Glossary entry (derived from question below)
English term or phrase:
turndown
Italian translation:
turndown, rapporto di turndown, rapporto tra piena e minima portata, rapporto tra potenza massima e minima
Added to glossary by
Ilde Grimaldi
Oct 10, 2004 12:30
19 yrs ago
12 viewers *
English term
turndown; turndown limit, minimum turndown (di attemperatore/desurriscaldatore)
English to Italian
Tech/Engineering
Energy / Power Generation
desuperheater
grazie, Ilde.
PARAGRAFO DI CONTESTO E UN'OCCORRENZA
A desuperheater is often installed into the plant steam piping at a location downstream of the main steam stop check valve and located before the automatic vent valve. The first steam produced by the once through steam generator is at gas temperature and often cannot be accepted by the steam turbine or process. The steam is usually vented until the desuperheater *minimum turndown* is reached and spray can be initiated to cool the steam temperature to set point. The desuperheater will provide the ability to bring the OTSG steam production into temperature control for steam line warm-up.
ALTRE OCCORRENZE
Logic is required to open the valve only after the *minimum turndown* of the desuperheater has been attained.
Limit feedwater flow to < safety valve capacity and > *minimum turndown limit*.
If flow drops below *minimum turndow*, trip desuperheater block and control valve closed
As the OTSG feedwater is ramped, the steam flow will approach the *minimum turndown capability* of the HP desuperheater.
For this project the desuperheater *turndown* will require a minimum inlet flow of 15656 lb/hr (7100 kg/hr.
The vent is used to discharge steam until the steam temperature reaches set point or until the desuperheater *minimum turndown* has been reached and the spray can commence.
PARAGRAFO DI CONTESTO E UN'OCCORRENZA
A desuperheater is often installed into the plant steam piping at a location downstream of the main steam stop check valve and located before the automatic vent valve. The first steam produced by the once through steam generator is at gas temperature and often cannot be accepted by the steam turbine or process. The steam is usually vented until the desuperheater *minimum turndown* is reached and spray can be initiated to cool the steam temperature to set point. The desuperheater will provide the ability to bring the OTSG steam production into temperature control for steam line warm-up.
ALTRE OCCORRENZE
Logic is required to open the valve only after the *minimum turndown* of the desuperheater has been attained.
Limit feedwater flow to < safety valve capacity and > *minimum turndown limit*.
If flow drops below *minimum turndow*, trip desuperheater block and control valve closed
As the OTSG feedwater is ramped, the steam flow will approach the *minimum turndown capability* of the HP desuperheater.
For this project the desuperheater *turndown* will require a minimum inlet flow of 15656 lb/hr (7100 kg/hr.
The vent is used to discharge steam until the steam temperature reaches set point or until the desuperheater *minimum turndown* has been reached and the spray can commence.
Proposed translations
(Italian)
4 | vedi commenti (solo un piccolo aiuto) |
Elena Ghetti
![]() |
Proposed translations
1 hr
Selected
vedi commenti (solo un piccolo aiuto)
secondo questo gloss turndown e turndown ratio sono praticamente sinonimi:
turndown: The ratio of the maximum to minimum fuel input rates of a burner while maintaining stable combustion.
cache di google:
http://www.google.it/search?q=cache:P3omoc9v7hkJ:committees....
documento:
committees.api.org/standards/CRE/schte/tf/535/docs/api535newdraft4-6-03.doc
altre occorrenze di turndown nello stesso testo:
5.4.1 The turndown of liquid fuel burners is dependent upon the fuel pressure available and the atomizer design.
5.4.2 Typical turndown ratios and fuel pressures are as follows:
5.4.3 The size of the burner is a factor in determining the turndown. Small burners have a lower turndown ratio.
altro glossario
http://www.cleaver-brooks.com/GlossRW.html
turndown è usato in italiano
http://www.google.it/search?q=turndown rapporto&hl=it&lr=&st...
traduzione in francese su proz
http://www.proz.com/?eid_s=31736&float=y&glossary=2132&sp=mt
traduzione in ita sul webster (da prendere con le pinze)
http://www.websters-dictionary-online.org/definition/english...
altro doc interessante
committees.api.org/standards/ CRE/schte/tf/535/docs/api535newdraft4-6-03.doc
traduzione francese sul grand dictionnaire:
http://www.granddictionnaire.com/btml/fra/r_motclef/index102...
turndown: The ratio of the maximum to minimum fuel input rates of a burner while maintaining stable combustion.
cache di google:
http://www.google.it/search?q=cache:P3omoc9v7hkJ:committees....
documento:
committees.api.org/standards/CRE/schte/tf/535/docs/api535newdraft4-6-03.doc
altre occorrenze di turndown nello stesso testo:
5.4.1 The turndown of liquid fuel burners is dependent upon the fuel pressure available and the atomizer design.
5.4.2 Typical turndown ratios and fuel pressures are as follows:
5.4.3 The size of the burner is a factor in determining the turndown. Small burners have a lower turndown ratio.
altro glossario
http://www.cleaver-brooks.com/GlossRW.html
turndown è usato in italiano
http://www.google.it/search?q=turndown rapporto&hl=it&lr=&st...
traduzione in francese su proz
http://www.proz.com/?eid_s=31736&float=y&glossary=2132&sp=mt
traduzione in ita sul webster (da prendere con le pinze)
http://www.websters-dictionary-online.org/definition/english...
altro doc interessante
committees.api.org/standards/ CRE/schte/tf/535/docs/api535newdraft4-6-03.doc
traduzione francese sul grand dictionnaire:
http://www.granddictionnaire.com/btml/fra/r_motclef/index102...
4 KudoZ points awarded for this answer.
Comment: "credo che metterò "rapporto di turndown" e alla prima occorrenza metterò "turndown, vale a dire il rapporto tra piena e minima portata"
per completezza di ricerche
gain turndown limitatore di guadagno [ELETTR] McGrawHill
turn-down ratio = rapporto tra potenza massima e minima EURODICAUTOM
turn-down ratio = rapporto tra piena e minima portata. MAROLLI ING (the ratio between full and minimum output of an oil burner) (comb.)
turn-down range campo di regolazione dell'entità della combustione LOGOS
turn down rapporto di scala LOGOS
www.granddictionnaire (- physics --fluid mechanics) turndown = (français) marge de réglage effective
turn-down abbassamenti repentini del carico (turn-down) documento su Internet
"
Discussion