Policies for eliminating low-efficiency production capacities and improving energy efficiency of energy-intensive industries in China

2014 ◽  
Vol 39 ◽  
pp. 312-326 ◽  
Author(s):  
Li Li ◽  
Jianjun Wang ◽  
Zhongfu Tan ◽  
Xinquan Ge ◽  
Jian Zhang ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Low Efficiency ◽  
Production Capacities ◽  
Energy Intensive Industries

scholarly journals ANÁLISE DE EFICIÊNCIA ENERGÉTICA EM INSTITUIÇÕES DE ENSINO SUPERIOR MULTICAMPI E UMA NOVA PROPOSTA DE ROTULAGEM AMBIENTAL

2020 ◽  
pp. 1-19
Author(s):  
Osvaldo Augusto Vasconcelos de Oliveira Lopes Da Silva ◽  
José Machado Moita Neto ◽  
Marcos Antônio Tavares Lira
Keyword(s):  
Energy Efficiency ◽  
Management Strategies ◽  
Relative Energy ◽  
Administrative Management ◽  
Environmental Labeling ◽  
Performance Indexes ◽  
Environmental Management Strategies ◽  
Low Efficiency ◽  
Environmental Labels

The expansion of Brazilian higher education institutions (HEIs) organized in multicampi structures brought a significant complexity to the academic and administrative management. In this context, environmental management strategies become quite relevant, especially when considering the low effectiveness of the Brazilian Labeling Program (BLP) for the classification of buildings in practice. The main objective of the present paper is to evaluate the BLP efficacy as applied to HEI buildings, aiming to develop a new environmental labeling model for multicampi HEIs. For this purpose, the BLP was applied to the labeling of Instituto Federal de Educação, Ciência e Tecnologia do Piauí (IFPI), employing data obtained from electricity bills between 2016 and 2018. The energy diagnosis was performed considering distinct indicators,performance indexes, levels and rankings of relative energy efficiency, from which energy efficiency labels could be developed. The results allow the verification of the low efficiency of the BLP, especially in the environmental labeling of HEIs. From the detailed analysis of bills, it is possible to develop environmental labels inspired by the BLP, resulting in a different approach. A novel type-II environmental labeling methodology is then introduced based on the breakdown of electricity bills and statistical methods.

The Environmental-adjusted Energy Efficiency of China’s Construction Industry: A Three-stage Undesirable SBM-DEA Model

2021 ◽  
Author(s):  
Yufeng Chen ◽  
Lihua Ma ◽  
Zhitao Zhu
Keyword(s):  
Energy Efficiency ◽  
Construction Industry ◽  
Building Materials ◽  
External Environment ◽  
High Energy ◽  
Management Level ◽  
Dea Model ◽  
Improve Energy Efficiency ◽  
Low Efficiency ◽  
Pillar Industry

Abstract Construction industry is a pillar industry of China's national economy but its problems of high energy consumption, high pollution and low energy efficiency is increasingly prominent. The study on the energy efficiency of construction industry is of great significance for improving development quality and achieving the goal of energy saving and emission reduction. In this paper, a three-stage undesirable SBM-DEA model was employed to measure the energy efficiency in construction industry during 2005 -2016. The CO2 directly emitted by the construction industry and indirectly emitted in the production of building materials were used as the undesirable output and the three-stage framework was employed to analyze and eliminate the influence of external environment. The empirical results showed that low efficiency of management in the construction industry is an important factor leading to the low level of energy efficiency in China’s construction industry. For the energy efficiency value before and after adjustment, the “high-high” provinces has made full use of the superior external environment by their high management level, while the “high-low” provinces needs to fully realize the potential in promoting energy efficiency of its external environment by improving its own management of construction industry. On the contrary, the “low-high” provinces need to improve the external environment to ease its restrictions on the level of management in the construction industry. Environmental factors and management level should be considered simultaneously for different provinces to improve energy efficiency of construction industry.

Ball Passage and Impeller Types Do Not Characterize the Functional Performance of a Sewage Pump

2020 ◽  
Author(s):  
David Konstantin Tilcher ◽  
Michael Pöhler ◽  
Paul Uwe Thamsen
Keyword(s):  
Energy Efficiency ◽  
System Dynamics ◽  
Functional Performance ◽  
Objective Assessment ◽  
Test Procedure ◽  
Energy Requirements ◽  
Fluid System ◽  
Dual Channel ◽  
Low Efficiency ◽  
Impeller Geometry

Abstract During the development of sewage pumps their functionality and efficiency have been continuously improved. Different impeller types have been developed; types to reduce clogging, types for associated maintenance during the various stages of the wastewater transport system, and types to increase the efficiency of the pumps. In the current market, energy requirements and efficiency play an increasingly important role. The design of pump impellers with the aim of improving efficiency may increase the susceptibility of clogging. So far there is no test describing both the energy efficiency and the wastewater pumping functionality. Operators can only describe in tenders, a desired efficiency and the indication of plausible experience with respect to the impeller geometry: the impeller shape and the ball passage. It is generally assumed that the susceptibility of clogging can be derived from the impeller shape and the ball passage (or freely passable space). Under this assumption, the vortex impeller should have the lowest susceptibility to clogging. With single and dual-channel impellers, accordingly, the largest possible ball passage points to a low susceptibility of clogging. Both, the hydraulically disadvantageous form of the vortex impeller and an enlargement of the ball passages beyond the hydraulic requirements leads to a significant reduction of efficiency. Generally, it is inferred from these circumstances that clog-free pumps are associated with low efficiency. This assumption, which is also found in the literature, requires a uniform test procedure for the objective assessment of the clogging behavior of sewage pumps. Such a test did not exist. At the Chair of fluid system dynamics, TU Berlin a test stand was developed to examine such assumptions to investigate the functionality and the clogging behavior of sewage pumps. More than 30 different wastewater pumps were tested in this procedure. The results may suggest a correlation between the susceptibility to clogging and the shape of the impeller or ball passage of various sewage pumps. Based on investigations already carried out at the Chair of fluid system dynamics, TU Berlin, the following conclusions are drawn from the measurements: • the superordinate impeller form (Vortex, Channel, etc.) gives no evidence about the susceptibility to blockages, • the ball passage does not indicate the susceptibility to blockages. From these observations it can be deduced: • a sewage pump with an appropriate efficiency may have a low susceptibility to clogging. It can therefore be concluded that the ball passage and the type of impeller are not appropriate parameters to characterize the functional performance of a sewage pump.

scholarly journals A fuzzy-rule-based packet reproduction routing for sensor networks

2018 ◽  
Vol 14 (4) ◽  
pp. 155014771877401 ◽  
Author(s):  
Jinhuan Zhang ◽  
Anfeng Liu ◽  
Peng Hu ◽  
Jun Long
Keyword(s):  
Energy Efficiency ◽  
Data Transmission ◽  
Fuzzy Inference ◽  
Network Reliability ◽  
Data Gathering ◽  
Fuzzy Rule ◽  
High Energy ◽  
Transport Delay ◽  
Reliable Routing ◽  
Low Efficiency

It is a major challenge to transfer target sensing data efficiently to sink in Internet of things. The low-efficiency data transmission can cause low quality of service. To realize the emergent detection and periodic data gathering, the sensed data should be transferred to the sink efficiently and quickly. Recently, there are many related studies. However, there are few researches taking energy efficiency, transport delay, and network reliability into comprehensive consideration. In this article, a novel adaptive green and reliable routing scheme based on a fuzzy logic system is proposed in consideration of energy efficiency, end-to-end transport delay, and network transmission reliability. The key idea of the proposed scheme is to generate different number of renewed packet copies after certain steps according to the fuzzy inference. The fuzzy inference reflects the knowledge that the nodes in the region far to the sink and with more remaining energy initiate and transmit more packet copies concurrently by multiple routing paths to ensure the success rate of data transmission, whereas less. Thus, the high energy efficiency and low latency are obtained for data collection. Our analysis and simulation results show that adaptive green and reliable routing is more superior than the existing scheme.

scholarly journals Energy Efficiency and Carbon Emission Impact on Competitiveness in the European Energy Intensive Industries

Energies ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4700
Author(s):  
Andrius Zuoza ◽  
Vaida Pilinkienė
Keyword(s):  
Energy Efficiency ◽  
Carbon Emission ◽  
Energy Intensity ◽  
Export Performance ◽  
Positive Energy ◽  
Energy Prices ◽  
Competitiveness Index ◽  
Industry Competitiveness ◽  
Index Value ◽  
Energy Intensive Industries

Climate change and efforts to mitigate it have given rise to an interest in the relationship between industry competitiveness, energy efficiency, and carbon emissions. A better understanding of this relationship can be essential for economic and environmental decision-makers. This paper presents empirical research evaluating industry competitiveness through the factors of energy efficiency and carbon emission in Europe’s most energy-intensive industries. The designed industry competitiveness measure index consists of seven components, grouped into three equally weighted sub-indexes: export performance, energy, and environmental. The export performance of the industry is described by the industry export growth rate, the share of the industry’s export, and the effects on the industry’s competitiveness of changes in a country’s export. The energy intensity of the industry and energy prices are integrated into the energy sub-index. The environmental sub-index consists of the industry’s emissions intensity, and the ratio of freely allocated allowances and verified emissions indicators. The findings indicate that countries with the highest index value also have a positive energy intensity and carbon emission indicator value. The average index value of each industry gradually reduces to zero, and the standard deviation of the index value shows a diminishing trend throughout all sectors, which implies that competitiveness in all sectors is increasing and that all countries are nearing the industry average. The ANOVA results show that: (1) the competitiveness index value was statistically significantly different in the investigated countries; (2) the competitiveness index value was statistically non-significantly different in the investigated industries; (3) there was a significant effect of the interaction between country and industry on the competitiveness index value. These results suggest that the country itself and industry/country interaction significantly affect the competitiveness index. However, it should be mentioned that industry per se does not substantially affect the competitiveness index score.

scholarly journals Measurement and Analysis of Urban Total Factor Energy Efficiency in China

2021 ◽  
Vol 261 ◽  
pp. 01020
Author(s):  
Feifei Lu ◽  
Yinling Lu ◽  
Na Lei
Keyword(s):  
Energy Efficiency ◽  
Technological Progress ◽  
High Efficiency ◽  
Malmquist Index ◽  
Coastal Areas ◽  
Central China ◽  
Measurement And Analysis ◽  
Urban Energy ◽  
Research Objects ◽  
Low Efficiency

The improvement of urban energy efficiency is of great significance to reduce carbon emissions and achieve China’s goal of carbon peak in 2030. Taking 266 cities as the research objects, the energy efficiency of each city is measured by Super-SBM model. Then the energy efficiency is decomposed by Malmquist index. The results show that: In 2006, the number of cities in high-efficiency areas is small and high efficiency areas are mostly distributed in the northeast and southeast coastal areas. There was a phenomenon of low efficiency areas agglomeration. But in 2017, the number of high-efficiency cities increased significantly. The number of high-efficiency cities in Northeast China increased, the number of high-efficiency cities in Southeast coastal areas decreased, and the number of high-efficiency cities in Central China increased and showed a phenomenon of agglomeration of high-efficiency areas or relatively high efficiency areas. According to the decomposition of urban energy efficiency, technological progress is the main driving force for the improvement of energy efficiency, and the decline of technical efficiency inhibits the improvement of energy efficiency in various cities.

Technological Learning, Energy Efficiency, and CO2Emissions in China's Energy Intensive Industries

2013 ◽  
Author(s):  
Michael T. Rock ◽  
Michael Toman ◽  
Yuanshang Cui ◽  
Kejun Jiang ◽  
Yun Song ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Technological Learning ◽  
Energy Intensive Industries

Energy efficiency benchmarking of energy-intensive industries in Taiwan

2014 ◽  
Vol 77 ◽  
pp. 216-220 ◽  
Author(s):  
David Yih-Liang Chan ◽  
Chi-Feng Huang ◽  
Wei-Chun Lin ◽  
Gui-Bing Hong
Keyword(s):  
Energy Efficiency ◽  
Energy Intensive Industries

Investigation of Energy Efficiency in Force Control of Pneumatic Actuators

2015 ◽  
Author(s):  
Behzad Taheri ◽  
David Case ◽  
Edmond Richer
Keyword(s):  
Energy Efficiency ◽  
Industrial Applications ◽  
Tracking Performance ◽  
Chamber Pressure ◽  
Pneumatic Cylinder ◽  
Real Time Control ◽  
Pneumatic Actuators ◽  
Time Control ◽  
Force Tracking ◽  
Low Efficiency

Pneumatic actuators, due to their unique features, have numerous industrial applications. However, when compared to electrical actuators, one of the major problems of the overall pneumatic system is low-efficiency. Thus it is important to develop control algorithms for force tracking of pneumatic actuators while minimizing the consumed energy. This paper presents three different approaches for force tracking of pneumatic cylinders. A dual-action pneumatic cylinder along with a real-time control platform were used to compare the energy efficiency and force tracking performance of these methods. Experiments with sinusoidal forces reveled that minimizing the chamber pressure gives the best tracking performance and energy efficiency in higher frequencies.

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