期刊
JOURNAL OF SOLAR ENERGY ENGINEERING-TRANSACTIONS OF THE ASME
卷 132, 期 3, 页码 -出版社
ASME-AMER SOC MECHANICAL ENG
DOI: 10.1115/1.4001563
关键词
solar thermal power plant; direct steam generation; thermal storage
资金
- German Ministry for the Environment, Nature Conservation and Nuclear Safety [16UM0064]
For the future market potential of parabolic trough power plants with direct steam generation (DSG), it is beneficial to integrate a thermal storage system. Heat storage media based on phase change materials offer heat transfer at constant temperatures needed for the evaporation process. Different options for a plant layout are presented and discussed. The interactions between the three subsystems-solar field, power block, and thermal storage-are analyzed, and boundary conditions arising from the thermal storage system are identified. Compared with a system without storage the number of operating points increases significantly since different combinations of storage charge and discharge operations go along with a varying power output of the solar field. It is shown that the large number of theoretical operating points can be reduced to a subset with practical relevance. Depending on the live steam parameters a reheat is necessary within the power block. Compared with parabolic trough fields with a single phase heat transfer medium such as oil, a special heat exchanger configuration is needed for a DSG plant. Different alternatives based on available technologies are presented and evaluated. [DOI: 10.1115/1.4001563]
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