Jul 22, 2015 20:02
8 yrs ago
3 viewers *
English term
On-line and Off-line water washing method
English to Croatian
Tech/Engineering
Engineering: Industrial
VII. ON-LINE WATER WASHING METHOD
The intent of on-line washing is to extend the period between off-line washes through frequent washings of short duration. When the analysis, evaluations and visual inspections as described above indicate that the compressor is heavily fouled, or it is suspected of being heavily fouled, an off-line wash should be performed.
GE does not recommend the use of detergents during on-line washing because there is a concern for leaving detergent residue on the latter stages of the compressor. The detergent effectiveness during an on-line wash is limited since there is no soak period as with the off-line wash. As the on-line washing practice has been found to be most effective when carried out daily, the specification on the liquid must be more restrictive for on-line washing than off-line washing.
It is noted that the on-line wash may result in unacceptable emission output levels during the washing cycle.
Adding water for wash will increase the compressor pressure ratio and thus reduce the operability margin. Under normal circumstances, there is ample operability margin to allow for washing and steam or water injection for NOx control or power augmentation.
The intent of on-line washing is to extend the period between off-line washes through frequent washings of short duration. When the analysis, evaluations and visual inspections as described above indicate that the compressor is heavily fouled, or it is suspected of being heavily fouled, an off-line wash should be performed.
GE does not recommend the use of detergents during on-line washing because there is a concern for leaving detergent residue on the latter stages of the compressor. The detergent effectiveness during an on-line wash is limited since there is no soak period as with the off-line wash. As the on-line washing practice has been found to be most effective when carried out daily, the specification on the liquid must be more restrictive for on-line washing than off-line washing.
It is noted that the on-line wash may result in unacceptable emission output levels during the washing cycle.
Adding water for wash will increase the compressor pressure ratio and thus reduce the operability margin. Under normal circumstances, there is ample operability margin to allow for washing and steam or water injection for NOx control or power augmentation.
Proposed translations
(Croatian)
| 3 | (metode) ispiranje tijekom rada i tijelom stanke |
V&E-Team
|
Proposed translations
3 days 18 hrs
Selected
(metode) ispiranje tijekom rada i tijelom stanke
doslovno: (metode) ispiranja u uključenom i isključenom režimu
ili 'on-line' i 'off-line' ispiranje - ako vam je tako prihvatljivo
Objašnjenje za On-line washing na engl:
http://www.cospp.com/articles/print/volume-9/issue-2/feature...
‘On-line washing just extends the interval between the times off-line washing is done,’ says Brun. On-line washing is the answer to keeping the turbine running 24/7, without allowing the performance to degrade excessively. With on-line washing, an array of nozzles in the inlet area injects water droplets into the compressor while the turbine is running. ‘On-line washing should be performed frequently to avoid deposit build-up; for example daily or weekly,’ says Meher-Homji. ‘If the interval between on-line washing is too long, the benefits will not be seen. Frequent on-line washing also avoids sending ‘slugs’ of foulant into the combustion section.’
OFF-line washing:
Off-line, or crank washing, requires shutting down the turbine and letting it cool. Once the temperature has dropped sufficiently, water is again sprayed into the turbine inlet while the turbine slowly rotates. ‘Off-line washing is still the best way to completely clean the compressor and give maximum power recovery,’ says Meher-Homji. ‘Therefore, operators should perform off-line crank washing whenever convenient, during all scheduled outages.’
Iz ovih objašnjenja se vidi da se radi o ispiranju kompresora tijekom rada i tijelom prekida rada (tijekom stanke).
U ovom dokumentu se koriste izrazi On Line i Off Line bez crtice.
http://www.ewp.rpi.edu/hartford/~roberk/IS_Climate/Papers/Ga...
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Note added at 3 days18 hrs (2015-07-26 14:31:55 GMT)
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http://www.proz.com/?sp=gloss/term&id=14442364
ili 'on-line' i 'off-line' ispiranje - ako vam je tako prihvatljivo
Objašnjenje za On-line washing na engl:
http://www.cospp.com/articles/print/volume-9/issue-2/feature...
‘On-line washing just extends the interval between the times off-line washing is done,’ says Brun. On-line washing is the answer to keeping the turbine running 24/7, without allowing the performance to degrade excessively. With on-line washing, an array of nozzles in the inlet area injects water droplets into the compressor while the turbine is running. ‘On-line washing should be performed frequently to avoid deposit build-up; for example daily or weekly,’ says Meher-Homji. ‘If the interval between on-line washing is too long, the benefits will not be seen. Frequent on-line washing also avoids sending ‘slugs’ of foulant into the combustion section.’
OFF-line washing:
Off-line, or crank washing, requires shutting down the turbine and letting it cool. Once the temperature has dropped sufficiently, water is again sprayed into the turbine inlet while the turbine slowly rotates. ‘Off-line washing is still the best way to completely clean the compressor and give maximum power recovery,’ says Meher-Homji. ‘Therefore, operators should perform off-line crank washing whenever convenient, during all scheduled outages.’
Iz ovih objašnjenja se vidi da se radi o ispiranju kompresora tijekom rada i tijelom prekida rada (tijekom stanke).
U ovom dokumentu se koriste izrazi On Line i Off Line bez crtice.
http://www.ewp.rpi.edu/hartford/~roberk/IS_Climate/Papers/Ga...
--------------------------------------------------
Note added at 3 days18 hrs (2015-07-26 14:31:55 GMT)
--------------------------------------------------
http://www.proz.com/?sp=gloss/term&id=14442364
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