivity [W/(m*K)]

internalFilmCoefficientWPerM2K - Internal film coefficient (boiling/condensation vs. gas) [W/(m2*K)]

externalFilmCoefficientWPerM2K - External film coefficient (radiation/impingement) [W/(m2* K)]

Returns:

Heat flux and wall temperatures for the section