Energy Efficiency Evaluation Index Research Articles

Energy Efficiency Evaluation Method of Customer-side Integrated Energy System

At present, the integrated energy efficiency evaluation (EEE) system based on subsystems is not yet mature. Combining the characteristics of modularization and decentralization of the integrated energy system (IES), based on the membership function of fuzzy theory and the AHP method, this paper constructs a set of customer-side comprehensive EEE system, which covering all kinds of energy sources including electricity, gas, cooling, heat, water and so on. On this basis, the method of comprehensive energy efficiency evaluation index (EEEI) based on subsystem is summarized which can meet the requirements of breadth and depth of comprehensive EEE and provide decision basis for system design and operation.

Research on multi-source coordination evaluation model of regional energy Internet

Energy Internet is the direction of energy development and an important means to change energy structure and improve energy efficiency. In order to promote the application and development of energy Internet, starting with the study of the key factors affecting the level of energy efficiency in the regional energy system, a multi-source optimization energy efficiency evaluation index system of regional energy Internet is established. Through the subjective evaluation of the first level indicators, the objective evaluation of the second level indicators and the final comprehensive empowerment, the comprehensive evaluation model of regional energy Internet multi-source optimization energy efficiency is built. Finally, taking a multi-source coordinated optimization operation of a park in Zhejiang Province as an example, the scientific rationality of the evaluation indexes and methods is verified.

Energy Efficiency Evaluation of Industrial Heat Exchangers Based on Fuzzy Matter Element Method

According to the energy consumption status of industrial heat exchanger in the whole life cycle, the energy efficiency evaluation index system of industrial heat exchanger is put forward firstly. Secondly, aiming at the complexity and fuzziness of energy consumption of industrial heat exchanger, the energy efficiency evaluation model of industrial heat exchanger based on fuzzy matter-element method is established by using fuzzy matter-element theory and combining the concept of Hemingway schedule. Finally, taking the shell-and-tube heat exchanger as an example, five shell-and-tube heat exchangers with different designs and materials were selected to analyze their energy consumption advantages and disadvantages. Via calculation and analysis, the optimal energy efficiency design of the shell-and-tube heat exchanger was obtained. At the same time, reference opinions were provided for the design and manufacture of the shell-and-tube heat exchanger.

Integrated energy efficiency evaluation of a multi-source multi-load desalination micro-energy network

With increasing global shortage of fresh water resources, many countries are prioritizing desalination as a means of utilizing abundantly available seawater resources. Integrated energy efficiency evaluation is a scientific method for the quantitative analysis of energy efficiency based on multiple indicators and is very useful for investment, construction, and scientific decision-making for desalination projects. In this paper, the energy efficiency evaluation of the micro energy network (MEN) of desalination for multi-source and multi-load is studied, and the basic idea of comprehensive energy efficiency evaluation is analyzed. The process includes the use of a MEN model to establish an integrated energy efficiency evaluation index system, taking into consideration energy, equipment, economic, environmental, and social factors. A combined evaluation method considering subjective and objective comprehensive weights for multi-source multi-load desalination MENs is proposed to evaluate the energy efficiency of desalination and from multiple perspectives.

Comprehensive Evaluation Method of Office Building Energy Consumption Based on Improved Multi-index

In view of the imperfection in the selection of energy consumption characteristics and energy conservation evaluation methods, this paper proposes an energy consumption analysis and energy conservation evaluation method suitable for office buildings. Through the analysis of office building energy consumption monitoring layer data, establishing standard of building energy consumption data sets, including office building day by day, month by month, year after year way of energy consumption and heating and cooling is analyzed, and aiming at the problem of building energy efficiency evaluation index weights are difficult to determine the, combined with the feature of energy consumption was proposed to build multiple indexes comprehensive evaluation of energy consumption. Through the example of office building, the evaluation results are verified, which proves that this method can evaluate the energy consumption of buildings reasonably and feasible, and provides a new idea for the comprehensive evaluation of building energy conservation.

Research on energy efficiency management method of AC/DC hybrid distribution system

With the increasingly serious problems of fossil energy crisis and environmental pollution, vigorous development of Distributed Renewable Energy has become an important means of energy structure reform and energy consumption transformation. On the distribution side, AC/DC hybrid distribution system has been widely studied for its advantages of accessing multiple types of energy, satisfying diversification energy demand, realizing multi-energy complementation and improving grid security. The energy efficiency evaluation and management of AC/DC hybrid system are of great guiding significance to the planning and design of AC/DC system. However, traditional energy efficiency management mainly reduces primary energy consumption by saving electricity. For AC/DC systems with multiple distributed energy sources, it is difficult to reflect the efficiency level of the whole system by considering a single technology or a single part of energy efficiency management. Aiming at the characteristics of AC/DC hybrid distribution system, this paper studies the energy efficiency management method of the system. Firstly, combined with energy efficiency evaluation and system economic analysis, energy efficiency evaluation index of AC/DC hybrid distribution system are formulated. Secondly, the energy efficiency management method is studied through the study of adjustable load, transferable load and different types of load overall management method. Then the method of combining power quality and energy efficiency is studied. Finally the interaction between source and load is studied to improve the energy efficiency of the system. The energy efficiency management method proposed in this paper can fully tap the potential of load adjustable and energy saving, improve the comprehensive energy utilization efficiency of the system, which provides a basis for the engineering application of AC/DC hybrid power grid.

Research on Multi-dimensional Energy Efficiency Assessment Technology of RIES

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.

An Energy Efficiency Indicator and Grading of Shell-and-Tube Heat Exchangers

The shell-and-tube heat exchanger is the most commonly used heat exchange equipment in the industry. Whether shell-and-tube heat exchangers are energy-saving is of great significance for the efficient using of energy. Therefore, the corresponding evaluation system and index are needed for evaluating the heat transfer process in the shell-and-tube heat exchanger. In this paper, based on Kern method, the energy efficiency evaluation index of shell-and-tube heat exchanger suitable for oil-water working medium is derived. And the relevant database is used to obtain the overall energy efficiency distribution of the industry, which is subject to the normal distribution, finally according to the overall energy efficiency distribution, the energy efficiency of the shell-and-tube heat exchanger is graded.

Developing and Applying a Ship Operation Energy Efficiency Evaluation Index Using SEEMP: a Case Study of South Korea

The CO2 emission reduction policy of the International Maritime Organization (IMO) recommends that the operation of ships, managed by maritime transport companies, should be energy-efficient. An evaluation method that can determine how successfully a ship implements the energy efficiency plan is proposed in this study. To develop this method, the measures required for energy-efficient ship operations according to the Ship Energy Efficiency Management Plan (SEEMP) operational guidelines were selected. The weights of the selected measures, which indicate how they contribute to the energy-efficient operation of a ship, were derived using a survey based on the analytic hierarchy process (AHP) method. Consequently, using these measures and their weights, a new evaluation method was proposed. This evaluation method was applied to shipping companies in South Korea, and their ship operation energy efficiency indices were derived and compared. This evaluation method will be useful to the government and shipping companies in assessing the energy efficiency of ship operations.

An energy efficiency evaluation method of distributed CCHP system based on attribute theory for optimal investment strategy

As energy exhaustion and environmental pollution become more and more serious, energy efficiency assessment of energy systems plays a crucial role in reducing carbon emissions and improving investment strategy. Considering the difference of the exported energy forms and energy level of distributed cooling, heating and power (CCHP) system, an improved energy efficiency evaluation index system is proposed in this paper, including primary energy ratio, energy saving rate, thermoelectric ratio, relative energy saving rate and exergy efficiency, which provides the critical indicators for the post-evaluation of distributed energy system (DES) project. Base on the attribute theory method, a comprehensive energy efficiency evaluation method of distributed CCHP system is presented, including single index attribute measure, index weight calculation and multi-attribute comprehensive evaluation. In case studies, the conventional index system and the improved index system are evaluated respectively, and the results show that the proposed index system can provide theoretical support for scientific and reasonable post-evaluation of DES project, and assist the investment strategy of distributed CCHP in the DES project.

A novel building energy efficiency evaluation index: Establishment of calculation model and application

In current system of building energy efficiency, the building energy saving rate is calculated based on energy consumption per unit area on a certain past stage. The approach is restricted by the development of economy, progress of energy-saving technologies and climate change. In present work, a novel building energy efficiency evaluation index is developed to represent building energy saving performance. A building model can be first established according to architectural design scheme, current standards and operating conditions. Then, average daily indoor air temperature would be obtained using hourly outdoor air temperature as input conditions, with the one-dimensional unsteady heat transfer model. Finally, the calculation equations of energy saving of envelopes (ΔS) and building energy saving rate (BESR) are derived. In application, a building envelopes trade-off option is proposed and a target building in Western China is employed for case study. The results indicate that, about 19.3% of whole energy achieving indoor human thermal comfort is provided by building envelopes for the target building. The parametric analyses indicate that, BESRs of the standard building model in cold climate zone (2A) are much higher than those in cold climate zone (2B) in China. It is found that, the trade-off option can also be employed to select and optimize insulation materials and layer thicknesses. The approach can provide new thoughts for evaluation of energy saving performance of building envelopes in the design phase.

Migration Oriented Energy Efficiency Evaluation Index for Cloud Computing Center

Cloud computing center energy consumption is enormous, it is important to enhance the energy efficiency of cloud computing industry. In cloud computing, computing tasks can migrate across data centers. At this point, the existing data center energy efficiency evaluation indicators can not reflect the actual energy efficiency of the computing center. Based on the existing energy efficiency evaluation index on the basis of calculation for multi center model is put forward for the migration of cloud computing center energy efficiency evaluation index of CDCeP, and based on this index, put forward by the mobile micro cloud computing center, chase new cloud physics of low cost and high efficiency of migrating Computing Center operation mode, effectively improve the cloud computing the center of the equivalent energy efficiency, reduce emissions.

The evaluation model of the enterprise energy efficiency based on DPSR.

The reasonable evaluation of the enterprise energy efficiency is an important work in order to reduce the energy consumption. In this paper, an effective energy efficiency evaluation index system is proposed based on DPSR (Driving forces-Pressure-State-Response) with the consideration of the actual situation of enterprises. This index system which covers multi-dimensional indexes of the enterprise energy efficiency can reveal the complete causal chain which includes the "driver forces" and "pressure" of the enterprise energy efficiency "state" caused by the internal and external environment, and the ultimate enterprise energy-saving "response" measures. Furthermore, the ANP (Analytic Network Process) and cloud model are used to calculate the weight of each index and evaluate the energy efficiency level. The analysis of BL Company verifies the feasibility of this index system and also provides an effective way to improve the energy efficiency at last.

110 kV通用设计变电站能效评估模型研究

经济的飞速发展离不开电力，而大量变电站的投运所带来的能源消耗问题越来越受到重视，评估变电站的运行管理的能效，从而提高变电站能效水平，对于实现绿色环保变电站的建设意义重大。本文通过对内蒙古东部地区现有的110 kV通用设计变电站的实地调查和测量统计，研究变电站的运行管理方法和电力设备的用能特点，采集反应变电站能耗的相关数据，提出能效评估的指标体系，结合国家行业标准，确定基于层次分析法的各因子在变电站能效中的权重，最后利用模糊评判法对110 kV通用设计变电站能效进行综合评定，从而得到完整的能效评估体系。利用实际测量的变电站能效数据对模型进行验证，证明了其可行性，为110 kV通用设计变电站的能效优化提供了指导。 The rapid development of economy is inseparable from the power, and the energy consumption brought by the operation of a large number of substations attracts more and more attention. It is of great significance to evaluate the energy efficiency of substation operation and management so as to improve the energy efficiency of substations. Based on the investigation and measurement of 110 kV universal design substation in the east of Inner Mongolia, this paper studies the operation and management methods of substation and the energy consumption characteristics of the power equipment, collects the data which reflects energy consumption of the substation and puts forward the energy efficiency evaluation index system. Finally, the energy efficiency of 110 kV universal design substation is evaluated synthetically by fuzzy judgment method, and then a complete energy efficiency evaluation system is obtained by combining the national industry standard and the weight of each factor based on AHP in the energy efficiency of the substation. The feasibility of the model is proved by the actual measured energy efficiency data of the substation, which provides the guidance for the energy efficiency optimization of the 110 kV universal design substation.

Study on Energy Efficiency Evaluation Index System for Fossil-fuel Power Plant

In this paper, evaluation index system with two levels is established to evaluate energy efficiency of fossil-fuel power plant in a comprehensive and objective way, in order to provide detailed methods for energy-saving and emission reduction. The index system includes five indicators at the first level and two indicators at the second level. Principal component analysis (PCA) model is adopted to comprehensively evaluate energy efficiency of fossil-fuel power units. PCA is a relatively objective evaluation method, which can not only determine weights objectively, but also roundly reflect most information from multiple indicators. The method presented in this paper is implemented on seventeen 1000MW thermal power units. The results obtained agree well with the actual situation and those in the references.

An Energy Efficiency Assessment Method Based on Grey Correlation Degree Analysis for Transport Airports

Energy consumption for today's transport airports is a complex system by a number of factors, and the research on energy efficiency assessment methods for transport airports is still in the initial stage at present. Energy efficiency evaluation index system for transport airports has been established. Analytic Hierarchy Process and Grey Correlation Analysis is applied to make a comprehensive evaluation to the energy consumption of transport airports. As a result, the potential for sustainable development of the airports has been dig out and some viable energy-saving measures has been found out.

Ningbo City’s Residential Building Energy Efficiency Evaluation Index System

According to the actual situation in Ningbo, combined with both relevant information from both China's current building energy efficiency standards and that of foreign building's energy efficiency and environmental assessment methods, together established the Ningbo City residential building energy efficiency evaluation index system. Using the AHP application to evaluate, analyze and calculate to determine the weight of the evaluation index.