Energy Efficiency Assessment of Integrated Energy System in Substation Area

2018 ◽  
Author(s):  
Xin Zhang ◽  
Qingfeng Wen ◽  
Xuliang Zhu ◽  
Chuang Yao ◽  
Mingzheng Zhu ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Energy System ◽  
Efficiency Assessment ◽  
Integrated Energy System

scholarly journals Research on Multi-dimensional Energy Efficiency Assessment Technology of RIES

2020 ◽  
Vol 218 ◽  
pp. 01046
Author(s):  
Kuihua Wu ◽  
Zhijie Zheng ◽  
Lujie Qi ◽  
Rong Liang ◽  
Bo Yang
Keyword(s):  
Energy Efficiency ◽  
Evaluation System ◽  
Energy System ◽  
Assessment Method ◽  
Economic Benefits ◽  
Evaluation Index System ◽  
Efficiency Evaluation ◽  
Efficiency Assessment ◽  
Integrated Energy System ◽  
Energy Efficiency Evaluation

At present, there is a lack of regional comprehensive energy multi-dimensional evaluation system and calculation of different quality energy in the energy efficiency evaluation of regional integrated energy system. Based on this, this article carries out research on multi-dimensional energy efficiency evaluation index system and evaluation methods. First, this article form quantifiable evaluation indicators from the aspects of energy supply subsystem energy efficiency, energy conversion subsystem energy efficiency, grid energy efficiency, economic benefits and social benefits, and clarify the calculation methods of each evaluation indicator. Then this article calculate the indicator combination weight. Finally, a multi-dimensional energy efficiency assessment method for a regional integrated energy system is proposed, and an example is used to prove the effectiveness of the method.

scholarly journals An Energy Efficiency Index Formation and Analysis of Integrated Energy System Based on Exergy Efficiency

2021 ◽  
Vol 9 ◽  
Author(s):  
Huiling Su ◽  
Qifeng Huang ◽  
Zhongdong Wang
Keyword(s):  
Energy Efficiency ◽  
Evaluation Model ◽  
Second Law Of Thermodynamics ◽  
Energy System ◽  
Efficiency Index ◽  
Exergy Efficiency ◽  
Energy Utilization ◽  
Utilization Efficiency ◽  
Efficiency Evaluation ◽  
Integrated Energy System

In the context of the energy crisis and environmental deterioration, the integrated energy system (IES) based on multi-energy complementarity and cascaded utilization of energy is considered as an effective way to solve these problems. Due to the different energy forms and the various characteristics in the IES, the coupling relationships among various energy forms are complicated which enlarges the difficulty of energy efficiency evaluation of the IES. In order to flexibly analyze the energy efficiency of the IES, an operation efficiency evaluation model for the IES is established. First, energy utilization efficiency (EUE) and exergy efficiency (EXE) are proposed based on the first/second law of thermodynamics. Second, the energy efficiency models for five processes and four subsystems of the IES are formed. Lastly, an actual commercial-industrial park with integrated energy is employed to validate the proposed method.

scholarly journals A Marginal Contribution Theory-Based Energy Efficiency Contribution Analysis for Integrated Energy System

2021 ◽  
Vol 9 ◽  
Author(s):  
Shihai Yang ◽  
Mingming Chen ◽  
Qiang Zuo
Keyword(s):  
Energy Efficiency ◽  
Energy Flow ◽  
Energy System ◽  
Efficiency Index ◽  
Efficiency Analysis ◽  
Analysis Method ◽  
Weighted Directed Graph ◽  
Integrated Energy System ◽  
Energy Conversion Devices ◽  
Energy Efficiency Analysis

The energy efficiency analysis is a prerequisite for the construction of the integrated energy system (IES). In this study, a novel energy efficiency analysis method is proposed considering different energy subsystems in the IES. First, the energy efficiency index of the subsystems and conversion devices is formed for elaborating their influence on the IES. The IES is composed of four energy subsystems, i.e., power/gas/heat/cooling subsystems, and six energy conversion devices. Next, the energy efficiency contribution models of energy subsystems and conversion devices are proposed based on their energy efficiency index, respectively. Then, in order to calculate the energy flow in the IES, an equivalent topological model of the IES weighted directed graph is proposed to calculate the energy efficiency contribution. Finally, an actual park is employed to illustrate the validity of the proposed analysis method.

scholarly journals Improved Thermoeconomic Energy Efficiency Analysis for Integrated Energy Systems

Processes ◽  
2022 ◽  
Vol 10 (1) ◽  
pp. 137
Author(s):  
Sha Liu ◽  
Jiong Shen
Keyword(s):  
Energy Efficiency ◽  
Energy System ◽  
Energy Conversion Efficiency ◽  
Integrated Analysis ◽  
Thermal Cycles ◽  
Irreversible Loss ◽  
Integrated Energy Systems ◽  
New Information ◽  
Integrated Energy System ◽  
Combined Cooling

The structure of an integrated energy system is complex. Thermoeconomics can play a significant role in the analysis of IES because it makes up for the deficiency of traditional thermodynamic analysis and provides new information on the cost and energy conversion efficiency. When using thermoeconomics to analyze the energy efficiency of an IES, one key issue that needs to be solved is how to transfer irreversible loss across thermal cycles, so that the mechanism of system performance degradation can be fully revealed. To this end, an irreversible cost and exergy cost integrated analysis method based on improved thermoeconomics is proposed, in which the cumulative and transmission impact of irreversible loss across thermal cycles is evaluated using linear transformation of <KP> matrix. A case study on a 389MW combined cooling, heating, and power IES demonstrates the effectiveness of the proposed approach. The proposed approach can reveal the key links impairing the overall energy efficiency and transfer of irreversible loss across thermal cycles. The approach can be extended to various types of IES to provide directions for the assessment and optimization of the system.

Energy Efficiency Modeling of Integrated Energy System in Coastal Areas

2020 ◽  
Vol 103 (sp1) ◽  
pp. 995
Author(s):  
Chao Yang ◽  
Fengkai Gao ◽  
Mingyu Dong
Keyword(s):  
Energy Efficiency ◽  
Energy System ◽  
Coastal Areas ◽  
Integrated Energy System

scholarly journals A Multi-objective Optimal Dispatch Method for Integrated Energy System Considering Multiple Loads Variations

2021 ◽  
Vol 256 ◽  
pp. 02025
Author(s):  
Dong Lv ◽  
Jun Tang ◽  
Chen Yang
Keyword(s):  
Energy Efficiency ◽  
Energy System ◽  
Decision Makers ◽  
Initial Population ◽  
Load Variations ◽  
Optimal Dispatch ◽  
Multi Objective ◽  
Load Demand ◽  
Integrated Energy System ◽  
Scheduling Plan

This paper proposes a multi-objective optimization dispatching method for the Integrated Energy System (IES), in which cooling/heating/electricity multi-load demand are included, and IES’s requirements in terms of energy efficiency, economy, and emissions are considered. We established an IES model for multi-objective optimal dispatch, and simulated cooling/heating/electric multiple load variations in it; then we established multiple objective functions based on IES’s scheduling requirements in terms of energy efficiency, economy, environmental issues. The model is solved by finding the pareto front based on genetic algorithm (GA), so that the decision makers can filter out the scheduling plan based on their preference, in which single-objective optimization is used first to find out the initial population for GA. Finally, the proposed method’s effectiveness is verified by case studies.

Sign in / Sign up

Export Citation Format

Share Document