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Characteristics and economic evaluation of a CO 2 ‐capturing solar thermal hybrid power generation system with heat storage
Author(s) -
Sik Pak Pyong,
Kosugi Takanobu,
Suzuki Yutaka
Publication year - 1999
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/(sici)1520-6416(199903)126:4<21::aid-eej3>3.0.co;2-6
Subject(s) - thermal energy storage , environmental science , solar energy , process engineering , electricity generation , photovoltaic thermal hybrid solar collector , thermal power station , nuclear engineering , thermal , solar power , engineering , power (physics) , waste management , electrical engineering , meteorology , thermodynamics , physics
For wide use of a power plant utilizing solar energy, improvement of its economics is important. Both the economics and characteristics of a CO 2 ‐capturing solar thermal hybrid power generation system are evaluated in this paper. Since a relatively low temperature steam of 220 °C is produced by using solar thermal energy and is utilized as the working fluid of a gas turbine, the solar collector can attain high heat collecting efficiency. The net fuel‐to‐electricity conversion efficiency of the hybrid system is estimated to be higher than 60% on the lower‐heating‐value‐ basis. It has been estimated that the gross income and the period of depreciation of the proposed system are 34.8 × 10 5 yen/year and 8.89 years, respectively, and that the system is economically feasible, under the assumptions of a solar collector area of 10 ha, a maximum net power output of 4 MW, and a heat storage capacity of 2000 m 3 . The amount of fuel saving and reduction of CO 2 emission of our system, compared to a conventional natural gas firing plant, are also estimated in the paper. © 1999 Scripta Technica, Electr Eng Jpn, 126(4): 21–29, 1999