Link to document:
Status
Electronic Resource
Call number
Publication
DOE ET 20567 1 2 Book 1; Report; January 1980.
Language
Library's review
ABSTRACT:
The overall, long-term objective of the Solar Central Receiver Hybrid Power System program is to identify, characterize, and ultimately demonstrate the viability and cost effectiveness of solar/fossil, steam Rankine cycle, hybrid power systems that: (1) consist of a combined solar central
The program objective for Phase I is to identify and conceptually characterize solar/fossil steam Rankine cycle, commercial-scale, power plant systems that are economically viable and technically feasible. The basic process constituting the hybrid solar concept as developed to date is shown in Figure 1-1. The principal advantages of this system, when compared with a solar stand-alone plant, for example, is that the solar hybrid plant can operate day and night and during poor insolation conditions. Consequently, full capacity credit can be taken for the plant, and there is no requirement to start up and shut down the steam plant daily. The amount of energy storage that may be required in a hybrid plant can vary from that which will provide only a few minutes of operation (provides a smooth transition from solar to fossil and back) to that which will allow operation for several hours. The amount of storage depends heavily upon the assumptions made for the future cost of coal and oil and the power schedule of the utility grid. Large amounts of storage can readily be accomplished if it is economically viable to do so. In addition, such a plant would exhibit additional operational flexibility. Consequently, our second objective was to develop a conceptual design of a sodium-cooled Hybrid Central Solar Receiver plant which can supply 3 to 4 full power hours of electrical energy from a thermal storage system The third objective was to select a scaled-up version of a hybrid plant with at least 3 full power hours of thermal storage. The plant size to be set by minimizing the busbar energy costs, consistent with technical and economic acceptability.
The overall, long-term objective of the Solar Central Receiver Hybrid Power System program is to identify, characterize, and ultimately demonstrate the viability and cost effectiveness of solar/fossil, steam Rankine cycle, hybrid power systems that: (1) consist of a combined solar central
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receiver energy source and a nonsolar energy source at a single, common site, (2) may operate in the base, intermediate, and peaking capacity modes, (3) produce the rated output independent of variations in solar insolation, (4) provide a significant savings (50% or more) in fuel consumption, and (5) produce power at the minimum possible cost in mills/kWh. It is essential that these hybrid concepts be technically feasible and economically competitive with other systems in the near to mid term time period (1985-1990) on a commercial scale.The program objective for Phase I is to identify and conceptually characterize solar/fossil steam Rankine cycle, commercial-scale, power plant systems that are economically viable and technically feasible. The basic process constituting the hybrid solar concept as developed to date is shown in Figure 1-1. The principal advantages of this system, when compared with a solar stand-alone plant, for example, is that the solar hybrid plant can operate day and night and during poor insolation conditions. Consequently, full capacity credit can be taken for the plant, and there is no requirement to start up and shut down the steam plant daily. The amount of energy storage that may be required in a hybrid plant can vary from that which will provide only a few minutes of operation (provides a smooth transition from solar to fossil and back) to that which will allow operation for several hours. The amount of storage depends heavily upon the assumptions made for the future cost of coal and oil and the power schedule of the utility grid. Large amounts of storage can readily be accomplished if it is economically viable to do so. In addition, such a plant would exhibit additional operational flexibility. Consequently, our second objective was to develop a conceptual design of a sodium-cooled Hybrid Central Solar Receiver plant which can supply 3 to 4 full power hours of electrical energy from a thermal storage system The third objective was to select a scaled-up version of a hybrid plant with at least 3 full power hours of thermal storage. The plant size to be set by minimizing the busbar energy costs, consistent with technical and economic acceptability.
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