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# Steam Heating Air

Steam is often used to heat air. Steam condensing rate for air heating equipment can be calculated as

ms = q dt cp ρ / he                               (1)

where

ms = rate of condensation, steam consumption (kg/s)

q = volumetric air flow rate (m3/s)

dt = temperature difference in air flow (oC)

cp = specific heat of air (kJ/kg oC)

ρ = density air (kg/m3)

he = specific enthalpy of evaporating (condensation) steam (kJ/kg)

### Example - Heating Air with Steam

1 m3/s of air is heated from 10oC to 30oC with steam condensing at atmospheric pressure. The steam consumption can be calculated as

ms = (1 m3/s) ((30oC) - (10oC)) (1.0 kJ/kg oC) (1.204 kg/m3) / (2257 kJ/kg)

= 0.011 kg/s

## Related Topics

### • Thermodynamics

Thermodynamics of steam and condensate systems.

## Related Documents

### Air - Heating, Cooling, Mixing, Humidifying or Dehumidifying Processes

Basic air changing state processes - heating, cooling, mixing, humidifying and dehumidifying by adding steam or water - psychometric diagrams and the Mollier charts.

### Air - Humidifying by Adding Steam or Water

Air can be humidified by adding water or steam.

### Air - Humidifying with Steam - Imperial Units

Estimate the amount of steam required (lb/h in 100 cfm) in humid air.

### Air - Humidifying with Steam, SI units

Using steam to humidify air.

### Air and Steam Mixtures

Air in the steam will lower the surface temperatures in heat exchangers - and less heat will be transferred.

### Air Heating Systems

Air heating buildings - heat supply vs. air flow and temperature.

### Condensation of Steam - Heat Transfer

Heat transfer when steam condensates.

### Cooling and Heating Equations

Latent and sensible cooling and heating equations - imperial units.

### Cooling Load - Latent and Sensible Heat

Latent and sensible cooling loads to consider when designing HVAC systems.

### Heating Systems - Steam and Condensate Loads

Calculating steam and condensate loads in steam heated systems.

### Humid Air - Heating

Enthalpy change and temperature rise when heating humid air without adding moisture.

### Properties of Saturated Steam - SI Units

Saturated Steam Table with steam properties as specific volume, density, specific enthalpy and specific entropy.

### Saturated Steam - Properties - Imperial Units

Steam table with sensible, latent and total heat, and specific volume at different gauge pressures and temperatures.

### Saturated Steam - Properties for Pressure in Bar

Saturated Steam Table with properties like boiling point, specific volume, density, specific enthalpy, specific heat and latent heat of vaporization.

### Steam Consumption for some Typical Steam Heated Consumers

Steam consumption rates for typical steam heated consumers in industries like bakeries, breweries, paper factories etc.

### Steam Heating Processes - Load Calculating

Calculating the amount of steam in non-flow batch and continuous flow heating processes.

### Steam Heating Systems - Classifications

Steam systems carries heat through pipes from the boiler to consumers as heat exchangers, process equipment etc.

### Steam Heating Systems - Design

An introduction to the basic design of steam heating systems.

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