flash - change from a high pressure liquid to a low pressure liquid/gas mixture ( translation glossary) refrigerating engineering,Technik (allgemein),Technik

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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, 2005

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 KudoZ-Aktivität Fragen: 39 (alle geschlossen) Antworten: 69 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)
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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 +3

flash

Clauwolf

3 +4

change from a high pressure liquid to a low pressure liquid/gas mixture

seaMount

3 +3

not for grading

Nilgün Bayram

evaporate (under the pressure drops in the liquid line)

Mark Xiang

see definition given below

conejo

Antworten

6 Min. Antwortsicherheit:

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

7 Min. Antwortsicherheit:

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

11 Min. Antwortsicherheit:

Zustimmung (Netto): +4

change from a high pressure liquid to a low pressure liquid/gas mixture

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!!!

33 Min. Antwortsicherheit:

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.

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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

11 Stunden Antwortsicherheit:

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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Englisch: flash

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