| Russian | English |
| отношение длины лопатки к её хорде | blade aspect ratio |
| отношение мощности двигателя к его весу | power-weight ratio of an engine |
| продувка газовой турбины от горючих газов при @её остановке | purge credit (CCGTs are also subject to purge requirements to prevent auto-ignition from possible accumulation of combustible gases in the gas turbine, HRSG and exhaust systems. The purge is required before the unit is restarted. Purge times depend on the boiler volume and air flow through the HRSG, and are typically set to about 15 minutes. This purge time adds to the overall start time. In addition, the steam turbine can restrict the GT loading rate if the steam temperature leaving the HRSG exceeds steam turbine limits. To avoid this, temperature matching using GT holds as the load is increased may be necessary. In order to enable faster startup, CCGT manufacturers have attempted to decouple the gas turbine startup from the HRSG and steam turbine warm-up. Process- and equipment-enhanced start options have been developed that can be used under hot start conditions. A "purge credit" allows the system purge to be completed at shutdown, eliminating the requirement for a redundant purge at next startup. The purge credit can only be used in some HRSGs that have no duct burners and where the GT is fired on natural gas only. CCK) |
| продувка газовой турбины от горючих газов при её остановке | purge credit (CCGTs are also subject to purge requirements to prevent auto-ignition from possible accumulation of combustible gases in the gas turbine, HRSG and exhaust systems. The purge is required before the unit is restarted. Purge times depend on the boiler volume and air flow through the HRSG, and are typically set to about 15 minutes. This purge time adds to the overall start time. In addition, the steam turbine can restrict the GT loading rate if the steam temperature leaving the HRSG exceeds steam turbine limits. To avoid this, temperature matching using GT holds as the load is increased may be necessary. In order to enable faster startup, CCGT manufacturers have attempted to decouple the gas turbine startup from the HRSG and steam turbine warm-up. Process- and equipment-enhanced start options have been developed that can be used under hot start conditions. A "purge credit" allows the system purge to be completed at shutdown, eliminating the requirement for a redundant purge at next startup. The purge credit can only be used in some HRSGs that have no duct burners and where the GT is fired on natural gas only. CCK) |
