Thermodynamic performance of a novel solar tower aided coal-fired power system

被引：19
作者：
Li, Chao [1 ]
Zhai, Rongrong [2 ]
Zhang, Bin [1 ]
Chen, Wei [1 ]
机构：
[1] Qingdao Univ Sci & Technol, Coll Electromech Engn, Qingdao 266061, Peoples R China
[2] North China Elect Power Univ, Sch Energy Power & Mech Engn, Beijing 102206, Peoples R China
来源：
APPLIED THERMAL ENGINEERING | 2020年 / 171卷
关键词：
Solar tower technology; Coal-fired power system; Solar reheater; Fuel-saving mode; Power-boosting mode; GENERATION SAPG PLANT; DOUBLE-SOURCE BOILER; HEAT; ENERGY; OPTIMIZATION; OPERATION; INTEGRATION; CONFIGURATION; EXERGY; AREAS;
D O I：
10.1016/j.applthermaleng.2020.115127
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
In this paper, a novel solar tower aided coal-fired power (STACP) system is proposed by introducing a solar reheater. In this system, solar energy is used to reheat exhaust steam from an immediate turbine to improve the operating parameter of a regenerative cycle. The thermodynamic, environment, and economic performances of the STACP system in both power-boosting (PB) and fuel-saving (FS) modes are discussed and compared. Subsequently, the effects of reheat temperature and system power load are investigated. Results indicate that for a 300 MWe coal-fired unit, the solar energy used in the PB and FS modes are 81.82 and 71.69 MW, respectively. Compared with the coal-fired power system, the standard coal consumption rate of the STACP system in PB and FS modes can be reduced by 35.98 and 34.99 g/kWh, respectively, whereas the CO2 emission rate of the STACP system in PB and FS modes can be reduced by 101.79 and 98.99 g/kWh, respectively. The additional equipment cost of a solar field in PB and FS modes are 49.76 and 43.60 million US$, respectively. Moreover, the cost of electricity for power generated by solar energy for both modes is 3.37 US cents/kWh.
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页数：8
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