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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...
Denitrification (De-NOx) agents using activated carbon (AC) as the support have a large specific surface area, good pore structure, low reaction temperature and low price, amongst others. In this work, CuO/AC catalysts with coconut AC supported copper were prepared. De-NOx experiments were conducted in a fixed-bed reactor using a simulated flue gas stream to investigate the effects of calcination...
Heat transport has been recognized as a hydrologic tracer to indentify surface water infiltration and the exchange of surface water and groundwater. This paper investigates the heat transport with groundwater movement in coastal aquifers under tidal conditions. The aquifer vertically terminates at coastline with a thin submarine outlet-capping. Firstly, the time averaged analytical solution of tide-induced...
In order to accurately know the temperature field around a fixed anchorage and the heat loss of buried pipe we used the numerical simulation technology to simulate the temperature field in fixed anchorage of buried heating pipes, then, we got the intuitive temperature distribution figure and the size of heat loss. The simulation results indicate the necessity of effective insulation measures for fixed...
Based on the dissolved gases analysis and grey relational theory, a fault diagnosis method for transformers is proposed. Fault diagnosis in transformers has several parameters such as the severity of fault and the kind of fault, a lot of typical fault samples are divided into several sets according to the fault type. The practical data are analyzed using grey relational analysis. The experiment showed...
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...
Natural gas consumption growth rate in Iran over the past decade has been usually over than the world wide consumption. As temperature variation has an inevitable effect on raw material consumption which supplies thermal and cooling energies in different areas of the society so in this research we are going to investigate the temperature effects on different sectors of natural gas consumption such...
The pyrolysis of cornstalk was studied by using Pyris-ITGA thermogravimetric apparatus with the heating rates of 20, 40, 60, 80, 100K/min and final temperature of 1073 K. Through the analysis of TG and DTG, the results show that the pyrolysis process of cornstalk includes four steps: drying, pre-pyrolysis, mainpyrolysis and carbonization; As the heating rate increased, both the maximum pyrolysis rate...
Contact resistance of Gas insulated switchgear (GIS) bus conductor would increase and overheat itself in long-term operation. This paper established mathematical model to figure out temperature distribution of 4kA single-phase GIS bus. Power loss in electromagnetic field was calculated and indirectly coupled to temperature and flow field. Calculation result showed that the temperature distribution...
PPS filter is widely used in Thermal Power Plant Dedusting, the mechanical properties of PPS filter is influenced by the high temperature of flue gas. In this paper, effect of high temperature on PPS filter was studied. The results showed that with increasing temperature, the breaking strength of filter has a downward trend; the fiber of base fabric and surface has great impact on the mechanical properties...
In this paper, moat water source heat pump air-conditioning system is researched.The author field measuremented the temperature, flow and other parameters of Jinan moat water in summer, and determined the main parameters of the water in winter according to the measured data of Jinan moat water in previous years. The mathematical model of moat water source heat pump air-conditioning system is further...
The pulverized coal combustion in O2/CO2 atmosphere is one of the promising new technologies which can reduce the emission of carbon dioxide and NOx. In this study, a three dimensional mathematical multiphase CFD model has been developed to simulate the combustion characteristics of pulverized coal in the atmospheres of O2/CO2. It was observed that the combustion characters of pulverized coal show...
Used Tween-80 as emulsifler, industrial lipase as catalyst to hydrolyze waste oil from restaurants and make mixed fatty acid. We discussed the enzyme concentration, substrate concentration, temperature and time on hydrolysis. Through the experiment, we found that when we used emulsifier which contains 2% oil in the system, we could get the optimal parameter for hydrolysis of waste oil from restaurants...
Pressure and temperature's accurate calculation of the oil-gas multiphase transportation pipeline is the key of the process calculation study, and it has important significance to the production run of pipeline. According to the needs of the engineering application, and based on the data of actual pipeline, this paper amends the key parameters of the pressure drop and temperature drop models, and...
Solar heat receiver is currently one of the important research topics of renewable energy. In present article, experimental measurements and numerical analyses are conducted to investigate the heat transfer performances of high temperature molten salt in spirally grooved solar receiver tube. The molten salt is used as a working medium to study the heat transfer coefficients of spirally grooved solar...
-To overcome the problem of high carbon content in the fly ash of down-fired utility boilers using low-volatility coals, the combustion system of a 660 MWe full-scale down-fired boiler was retrofitted with many items: louver concentrators was adopted, the fuel-lean flow is laid near the wall, the F-tier secondary air is modified with an angle of declination of 20°. Industrial experiments were performed...
Based on elaborating the characteristics of capillary tube air-conditioning system, especially investigated the heat transfer property of this system cooling in summer, and establishes a two-dimensional mathematical model of steady-state heat transfer. In this paper, the Matlab program programmed by a micro-body heat balance method focuses the impact on the ceiling temperature field and the cooling...
Temperature and pressure are important parameters related to energy consumption and safe operation of oil depot. A mathematical model is established from the point of temperature drop and pressure drop during storage and transportation process based on the reasonably simplified physical model of oil depot. Then parameter distributions of each node are obtained by the application of sequential modular...
This paper concerned on the influence of acoustic velocity change on the pulsed electro-acoustic (PEA) space charge measurement. The space charge measurement results of an air gap and low density polyethylene (LDPE) samples have been compared under different temperature respectively. According to the experimental results, it was found that acoustic velocity of test samples changes with the increasing...
The large-diameter flat serpentine finned tube is often used in direct air-cooled condensers. The distribution of the air velocities and the temperatures in the serpentine finned tube were analyzed by using three-dimensional numerical simulation methods. The heat transfer coefficients in finned tubes were obtained, which were subsequently used to fit the relational formulas of the heat transfer coefficients...
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