A Review of Influential Factors and Evaluation Models of Energy Efficiency in China

2013 ◽  
Vol 734-737 ◽  
pp. 1662-1665 ◽  
Author(s):  
Bin Wang ◽  
Chun You Wu
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Industry Structure ◽  
Influential Factors ◽  
Review Of Literature ◽  
Consumption Structure ◽  
Evaluation Models ◽  
Dea Models ◽  
Major Factors ◽  
Over Time

With a review of literature on influential factors and evaluation models of energy efficiency in China, the research identified industry structure, technology, and energy consumption structure as major factors having effects on energy efficiency. The research discovered that industry structure was the leading factor contributing to energy efficiency, and there was no agreement on how and to what extent the industry structure impacts energy efficiency. Researches also indicated that the improvement of energy consumption structure enhanced energy efficiency. Technology innovation generally improved energy efficiency, but the effect may fluctuate over time. Latest studies tend to apply total-factor analysis incorporating more factors into inputs and outputs when measuring energy efficiency. A review indicated that DEA models were more practical technique when addressing total-factor energy efficiency.

Indicators and Methodologies of Energy Efficiency in China

2013 ◽  
Vol 275-277 ◽  
pp. 2683-2688
Author(s):  
Bin Wang ◽  
Chun You Wu
Keyword(s):  
Energy Efficiency ◽  
Great Difficulty ◽  
Review Of Literature ◽  
Evaluation Models ◽  
Dea Models ◽  
Practical Model ◽  
Future Work ◽  
Desirable And Undesirable Outputs ◽  
Environmental Outcome ◽  
Output Indicator

The inconsensus in the definition and indicators of energy efficiency has caused great difficulty when evaluating energy efficiency. The research, based on a review of literature focused on China’s energy efficiency, discussed the indicators and evaluation models of energy efficiency. Current studies exhibited many input indicators but output indicator focused on GDP, neglecting the environmental outcome. DEA model is proved to be a more reliable and practical model which can illustrate the multiple elements involved in the use of energy. A common limitation found in the previously advocated DEA models in energy efficiency analysis relates to the absence of undesirable output in the production process. The future work should be done in the framework of total-factor analysis taking account of both desirable and undesirable outputs.

Empirical Research on Energy Consumption Structure and Energy Efficiency - Evidence from Zhejiang Province

2012 ◽  
Vol 524-527 ◽  
pp. 3079-3082
Author(s):  
Di Ping Zhang ◽  
Shuang Shuang He ◽  
Gao Qing Li
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Comparative Analysis ◽  
Statistical Method ◽  
Influence Factors ◽  
Present Situation ◽  
Zhejiang Province ◽  
Elasticity Coefficient ◽  
Consumption Structure ◽  
Policy Suggestions

Taking Zhejiang province as an example, this paper conducted a comparative analysis on the current situation of the energy consumption structure from the vertical and horizontal using the descriptive statistical method. By calculating some indexes such as energy consumption per unit GDP, energy consumption elasticity coefficient, and so on, the study analyzes and evaluates the present situation, trend and influence factors of energy efficiency. Finally, it puts forward some policy suggestions about the optimization of energy consumption structure and energy efficiency.

Research on Energy Efficiency and Environmental Pollution in China: a Simultaneous Equations Approach

2011 ◽  
Vol 361-363 ◽  
pp. 974-977 ◽  
Author(s):  
Ying Nan Dong ◽  
Yu Duo Lu ◽  
Jiao Jiao Yu
Keyword(s):  
Energy Efficiency ◽  
Sustainable Development ◽  
Energy Consumption ◽  
Environmental Pollution ◽  
Energy Intensity ◽  
Industrial Structure ◽  
Economic Loss ◽  
Simultaneous Equations ◽  
Consumption Structure ◽  
The Relationship

This paper examined the relationship between the energy efficiency and the environmental pollution. By using the data of energy intensity and economic loss caused by environmental pollution (ELP) in China from 1989-2009, a simultaneous equations was developed. The result of two-stage OLS estimation suggested that the energy had exerted positive influences on the decreasing of the environmental pollutions. By enhancing the energy efficiency and adjusting the industrial structure and energy consumption structure, China is exploring a road for sustainable development in the energy conservation.

Effects of Energy Prices on Energy Efficiency in China

2014 ◽  
Vol 962-965 ◽  
pp. 1767-1772
Author(s):  
Zun Ming Ren
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Industrial Structure ◽  
Time Series Data ◽  
Series Data ◽  
Energy Prices ◽  
Electricity Prices ◽  
Consumption Structure ◽  
Integration Test

The paper utilized the co-integration test, error correction model and Granger causality test, and other methods to verify the influence of the coal, oil and electricity prices, industrial and energy consumption structures on China's energy efficiency based on time-series data from 1979 to 2010. Test results show that: there is long-term equilibrium relationship of the energy prices, industrial structure, energy consumption structure and energy efficiency; coal prices, industrial structure and energy consumption structure are the Granger reasons of energy efficiency both in the short and long run; while the oil and electricity prices only constitute the long-term Granger reasons of energy efficiency. Finally, it analyzed the implications of policies of the empirical results and provided some constructive suggestions.

scholarly journals Application of Energy Efficiency in A Company Through A Photovoltaic Energy System on Grid

2020 ◽  
Vol 8 (11) ◽  
pp. 634-645
Author(s):  
Samuel Guimaraes Ferreira ◽  
Livia Da Silva Oliveira ◽  
David Barbosa de Alencar
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Solar Energy ◽  
Energy Demand ◽  
Energy System ◽  
Photovoltaic System ◽  
Technical Feasibility ◽  
Useful Life ◽  
A Company ◽  
Over Time

Energy consumption is a major factor in relation to an organization's costs and expenses, determining the need to apply methods that can minimize or reduce these expenses as much as possible. Having these factors in context, the present work aims to present the technical feasibility of implementing a project that uses solar energy through the on-grid solar system to supply the energy demand of a company. The methodology used was the descriptive, in which several data were collected and documentations were analyzed that supported and justified the elaboration of a photovoltaic project and development of the budget and analysis of the costs of a solar energy system. Through the results obtained, it was possible to arrive at a solar project that would be able to establish the necessary power for the company for a cost of R $ 20,916.96 and a payback of 5 years and 5 months. Thus, it is possible to conclude that the photovoltaic system is viable in its use and application, not only because of the advantages associated with the environment, but taking into account its self-sustainability over time and with a useful life of up to 25 years.

The Least Energy Demand Method as Metric to Evaluate Different Production Levels Based on the Relative Energy Efficiency

2015 ◽  
Vol 805 ◽  
pp. 3-10 ◽  
Author(s):  
Sven Kreitlein ◽  
Isabel Kupfer ◽  
Markus Brandmeier ◽  
Jörg Franke
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Energy Demand ◽  
Minimum Energy ◽  
Relative Energy ◽  
Influential Factors ◽  
Independent Basis ◽  
Production Area ◽  
Calculation System ◽  
Definition Of

This paper presents a calculation system for evaluating the energy efficiency at machine, plant, location, company, and sector level based on the process specific minimum energy demand. The goal is a comparability of the energy efficiency across machines, plants, locations, companies, and sectors through definition of significant key figures. The basis of the derivation of possible saving potentials is the relative energy efficiency (REE). [7] It is determined by the quotient of minimal energy demand and actually measured consumption and requires that the actually measured energy consumption refers to an independent basis of comparison. The step-by-step development of the calculation system, structured in levels, is based on the detailed analysis of all the influential factors of the energy consumption with the help of cause and effect diagrams to calculate the minimally necessary energy demands for the manufacturing process. Furthermore, the described bottom-up approach delivers, ensuing from the process oriented level of perspective, the step-by-step conception of the calculation method. The REE of a level of perspective is calculated on the basis of the REE value of the previous production level as well as according weighting factors. On the basis of the calculation, as well as subsequent measurements within the company, optimization potentials [10] can be clearly described and can lead back to their roots. These optimization potentials are based on exemplary trials presented for a chosen manufacturing chain of the electronics production area.

Based on PCA that Affect China's Energy Efficiency

2013 ◽  
Vol 401-403 ◽  
pp. 2209-2212
Author(s):  
Jin Yu Tian ◽  
Na Zhao
Keyword(s):  
Principal Component Analysis ◽  
Energy Efficiency ◽  
Energy Consumption ◽  
Industrial Structure ◽  
Principal Component ◽  
Component Analysis ◽  
Consumption Structure

Energy consumption scales have been expanding, but energy efficiency is relatively low, and its important to analysis of essential factors that affect China's energy efficiency. In this paper, via principal component analysis, make the overall comparison and evaluation on the situation of China's energy efficiency. Changes in the industrial structure and energy consumption structure are the most important factor affecting energy efficiency.

The Relative Energy Efficiency as Standard for Evaluating the Energy Efficiency of Production Processes Based on the Least Energy Demand

2015 ◽  
Vol 805 ◽  
pp. 11-18 ◽  
Author(s):  
Sven Kreitlein ◽  
Isabel Kupfer ◽  
Matthias Mühlbauer ◽  
Jörg Franke
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Energy Demand ◽  
Manufacturing Industry ◽  
Electric Energy ◽  
Relative Energy ◽  
Influential Factors ◽  
Independent Basis ◽  
Calculation System ◽  
Least Energy

This paper presents a calculation system to evaluate the energy efficiency in the production in general and at the process level more specifically. Its focus lies on the evaluation of the efficiency of the use of electric energy in the manufacturing industry. The basic target is a comparability of the energy efficiency across products through derivation of significant key figures. The basis of a significant evaluation and overarching comparability of the energy efficiency as well as the basis of the derivation of possible saving potentials is the relative energy efficiency (REE). It is determined by the quotient of minimal energy demand and actually measured consumption and requires that the actually measured energy consumption refers to an independent basis of comparison. The step-by-step development of the calculation system is based on the detailed analysis of all influential factors of the energy consumption. The, in this context, developed Least Energy Demand Method enables the determination of energy minima with different bases of comparison as reference values to evaluate the energy efficiency of single parts production.

scholarly journals Study on the Impact of Energy Poverty on Energy Efficiency of Construction Industry: Mediating Role of Energy Consumption Structure

2021 ◽  
Vol 9 ◽  
Author(s):  
Jianhua Zhang ◽  
Yushan Liu ◽  
Weihua Zhang ◽  
Xiangyi Lin
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Construction Industry ◽  
Estimation Methods ◽  
Energy Poverty ◽  
Consumption Structure ◽  
Mediating Role ◽  
Technological Level ◽  
The Impact

In the process of continuously advancing urbanization, the energy efficiency of the construction industry, as a pillar industry of the national economy, has attracted much attention. The imbalance of regional economic development, the difference of regional resource endowment, and the incomplete energy infrastructure in some areas lead to the prominent problem of energy poverty in China. Based on the panel data of 30 provinces and cities from 2008 to 2017, this paper calculates the energy poverty index and the energy efficiency of the construction industry. Using OLS, Tobit, Probit, and other estimation methods, this paper analyzes the internal relationship between energy poverty and the energy efficiency of the construction industry, the mediating role of energy consumption structure, and the moderating effect of technological level and marketization degree. The results show the following: There is a negative correlation between energy poverty and the energy efficiency of the construction industry (Husnain, ENERG POLICY, 2021, 157). The energy consumption structure plays a partial mediating role in the impact of energy poverty on the energy efficiency of the construction industry (Li, CHEM ENG J, 2021, 408). It means that energy poverty inhibits the optimization of the energy consumption structure, and through this process, it also inhibits the improvement of the energy efficiency of the construction industry. The technological level and the degree of marketization play a moderating role in the main effect, which can weaken and strengthen the negative impact of energy poverty on the energy efficiency of the construction industry (Gajdzik, ENERGIES, 2021, 14).

Geographical aspects of the diffusion of passive houses

2013 ◽  
Vol 4 (2) ◽  
pp. 151-156 ◽  
Author(s):  
G. Kozma ◽  
E. Molnár ◽  
K. Czimre ◽  
J. Pénzes
Keyword(s):  
Energy Consumption ◽  
Energy Resources ◽  
Substantial Part ◽  
Renewable Energy Resources ◽  
Passive House ◽  
The Earth ◽  
Passive Houses ◽  
The Individual ◽  
Geographical Locations ◽  
Over Time

Abstract In our days, energy issues belong to the most important problems facing the Earth and the solution may be expected partly from decreasing the amount of the energy used and partly from the increased utilisation of renewable energy resources. A substantial part of energy consumption is related to buildings and includes, inter alia, the use for cooling/heating, lighting and cooking purposes. In the view of the above, special attention has been paid to minimising the energy consumption of buildings since the late 1980s. Within the framework of that, the passive house was created, a building in which the thermal comfort can be achieved solely by postheating or postcooling of the fresh air mass without a need for recirculated air. The aim of the paper is to study the changes in the construction of passive houses over time. In addition, the differences between the geographical locations and the observable peculiarities with regard to the individual building types are also presented.

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