Electric Power Generating Subsystem Study for Advanced Water/Steam Receivers. Final Technical Report

摘要

The objective of this particular program was to evaluate the performance and economics of a range of 1985-vintage Rankine power conversion cycles for advanced water/steam solar plant application. The program output provides sufficient information for selection of the optimum power conversion cycle when integrated with other advanced water/steam solar plant systems being developed under separate Sandia contracts. The major program efforts included: cycle screening, performance analysis, and cost analysis. Each of these efforts is described in detail. A wide range of turbine cycle options was evaluated for thermodynamic performance to enable selection of cycles for detailed analysis. Cycles evaluated in the screening study included: nonreheat cycles, solar reheat cycles, and steam reheat cycles. The turbine cycle/thermal storage subsystem combinations selected in the screening process were analyzed in detail over a range of nominal power outputs and throttle conditions. Trade-off studies were performed in several areas to optimize the performance of the nonreheat and reheat cycle configurations. Trade-off studies were performed in the following areas: storage subsystem pressure, number of feedwater heaters functioning during storage operation, casing configurations, single versus dual stage storage, and storage discharge flow rate. The trade-off studies resulted in cycle configurations which were analyzed by a detailed turbine analysis computer code which produced estimates of cycle performance.These results are presented. The costs of the equipment were determined for the selected turbine cycles, including the turbine-generator equipment from the inlet nozzles to the generator busbar together with the support equipment necessary to enable the turbine and generator to function. (ERA citation 05:030437)