Glossary entry (derived from question below)
German term or phrase:
Absaugglocken
English translation:
suction hood, suction bell
Added to glossary by
Jörgen Slet
Oct 25, 2006 14:07
17 yrs ago
2 viewers *
German term
Absaugglocken
German to English
Tech/Engineering
Environment & Ecology
measurement of diffuse emissions
This again comes from the VDI guideline 4285 (Determination of diffusive emissions by measurements). and has been translated as "suction bells". I am translating from the English translation, and unfortunately I often cannot make much sense out of the translation.
Does the German original also mention suction, in the title and text ?
If it does, some of the text just doesn't make sense.
--- Here is the German source text ---
6.2 Direkte Methoden zur Emissionsermittlung
6.2.1 Vorermittlung mit
Absaugglocken
Diese einfache Methode wird zu Voruntersuchungen
der Emissionssituation von Deponien angewendet
und häufig auch als FID-Begehung bezeichnet. Insbesondere
so genannte hot spots, das heißt Bereiche
einer Deponie mit starkem Gasaustritt, können so ermittelt
werden. Im Prinzip stellt die Methode eine
stark verkleinerte Sonderform der Windtunnelmessung
dar. Gemessen wird die Zusammensetzung des
Gases unter einer Absaugglocke. Zu berücksichtigen
ist grundsätzlich auch die zusätzlich angesaugte
Falschluft. In der Praxis wird aber häufig vorausgesetzt,
dass die Konzentration der zu bestimmenden
Komponente (z.B. CH4) in der Falschluft vernachlässigt
werden kann, so dass sich damit der Messaufwand
erheblich vereinfacht.
Gilt diese Vorraussetzung nicht, so muss zur Quantifizierung
des Falschluftanteils neben der gesuchten
Komponente auch die Konzentration einer zweiten in
der Falschluft, aber nicht im zu untersuchenden Gasstrom
vorkommenden Komponente gemessen werden.
Das Messprinzip einer FID-Messung zur Ermittlung
der CH4-Emissionen aus Deponien ist in Bild 2 dargestellt.
--- Here is the English translation ---
6.2 Direct methods for determining emissions
6.2.1 Pre-determination with the help of
suction bells
This simple method is used for preliminary studies of
the emission situation of landfills and is often termed
FID field measurement. In particular what is termed
hot spots, i.e. landfill areas with a high level of gas
emission, can be determined in this way. In principle,
the method represents a strongly reduced special kind
of wind tunnel measurement. The composition of the
gas is measured under a suction bell. Basically, the
additionally sucked infiltrated air shall also be taken
into account. In practice, however, it is often assumed
that the concentration of the component to be determined
(e.g. CH4) is negligible in the infiltrated air, so
that the measurement effort is considerably reduced.
If this assumption is wrong, the concentration of a
second component that occurs in the infiltrated air,
but not in the gas flow to be analyzed, shall be measured
in addition to the component in question, in order
to be able to quantify the portion of the infiltrated
air.
Figure 2 shows the principle of a FID measurement
for the determination of CH4 emissions from landfills.
--- Here is the drawing ---
http://www.valent.ee/suctioncup.gif
Does the German original also mention suction, in the title and text ?
If it does, some of the text just doesn't make sense.
--- Here is the German source text ---
6.2 Direkte Methoden zur Emissionsermittlung
6.2.1 Vorermittlung mit
Absaugglocken
Diese einfache Methode wird zu Voruntersuchungen
der Emissionssituation von Deponien angewendet
und häufig auch als FID-Begehung bezeichnet. Insbesondere
so genannte hot spots, das heißt Bereiche
einer Deponie mit starkem Gasaustritt, können so ermittelt
werden. Im Prinzip stellt die Methode eine
stark verkleinerte Sonderform der Windtunnelmessung
dar. Gemessen wird die Zusammensetzung des
Gases unter einer Absaugglocke. Zu berücksichtigen
ist grundsätzlich auch die zusätzlich angesaugte
Falschluft. In der Praxis wird aber häufig vorausgesetzt,
dass die Konzentration der zu bestimmenden
Komponente (z.B. CH4) in der Falschluft vernachlässigt
werden kann, so dass sich damit der Messaufwand
erheblich vereinfacht.
Gilt diese Vorraussetzung nicht, so muss zur Quantifizierung
des Falschluftanteils neben der gesuchten
Komponente auch die Konzentration einer zweiten in
der Falschluft, aber nicht im zu untersuchenden Gasstrom
vorkommenden Komponente gemessen werden.
Das Messprinzip einer FID-Messung zur Ermittlung
der CH4-Emissionen aus Deponien ist in Bild 2 dargestellt.
--- Here is the English translation ---
6.2 Direct methods for determining emissions
6.2.1 Pre-determination with the help of
suction bells
This simple method is used for preliminary studies of
the emission situation of landfills and is often termed
FID field measurement. In particular what is termed
hot spots, i.e. landfill areas with a high level of gas
emission, can be determined in this way. In principle,
the method represents a strongly reduced special kind
of wind tunnel measurement. The composition of the
gas is measured under a suction bell. Basically, the
additionally sucked infiltrated air shall also be taken
into account. In practice, however, it is often assumed
that the concentration of the component to be determined
(e.g. CH4) is negligible in the infiltrated air, so
that the measurement effort is considerably reduced.
If this assumption is wrong, the concentration of a
second component that occurs in the infiltrated air,
but not in the gas flow to be analyzed, shall be measured
in addition to the component in question, in order
to be able to quantify the portion of the infiltrated
air.
Figure 2 shows the principle of a FID measurement
for the determination of CH4 emissions from landfills.
--- Here is the drawing ---
http://www.valent.ee/suctioncup.gif
Proposed translations
(English)
4 +1 | suction hood, suction bell | David Moore (X) |
4 +1 | extraction domes / hoods | Wulf-Dieter Krüger |
4 | vacuum hood | Darin Fitzpatrick |
4 | suction cups | Johannes Gleim |
Proposed translations
+1
1 hr
German term (edited):
Absaugglocke
Selected
suction hood, suction bell
While I see nothing basically wrong with "suction bell", I think I would use "suction hood" here; I doubt that the ENS would use "suction cap", as this is generally understood to be the sort of flexible rubber "cup" which sticks by suction on smooth surfaces and can support things like ashtrays in cars, tooth-mugs in the bathroom, brush-holders in the kitchen and a million-and-one other things besides.
You have my sympathy; some of the English is quaint, to say the least. To me, "strongly reduced special kind of" should read "much scaled-down type of", and I say "analysis" is preferable to "measurement" - because you don't "measure" a "composition" when you mean "find out what's in it".
You have my sympathy; some of the English is quaint, to say the least. To me, "strongly reduced special kind of" should read "much scaled-down type of", and I say "analysis" is preferable to "measurement" - because you don't "measure" a "composition" when you mean "find out what's in it".
4 KudoZ points awarded for this answer.
Comment: "Thanks, sorry I left this open for so long, the text is a mess and besides, most answers are reasonable."
1 hr
vacuum hood
or vacuum cover
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Note added at 2 hrs (2006-10-25 16:16:27 GMT)
--------------------------------------------------
As David points out, the English is not up to standard. Air is "drawn into" the hood (or bell or cover) rather than "sucked into" it. (Also agree with David's notes, but that's not why you called.)
Suction is definitely involved, based on the German description.
--------------------------------------------------
Note added at 2 hrs (2006-10-25 16:16:27 GMT)
--------------------------------------------------
As David points out, the English is not up to standard. Air is "drawn into" the hood (or bell or cover) rather than "sucked into" it. (Also agree with David's notes, but that's not why you called.)
Suction is definitely involved, based on the German description.
+1
2 hrs
extraction domes / hoods
I take it that theses are bell-like devices sitting on the surface of landfills 'collecting' permeating gases from the landfill from where they might be pumped into containers.
however I cannot imagine that there is any pump for suction
--------------------------------------------------
Note added at 2 hrs (2006-10-25 16:43:08 GMT)
--------------------------------------------------
domes is an error I just realized so one should stick with
extraction hoods
extracion bells
gas collecting bells
however I cannot imagine that there is any pump for suction
--------------------------------------------------
Note added at 2 hrs (2006-10-25 16:43:08 GMT)
--------------------------------------------------
domes is an error I just realized so one should stick with
extraction hoods
extracion bells
gas collecting bells
23 mins
suction cups
Why not suction cup (as in the picture title)?
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Note added at 3 Stunden (2006-10-25 17:59:50 GMT)
--------------------------------------------------
I do not see this contradiction, because the air sucked is not released into the environment, but olny investigated.
--------------------------------------------------
Note added at 4 Stunden (2006-10-25 18:23:09 GMT)
--------------------------------------------------
Suction cup = Saugnapf, Sauger.
Suction hood = Saughutze may also be possible (The German term "Hutze" is very seldom)
Or you may use extractor.
--------------------------------------------------
Note added at 4 Stunden (2006-10-25 18:25:28 GMT)
--------------------------------------------------
To asker: The emissons are not increased as the extracted air is collected and investigated and not released to the environment.
--------------------------------------------------
Note added at 3 Stunden (2006-10-25 17:59:50 GMT)
--------------------------------------------------
I do not see this contradiction, because the air sucked is not released into the environment, but olny investigated.
--------------------------------------------------
Note added at 4 Stunden (2006-10-25 18:23:09 GMT)
--------------------------------------------------
Suction cup = Saugnapf, Sauger.
Suction hood = Saughutze may also be possible (The German term "Hutze" is very seldom)
Or you may use extractor.
--------------------------------------------------
Note added at 4 Stunden (2006-10-25 18:25:28 GMT)
--------------------------------------------------
To asker: The emissons are not increased as the extracted air is collected and investigated and not released to the environment.
Note from asker:
If suction is used, the emissions are heavily increased, and the following words in the text are not true: "In principle, the method represents a strongly reduced special kind of wind tunnel measurement." |
If there is vacuum under the dome, it "sucks" gaseous emissions from the surface being measured. Thus we get a very high measurement result that is weakly related to the normal process. Since this is pre-determination, it is not completely unreasonable. But there is no similarity to wind tunnel measurement where air is *blown* under the hood. |
Peer comment(s):
neutral |
Cetacea
: Isn't suction cup something pretty small, as in "Saugnapf"?
3 hrs
|
It may be
|
Discussion
--- German ---
6.2.2 Haubenmessung
Im Gegensatz zur Saugglocke ist das Haubenvolumen
so groß gewählt, dass nicht von einer aktiven
Durchströmung des Haubenvolumens ausgegangen
wird.
--- English ---
6.2.2 Hood measurement
In contrast to the suction bell, the selected hood volume
is so large that it is not assumed to be actively
flown through.