Combined Cycle for Solar-Fossil Hybrid Power Generation

摘要

A study of the combined cycle solar hybrid system concept was initiated in October, 1978 at Bechtel as part of the solar power development program of the Department of Energy (DOE). Parametric studies were conducted on a near term and an advanced version of a nominal 100 MWe (net) commercial power system. These studies, combined with analyses of market potential in the 1985-1990 time frame, will serve as bases for selecting one of these two concept versions for conceptual design during the second half of this 12 month study. A technical and economic assessment of the concept and the preparation of a development plan and proposal will complete the study project. The combined cycle hybrid system selected by the Bechtel team for the study consists of an air operated open Brayton cycle with a steam Rankine bottoming cycle utilizing the gas turbine waste heat. Solar energy is used to preheat the air in the gas turbine cycle, with the air cooled receiver, located upstream from the combustor in a series arrangement. Cycle efficiencies of 43.5 and 47.7 percent and average annual solar fractions of .312 and .408 were predicted for the near term and advanced versions respectively. (ERA citation 04:054394)