干旱区生态环境知识资源中心(Arid): Techno-economic optimization of coupling a cascaded MED system to a CSP-sCO(2) power plant

Arid

DOI	10.1016/j.enconman.2021.114725
	Techno-economic optimization of coupling a cascaded MED system to a CSP-sCO(2) power plant
	Omar, Amr; Saldivia, David; Li, Qiyuan; Barraza, Rodrigo; Taylor, Robert A.
通讯作者	Taylor, RA (corresponding author), Univ New South Wales, Sch Mech & Mfg Engn, Sydney, NSW 2052, Australia.
来源期刊	ENERGY CONVERSION AND MANAGEMENT
ISSN	0196-8904
EISSN	1879-2227
出版年	2021
卷号	247
英文摘要	Integrating a multi-effect distillation (MED) process with a concentrated solar power (CSP) plant can enable a sustainable solution to meet our global society's increasing energy and freshwater demands. This integration makes possible the 'free' reuse of waste heat from an advanced power block, albeit at slightly reduced thermal efficiency. As such, this study can be considered a pioneering analysis of the potential of integrating a cascaded MED system with a supercritical CO2 (sCO(2)) cycle, which provides two main innovations: (a) a highly efficient sCO(2) cycle is proposed to mitigate the energy efficiency penalty of the more traditional (Rankine Cycle) in CSP-Desalination (CSP-D) coupling, and (b) a cascaded MED system is proposed to recover much more of the rejected waste heat than a single MED configuration. These two innovations were explored in detail by employing an inhouse thermo-economic numerical model, which was validated using literature data. It was found that 4-MED systems maximized the distillate production, with 57% waste heat energy recovery compared to 26% energy recovery using a single-MED system. Encouraged by this positive performance boost, an economic feasibility analysis was conducted by considering the installation site (i.e., pipeline distance from the coastline and the direct normal irradiance (DNI) resource) and the potential revenue from a power purchasing agreement (PPA) and a water purchasing agreement (WPA). It was found that the desalination process has a negligible effect on the payback due to the limited water production (i.e., similar to 1 million m(3)/yr) compared to the high electricity generation (i.e., similar to 190 GWh/yr). Thus, reducing the power block's investment cost and installing the plant in high PPA markets (i.e., above 20 UScents/kWh) represent the two most significant factors for improving the plant's feasibility. It was also found that a 0.6 kWh/m(2) day of additional DNI is required to offset each 100 km of pumping energy consumption (for a PPA of 20 UScents/kWh and WPA of 1.5 USD/m(3)) for a payback period of less than 20 years. Furthermore, a non-linear regression model was applied to develop a correlation that researchers can use to explore any potential sites that could benefit from this technology. This correlation was tested on water-stressed countries with access to the sea and high solar resources. It was found that countries with high electricity prices (i.e., above 20 UScents/kWh), such as Australia, Chile, Jordan, Somalia, Spain, and the Southwest region of the USA, could benefit most from using this cogeneration plant, but (unfortunately) the gulf states, where fossil-fuel desalination is dominant, are unlikely to see an immediate economic benefit from the proposed plant. Thus, this study provides deeper insights on how CSP-sCO(2)-MED cogeneration plants can help 'green-terraform' arid lands and help water-stressed countries.
英文关键词	Supercritical CO2 Brayton cycle Concentrated solar power plant Multi-effect distillation Thermo-economic analysis Cogeneration plant Geographical arbitrage
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000696671000001
WOS关键词	WASTE HEAT ; SOLAR ; DESALINATION ; DRIVEN ; TEMPERATURE ; INTEGRATION ; DESIGN ; ENERGY ; STATE ; CYCLE
WOS类目	Thermodynamics ; Energy & Fuels ; Mechanics
WOS研究方向	Thermodynamics ; Energy & Fuels ; Mechanics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/363078
作者单位	[Omar, Amr; Taylor, Robert A.] Univ New South Wales, Sch Mech & Mfg Engn, Sydney, NSW 2052, Australia; [Saldivia, David] Univ New South Wales, Sch Photovolta & Renewable Energy Engn, Sydney, NSW 2052, Australia; [Li, Qiyuan] Univ New South Wales, Sch Chem Engn, Sydney, NSW 2052, Australia; [Barraza, Rodrigo] Univ Tecn Federico Santa Maria, Dept Mech Engn, Ave Vicuna Mackenna 3939, Santiago, Chile
推荐引用方式 GB/T 7714	Omar, Amr,Saldivia, David,Li, Qiyuan,et al. Techno-economic optimization of coupling a cascaded MED system to a CSP-sCO(2) power plant[J],2021,247.
APA	Omar, Amr,Saldivia, David,Li, Qiyuan,Barraza, Rodrigo,&Taylor, Robert A..(2021).Techno-economic optimization of coupling a cascaded MED system to a CSP-sCO(2) power plant.ENERGY CONVERSION AND MANAGEMENT,247.
MLA	Omar, Amr,et al."Techno-economic optimization of coupling a cascaded MED system to a CSP-sCO(2) power plant".ENERGY CONVERSION AND MANAGEMENT 247(2021).