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theoretisch trockener Prozeß

English translation: theoretical dry cycle

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19:37 Feb 26, 2001
German to English translations [PRO]
Tech/Engineering - Engineering (general)
German term or phrase: theoretisch trockener Prozeß
context again: thermodynamische Grundlagen, Kfz-Klimaanlagen
"Dieser (Carnot-) Prozeß ist als Kompressionskältemaschine mit einem mechanischen Verdichter nicht zu realisieren. Aus diesem Grund hat man den theoretischen trockenen Prozeß definiert."

Can't find anything on the web about theoretical dry cycles - can anyone help?

If the above context is not adequate, the following paragraphs describe the process:

2.1.2 Theoretisch trockener Prozeß
Bei einer Kompressionskältemaschine führt eine isentrope Verdichtung des Kältemittels zu Flüssigkeitsschäden im Verdichter, weshalb der Beginn der Verdichtung mindestens an die rechte Grenzkurve gelegt werden muß, damit sie im trocken gesättigten Gebiet (überhitzter Dampf) stattfinden kann.

In Abbildung 2.3 ist der Verlauf der isentropen (1-2) zu sehen, durch den sich hier eine Verdichtungsendtemperatur des Kältemittels ergibt, die über der Kondensationstemperatur liegt. Der überhitzte Kältemitteldampf muß erst auf seine Kondensationstemperatur abgekühlt werden (2-2'). [I can't reproduce Figure 2.3 here, but it has the following captions:
1 Ansaugen des gesättigten Dampfes; 1-2 isentrope Verdichtung; 2-2' isobaren Wärmeabfuhr; 2'-3 isotherme Wärmeabfuhr; 3-4 isenthalpe Entspannung; 4-1 isotherme Wärmezufuhr.

Die Expansionsarbeit der Kaltdampfmaschine ist so gering, daß anstelle einer isentropen Expansion, z.B. mit einer Turbine, ein Drosselventil eingesetzt wird, das das Medium isenthalp (3-4), also ohne Austausch von thermischer oder mechanischer Energie mit der Außenumgebung entspannt.

Any help much appreciated!
Beth Kantus
United States
Local time: 20:55
English translation:theoretical dry cycle
Explanation:
hello Beth,

I don't see anything wrong with this translation. From what I can glean in the explanation, and recalling my (now somewhat faded!) notions of thermodynamics, the refrigerant can't be compressed by mecanical means, in the working range it would condense and the liquid would damage the unit, so you have to go to the dry region (overheated steam) to do that. when compressing there, there will be no condensation.
so I'd go with your first guess

HTH

pedro
Selected response from:

pedro_barcelona
Spain
Local time: 02:55
Grading comment
Thanks to all for your help!
4 KudoZ points were awarded for this answer

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Summary of answers provided
na(theoretical) drying process
Davorka Grgic
natheoretical dry process
Alexander Schleber
natheoretical dry cyclepedro_barcelona


  

Answers


4 hrs
theoretical dry cycle


Explanation:
hello Beth,

I don't see anything wrong with this translation. From what I can glean in the explanation, and recalling my (now somewhat faded!) notions of thermodynamics, the refrigerant can't be compressed by mecanical means, in the working range it would condense and the liquid would damage the unit, so you have to go to the dry region (overheated steam) to do that. when compressing there, there will be no condensation.
so I'd go with your first guess

HTH

pedro

pedro_barcelona
Spain
Local time: 02:55
Specializes in field
Native speaker of: Native in SpanishSpanish
PRO pts in category: 4
Grading comment
Thanks to all for your help!
Login to enter a peer comment (or grade)

4 hrs
theoretical dry process


Explanation:
If you search on Google for
http://www.google.com/search?q=theoretical dry process conde...
there are lots of sites with this word combination, including some that seem to come close to what your text is about.


    Internet
Alexander Schleber
Belgium
Local time: 02:55
Works in field
Native speaker of: Native in GermanGerman, Native in EnglishEnglish
PRO pts in category: 26
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5 hrs
(theoretical) drying process


Explanation:
Untitled
... Mechanics and Thermodynamics of Drying: A Summary MJ Lampinen, Valmet Oy ... Modelling
and Calculation of the Drying Process of Capillary Porous Materials S ...
chemeng.p.lodz.pl/idsap/ids80.htm

Good luck.

Davoka


    own knowledge
Davorka Grgic
Local time: 02:55
Specializes in field
Native speaker of: Native in CroatianCroatian, Native in SpanishSpanish
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Changes made by editors
Feb 22, 2013 - Changes made by Steffen Walter:
Field (specific)(none) » Engineering (general)


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