scholarly journals Gini and Entropy Based Spread Indexes for Primary Energy Consumption Efficiency and CO2 Emission

2020 ◽  
Author(s):  
Hellinton H. Takada ◽  
Celma O. Ribeiro ◽  
Oswaldo L. V. Costa ◽  
Julio M. Stern
Keyword(s):  
Energy Consumption ◽  
Co2 Emission ◽  
Fossil Fuels ◽  
Fossil Fuel ◽  
Primary Energy ◽  
Primary Energy Consumption ◽  
Policy Makers ◽  
Entropy Measures ◽  
Key Drivers ◽  
Measures Of Inequality

Primary energy consumption is one of the key drivers of global CO2 emissions that, in turn, heavily depend on the efficiency of involved technologies. Either the improvement in technology efficiency or the expansion of non-fossil fuel consumption require large investments. The planning and financing of such investments, by policy makers or global energy firms, require, in turn, reliable measures of associated global spreads and their evolution in time. In this paper, our main contribution is the introduction of index measures for accessing global spreads (that is, measures of inequality or inhomogeneity in the statistical distribution of a related quantity of interest) of technology efficiency and CO2 emission in primary energy consumption. These indexes are based on the Gini index, as used in economical sciences, and generalised entropy measures. Regarding primary energy sources, we consider petroleum, coal, natural gas and non-fossil fuels. Between our findings, we attest some stable relations in the evolution of global spreads of technology efficiency and CO2 emission, and a positive relation between changes in global spreads of technology efficiency and use of non-fossil fuel.

scholarly journals Gini and Entropy-Based Spread Indexes for Primary Energy Consumption Efficiency and CO2 Emission

Energies ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 4938
Author(s):  
Hellinton H. Takada ◽  
Celma O. Ribeiro ◽  
Oswaldo L. V. Costa ◽  
Julio M. Stern
Keyword(s):  
Energy Consumption ◽  
Co2 Emission ◽  
Fossil Fuels ◽  
Fossil Fuel ◽  
Primary Energy ◽  
Point Of View ◽  
Primary Energy Consumption ◽  
Policy Makers ◽  
Responsible Investment ◽  
Global Spread

Primary energy consumption is one of the key drivers of global CO2 emissions that, in turn, heavily depends on the efficiency of involved technologies. Either improvement in technology efficiency or the expansion of non-fossil fuel consumption requires large investments. The planning and financing of such investments by global policy makers or global energy firms require, in turn, reliable measures of associated global spread and their evolution in time, at least from the point of view of the principles for responsible investment (PRI). In this paper, our main contribution is the introduction of index measures for accessing global spread (that is, measures of inequality or inhomogeneity in the statistical distribution of a related quantity of interest) of technology efficiency and CO2 emission in primary energy consumption. These indexes are based on the Gini index, as used in economical sciences, and generalized entropy measures. Regarding primary energy sources, we consider petroleum, coal, natural gas, and non-fossil fuels. Between our findings, we attest some stable relations in the evolution of global spreads of technology efficiency and CO2 emission and a positive relation between changes in global spread of technology efficiency and use of non-fossil fuel.

scholarly journals Sustainable energy path

2005 ◽  
Vol 9 (3) ◽  
pp. 7-14 ◽  
Author(s):  
Hiromi Yamamoto ◽  
Kenji Yamaji
Keyword(s):  
Energy Consumption ◽  
Co2 Emissions ◽  
Fossil Fuels ◽  
Cost Minimization ◽  
Sustainable Energy ◽  
Energy Systems ◽  
Primary Energy ◽  
Primary Energy Consumption ◽  
Photo Voltaic ◽  
Global Energy Supply

The uses of fossil fuels cause not only the resources exhaustion but also the environmental problems such as global warming. The purposes of this study are to evaluate paths to ward sustainable energy systems and roles of each renewable. In order to realize the purposes, the authors developed the global land use and energy model that figured the global energy supply systems in the future considering the cost minimization. Using the model the authors conducted a simulation in C30R scenario, which is a kind of strict CO2 emission limit scenarios and reduced CO2 emissions by 30% compared with Kyoto protocol forever scenario, and obtained the following results. In C30R scenario bio energy will supply 33% of all the primary energy consumption. How ever, wind and photo voltaic will supply 1.8% and 1.4% of all the primary energy consumption, respectively, because of the limits of power grid stability. The results imply that the strict limits of CO2 emissions are not sufficient to achieve the complete renewable energy systems. In order to use wind and photo voltaic as major energy resources we need not only to reduce the plant costs but also to develop unconventional renewable technologies. .

scholarly journals Clean-energy development in China

2015 ◽  
Vol 2 (4) ◽  
pp. 528-532
Author(s):  
Jane Qiu
Keyword(s):  
Air Pollution ◽  
Energy Consumption ◽  
Fossil Fuels ◽  
Clean Energy ◽  
Associate Editor ◽  
Primary Energy ◽  
Energy Development ◽  
Primary Energy Consumption ◽  
Diverse Backgrounds ◽  
National Science

Abstract In June, China announced its 2030 target to cut its greenhouse-gas emissions per unit of gross domestic product by 60%–65% from 2005 levels. To achieve the goal, it would increase the share of non-fossil fuels as part of its primary energy consumption to 20% by 2030 and aim to peak emissions around the same time. As world's largest carbon emitter, the announcement is widely hailed not only as a strong impetus for the UN climate talks, which are convened in Paris this month, but a solution to the country's unprecedented choking pollution. In a forum chaired by National Science Review's executive associate editor Mu-ming Poo, four panelists from diverse backgrounds discuss how clean-energy development could help China to fight against air pollution and meet its 2030 target, what sorts of policies need to be in place, and what the main challenges are.

scholarly journals Eco House Design: A House Design to Reducing Carbon Dioxide Emission

2019 ◽  
Author(s):  
Tedi Ahmad Bahtiar ◽  
Amalia Nurjannah ◽  
Maryoko Hadi
Keyword(s):  
Carbon Dioxide ◽  
Energy Consumption ◽  
Greenhouse Gas ◽  
Co2 Emission ◽  
Fossil Fuels ◽  
Negative Impact ◽  
Carbon Dioxide Emission ◽  
Primary Energy ◽  
House Design ◽  
The Impact

Until 2016, fossil fuels as primary energy are included in the top three most widely used. The process of combustion of fossil fuels causes the release of tremendous amounts of carbon to the atmosphere. In the atmosphere, carbon turns into carbon dioxide (CO2) or often called greenhouse gas. Greenhouse gas has a negative impact on the environment: direct effects like acid rains, and indirect effects like global warming. In Indonesia, the buildings used 37.8 percent of the total national energy consumption and are directly responsible for 37.8 percent of CO2 emission. This study aims to discuss the impact of reducing energy consumption used by the household on the risk of greenhouse gases. A computer simulation was used to calculate energy consumption in buildings. A conversion method from building energy consumption to the amount of CO2 emission was used to determine the level of reduction of greenhouse gas risk. Some parameters were evaluated, such as building’s material (e.g., roof, wall) and building geometry. It was found that the energy consumption savings were around 66.1 percent and operational CO2 savings were obtained 923 kg/year.

scholarly journals Changing Primary Energy Consumption Due to COVID-19: The Study 20 European Economies

2020 ◽  
Author(s):  
Seyed Reza Mirnezami ◽  
Sajad Rajabi
Keyword(s):  
Energy Consumption ◽  
Supply And Demand ◽  
Primary Energy ◽  
Primary Energy Consumption ◽  
Case Scenario ◽  
Worst Case ◽  
Policy Makers ◽  
Worst Case Scenario ◽  
European Economies ◽  
Demand Patterns

Abstract With the outbreak of the coronavirus in countries around the world, governments have decided to impose restrictions and social distancing. Closures of businesses, and hence changes in supply and demand patterns during this period, have deepened concerns among policy makers. In this article, we investigate the change in primary energy consumption in the 20 European countries that have the highest GDP. To this end, 10 different shock scenarios and its limitations are considered. By implementing these shocks into input-output modelling, changes in primary energy consumption are calculated. The results show that according to the best scenario (rapid and complete economy restoration), Russia with 3.5% and Italy with 2.88% will have the largest decrease, and according to the worst case scenario (explosive exacerbation of disease and complete quarantine), Spain with 14% and Italy with 13% will have the largest reduction in energy consumption. In addition, considering the total changes in primary energy consumption of these 20 countries, according to the best scenario, it will decrease by 1.81% and according to the worst-case scenario, it will decrease by 10.46%. We discuss about possibilities that energy consumption permanently declines.

scholarly journals Potentials and limitations of alternative fuels for diesel engine

2009 ◽  
Vol 13 (3) ◽  
pp. 175-183 ◽  
Author(s):  
Radinko Gligorijevic ◽  
Jeremija Jevtic ◽  
Djuro Borak ◽  
Velimir Petrovic
Keyword(s):  
Energy Consumption ◽  
Alternative Fuels ◽  
Fossil Fuel ◽  
Primary Energy ◽  
Pollutant Emission ◽  
Great Effort ◽  
Primary Energy Consumption ◽  
Transportation Fuels ◽  
2Nd Generation ◽  
Automotive Fuels

The primary energy consumption in the world has increased continuously. The most important primary energy source is oil. The supply of automotive fuels today is based almost entirely on oil, and the demand for liquid transportation fuels worldwide will rise significantly in the next fifty years. Growing energy consumption and decreasing fossil resources are reasons for increasing prices of fossil fuel. Besides limited availability, contribution to greenhouse effect and pollutant emission represent another problem of fossil fuel. Both of these problems can be overcome by increased application of renewable biofuels. Therefore, great effort is made to supplement the primary energy sources by including renewable energies. There are alternative fuels 1st and 2nd generation. Some of them show high potential for reduction of engine out emission. But there are economical and technical barriers when such fuels are applied. This paper shows both advantage and disadvantage of alternative fuels, especially when used for diesel engines.

Saving Primary Energy Consumption Through Exergy Analysis of Combine Distillation and Power Plant

2012 ◽  
Vol 9 (2) ◽  
pp. 65
Author(s):  
Alhassan Salami Tijani ◽  
Nazri Mohammed ◽  
Werner Witt
Keyword(s):  
Energy Consumption ◽  
Power Plant ◽  
Heat Pump ◽  
Heat Recovery ◽  
Energy Savings ◽  
Primary Energy ◽  
Heat Pumps ◽  
Saturated Steam ◽  
Distillation Unit ◽  
Primary Energy Consumption

Industrial heat pumps are heat-recovery systems that allow the temperature ofwaste-heat stream to be increased to a higher, more efficient temperature. Consequently, heat pumps can improve energy efficiency in industrial processes as well as energy savings when conventional passive-heat recovery is not possible. In this paper, possible ways of saving energy in the chemical industry are considered, the objective is to reduce the primary energy (such as coal) consumption of power plant. Particularly the thermodynamic analyses ofintegrating backpressure turbine ofa power plant with distillation units have been considered. Some practical examples such as conventional distillation unit and heat pump are used as a means of reducing primary energy consumption with tangible indications of energy savings. The heat pump distillation is operated via electrical power from the power plant. The exergy efficiency ofthe primary fuel is calculated for different operating range ofthe heat pump distillation. This is then compared with a conventional distillation unit that depends on saturated steam from a power plant as the source of energy. The results obtained show that heat pump distillation is an economic way to save energy if the temperaturedifference between the overhead and the bottom is small. Based on the result, the energy saved by the application of a heat pump distillation is improved compared to conventional distillation unit.

scholarly journals Decarbonization of Residential Building Energy Supply: Impact of Cogeneration System Performance on Energy, Environment, and Economics

Energies ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2538
Author(s):  
Praveen K. Cheekatamarla
Keyword(s):  
Carbon Dioxide ◽  
Power Generation ◽  
Energy Consumption ◽  
Carbon Footprint ◽  
Residential Buildings ◽  
Building Energy ◽  
Primary Energy ◽  
Primary Energy Consumption ◽  
Cogeneration System ◽  
The Impact

Electrical and thermal loads of residential buildings present a unique opportunity for onsite power generation, and concomitant thermal energy generation, storage, and utilization, to decrease primary energy consumption and carbon dioxide intensity. This approach also improves resiliency and ability to address peak load burden effectively. Demand response programs and grid-interactive buildings are also essential to meet the energy needs of the 21st century while addressing climate impact. Given the significance of the scale of building energy consumption, this study investigates how cogeneration systems influence the primary energy consumption and carbon footprint in residential buildings. The impact of onsite power generation capacity, its electrical and thermal efficiency, and its cost, on total primary energy consumption, equivalent carbon dioxide emissions, operating expenditure, and, most importantly, thermal and electrical energy balance, is presented. The conditions at which a cogeneration approach loses its advantage as an energy efficient residential resource are identified as a function of electrical grid’s carbon footprint and primary energy efficiency. Compared to a heat pump heating system with a coefficient of performance (COP) of three, a 0.5 kW cogeneration system with 40% electrical efficiency is shown to lose its environmental benefit if the electrical grid’s carbon dioxide intensity falls below 0.4 kg CO2 per kWh electricity.

scholarly journals Assessment Methodology for Efficiency, CO2-Emissions and Primary Energy Consumption for Refrigeration Technologies in the Industry

2018 ◽  
Vol 882 ◽  
pp. 215-220
Author(s):  
Matthias Koppmann ◽  
Raphael Lechner ◽  
Tom Goßner ◽  
Markus Brautsch
Keyword(s):  
Energy Consumption ◽  
Energy Efficient ◽  
Air Conditioning ◽  
Primary Energy ◽  
Primary Energy Consumption ◽  
Assessment Methodology ◽  
Alternative Technologies ◽  
Overall Efficiency ◽  
Chp System ◽  
The Individual

Process cooling and air conditioning are becoming increasingly important in the industry. Refrigeration is still mostly accomplished with compression chillers, although alternative technologies are available on the market that can be more efficient for specific applications. Within the scope of the project “EffiCool” a technology toolbox is currently being developed, which is intended to assist industrials users in selecting energy efficient and eco-friendly cooling solutions. In order to assess different refrigeration options a consistent methodology was developed. The refrigeration technologies are assessed regarding their efficiency, CO2-emissions and primary energy consumption. For CCHP systems an exergetic allocation method was implemented. Two scenarios with A) a compression chiller and B) an absorption chiller coupled to a natural gas CHP system were calculated exemplarily, showing a greater overall efficiency for the CCHP system, although the individual COP of the chiller is considerably lower.

Performance analysis of a combined cooling, heating, and power system driven by a waste biomass fired Stirling engine

2010 ◽  
Vol 225 (2) ◽  
pp. 420-428 ◽  
Author(s):  
J Harrod ◽  
P J Mago
Keyword(s):  
Energy Consumption ◽  
Natural Gas ◽  
Wood Chip ◽  
Primary Energy ◽  
Stirling Engine ◽  
Primary Energy Consumption ◽  
Operational Cost ◽  
Excess Production ◽  
Prime Movers ◽  
Combined Cooling

Due to the soaring costs and demand of energy in recent years, combined cooling, heating, and power (CCHP) systems have arisen as an alternative to conventional power generation based on their potential to provide reductions in cost, primary energy consumption, and emissions. However, the application of these systems is commonly limited to internal combustion engine prime movers that use natural gas as the primary fuel source. Investigation of more efficient prime movers and renewable fuel applications is an integral part of improving CCHP technology. Therefore, the objective of this study is to analyse the performance of a CCHP system driven by a biomass fired Stirling engine. The study is carried out by considering an hour-by-hour CCHP simulation for a small office building located in Atlanta, Georgia. The hourly thermal and electrical demands for the building were obtained using the EnergyPlus software. Results for burning waste wood chip biomass are compared to results obtained burning natural gas to illustrate the effects of fuel choice and prime mover power output on the overall CCHP system performance. Based on the specified utility rates and including excess production buyback, the results suggest that fuel prices of less than $23/MWh must be maintained for savings in cost compared to the conventional case. In addition, the performance of the CCHP system using the Stirling engine is compared with the conventional system performance. This comparison is based on operational cost and primary energy consumption. When electricity can be sold back to the grid, results indicate that a wood chip fired system yields a potential cost savings of up to 50 per cent and a 20 per cent increase in primary energy consumption as compared with the conventional system. On the other hand, a natural gas fired system is shown to be ineffective for cost and primary energy consumption savings with increases of up to 85 per cent and 24 per cent compared to the conventional case, respectively. The variations in the operational cost and primary energy consumption are also shown to be sensitive to the electricity excess production and buyback rate.

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