Combined Cycle - Features

Innovative solutions to reduce the plant environmental impact have been developed to cope with the more and more stringent international regulations such as:
Lower flue gas emissions  upgraded burners have been successfully developed to reduce emissions significantly and guarantee high reliability and availability. 
Noise  particular care is given to the plant acoustic design  providing innovative engineered solutions to noise problems at the lowest disposable costs.
Zero liquid discharge a new ZLD system, CRIOS, has been developed to reduce the needs of fresh water consumption. This system allows a total recovery of the industrial discharge water except the physiological losses of the plant complying with the most stringent environmental normative against water resources pollution.
Architectural solutions to better promote plant acceptance and territorial integration into the land’s social-cultural framework.
Flexibility to meet the requirements of the new free electric market, new power plants should have long lifetime and high flexibility to hold heavy and continuous load cycles with frequent daily start-up and shut-down. 
Another significant feature is the automation/supervision system. Field bus technology has been adopted both for field connections and the electric power interface. The use of field bus technology is particularly interesting as it reduced wired interconnections and improves signal diagnostics, optimising maintenance activities as a result.
Layout optimisation is achieved using a flexible approach to cope standard plant solutions, specifically applicable to power block, with customer and site requirements. Each plant layout is personalized and optimised; the following main criteria will be the base of the plant layout design: safety, operability, maintainability, standardization.
Finally, many skills have been acquired in the Repowering of existing conventional units from ageing conventional coal/oil fired plants to modern and efficient combined cycle with the economic advantages of recovering the existing steam cycle and services main components, such as the steam turbine, the heat condenser and also the auxiliaries and piping still standing.

Plant Performance

Combined Cycle Plant Config. No. & Type GT Net Plant Output [MW] Net Plant Efficiency [%] Net Plant Heat Rate [kJ/kWh] Grid Frequency [Hz] 1AE643-CC1M 1 +1 1 x AE64.3A 112 53.8 6698 50 2AE643-CC1M 2 +1 2 x AE64.3A 224 53.8 6689 50 1AE942-CC1M 1 +1 1 x AE94.2 251 52.1 6904 50 2AE942-CC1M 2 +1 2 x AE94.2 507 52.6 6843 50 1AE943-CC1M 1 +1 1 x AE94.3A 427 58.2 6190 50 2AE943-CC1M 2 +1 2 x AE94.3A 855 58.2 6188 50

Note:
ISO conditions with:

• condenser vacuum = 0.035 bar, except 0.050 bar for AE64.3A
• GT inlet pressure loss = 10 mbar ISO
• GT exhaust pressure loss = 30 / 30 / 35 mbar ISO resp. for AE64.3A / AE94.2 / AE94.3A gas turbines