Fossil Energies
Combined-cycle plants
Combined-cycle plants produce electric power from natural gas combustion. This is done by superim posing two different thermal cycles: Bryton cycle, associated to direct combustion in a gas turbine, and Rankine cycle, associated to water vapor. This way it is possible to take advantage of the hot gasses that escape the gas turbine cycle to provide the power needed to operate the related vapor cycle.
Electricity is generated in two different thermal machines (gas and vapor turbines) from just one primary fuel (natural gas). This cycle superposition allows combined-cycle plants to have a higher energetic efficiency thanks t
Since the mid 90s, combined-cycle plants have experienced a significant grow in the world’s energetic mix du
e to their competitive advantages over other fossil technologies, some of them being investment costs for each installed power unit, high efficiency and low emissions. Moreover, their power is dense according to the occupied ground and makes the plant more flexible and easier to manage, adapting it to the market’s necessities.
Combined-cycle plants are still going to play a decisive role in the international energetic mix. In emerging countries they are replacing obsolete fossil generation technologies, less efficient and not very environmental friendly, to guarantee a safe supply. They act as renewable energy back-ups and secondary-tertiary regulation tools at the system operator’s service, changing their original concept of base charge operation.
The services provided by Deenma in this area are those needed to analyze the viability and monitor both the project and the EPC integral development. This includes technical support, construction monitoring and tests with assistance during operation.
Peaker plants
In the last few years the electric sector has undergone a noticeable penetration of renewable energies in the electric systems generation mix. These generation assets have been installed at those sites with the necessary resources, locations that are not always near the most demanded zones, which makes necessary creating new interconnections and reinforcements inj the present network.
Another fact adds up to this situation. Mainly wind plants, due to the nature of their resources and their dominating role among renewable energies, are not manageable, which may cause accelerated production losses and the consequent mismatches in the network frequency in certain circumstances.
This makes the implementation of manageable back-up systems compulsory. These systems are able to provide energy in a safe and quick way in case of mismatch.
Peaker or regulation plants attend this important task by providing the system operators with a tool to establish adequate mechanisms for secondary and tertiary regulation, guaranteeing a safe supply and the integration of renewable energies. This is possible thanks to aero derivative OCGT open cycle gas turbines notable for their fast ramps and high availability.
The services offered by Deenma in this area are those necessary for viability analysis, integral Project monitoring and EPC, as well as technical support, building monitoring and tests with assistance during operation.