The article describes the technology of NOx emission abatement by SNCR method. The scope of research included CDF simulations as well as design and construction of the pilot plant and tests of NOx reduction by urea in the plant located in industrial pulverized-coal fired boiler. The key step of research was to determine the appropriate temperature window for the SNCR process. The proposed solution of the location of injection lances in the combustion chamber enabled to achieve over a 30% reduction of NOx. It is possible to achieve higher effectiveness of the proposed SNCR technology and meet the required emission standards via providing prior reduction of NOx to the level of 350 mg/um3 using the primary methods.
Capillary pumps are passive, two-phase heat transport systems that use the capillary pressure in a porous material in an evaporator to force circulation of cooling medium flow. The Capillary Pumped Loop (CPL) has been designed, built and investigated. Pump is destined for cooling of electronic component, which work with maximum temperature about 100°C. Contact surface is 50x50mm. Investigating the static parameters of the pump is the purpose of this paper. The results indicate that a pump takes off 100-200W from the electronic device at 100°C near the surface of the power source.
In this paper, the compact modeling of power electronic devices is presented. Physical modeling using ANSYS is helpful to identify the compact model parameters. Thermographic measurements were applied to modeling validation. Compact models are very easy for computation, so they generate the results fast and with satisfactory accuracy.
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