Slag/Other Material Heat Loss Calculator

Detailed Description

This calculator estimates the heat required to heat slag or other combustion byproducts in a furnace. It uses the discharged weight, specific heat, initial and final temperatures, and a correction factor. Assumes majority of slag is silicon and specific heat does not change with temperature. Glass structures in slag may significantly affect results. The calculation is relevant for electrotechnologies and does not account for melting or phase change.

The calculation follows a top-down approach:

1. Total Heat Loss - Calculate sensible heat absorbed by slag/waste material

Relevant formulas are documented below.

Total Heat Loss

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Total heat loss due to slag or other waste material heating.

The heat loss is the sensible heat required to raise the temperature of the waste material from its inlet temperature to the outlet temperature, adjusted by a correction factor.

\begin{equation}\label{eq:slag-other-material-heat-loss} Q = m \cdot c_p \cdot (T_\text{outlet} - T_\text{inlet}) \cdot f_\text{corr}\end{equation}

Symbols

\(Q\)	Heat loss \([\unit{ \btu}]\)
\(m\)	Weight discharged \([\unit{ \pound}]\)
\(c_p\)	Specific heat of material \([\unit{ \btu\per\pound\degreeFahrenheit}]\)
\(T_\text{outlet}\)	Outlet temperature \([\unit{ \degreeFahrenheit}]\)
\(T_\text{inlet}\)	Inlet temperature \([\unit{ \degreeFahrenheit}]\)
\(f_\text{corr}\)	Correction factor \([\unit{ \unitless}]\)

Modules
	Slag/Other Material Heat Loss Formula
	Total heat loss due to slag or other waste material heating.

Files
file	slag_other_material_heat_loss.h

Namespaces
namespace	slag_other_material_heat_loss
	Calculates heat losses from slag and other waste materials in process heating equipment.

Functions
double	slag_other_material_heat_loss::totalHeatLoss (double weight, double inlet_temperature, double outlet_temperature, double specific_heat, double correction_factor)
	Calculates the total heat required for slag or other material losses.

Function Documentation

totalHeatLoss()

double slag_other_material_heat_loss::totalHeatLoss	(	double	weight,
		double	inlet_temperature,
		double	outlet_temperature,
		double	specific_heat,
		double	correction_factor
	)

This function computes the heat loss caused by heating slag or other combustion byproducts within the furnace. Assumes majority of slag is silicon and specific heat does not change with temperature. For glass structures in slag, output may change significantly.

Parameters

[in]	weight	Weight discharged \([\unit{\pound}]\)
[in]	inlet_temperature	Inlet temperature of charged materials \([\unit{\degreeFahrenheit}]\)
[in]	outlet_temperature	Outlet temperature \([\unit{\degreeFahrenheit}]\)
[in]	specific_heat	Specific heat of material \([\unit{\btu\per\pound\degreeFahrenheit}]\)
[in]	correction_factor	Correction factor \([\unit{\unitless}]\)

Returns

Total heat loss \([\unit{\btu}]\)

See also

• Slag/Other Material Heat Loss Formula