Abstract
This paper presents an analysis of energy efficiency performance in the automotive industry from evidence of Germany and Colombia in order to show important features in energy use between countries with the different income between 1998 and 2007. We found that the automotive industry improved its energy efficiency in each country. In order to understand the driving forces behind these trends, the concept of the production function is used to obtain the elasticities of substitutions and the relationships between several variables and energy efficiency performance in German and Colombian motor vehicle industries. In both countries, we found that the variables of energy prices and sizes of companies each have a positive influence on the efficiency of the gross production/energy ratio. These results show that, in the motor vehicle industry, energy efficiency performance depends on different factors. Hence, variables such as energy prices, energy taxes, economies of scale and technology changes have played a crucial role in the improvements in productivity and rational energy use.




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Notes
The European Parliament supported the European Commission’s call for mandatory reductions in energy use across the EU and, in so doing, gave a needed push to rationalise to energy use in Europe.
The report notes that if existing legislation (e.g., on the energy performance of buildings, combined heat and power, eco-design, emissions trading and energy end-use efficiency) was fully implemented, the EU would already be halfway to meeting its target of reducing energy use by 20% by the year 2020, in line with the Commission's Energy Efficiency Action Plan.
ISEC classifies data according to the kind of economic activity; German and Colombian statistical data are within this classification. The automotive industry is comprised of the manufacture of motor vehicles for transporting people or goods (341), manufacture of trailers and semi-trailers (342) and parts and accessories (343).
These factories are CCA, (Compañía Colombiana Automortriz-Colombian Automotive Company, which assembles Mazda and Mitsubishi pick-ups), General Motors-Colmotores (assembles Chevrolet) and Sofasa (assembles Renault and Toyota). In bodywork, the monopoly is held by Monoblock (assembles chassis for Mercedes Benz).
See “Appendix” for more details on data.
WRI (1987) showed that in developed countries, a strategy to improve energy efficiency was the shift in the structure of energy sources from lower end-use efficiency fuels to higher end-use efficiency fuels.
This includes finished and semi-finished components. Approximately 8,000–10,000 different parts are assembled into approximately 100 major motor vehicle components, including suspension systems, transmissions and radiators (EPA 2003).
Economies of scale refer to the decreased per unit cost as output increases. More clearly, the initial investment of capital is diffused (spread) over an increasing number of units of output, and therefore, the marginal cost of producing a good or service decreases as production increases of scale).
The automation in of motor vehicle manufacture is concentrated in the movement of cars along working stations, where coachwork is cut and welded.
The IEA, in its report tracking Industrial Energy Efficiency and CO2 Emissions (2007), shows that improvements in energy efficiency generated a decrease in CO2 emissions in the industrial sector.
The main investments made by the motor vehicle industry to improve energy efficiency are focused in technology applications for use of waste heat, heat recovery systems, life-cycle assessments of energy consumption during processing and distribution, energy recovery on-site or off-site, natural energy of groundwater cooling, production of electricity and heat from hydrogen using fuel cell technology, cogeneration and biomass and photovoltaic cells (Sustainability Report 2006).
Assemblers and suppliers develop parallel networks across the world generating initiatives for optimally integrating the quality management interfaces at the various stages of the supply chain or at a technical level achieving important improvements in the production process with principles for sustainable development (Humphrey and Memedovic 2003).
The most important motor vehicle assemblies require certification in different management systems according to key suppliers or normal suppliers. Likewise, assembly companies, together with their suppliers, offer technical assistance, seminars, conferences, second party auditing, requests of certification and others.
This variable was measured for the German automotive industry by taking into account VDA and sustainable report, and in the Colombian case as the percentage of plastic bought by this industry that is reported in the manufacturing survey.
Steel guarantees structural integrity and the ability to maintain dimensional geometry throughout the manufacturing process.
The Colombian industrial sector pays a 20% contribution on the Service Provision Cost, which is designed to cover the subsidies granted to the users with lower incomes.
The use of recycled materials is important in this sector but especially in Europe because EU legislation (Directive 2000/53/EC) will require as from 2015 that only five percent of an automobile’s weight may be brought to landfill.
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Acknowledgments
The author would like to thank Dr. Wolfgang Irrek and Alexander Cotte for their helpful suggestions and comments. The author is grateful for the support provided by the Wuppertal Institute, German Academic Exchange Service (DAAD) and the University of La Salle. Any remaining errors are the responsibility of the author.
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Appendix
Appendix
See Table 4.
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Pardo Martínez, C.I. Energy efficiency in the automotive industry evidence from Germany and Colombia. Environ Dev Sustain 13, 367–383 (2011). https://doi.org/10.1007/s10668-010-9266-4
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DOI: https://doi.org/10.1007/s10668-010-9266-4

