Steam Air Heating

Reference data and engineering information about steam air heating for material properties applications.

steamairheating

Overview

Engineering reference data for Steam Air Heating in material science and properties.

$\sigma = \frac{F}{A}$

Force per unit area.

$\varepsilon = \frac{\Delta L}{L_0}$

Change in length per original length.

$\sigma = E \varepsilon$

Stress proportional to strain in elastic region.

$\Delta L = \alpha L_0 \Delta T$

Length change due to temperature.

Symbol	Description	Unit
$\sigma$	Stress	Pa
$\varepsilon$	Strain	—
$E$	Young's modulus	Pa
$\alpha$	Thermal expansion coefficient	1/°C
$\Delta T$	Temperature change	°C

Consider a practical application where 1 m³/s of air is heated from 10 °C to 30 °C using steam that condenses at atmospheric pressure.

Given:

Volumetric air flow rate, $q = 1 \text{ m}^3/\text{s}$
Temperature change, $\Delta t = 30 - 10 = 20 \text{ °C}$
Specific heat of air, $c_p = 1.0 \text{ kJ/kg °C}$
Air density, $\rho = 1.204 \text{ kg/m}^3$
Specific enthalpy of condensation at atmospheric pressure, $h_e \approx 2257 \text{ kJ/kg}$

Calculation: Using the steam consumption formula:

m_s = \frac{q \cdot \Delta t \cdot c_p \cdot \rho}{h_e}

Substitute the given values:

m_s = \frac{1 \cdot 20 \cdot 1.0 \cdot 1.204}{2257} \approx 0.011 \text{ kg/s}

Result: The required steam condensation rate to heat the air under these conditions is approximately 0.011 kg/s.