ABSTRACT
Case study #3 discusses the addition of a thermal energy storage plant to enhance output of this combined-cycle-cogeneration plant by cooling the gas turbine inlet air to 43 degrees F. The plant is a qualified facility (QF) in accordance with the Public Utilities Regulatory Policies Act (PURPA) of 1978. The major components of the facility are the gas turbine generator, the heat recovery steam generator and the steam turbine generator. The plant maintains a continuous emissions monitoring system (CEM) to monitor the output criteria pollutants. This unit continuously samples stack gases and relays the results to a dedicated control room computer for calculating emissions in the format requested by the local air district. According to the terms of the Power Purchase Agreement, the utility provides an annual nonbinding estimate of hours to be operated during curtailable periods. This estimate is used to budget and acquire the fuel supplies for the coming year, coordinate annual maintenance activities, and budget operating costs.
