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Englisch: flash

Englisch translation: change from a high pressure liquid to a low pressure liquid/gas mixture






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Glossareintrag (aus Frage unten abgeleitet)
Englisch Begriff oder Satz:flash
Englisch Übersetzung:change from a high pressure liquid to a low pressure liquid/gas mixture
Eingetragen von:seaMount
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20:50 Jan 13, 2005Login or register (free) for more options.
Übersetzungen Englisch > Englisch [PRO]
Tech/Engineering - Technik (allgemein) / refrigerating engineering
Englisch Begriff oder Satz: flash
The liquid becomes subcooled and will not flash if exposed to pressure drops in the liquid line.

Could you explain the meaning of "flash" in the above sentence? A client says it can`t be "send a sudden bright light" here. He suggests it means something like "evaporate". Is it possible?
Malgoshah
Polen
Local time: 02:10
change from a high pressure liquid to a low pressure liquid/gas mixture
Erklärung:
As the high pressure liquid refrigerant goes through the TXV, it is exposed to the lower pressure of the evaporator which is created by the compressor.
This exposure causes the refrigerant to start to "flash" or change from a high pressure liquid to a low pressure liquid/gas mixture.
This existing mixture has heavy liquid at the bottom and the lighter vapor at the top.
http://www.outokumpu.com/pages/Page____18588.aspx

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Note added at 12 mins (2005-01-13 21:02:37 GMT)
--------------------------------------------------

so, \'will not flash is \'will not change\' ...
Ausgewählte Antwort von:

seaMount
Niederlande
Local time: 02:10
Hinweis von Fragesteller an den Antwortenden
But thank you for all the answers!!!
4 KudoZ-Punkte wurden für diese Antwort vergeben



Zusammenfassung aller eingereichten Antworten
4 +3flash
Clauwolf
3 +4change from a high pressure liquid to a low pressure liquid/gas mixture
seaMount
3 +3not for grading
Nilgün Bayram
5evaporate (under the pressure drops in the liquid line)
Mark Xiang
4see definition given below
conejo


  

Antworten

6 Min.   Antwortsicherheit: Answerer confidence 4/5Answerer confidence 4/5 Zustimmung (Netto): +3
flash


Erklärung:
:)...will not pass from liquid to gas

Clauwolf
Brasilien
Local time: 22:10
Arbeitsgebiet
Muttersprache: Portugiesisch
PRO-Punkte in Kategorie: 4

Kommentare zu dieser Antwort (und Antworten vom Beantworter der Frage)
Zustimmung Nilgün Bayram
24 Min.
  -> thanks

Zustimmung Will Matter: another way to put it: Will not suddenly and spontaneously go from a liquid state to a gaseous state due to a sudden drop in pressure.
1 Stunde
  -> thanks

Zustimmung -Jorgen-: suddenly or violently
4 Stunden
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7 Min.   Antwortsicherheit: Answerer confidence 4/5Answerer confidence 4/5
see definition given below


Erklärung:
The Flash Point of a chemical is the lowest temperature at which a flame will propagate through the vapour of a combustible material to the liquid surface. It is determined by the vapour pressure of the liquid, since only when a sufficiently high vapour concentration is reached, can it support combustion. It should be noted that the source of ignition need not be an open flame, but could equally be, for example, the surface of a hot plate, or a steam pipe.


    Quelle: http://ptcl.chem.ox.ac.uk/MSDS/glossary/flashpoint.html
conejo
Vereinigte Staaten
Local time: 19:10
Arbeitsgebiet
Muttersprache: Englisch

Kommentare zu dieser Antwort (und Antworten vom Beantworter der Frage)
Neutraler Kommentar Will Matter: This "flash" is not the "flash" of "flash point" but instead, refers to the rapid, spontaneous change from a liquid to a gas (due to decompression) because it happens very, very, very quickly. It's all over in a "flash", you might say :)
1 Stunde
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11 Min.   Antwortsicherheit: Answerer confidence 3/5Answerer confidence 3/5 Zustimmung (Netto): +4
change from a high pressure liquid to a low pressure liquid/gas mixture


Erklärung:
As the high pressure liquid refrigerant goes through the TXV, it is exposed to the lower pressure of the evaporator which is created by the compressor.
This exposure causes the refrigerant to start to "flash" or change from a high pressure liquid to a low pressure liquid/gas mixture.
This existing mixture has heavy liquid at the bottom and the lighter vapor at the top.
http://www.outokumpu.com/pages/Page____18588.aspx

--------------------------------------------------
Note added at 12 mins (2005-01-13 21:02:37 GMT)
--------------------------------------------------

so, \'will not flash is \'will not change\' ...

seaMount
Niederlande
Local time: 02:10
Muttersprache: Niederländisch, Englisch
PRO-Punkte in Kategorie: 4
Hinweis von Fragesteller an den Antwortenden
But thank you for all the answers!!!

Kommentare zu dieser Antwort (und Antworten vom Beantworter der Frage)
Zustimmung Will Matter: Yes. Said essentially the same thing above before I saw your answer. You're correct.
1 Stunde
  -> thank you

Zustimmung -Jorgen-: in the given system (liquid line)
4 Stunden
  -> thank you

Zustimmung Java Cafe
6 Stunden
  -> thank you

Zustimmung juvera
13 Stunden
  -> thank you juvera!
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33 Min.   Antwortsicherheit: Answerer confidence 3/5Answerer confidence 3/5 Zustimmung (Netto): +3
not for grading


Erklärung:
As the pressure in the liquid line drops, progressively more liquid will flash into vapor to cool the remaining liquid to the saturation temperature corresponding to the progressively lower pressure. With an 55.15 kPa (8 psi) pressure drop, the flash gas, by weight, will be 2% with a 37.77oC (100oF) condensing temperature. The vapor bubbles in the liquid line are now very compressed and occupy only 20% of the volume in the liquid line.

However, reduce the condensing temperature to 10.0oC (50oF) and the flashing vapor will occupy 38% of the liquid line volume.

http://www.hysave.co.uk/technical/science_technology.html


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Note added at 42 mins (2005-01-13 21:32:24 GMT)
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http://www.colmaccoil.com/pdf/IOMcondenser.pdf


SUBCOOLER PIPING:Refrigerant liquid leaving the condenser is typically at saturation temperature, and pressure. If the liquid has not beensubcooled before it enters the liquid line, any drop in pressure, or any heat input, will cause the liquid to boil, and “flash gas”is formed. This flash gas will cause an excessive pressure drop in the liquid line, and will greatly reduce the capacity ofthe TX valve, and the system. Adequate subcooling of the liquid will prevent the formation of flash gas.


--------------------------------------------------
Note added at 1 hr 33 mins (2005-01-13 22:23:12 GMT)
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As the heat is removed from the refrigerant, it reaches it’s “saturated temperature” and starts to “flash” (change states), into a high pressure liquid.

The cooler refrigerant in the evaporator tubes, absorb the warm room air. The change of temperature causes the refrigerant to “flash” or “boil”, and changes from a low pressure liquid to a low pressure cold vapor.





Nilgün Bayram
Türkei
Local time: 03:10
Spezialgebiet
Muttersprache: Türkisch

Kommentare zu dieser Antwort (und Antworten vom Beantworter der Frage)
Zustimmung Will Matter
1 Stunde
  -> thanks but I just gave the supporting explanation to Clauwolf's answer.

Zustimmung -Jorgen-
4 Stunden
  -> thanks

Zustimmung Java Cafe
6 Stunden
  -> thanks
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11 Stunden   Antwortsicherheit: Answerer confidence 5/5
evaporate (under the pressure drops in the liquid line)


Erklärung:
The liquid will not evaporate even it is exposed to the pressure drops in the liquid line because it has been subcooled.

Mark Xiang
China
Local time: 09:10
Muttersprache: Chinesisch
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