13
4
Basic planning
Condair GS 80 OC
C
G20
1. Required maximum steam capacity
2. Required combustion gas
All the data necessary for the selection and layout of a Condair GS...OC humidifier system are provided
in the following chapters.
4.1
Selecting the unit
The selection of the unit is reflected in the type description:
4.1.1 Calculating the maximum required steam capacity
The maximum required steam capacity is calculated from the following formulas:
V • ρ
m
D
=
• (x2 - x1)
1000
or
V
m
D
=
• (x2 - x1)
1000 • ε
m
D
: maximum steam demand in
kg/h
V
: volume of supply air portion per hour in
m
3
/h
(for indirect room humidification) or room volume to
be humidified per hour in
m
3
/h
(for direct room humidification)
ρ
: specific gravity of air in
kg/m
3
ε
: specific volume of air in
m
3
/kg
x
2
: desired absolute room air humidity in
g/kg
x
1
: minimum absolute supply air humidity in
g/kg
The values for
ρ, ε, x2
and
x1
can be gathered from the
h,x-diagram
or the
Carrier-Diagram
for moist
air respectively.
For a rough estimate of the calculated steam capacity, the following table can be used. The values
listed in the table are based on a desired room air temperature of 20°C and a desired relative room air
humidity of 45 %rh.
Note: To roughly estimate the calculated maximum steam capacity for larger supply air portions or room
volumes, the values listed in the table can be projected accordingly.
Summary of Contents for GS 120 OC
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Page 69: ...69 Notes...
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Page 71: ...Condair Ltd Printed in Switzerland Technical modifications reserved...
