Sao Paulo was planning to develop a new combined cycle gas power plant. The preliminary design study was assigned to Duke Energy Brazil to select the site (three possibilities) and calculate the optimal capacity.

The sites differed in altitude, climate (temperature and humidity), water resources and grid connection possibilities.

The study assessed the environmental impact and access requirements, as well as the technical constraints and opportunities involved in building and operating the plant.

Attention was paid to the choice of turbine equipment, based on the following strategic criteria:

– Net energy production

– Gas consumption

– Net output (up to 61% in combined cycle)

– End energy cost

– Annual operating costs


setec’s role was to facilitate the choice of site and equipment for an electrical power plant:

- Variation in turbine parameters: calculating production at 300-900 MWe.

- Comparison of turbines and performance implications

- Assessment and recommendations



Key figures

Period of services

May 2014 – July 2016

Key challenges

Single-shaft combined cycle gas turbines (vs. double-shaft) are typically well suited to continuous energy production.

The choice of gas turbine equipment should minimize the heat rate and optimize net performance. Other criteria should be taken into consideration when the turbine works in combined mode, such as the pressure rate and the outlet temperature. Operating parameters, such as the average interval between maintenance operations, should also be taken into account.