Arid
DOI10.1016/j.apenergy.2019.113328
Coupling supercritical carbon dioxide Brayton cycle with spray-assisted dry cooling technology for concentrated solar power
Sun, Yubiao; Duniam, Sam; Guan, Zhiqiang; Gurgenci, Hal; Dong, Peixin; Wang, Jianyong; Hooman, Kamel
通讯作者Sun, Yubiao ; Dong, Peixin
来源期刊APPLIED ENERGY
ISSN0306-2619
EISSN1872-9118
出版年2019
卷号251
英文摘要Supercritical carbon dioxide (sCO(2)) based Brayton cycle integrated with concentrated solar power applications is a promising technology to exploit solar energy for electricity production. To reduce the energy cost of this solar power plant, spray-assisted dry cooling technology is developed, which makes electricity more affordable for isolated and arid regions. However, pure dry cooling technology suffers from low efficiency under high ambient conditions and a spray cooling system has been proposed to address this problem. Due to the high cost and great complexity, experimental test of a designed spray cooling system on a natural draft dry cooling tower is never reported. Here a spray cooling system consisted of multiple nozzles was tested on a 20 m high experimental tower. This is, to our knowledge, the world's first attempt to practice spray enhancement of NDDCT at full scale. It is found that the introduced spray cooling can effectively precool the inlet hot air and consequently reduce the circulating water exit temperature. The promising application of this new technology in solar power plants was firstly revealed by integrating the tower into a 1 MW concentrated solar thermal sCO(2) Brayton cycle. As spraying water flowrate increases, cooling tower dissipates more waste heat, lowering the compressor inlet temperature and consequently improving the efficiency of thermal cycle. Power cycle simulations also show that cycle efficiency can be higher than 40.5% at the optimal circulating water flow rate, i.e., 4-5 kg/s, depending on the sCO(2) flow rate.
英文关键词Natural draft dry cooling tower Spray cooling system Water evaporation Heat capacity Solar energy Concentrated solar power Supercritical CO2 Brayton cycle
类型Article
语种英语
国家Australia
收录类别SCI-E
WOS记录号WOS:000497966300041
WOS关键词WATER SPRAY ; INLET AIR ; PERFORMANCE ; MEDIA ; SIMULATION ; TOWERS
WOS类目Energy & Fuels ; Engineering, Chemical
WOS研究方向Energy & Fuels ; Engineering
EI主题词2019-10-01
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/310238
作者单位Univ Queensland, Sch Mech & Min Engn, Brisbane, Qld 4072, Australia
推荐引用方式
GB/T 7714
Sun, Yubiao,Duniam, Sam,Guan, Zhiqiang,et al. Coupling supercritical carbon dioxide Brayton cycle with spray-assisted dry cooling technology for concentrated solar power[J],2019,251.
APA Sun, Yubiao.,Duniam, Sam.,Guan, Zhiqiang.,Gurgenci, Hal.,Dong, Peixin.,...&Hooman, Kamel.(2019).Coupling supercritical carbon dioxide Brayton cycle with spray-assisted dry cooling technology for concentrated solar power.APPLIED ENERGY,251.
MLA Sun, Yubiao,et al."Coupling supercritical carbon dioxide Brayton cycle with spray-assisted dry cooling technology for concentrated solar power".APPLIED ENERGY 251(2019).
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