Characteristics and economic evaluation of a CO2-capturing solar thermal hybrid power generation system with heat storage
✍ Scribed by Pyong Sik Pak; Takanobu Kosugi; Yutaka Suzuki
- Publisher
- John Wiley and Sons
- Year
- 1999
- Tongue
- English
- Weight
- 491 KB
- Volume
- 126
- Category
- Article
- ISSN
- 0424-7760
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✦ Synopsis
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-valuebasis. 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.