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Electronic Condensate Drains - ZANDER - #8

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Dimensioning electronic condensate drains
When dimensioning condensate drains, it must be taken into account that different quantities of condensa­te need to be drained from the aftercoolers (the condensate is to be drained from the aftercooler itself, a cyc I one separator located downstream, or the pressure vessel), the refrigeration dryers (condensate is usu­ally drained within the dryer itself) and from the filters (residual oil contents or small quantities of condensate).
1. Standard dimensioning
Standard dimensioning is based on the following reference conditions: Ambient (suction) air compressor: 25°C and 60% relative humidity Working pressure: 7 bar
Air discharge temperature aftercooler: 35°C Pressure dew-point refrigeration dryer: 3°C
The volume capacities stated in the technical specifications for the aftercooler, the refrigeration dryer and the filter were calculated with these conditions.
Example:
Compressor(s) with 2,000 m3/h (1 bar(a), 20°C), operated under the above reference conditions
Drain aftercooler: ED3100 (1,800 - 6,000 m3/h) or ED2020 (1,290 - 6,000 m3/h)
Drain refrigeration dryer: ED3030 (840 - 3,600 m3/h) or ED2010 (up to 2,580 m3/h)
Drain filter: ED3004 (720 - 2,400 m3/h) or ED2010 (up to 12,900 m3/h)
2. Extendend dimensioning
This extended method allows the dimensioning to be adapted to climatic conditions and operating pressures that vary from the reference conditions.
or/Aftercooler
Refrigeration dryer
Ambient/Suction conditions
(average summer temperature/relative humidity)
25°C
30°C
35°C
15°C
20°C
25°C
30°C
35°C
40%
50%
60%
70%
80%
40%
50%
60%
70%
80%
4 bar
16.5
3.4
1.5
0.8
0.5
2.6
1.8
1.3
1.0
0.7
6 bar
4.8
2.1
1.1
0.6
0.4
3.6
2.5
1.8
1.4
1.0
8 bar
3.4
1.7
0.9
0.6
0.4
4.7
3.3
2.4
1.8
1.3
10 bar
2.9
1.5
0.9
0.5
0.3
5.7
4.0
2.9
2.2
1.6
12 bar
2.6
1.4
0.8
0.5
0.3
6.8
4.7
3.4
2.6
1.9
14 bar
2.5
1.3
0.8
0.5
0.3
7.8
5.5
4.0
2.9
2.2
16 bar
2.4
1.3
0.8
0.5
0.3
8.9
6.2
4.5
3.3
2.5
25 bar
2.1
1.2
0.7
0.5
0.3
13.5
9.5
6.9
5.1
3.9
50 bar
1.9
1.1
0.7
0.4
0.3
26.6
18.6
13.5
10.0
7.6
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
All correction factors refer to the capacity of the drains on the aftercooler; they have been calculated for an aftercooler discharge temperature
of +10°C above ambient/suction temperature and 3°C pressure dew-point of the refrigeration dryer.
Example:
Compressor(s) with 2,000 m3/h (1 bar(a), 20°C), operated at 10 bar working-pressure. The average day temperature in summer is 30°C with 70% relative humidity.
Correction factor aftercooler: 0.5 (see table) Correction factor refrigeration dryer: 2.2 (see table)
Correction factor filter: always 10
Drain aftercooler: 2,000 m3/h -h 0.5 = 4,000 m3/h (referred to compressor/aftercooler capacity)
Drain refrigeration dryer: 2,000 m3/h -h 2.2 = 910 m3/h (referred to compressor/aftercooler capacity)
Drain filter: 2,000 m3/h -h 10 = 200 m3/h (referred to compressor/aftercooler capacity)
Drain aftercooler: ED3100 (1,800 - 6,000 m3/h) or ED2020 (1,290 - 6,000 m3/h)
Drain refrigeration dryer: ED3030 (420 - 1,800 m3/h) or ED2010 (up to 1,290 m3/h)
Drain filter: ED3004 (up to 240 m3/h) or ED2010 (up to 1,290 m3/h)
We reserve the right to change design and dimensions.
ZANDER Aufbereitungstechnik GmbH
Im Teelbruch 118, D-45219 Essen Postfach 185524, D-45205 Essen Telefon (02054) 934 - 0 Telefax (02054) 934 - 164 Internet: http://www.zander.de
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