Energy policies for increased industrial energy efficiency: Evaluation of a local energy programme for manufacturing SMEs

The most extensive action targeting the adoption of energy efficiency measures in small- and medium-sized manufacturing industries in Sweden over the past 15 years was project Highland. This paper presents an evaluation of the first part of this local industrial energy programme, which shows an adoption rate of more than 40% when both measures that have already been implemented and measures that are planned to be implemented are included. A comparison between this programme and another major ongoing programme for the Swedish energy-intensive industry indicates that the approach used in project Highland aimed at small- and medium-sized industries is an effective way to increase energy efficiency in the Swedish industry. The major barriers to energy efficiency among the firms were related to the low priority of the energy efficiency issue.     

Motor systems energy efficiency supply curves: A methodology for assessing the energy efficiency potential of industrial motor systems

Motor-driven equipment accounts for approximately 60% of manufacturing final electricity use worldwide. A major barrier to effective policymaking, and to more global acceptance of the energy efficiency potential in industrial motor systems, is the lack of a transparent methodology for quantifying the magnitude and cost-effectiveness of these energy savings. This paper presents the results of groundbreaking analyses conducted for five countries and one region to begin to address this barrier. Using a combination of expert opinion and available data from the United States, Canada, the European Union, Thailand, Vietnam, and Brazil, bottom-up energy efficiency supply curve models were constructed to estimate the cost-effective electricity efficiency potentials and CO₂ emission reduction for three types of motor systems (compressed air, pumping, and fan) in industry for the selected countries/region. Based on these analyses, the share of cost-effective electricity saving potential of these systems as compared to the total motor system energy use in the base year varies between 27% and 49% for pumping, 21% and 47% for compressed air, and 14% and 46% for fan systems. The total technical saving potential varies between 43% and 57% for pumping, 29% and 56% for compressed air, and 27% and 46% for fan systems.     

Benchmarking the energy use of energy-intensive industries in industrialized and in developing countries

Improved energy efficiency is among the key measures for CO₂ emission abatement in the industry. Energy benchmark curves provide data measured at individual plants and they offer a basis to estimate the sectoral energy efficiency improvement potentials (IP) compared to a best practice technology (BPT) currently in operation worldwide. In this paper, we estimate the BPT energy use of 17 industry sectors based on such curves or energy indicators prepared at country-level. We compare BPT data with current energy use to estimate the IP. According to our analysis, BPT offers improvement potentials of 27 ± 8% worldwide. This is equivalent to 32.5 ± 9.6 EJ (exajoules) of final energy savings worldwide, of which three-quarters can be achieved in developing countries. Due to lack of benchmark curves and limited data availability for developing countries, our results include uncertainties. We used literature data at country-level and international energy statistics to fill data gaps and to develop energy indicators. Quality of these data should be improved and benchmark data needs to be collected for more sectors. By doing so, energy benchmarking could become a key tool to estimate energy saving potentials and energy indicators could serve as strong supplementary methodology.     

End-use energy analysis in the Malaysian industrial sector

The industrial sector is the second largest consumer of energy in Malaysia. In this energy audit, the most important parameters that have been collected are as follows: power rating and operation time of energy-consuming equipments/machineries; fossil fuel and other sources of energy use; production figure; peak and off-peak tariff usage behavior and power factor. These data were then analyzed to investigate the breakdown of end-use equipments/machineries energy use, the peak and off-peak usage behavior, power factor trend and specific energy use. The results of the energy audit showed that the highest electrical energy-using equipment was an electric motor followed by pumps and air compressors. The specific energy use has been estimated and compared with four Indonesian industries and it was found that three Malaysian industries were more efficient than the Indonesian counterpart. The study also found that about 64% electrical energy was used in peak hours by the industries and the average power factor ranged from 0.88 to 0.92. The study also estimated energy and bill savings using highly efficient electrical motors along with the payback period.     

Analysis of the energy intensity evolution in the Brazilian industrial sector—1995 to 2005

This study developed a method to evaluate the evolution of energy intensity in the Brazilian industrial sector from 1995 to 2004. In order to do so, it was necessary to obtain six different measures (indicators) of the sector energy intensity. Considering the concept of energy intensity as the ratio between energy consumption and the level of economic activity, two measures were used for the energy consumption: a thermal (physical) and an economic one. For the level of economic activity, three measures were used: value of production, value of delivered goods and added value. In the Brazilian industrial sector, most of these indicators have behaved in a similar way. In a disaggregated way, energy intensity indicators show a unified direction of its evolution. However, a more elaborate study on the consumption profile of the Brazilian industrial sector and its economical activities indicates the presence of important deviations concerning the annual rate of change in energy intensity. Besides, there is no evident relation between these deviations and the composition of the different indicators of energy intensity.     

Barriers to and drivers for energy efficiency in the Swedish foundry industry

Despite the need for increased industrial energy efficiency, studies indicate that cost-efficient energy conservation measures are not always implemented, explained by the existence of barriers to energy efficiency. This paper investigates the existence of different barriers to and driving forces for the implementation of energy efficiency measures in the energy intensive Swedish foundry industry. The overall results from a questionnaire show that limited access to capital constitutes by far the largest barrier to energy efficiency according to the respondents. A comparison between group-owned and privately owned foundries shows that, except for limited access to capital, they face different high-ranked barriers. While barriers within group owned companies are more related to organizational problems, barriers within private foundries are more related to information problems. This study also found that energy consultants or other actors working with energy issues in foundries are of major importance in overcoming the largest barriers, as the foundries consider them trustworthy. They may thus help the foundries overcome organizational problems such as lack of sub-metering and lack of budget funds by quantifying potential energy efficiency investments. The two, by far, most important drivers were found to be people with real ambition and long-term energy strategies.     

Allocation of energy resources for power generation in India: Business as usual and energy efficiency

This paper deals with MARKAL allocations for various energy sources, in India, for Business As Usual (BAU) scenario and for the case of exploitation of energy saving potential in various sectors of economy. In the BAU scenario, the electrical energy requirement will raise up to 5000 bKwh units per year or 752 GW of installed capacity with major consumers being in the industry, domestic and service sectors. This demand can be met by a mix of coal, hydro, nuclear and wind technologies. Other reneawbles i.e. solar and biomass will start contributing from the year 2040 onwards. By full exploitation of energy saving potential, the annual electrical energy demand gets reduced to 3061 bKwh (or 458 GW), a reduction of 38.9%.The green house gas emissions reduce correspondingly. In this scenario, market allocations for coal, gas and large hydro become stagnant after the year 2015.     

Modelling industrial energy demand in Saudi Arabia

Between 1986 and 2016, industrial energy consumption in Saudi Arabia increased by tenfold, making it one of the largest end-use sectors in the Kingdom. Despite its importance, there appear to be no published econometric studies on aggregate industrial energy demand in Saudi Arabia. We model aggregate industrial energy demand in Saudi Arabia using Harvey’s (1989) Structural Time Series Model, showing that it is both price and income inelastic, with estimated long-run elasticities of −0.34 and 0.60, respectively. The estimated underlying energy demand trend suggests improvements in energy efficiency starting from 2010.Applying decomposition analysis to the estimated econometric equation highlights the prominent roles of the activity effect (the growth in industrial value added) and the structure effect (the shift towards energy-intensive production) in driving industrial energy demand growth. Moreover, the decomposition shows how exogenous factors such as energy efficiency helped mitigate some of that growth, delivering cumulative savings of 6.8 million tonnes of oil equivalent (Mtoe) between 2010 and 2016.Saudi Arabia implemented a broad energy price reform program in 2016, which raised electricity, fuel, and water prices for households and industry. The decomposition results reveal that, holding all else constant, higher industrial energy prices in 2016 reduced the sector’s energy consumption by 6.9 %, a decrease of around 3.0 Mtoe. Saudi policymakers could therefore build on the current policy of energy price reform and energy efficiency standards to mitigate the rate of growth of industrial energy consumption, increase economic efficiency, and maintain industrial sector competitiveness.     

企业能源统计的现状与分析

介绍了企业能源统计的现状,阐明企业能源统计是企业和政府进行节能管理的重要手段,能源统计是能源管理的基础.强调通过完善企业的能源统计管理工作,建立能源数据中心及能源信息化对当前的节能工作具有重要意义.     

A model for improving energy efficiency in industrial motor system using multicriteria analysis

In the last years, several policies have been proposed by governments and global institutions in order to improve the efficient use of energy in industries worldwide. However, projects in industrial motor systems require new approach, mainly in decision making area, considering the organizational barriers for energy efficiency. Despite the wide application, multicriteria methods remain unexplored in industrial motor systems until now. This paper proposes a multicriteria model using the PROMETHEE II method, with the aim of ranking alternatives for induction motors replacement. A comparative analysis of the model, applied to a Brazilian industry, has shown that multicriteria analysis presents better performance on energy saving as well as return on investments than single criterion. The paper strongly recommends the dissemination of multicriteria decision aiding as a policy to support the decision makers in industries and to improve energy efficiency in electric motor systems.     

A method of identifying and weighting indicators of energy efficiency assessment in Chinese residential buildings

This paper describes a method of identifying and weighting indicators for assessing the energy efficiency of residential buildings in China. A list of indicators of energy efficiency assessment in residential buildings in the hot summer and cold winter zone in China has been proposed, which supplies an important reference for policy makings in energy efficiency assessment in buildings. The research method applies a wide-ranging literature review and a questionnaire survey involving experts in the field. The group analytic hierarchy process (group AHP) has been used to weight the identified indicators. The size of survey samples are sufficient to support the results, which has been validated by consistency estimation. The proposed method could also be extended to develop the weighted indicators for other climate zones in China.     

An analysis of energy use efficiency of canola production in Turkey

In this study, a survey and economic analysis regarding the use of input have been performed with canola farmers in the Trakya region of Turkey; survey data were obtained from 100 farmers, face-to-face. The average energy use efficiency is 4.68 and this value increases as farm size increases; according to the results of this study, energy is used more efficiently in large farms. The difference between average input and output energy is 67259.36 (MJ ha⁻¹). The specific energies of small, medium, and large farms are 62584.37, 69836.21, and 74405.43 respectively. The ratio of direct and indirect energy sources are 24.69%, and 75.31% respectively, and the benefit–cost ratio of canola production is 2.09.     

An energy efficiency plan for the Iranian building sub-sector

The objective of this paper is to develop a 25-year least cost plan for energy management in the Iranian building sub-sector. For this purpose, an energy flow optimization from the point where the final energy is delivered to consumers, until the useful energy and energy services point is investigated. This will help to select the most economically feasible technologies as well as energy carriers considering all technical and social constraints. Based on the optimization results, absorption cooling for the regions where natural gas network is available, grades A and B evaporative coolers and air conditioners for those areas where there is no gas service, gas fired heating systems, wall insulation, double-glazed windows, equipments and appliances with highest energy labelling grade and compact and non-compact fluorescent lamps are among the selections. The results of the sensitivity analysis indicates that if the cost of natural gas network development to the regions where there is no gas will result in the tripling rate of the actual cost of the natural gas, in those areas, the priority should be still given to the consumption of gas. The proposed energy efficiency plan results in 27%, 54% and 10% saving in energy consumption, energy cost and investment cost, respectively.     

Towards cooperative policy approaches in China—Drivers for voluntary agreements on industrial energy efficiency in Nanjing

Energy efficiency is a national priority for China as rapid energy consumption growth aggravates its greenhouse gas emissions, local air pollution and energy scarcity. In the 1990s, a large number of voluntary agreements emerged in industrialised countries in order to improve industrial energy efficiency. These experiences are now taken into account in China. This article analyses the drivers for voluntary agreements on industrial energy efficiency in China, based on a case study of three enterprises in Nanjing, Jiangsu Province. Furthermore, the article reviews the institutional set-up of energy policy and investigates the pertaining policy culture. From the findings, conclusions are drawn on the role of voluntary agreements within China's larger policy context. We conclude that opposed to avoiding stricter regulation, voluntary agreements in Nanjing are reinterpreted in view of more stringent national provisions on energy efficiency in the 11th Five Year Plan. Hence, agreements have evolved into an implementation tool of national policy at the local level. For industry, another major driver for participation was identified as improving its relations with local authorities. Voluntary agreements showed to have the potential to overcome traditional constraints of implementing top–down policies at the local level in China.     

Policy issues in improving energy efficiency

Today many urgent policy issues need addressing within the overall topic of improving energy efficiency. Also, they need to be addressed at many levels in society, each level possibly requiring a different approach: the overall national economy; the national energy sector; the energy utility; and the energy consumer. This article looks at some of the more important common issues, which apply at all levels, and gives some options on how these issues might be addressed.     

Monitoring changes in economy-wide energy efficiency: From energy–GDP ratio to composite efficiency index

Since the 1973 world oil crisis, monitoring trends in energy efficiency at the economy-wide level has been an important component of energy strategy in many countries. To support this effort, various energy efficiency-related indicators have been developed. We examine some classical indicators which are often found in national and international energy studies in the 1970s and 1980s. We then describe the recent developments in using the index decomposition analysis to give an economy-wide composite energy efficiency index based on a bottom-up approach. This composite index is superior to the classical indicators as an economy-wide energy efficiency measure and has lately been adopted by a growing number of countries for national energy efficiency trend monitoring.     

Factors which influence Nova Scotia farmers in implementing energy efficiency and renewable energy measures

Improvements in energy efficiency and renewable energy use can reduce farm operating costs and reduce greenhouse gas (GHG) emissions. Responses (n=224, representing a 32% response rate) from a mail survey were used to assess use and interest in energy efficient and renewable energy options on farms in Nova Scotia, Canada. Energy efficiency options used the most were behavior, insulation, and lighting. Few farms used renewable energy options. Approximately 78% of farmers indicated an interest in implementing energy efficiency and renewable energy options. Interest varied by farm type and size. Interest increased with farm size. The two main efficiency options of interest were lighting (60.8%) and insulation (43.7%), while wind power development (55.5%) and solar water heating (24.5%) were the main renewable options of interest. Farmers concerned about power and equipment reliability were less likely to be interested in implementing options. Farmers concerned about the environment were more likely to be interested in implementing options. Current use of certain energy efficiency technologies, such as efficient lighting, influenced implementation interest.     

Evaluation of the effectiveness of an energy efficiency program for new home construction in eastern North Carolina

This paper reports on the evaluation of the effectiveness of an energy efficiency program in eastern North Carolina. This subject program is focused on improved construction methods for residential housing. The program incorporates proven energy saving technologies, construction procedures, onsite inspections, and design construction methodologies in new residential construction. The analysis compared the energy usage associated with the houses built in conjunction with the energy efficiency program (test group) with similar new residential construction unrelated to the program (control group). Several statistical methods were employed to establish differences between the energy efficiency program participants and the control group. The analysis provides significant support for the effectiveness of this energy efficiency program and supports the suitability of similar efforts for inclusion in plans for renewable energy offsets and energy efficiency standards.     

Potential energy savings and environmental impact by implementing energy efficiency standard for household refrigerators in China

With the rapid economic growth and improvement in standard of living, Chinese people are employing more and more household appliances to make their living convenient and comfortable, of which refrigerators are indispensable. Because refrigerators operate continuously irrespective of seasons and regions, the total electricity consumption of refrigerators is huge and consequently causes severe energy-related environmental issues. China has been paying more and more attention to this and issued a national energy efficiency standard, GB12021.2-2003, for refrigerators. This paper first describes the standard briefly. Then it develops a mathematic model to evaluate the potential energy savings and environmental impacts of the standard. The estimated results indicate implementing the standard will save large energy, as well as benefit greatly to environment. Thus, it is very necessary to implement energy efficiency standard for refrigerators in China.     

Study in industrial applications of solar energy and the range of its utilization in Jordan

The objective of this research is to encourage the utilization of industrial solar energy in the Arab world and especially in Jordan, which has a sunny weather for most of the year. From his experiments on the Rankine cycle utilizing solar energy for the period between 1871 and 1884, the scientist John Ericson suggested that international relationships in the future will change to the benefit of those countries having continuous solar energy. Jordan nearly does not have a huge amount of oil, natural gas and uranium fields, but it has a huge amount of solar energy available most of the year. This research is a review of the industrial applications of solar energy and their development, which may be useful for the development of military equipment and for economical purposes. This study also shows that the Jordanian government should encourage research centers to do more serious steps towards the utilization of industrial solar energy.