Cogeneration has proven to be an ideal application for gas turbines, one which subsidiaries of Texaco Producing Inc. and Mission Energy Company have developed in three successful projects to date. The 38 MW Mid-Set project is the latest, having been commissioned for commercial operation in April, 1989.

Several of the Mid-Set design features were developed from past operating experience, while other design features were employed to meet requirements specific to the project. Strict pollution control required the use of water injection, selective catalytic reduction, continuous emissions monitoring and minimal production of waste water. Other design considerations were plant availability, operability and efficiency for the continuous, base load operation of a turbine-generator. The design features and initial operating history of the Mid-Set cogeneration plant are described in this paper.