Capital Cogeneration
In 1983, H. B. Zachry Company of San Antonio obtained a contract from Capital Cogeneration Company Ltd., a joint venture, including Central and Southwest Power Corporation (CSW), to design and build a 450MW combined cycle/cogeneration plant near Bayport, Texas, south of Houston. This was one of the earliest cogeneration plants to be built in the United States under the new Public Utility Regulatory Policies Act (PURPA) regulations. At the time, such plants were often referred to as "PURPA Plants."
Westinghouse obtained the order for three W501D5 EconoPacs for integration into the combined cycle plant, with heat recovery steam generators supplied by Henry Vogt Company. The plant exported power for sale to the Houston Power and Light Company and steam to a nearby process plant owned by Celanese Chemical Group, Inc., the "steam host." Thanks to excellent field sales relationship with Zachry and CSW, this plant was essentially an all-Westinghouse plant, including the 150MW-class steam turbine generator and all power electrics. Today, the plant is known as Clear Lake Cogeneration and is owned by the Calpine Corporation.