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)
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)
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
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)
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)
Steam & condensate systems- properties, capacities, pipe sizing, systems configuration and more.
Air heating buildings - heat supply vs. air flow and temperature.
Flow and pressure loss in condensate return lines - SI Units.
Heat transfer when steam condensates.
The heat emission from a radiator or a heating panel depends on the temperature difference between the radiator and the surrounding air.
Overall heat transfer loss from buildings - transmission, ventilation and infiltration.
Energy required to heat up a substance.
Heat loss from steam pipes generates condensate which must be drained from the system - imperial units.
Steam is a compressible gas where the capacity of a pipe line depends on the size of the pipe and the steam pressure.
Calculate steam flow rate vs. kW rating.
Calculate steam heated air systems.
Calculating the amount of steam in non-flow batch and continuous flow heating processes.
Steam systems carries heat through pipes from the boiler to consumers as heat exchangers, process equipment etc.
Heat loss through common building elements due to transmission, R-values and U-values - imperial and SI units.