scholarly journals Optimal Planning for Energy Stations and Networks in Distributed Energy Systems Based on Voronoi Diagram and Load Characteristics

2021 ◽  
Vol 11 (16) ◽  
pp. 7526
Author(s):  
Jiazheng Wu ◽  
Jiamin Yuan ◽  
Yingjun Ruan ◽  
Fanyue Qian ◽  
Hua Meng
Keyword(s):  
Voronoi Diagram ◽  
Energy Supply ◽  
Energy Systems ◽  
Optimization Method ◽  
Distributed Energy ◽  
Relative Load ◽  
New Energy ◽  
Partition Method ◽  
The Cost ◽  
Station Location

In the existing station network planning of distributed energy systems (DESs), most of them determined the location of energy station in the alternative station site, there was a lack of a mature energy station location optimization method, and the factor load was not considered in the division of energy supply scope. This paper aimed to propose an optimal site approach for distributed energy stations based on Voronoi diagram, in which all possible candidates of energy station locations were considered. The candidate sites could be any point in the whole area. Simultaneously, after analyzing the limitations of the traditional energy supply partition method, we proposed a new energy supply partition optimization method, relative-load-distance. It was found that the annual cost of the whole system was significantly reduced by 1%, although the cost of the network in the optimized supply area was increased, compared with the supply area obtained by the partition method based on the principle of minimum distance. In addition, by adjusting the coefficient K in the relative-load-distance, the effectiveness of the optimization method in DES planning was verified.

Emerging Role for Absorption Chillers in Integrated Energy Systems in America

2002 ◽  
Author(s):  
Gearoid Foley ◽  
Richard Sweetser
Keyword(s):  
Energy Supply ◽  
Energy Systems ◽  
Prime Mover ◽  
Market Place ◽  
Distributed Energy ◽  
Absorption Chiller ◽  
Building Stock ◽  
Improve Energy Efficiency ◽  
Absorption Chillers ◽  
Integrated Energy Systems

President Bush’s National Energy Policy, Clear Skies and the Global Climate Change Initiatives form a comprehensive roadmap to a secure, clean, reliable, and affordable energy supply for the future. These far reaching policy proposals rely heavily on the development of distributed energy systems. The cornerstone of distributed energy systems is the emergence of Integrated Energy Systems (IES), which will permit consulting engineers to substantially improve energy efficiency. Thermally Activated Technologies, in general, and absorption chillers, in particular, are increasingly being viewed as an important element to effectively apply IES designs to the American building stock. This paper will examine testing, demonstration projects and commercial applications of combining absorption chiller equipment with microturbines, engines, combustion turbines and thermal solar systems. Technical challenges of coupling absorption chillers to prime mover exhaust streams will be explored. Application specific integration of coincident power generation and thermal energy supply to satisfy building loads will yield economic metrics that will determine which combinations of prime mover and absorption chiller will succeed in the market place today and which combinations require more research and development.

scholarly journals Research on Interactive Scenarios and Mechanisms of Energy Supply and Use Modules of Park-level Integrated Energy System

2021 ◽  
Vol 236 ◽  
pp. 02007
Author(s):  
Zhao Pengxiang ◽  
Li Na ◽  
Li Zhiyuan ◽  
Wang Nan
Keyword(s):  
Energy Supply ◽  
Interaction Mechanism ◽  
Energy Systems ◽  
Clean Energy ◽  
Energy System ◽  
Distributed Energy ◽  
Energy Internet ◽  
Energy Storage Technology ◽  
Integrated Energy System ◽  
Smart Grid Technology

The integrated energy system can realize the complementary advantages of multiple energy sources and effectively solve the problem of low integrated energy efficiency of traditional energy systems. Carrying out research on the interactive scenarios and mechanisms of the energy supply and use modules of the integrated energy system is conducive to promoting the development of clean energy and promoting the indepth integration of energy Internet and distributed energy technology, smart grid technology, and energy storage technology. First, it summarizes the scenarios of the energy supply and use modules of the integrated energy system, and analyzes the interaction mechanism and paths of the energy supply and use modules of the integrated energy system on this basis.

scholarly journals Optimization of Pipeline Network Layout for Multiple Heat Sources Distributed Energy Systems Considering Reliability Evaluation

Processes ◽  
2021 ◽  
Vol 9 (8) ◽  
pp. 1308
Author(s):  
Ziyuan Cui ◽  
Hai Lin ◽  
Yan Wu ◽  
Yufei Wang ◽  
Xiao Feng
Keyword(s):  
Annual Cost ◽  
Energy Systems ◽  
Energy System ◽  
Optimization Method ◽  
Total Annual Cost ◽  
Heat Sources ◽  
Distributed Energy ◽  
Pipeline Network ◽  
Distributed Energy System ◽  
Steiner Minimum Tree

Due to the target of carbon neutrality, energy saving has become more important than ever. At the same time, the widespread use of distributed energy systems and the regional utilization of industrial waste heat leads to the existence of multiple heat sources in an area. Therefore, how to design an economical and reliable pipeline network to meet energy-saving demand under multiple heat source conditions becomes a problem. In this work, an optimization method is established to determine the optimal pipeline network topology with minimum total annual cost. In this optimization method, Star tree algorithm, Kruskal algorithm and GeoSteiner algorithm are combined with a linear programming model to establish a distributed energy pipeline network for multiple heat sources. The model incorporates Euclidean Steiner Minimum Tree and Rectilinear Steiner Minimum Tree in the consideration of the topology optimization of Distributed Energy System pipeline networks. Four pipeline network topologies, STAR, Minimum Spanning Tree, Euclidean Steiner Minimum Tree and Rectilinear Steiner Minimum Tree, are evaluated in this paper from economic and reliability perspectives. A case extracted from a real industrial park where steam is the medium is used to prove the validity of the model. The optimization results show that a Euclidean Steiner Minimum Tree pipeline network has a lower total annual cost than three other types of pipeline network and ranks second in reliability. Considering the comprehensive economy and reliability, ESMT is the optimal pipeline network type of distributed energy system with steam as the medium.

Development Prospects of Distributed Energy System in China

2008 ◽  
Author(s):  
Guohua Shi ◽  
Songling Wang ◽  
Youyin Jing ◽  
Yuefen Gao
Keyword(s):  
Energy Supply ◽  
Energy Demand ◽  
Energy Systems ◽  
Energy System ◽  
Combined Heat And Power ◽  
Distributed Energy ◽  
Distributed Energy System ◽  
Recent Trends ◽  
The Government ◽  
Development Prospects

With the rapid economic development, the energy demand is rising and energy-related greenhouses gas emissions are growing rapidly in China. The usage percent of renewable energy in use is still low while the energy consumption is still increasing. Due to the expanding pressure from energy demand, environment concerns and society issues, distributed energy systems (DESs), especially combined heat and power (CHP), are encouraged and expected to play a greater role by the government. This paper mainly seeks to explore and answer some of questions. Firstly, the different technologies of various DES options are briefly reviewed. Then the question of why distributed energy systems should be developed in China is considered. Recent trends and current patterns of energy supply and use in China are also discussed. Some typical distributed energy systems used in China are introduced. This article also discusses what barriers need be overcome if China wishes to move towards a sustainable energy future. Finally, several suggestions are proposed to favor the wide application of DES in China. It is concluded that DES is a good option with respect to China’s sustainable development that has institutional, market and regulatory support.

scholarly journals A cost-based approach for evaluating the impact of a network of distributed energy systems on the centralized energy supply

2018 ◽  
Vol 31 (1) ◽  
pp. 77-87
Author(s):  
Alberto Fichera ◽  
Mattia Frasca ◽  
Rosaria Volpe
Keyword(s):  
Energy Distribution ◽  
Urban Areas ◽  
Energy Supply ◽  
Energy Demand ◽  
Distribution Network ◽  
Energy Systems ◽  
Distributed Energy ◽  
International Panel ◽  
Urban Territories ◽  
The Impact

According to the Fifth Assessment Report of the International Panel on Climate Change, cities account for the 67% of the global energy demand and are the major contributors in emitting CO2 in the atmosphere. To face this problem, National and European policies pushes towards the insertion of distributed energy systems within urban areas as a valid alternative to the traditional centralized energy supply. In this direction, the installation of distributed energy systems gives raise to consumers with production capabilities, by now called ‘prosumers’. They use the autonomously produced energy to satisfy their own energy requirements and distribute the eventual exceed to neighbours. Yet, the energy exchanges occurring among prosumers permit the modelling of a network where nodes are identified as the prosumers and the energy interactions as links. This paper deals with this issue and proposes a cost-based methodology to model the energy distribution network of prosumers within the urban territories by deepening their impact on the traditional supply. Results are discussed by comparing a theoretical energy distribution network to a real case study.

New integrated converter for hydrogen buffer interfacing in distributed energy systems

2011 ◽  
pp. 998-1003
Author(s):  
D. Vinnikov ◽  
A. Andrijanovitš ◽  
I. Roasto ◽  
T. Lehtla
Keyword(s):  
Energy Systems ◽  
Distributed Energy
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