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Acid rain can bring a lot of damage to the ecological environment of the earth and social economy of human. Studies show that acid rain is harmful to soil, waters, forest, buildings and scenic spots. It not only brings heavy economic loss, but also affects the survival and development of human severely. The SO2 in the atmosphere is the leading source of acid rain. Now People pay more and more attention...
From the angle of the traditional energy assessment, the fuzzy probability theory is applied to appraise the green energy. Firstly, the influential factors of the green energy assessment for energy project are analyzed according to China's national conditions. The factors of energy project are divided into four parts, such as absolute cost, ecological harmony, energy security and sustainability. The...
The reduction of particulate matter (PM) emission from Diesel engines is an important challenge due to their adverse effects on human health and environment. Therefore, Diesel particulate filters (DPF) are used to trap PM in the gas exhaust lines. DPF must be regenerated periodically by burning off the PM deposit in order to prevent high back pressure level. It is well known that Balance Point Temperature...
Nitrogen oxides (NOx) reduction technique is one of the hot topics for Diesel engine developers. In the SCR system, the required urea dosing quantity is calculated from the diesel engine raw emissions, so the estimation of the engine raw emissions is very important,. Because of the complexity and the nonlinearity of the engine model, the estimation results are always not satisfied, especially when...
In this paper, the reaction kinetics of the selective catalytic reduction (SCR) is briefly introduced, and a non-cell mathematical model describing the thermal and chemical process of the SCR catalytic converter is given. Based on the one-cell model, identical SCR cell models can be seriously connected to simulate a real SCR converter performance. Consequently, the SCR catalytic converter model in...
Liquefied Natural Gas (LNG) is being developed as a transportation fuel for transit buses, to lessen the dependency on oil and to reduce greenhouse gas emissions. But LNG is hazardous because of its temperature, the possibility of asphyxiation and of course the fire risk. This paper describes the use of Fluent, a widely-used commercial CFD code, to simulate the dynamics of spills from LNG bus fuel...
Electric vehicle not only is an available solution to energy crisis and environmental pollution, but also meets the demands for fuel economy and emission standard. After discussing the structural features of different types of electric vehicles, this paper proposes several energy management strategies for each type, and looks into the future of electric vehicle development.
Up to now, most studies and evaluation about CCHP (combined cooling, heating and power) pollutant emissions is at steady state and full load of power output, the transient pollutant emissions during micro-turbine startup are neglected without persuasive reasons. In fact, at partial loads and transient processes the pollutant emission characteristics can be very different from rated conditions. It...
In order to solve the problem that the exhaust after-treatment system often works in the failure zones, which is caused by the frequent start and stop of engine of hybrid vehicles, this paper presents a new exhaust after-treatment system which is specially designed for hybrid vehicle. According to the particular circumstances of hybrid vehicles (diesel-electric) and hybrid vehicles (gasoline-electric),...
Solar radiation data is essential to the work of energy planners, engineers and agricultural scientist. In this study, the solar radiation model was developed using the measurements from the 101 solar radiation observation stations in China. The average daily radiation on horizontal surfaces in 621 meteorological stations was estimated by the model with the sunshine hours and geographic information...
In order to study the removal effect of non-thermal plasma (NTP) after-treatment system on diesel engine harmful emissions, a dielectric barrier discharge (DBD) plasma reactor is designed, and the NOx removal effect is studied. The results show that reduce the initial concentration of NO, increase the residual time and decrease the gas flow rate would get a high NO removal efficiency. NO reduction...
China will more firmly embrace green and low-carbon development ideals and step up efforts in saving resources and protecting the ecological environment. Therefore, the green taxation policy is just part of a portfolio of possible policy changes. Under this background, this article summarizes many countries' green taxation policy, and explains the objective of polluter pays principle and the mechanism...
To regard environmental protection renewable energy sources especially wind, has been applied to achieve emission reduction goals. While wind generation does not directly produce air pollutants emission, it causes some changes on thermal power generation scheduling which may lead them to produce more air pollutants emission especially during low and medium energy demand periods. So it seems necessary...
With continuous improvement of grid voltage and increasing deterioration of air pollution, both home and abroad have appeared large-scale power outage to the power system, which caused a huge loss, due to pollution flashover. In this paper the flashover mechanism of polluted insulators and related models are introduced, and influencing factors are analyzed; at the same time, based on the flashover...
Based on reference literature, this paper use DEA Malmquist technology to establish the total factor index model considered the variable returns to scale for evaluating carbon emissions performance and analyzed the results. And then, based on the STIRPAT equation, the paper used provincial panel data to test the main factors of carbon emissions performance in China. All the results showed that: In...
With the constantly changing of global temperatures, the conflict has become increasingly prominent between the limitation of coal, oil, gas and other conventional energy sources and increasing demands. To implement low-carbon economy will become an important strategic choice to dealing with global climate change and achieving sustainable development. So, every country in the world, especially developed...
Combustion of fuel mixing with water steam could reduce fuel consumption and engine emission. Experiment results showed that invented oil-saving device realized fuel and water steam mixing for reducing 20% oil consume and 30% engine emissions when installed in internal-combustion engine. Based on experiment results, mechanism of fuel-saving for oil-saving device was analyzed, and the reason of fuel...
SO3 is a pollutant which is one product of coal fired power plant. Using fixed-bed reactor, test the SO3 remove ability of CaO, Ca(OH)2 and CaCO3 under high temperature, and find out that compared with other two matters, Ca(OH)2 is the best absorbent. Moreover, in order to research the influence of flow rate and temperature on remove efficiency, using Ca(OH)2 as absorbent under different condition,...
It is opinion that climate change on the planet is largely dependent on the increase of greenhouse gases in the atmosphere and that this effect is related largely to human activities that make CO2. Reducing the discharge of CO2 has therefore become a common objective of the international community, including China. There are various actions that are proposed for the reduction of the gas: increased...
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