scholarly journals Anthropogenic impact on the local ecosystems: the main factors

2020 ◽  
Vol 175 ◽  
pp. 06007
Author(s):  
Alla Ovcharenko ◽  
Liparit Badalyan ◽  
Svetlana Kucherenko ◽  
Alexey Lebedev ◽  
Khamzat Gazgireev

The represented study aims to assess the technogenic impact on the human-transformed landscape on the example of one of the Russian Federation regions. The hydrocarbon fuel consumption and carbon dioxide emissions in the local area are proposed to use as the main indicators of anthropogenic impact on the ecosystem. The research accents the neсessity of taking into account the motor vehicles’ negative impacts on the natural environment. The integrated application of suggested criteria allows assessing the actual state of the environment, to trace the correspondences between fuel consumption and the environmental pollution, and to formulate recommendations on the reduction of ecological and economic damage to the ecosystems.

2018 ◽  
Vol 6 (2) ◽  
pp. 285-298
Author(s):  
Cristina Keiko Yamaguchi ◽  
Carlos Roberto Da Silva ◽  
Stéfano Frizzo Stefenon

The growing number of motor vehicles in urban areas has generated negative impacts on costs for users and bus operators due to congestion and the increase in travel time. Furthermore, transport sector is a significant user of energy, especially fuel, and a great responsible for greenhouse emissions. In order to mitigate these externalities, transport companies try to incorporate into their processes innovative tools and best practices in management, like the so-called economic-driving. The economic-driving seeks to reduce fuel consumption, greenhouse emissions and operational costs. This paper aims to present the results of an economic-driving program implemented in a public transport bus company in Brazil, in the period of 2010-2016. The methodologies used were exploratory, descriptive and case study. The results showed a reduction of fuel consumption by 786.336 liters. The analysis of the consumption of brake linings in eleven buses, running the same itineraries by the same drivers, decreased 47.46%. Based on the Embrapa’s methodology for the calculation of greenhouse emissions the company stopped emitting 86,757.36 kilo grams of CO₂ in the atmosphere. In conclusion, the case study confirmed the feasibility of applying economic-driving strategies and the economic and social advantages with the program for the company.


Author(s):  
V.N. Kurdyukov ◽  
◽  
T.V. Lebedeva ◽  

The article considers common classifications of measures to reduce environmentaleconomic damage from motor vehicles. Classification from the point of view of control impact is proposed, which allows to take into account relations between the state and citizens in the field of reduction of negative impact of motor vehicles on the environment. The analysis of the classification made it possible to identify areas of activity for improving the efficiency of management impacts, taking into account the incentives of citizens to comply with the requirements of the legislation and to create conditions for their exceeding. Increasing the efficiency of resource allocation in the Territory will allow the released funds to be allocated to the development of industry, agriculture, education and science.


2021 ◽  
Vol 13 (8) ◽  
pp. 4528
Author(s):  
Olga Lingaitienė ◽  
Juozas Merkevičius ◽  
Vida Davidavičienė

The World Bank, United Nations, the Organization for Economic Cooperation and Development, and others are in line with the governments of countries that are strongly interested in the sustainable development of countries, regions, and enterprises. One of the aspects that affects the indicators and prospects of sustainable development is the efficiency of energy source use. Nationwide reductions in the greenhouse gas emissions of motor vehicles could have a direct effect on ambient temperature and reducing the effects of global warming, which can affect future environmental, societal, and economic development. Significant reductions in fuel consumption can be achieved by increasing the efficiency of use, and the performance, of current cargo vehicles. This aspect is directly related to cargo delivery systems and supply chain efficiency and effectiveness. The article solves the problem of increasing the effectiveness of cargo delivery and proposes a model that would minimize transportation costs that are directly related to fuel consumption, shortening transportation time. The model addresses the problem of a lack of models evaluating the efficiency of cargo to Lithuania that is using several different modes of transportation. For the solution to this problem, the article examines the complexity of the rational use of land and water vehicles depending on the type of cargo transported, the technical capabilities of the vehicles (loading, speed, environmental pollution, fuel consumption, etc.), and the type (cars, railways, ships). The novelty of the findings is based on the availability to select the most appropriate vehicles, on a case-by-case basis, from the available options, depending on their environmental performance and energy efficiency. This model, later in this article, is used for calculations of Lithuanian companies for selecting the most rational vehicle by identifying the most appropriate route, as well as assessing the dynamics of the economic and physical indicators. The model allows for creating dependencies between the main indicators characterizing the transport process—the cost, the time of transport, and the safety, taking into account the dynamics of economic and physical indicators, that lead to a very important issue—reducing the amount of energy required to provide products and services.


2021 ◽  
Vol 3 (3) ◽  
Author(s):  
Markus Kiesenhofer

AbstractHybridization of the drive train in commercial vehicles is a key solution toward meeting the strict future requirements to reduce carbon dioxide emissions within the European Union. In order to decrease fleet consumption a large number of different hybrid systems are already available in series in the passenger car sector. Due to the cheap and powerful 48 volt hybrid components and the lower hazard potential compared to high voltage, future commercial vehicles could also benefit from the 48V technology and contribute to lower fleet fuel consumption. Therefore, a complete 48V mild hybrid system was built on the diesel engine test bench as part of a research project. This paper highlights the utilization of a powerful 48V-motor to propel the coolant pump on a diesel engine of the 13-L commercial vehicle class. Three different drive variants of the coolant pump were implemented and measured on the diesel engine test bench. MATLAB®/Simulink®-simulations were conducted to assess the possible fuel savings in three different driving cycles. This paper provides a summary and interpretation of the measurement and simulation results. The simulation studies predict a decrease of fuel consumption of up to 0.94%. Furthermore, the additional advantages of electrified coolant pumps based on 48V are discussed.


2009 ◽  
Vol 12 (9) ◽  
pp. 88-97
Author(s):  
Tuan Ngoc Le

In HCMC, there are 958 factories in 12 industrial parks – export processing zones (IP-EPZ) (2006), 1,011 large factories, 6,202 small and medium factories out of IP-EPZ with 24 various industries. More than 700 factories operate in field of buying and recycling solid waste. Besides, there are 21 licenced and series of unregistered factories operating in field of collecting, transporting, treating, and burning industrial solid waste - hazardous waste (ISW-HW). There is the survey deployed in 24 districts (HCMC). The scope of that inquiry is 278 factories in IP-EPZ, 96 large factories, 1,142 small and medium factories out of IP-EPZ. The quantity of industrial solid waste is 1,044 tons per day with 12 percent of hazardous waste. After analysing the advantages and disadvantages of 05 methods used for predicting the quantity of ISW-HW, according to the ability of collecting data related in HCMC, the research has compared and chosen the best method. The results are: 1,641 tons per day (2010); 3,196 tons per day (2015); 7,318 tons per day (2020). With more and more ISW-HW, doing overall researches in order to establish the effective ISW-HW management measures in HCMC, minimize the negative impacts to environment and public health.


2019 ◽  
Vol 26 (3) ◽  
pp. 31-38
Author(s):  
Wojciech Gis ◽  
Maciej Gis ◽  
Piotr Wiśniowski ◽  
Mateusz Bednarski

Abstract Limiting emissions of harmful substances is a key task for vehicle manufacturers. Excessive emissions have a negative impact not only on the environment, but also on human life. A significant problem is the emission of nitrogen oxides as well as solid particles, in particular those up to a diameter of 2.5 microns. Carbon dioxide emissions are also a problem. Therefore, work is underway on the use of alternative fuels to power the vehicle engines. The importance of alternative fuels applies to spark ignition engines. The authors of the article have done simulation tests of the Renault K4M 1.6 16v traction engine for emissions for fuels with a volumetric concentration of bioethanol from 10 to 85 percent. The analysis was carried out for mixtures as substitute fuels – without doing any structural changes in the engine's crankshafts. Emission of carbon monoxide, carbon dioxide, hydrocarbons, oxygen at full throttle for selected rotational speeds as well as selected engine performance parameters such as maximum power, torque, hourly and unit fuel consumption were determined. On the basis of the simulation tests performed, the reasonableness of using the tested alternative fuels was determined on the example of the drive unit without affecting its constructions, in terms of e.g. issue. Maximum power, torque, and fuel consumption have also been examined and compared. Thus, the impact of alternative fuels will be determined not only in terms of emissions, but also in terms of impact on the parameters of the power unit.


Author(s):  
JOSÉ ALFREDO JIMÉNEZ GARCÍA

In this paper it is used the experimental design to minimize the travel time of motor vehicles, in one of the most important avenues of Celaya City in Guanajuato, Mexico, by means of optimal synchronization of existing traffic lights. In the optimization process three factors are considered: the traffic lights’ cycle times, the synchrony defined as stepped, parallel and actual, and speed limit, each one with 3 evaluation levels. The response variables to consider are: motor vehicles’ travel time, fuel consumption and greenhouse effect gas (CO2) emissions. The different experiments are performed using the simulation model developed in the PTV-VISSIM software, which represents the vehicle traffic system. The obtained results for the different proposed scenarios allow to find proper levels at which the vehicle traffic system must be operated in order to improve mobility, to reduce contamination rates and decrease the fuel consumption for the different motor vehicles that use the avenue.DOI: http://dx.doi.org/10.4995/CIT2016.2016.4093


2011 ◽  
Vol 317-319 ◽  
pp. 1999-2006
Author(s):  
Yu Wan ◽  
Ai Min Du ◽  
Da Shao ◽  
Guo Qiang Li

According to the boost mathematical model verified by experiments, the valve train of traditional gasoline engine is optimized and improved to achieve extended expansion cycle. The simulation results of extended expansion gasoline engine shows that the extended expansion gasoline engine has a better economic performance, compared to traditional gasoline engines. The average brake special fuel consumption (BSFC) can reduce 22.78 g / kW•h by LIVC, but the negative impacts of extended expansion gasoline engine restrict the potential of extended expansion gasoline engine. This paper analyzes the extended expansion gasoline engine performance under the influence of LIVC, discusses the way to further improve extended expansion gasoline engine performance.


2018 ◽  
Vol 218 ◽  
pp. 04014
Author(s):  
Muhamad Farhan ◽  
Mohamad Ramdhani ◽  
Estananto

Decreasing of petroleum reserve and increasing of fossil fuel consumed lead to an energy crisis. To anticipate that case, it is required for the development of modified motor vehicles to optimize fuel consumption. A modification toward the valve on the throttle body regulating the mixed amount of the incoming gasoline and air into the combustion chamber can be an alternative solution of the case. By changing the valve aperture system which has initially been linier become logarithmic with the gas handle, make the mixture of incoming gasoline and air into the combustion chamber more efficient. In this research Motorcycle Carburettor 110 cc is used. The result of the research shows that the fuel consumption can be optimized to 37% lower consumption compared to normal mode.


Forests ◽  
2020 ◽  
Vol 11 (2) ◽  
pp. 175
Author(s):  
Xueting Sun ◽  
Qiang Xu ◽  
Youqing Luo

Sirex noctilio, the Sirex woodwasp, is an invasive pest that causes significant economic damage to native and commercial conifer stands through the introduction of a fungal wood decay pathogen. We combined the latitudes and longitudes of S. noctilio distribution points with historical climate data to predict its potential global distribution using a maximum entropy model implemented in the Maxent software. The annual mean temperature, the mean temperature of the warmest quarter, and the precipitation of the wettest month were important meteorological factors that affected the predictions, probably because they have a strong effect on the development of S. noctilio. Our predictions cover the most recent occurrence sites of S. noctilio in China. We predict that suitable habitats for S. noctilio are currently concentrated between 30° N to 60° N and 25° S to 55° S on the world map. All continents except for Antarctica contain suitable areas for S. noctilio, and such areas account for approximately 26% of the total area of these six continents. Predictions for 2050 and 2070 show that global climate change will affect the distribution of S. noctilio. With a decrease in carbon dioxide emissions, areas of moderate to high habitat suitability for S. noctilio will increase; with an increase in emissions, these areas will decrease.


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