scholarly journals Environmental Impact Evaluation of Distributed Renewable Energy System Based on Life Cycle Assessment and Fuzzy Rough Sets

Energies ◽  
2019 ◽  
Vol 12 (21) ◽  
pp. 4214 ◽  
Author(s):  
Chengzhou Li ◽  
Ningling Wang ◽  
Hongyuan Zhang ◽  
Qingxin Liu ◽  
Youguo Chai ◽  
...  
Keyword(s):  
Life Cycle Assessment ◽  
Renewable Energy ◽  
Life Cycle ◽  
Rough Sets ◽  
Environmental Effect ◽  
Evaluation Method ◽  
Energy System ◽  
Distributed Energy ◽  
Renewable Energy System ◽  
Distributed Energy System

The distributed renewable energy system, integrating various renewable energy resources, is a significant energy supply technology within energy internet. It is an effective way to meet increasingly growing demand for energy conservation and environmental damage reduction in energy generation and energy utilization. In this paper, the life cycle assessment (LCA) method and fuzzy rough sets (FRS) theory are combined to build an environmental evaluation model for a distributed renewable energy system. The ReCiPe2016 method is selected to calculate the environmental effect scores of the distributed energy system, and the FRS is utilized to identify the crucial activities and exchanges during its life cycle from cradle to grave. The generalized evaluation method is applied to a real-world case study, a typical distributed energy system located in Yanqing District, Beijing, China, which is composed of wind power, small-scale hydropower, photovoltaic, centralized solar thermal power plant and a biogas power plant. The results show that the environmental effect of per kWh power derived from the distributed renewable energy system is 2.06 × 10−3 species disappeared per year, 9.88 × 10−3 disability-adjusted life years, and 1.75 × 10−3 USD loss on fossil resources extraction, and further in the uncertainty analysis, it is found that the environmental load can be reduced effectively and efficiently by improving life span and annual utilization hour of power generation technologies and technology upgrade for wind turbine and photovoltaic plants. The results show that the proposed evaluation method could fast evaluate the environmental effects of a distributed energy system while the uncertainty analysis with FRS successfully and effectively identifies the key element and link among its life span.

Life cycle assessment (LCA) and life cycle cost (LCC) analysis model for a stand-alone hybrid renewable energy system

2016 ◽  
Vol 95 ◽  
pp. 337-355 ◽  
Author(s):  
Antonella Petrillo ◽  
Fabio De Felice ◽  
Elio Jannelli ◽  
Claudio Autorino ◽  
Mariagiovanna Minutillo ◽  
...  
Keyword(s):  
Life Cycle Assessment ◽  
Renewable Energy ◽  
Life Cycle ◽  
Life Cycle Cost ◽  
Energy System ◽  
Analysis Model ◽  
Hybrid Renewable Energy System ◽  
Renewable Energy System ◽  
Hybrid Renewable Energy

Economic benefit evaluation method for the micro-grid renewable energy system operation

2018 ◽  
Vol 09 (04) ◽  
pp. 1850032 ◽  
Author(s):  
Jiani Wu
Keyword(s):  
Renewable Energy ◽  
Economic Benefit ◽  
Evaluation Method ◽  
Energy System ◽  
System Operation ◽  
Benefit Evaluation ◽  
Renewable Energy System ◽  
Network Operation ◽  
Micro Grid ◽  
Flexible Operation

The development of micro-grid renewable energy system in China has achieved rapid growth in recent years, and the micro-grid renewable energy system has been drawing more and more attention by its flexible operation. Due to the randomness, fluctuation, uncertainty of the wind and photovoltaic renewable generation, abundant flexibility is required to meet the needs of safe, reliable and independent operation of the micro-grid energy system. We need to connect large energy systems to accept outside assistance when the micro-grid renewable energy system is short of adjustment capability. Independent operation and network operation will affect the economic benefit of the micro-grid energy system, so it is practically meaningful to study on the economic benefit evaluation of the micro-grid renewable energy system. This paper proposes a micro-grid energy system operation simulation model about wind and photovoltaic generation, the uncertainty of which is tackled based on the scenario generation and extraction techniques. Based on the proposed indices, the economic benefit could be evaluated by simulating the micro-grid energy system operation. The proposed method is validated by a real micro-grid energy system.

scholarly journals Improving Simultaneous Cooling and Power Load-Following Capability for MGT-CCP Using Coordinated Predictive Controls

Energies ◽  
2019 ◽  
Vol 12 (6) ◽  
pp. 1180 ◽  
Author(s):  
Chen Chen ◽  
Jiangfan Lin ◽  
Lei Pan ◽  
Kwang Lee ◽  
Li Sun
Keyword(s):  
Renewable Energy ◽  
Predictive Control ◽  
Energy Supply ◽  
Renewable Energy Sources ◽  
Energy System ◽  
Generalized Predictive Control ◽  
Distributed Energy ◽  
Load Following ◽  
Power Load ◽  
Distributed Energy System

The distributed energy system is an energy supply method built around the end users, which can achieve energy sustainability and reduce emissions compared to traditional centralized energy systems. The micro gas turbine (MGT)-based combined cooling and power (CCP) system has received renewed attention as an important distributed energy system technology due to its substantial energy savings and reduced emission levels. The task of the MGT-CCP system is to quickly adapt to changes in various renewable energy sources to maintain the balance in energy supply and demand in a distributed energy system. Therefore, it is imperative to improve the load tracking capability of the MGT-CCP system with advanced control technologies toward achieving this goal. However, the difficulty of controlling the MGT-CCP system is that the MGT responds very fast while CCP responds very slowly. To this end, the dynamic characteristics and nonlinear distribution of the MGT and CCP processes are analyzed, and a coordinated predictive control strategy is proposed by utilizing the generalized predictive control for the MGT system and the Hammerstein generalized predictive control for the CCP system. The coordinated predictive control of generalized predictive control and Hammerstein generalized predictive control was implemented in an 80 kW MGT-CCP simulator to verify the effectiveness of the proposed method. The simulation results show that compared with PID and MPC, the proposed control method not only can greatly improve simultaneous cooling and power load-following capability, but also has the best control effect when accessing with renewable energy.

scholarly journals A multi-criteria comprehensive evaluation method for distributed energy system

2019 ◽  
Vol 158 ◽  
pp. 3748-3753 ◽  
Author(s):  
Haibo Dai ◽  
Jinshi Wang ◽  
Gen Li ◽  
Weixiong Chen ◽  
Binbin Qiu ◽  
...  
Keyword(s):  
Evaluation Method ◽  
Comprehensive Evaluation ◽  
Energy System ◽  
Distributed Energy ◽  
Comprehensive Evaluation Method ◽  
Distributed Energy System

Application and Analysis of Multi-Source Hybrid Distributed Energy System

2014 ◽  
Vol 1008-1009 ◽  
pp. 1462-1465
Author(s):  
Yin Yin Ban ◽  
Hong Bo Ren ◽  
Qiong Wu ◽  
Jian Yang
Keyword(s):  
Renewable Energy ◽  
Environmental Issues ◽  
Energy System ◽  
Energy Resources ◽  
Energy Crisis ◽  
Distributed Energy Resources ◽  
Distributed Energy ◽  
Efficient Utilization ◽  
Global Energy ◽  
Distributed Energy System

Under the background of the global energy crisis and environmental issues, the efficient utilization of renewable energy as a kind of distributed energy resources, is paid more and more attention. However, the intermittency and unpredictability of the renewable energies limit its development and penetration. To deal with such a big challenge, the multi-source hybrid distributed energy system has been proposed. In this paper, the concept and characteristics of the multi-source hybrid distributed energy system are discussed. In addition, three main forms of the proposed innovation energy system are presents and compared.

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