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# Heating Systems - Steam and Condensate Loads

## Calculating steam and condensate loads in steam heated systems.

The two basic situations common when calculating steam and condensate loads in steam heated systems are

• heat transfer through areas
• heating up materials

### Heat Transfer through Areas

Heat transfer through areas can be expressed as:

Q = U A dt                              (1)

where

Q = quantity of heat transferred trough the area

A = heat transfer area

dt = temperature difference between the steam and the secondary heated fluid

### Heating up Materials

The heat needed to heat up materials can be expressed as:

Q = w cp (t2 - t1)                               (2)

where

w = weight of material

cp = specific heat of the heated material (Check Material Properties to find specific heat for materials)

t1 = initial temperature of the heated material

t2 = final temperature of the heated material

### Heat Rate

The heat rate is the heat transferred per unit of time.

#### Heat Transfer Rate through Areas

The formula for calculating the heat transfer rate for heat transfer through an area can be expressed as:

Q' = Q / (L h) = U A dt /(L h)                                  (3)

where

L = Latent heat of evaporated (condensation) steam (Check Steam Tables to find latent heat, SI or Imperial Units)

h = available time

#### Heat Transfer Rate when heating up Materials

The formula for calculating the heat transfer rate for heating up materials can be expressed as:

Q' = Q / (L h) = w cp (t2 - t1) /(L h)                                     (3b)

## Related Topics

• ### Steam and Condensate

Design of steam & condensate systems with properties, capacities, sizing of pipe lines, system configuration and more.

## Related Documents

• ### Air Heating Systems

Air heating buildings - heat supply vs. air flow and temperature.
• ### Condensate Pipe Lines - Sizing

Flow and pressure loss in condensate return lines - SI Units.
• ### Condensation of Steam - Heat Transfer

Heat transfer when steam condensates.
• ### Heat Emission from Radiators and Heating Panels

The heat emission from a radiator or a heating panel depends on the temperature difference between the radiator and the surrounding air.
• ### Heat Loss from Buildings

Overall heat transfer loss from buildings - transmission, ventilation and infiltration.
• ### Heating Up Applications - Energy Required and Heat Transfer Rates

Energy required to heat up a substance.
• ### Insulated Steam Pipes - Condensate Generated

Heat loss from steam pipes generates condensate which must be drained from the system - imperial units.
• ### Sizing Steam Pipes (lb/h)

Steam is a compressible gas where the capacity of a pipe line depends on the size of the pipe and the steam pressure.
• ### Steam - Flow vs. kW Rating

Calculate steam flow rate vs. kW rating.
• ### Steam Heating Air

Calculate steam heated air systems.
• ### 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.
• ### Transmission Heat Loss through Building Elements

Heat loss through common building elements due to transmission, R-values and U-values - imperial and SI units.

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## Citation

• The Engineering ToolBox (2003). Heating Systems - Steam and Condensate Loads. [online] Available at: https://www.engineeringtoolbox.com/steam-condensate-load-heating-systems-d_276.html [Accessed Day Month Year].

Modify the access date according your visit.

6.3.17

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