Small pulverized coal-fired heating boilers are popular in and industrial applications. Recent changes emissions limits forced interest clean-up technologies dedicated for such a boilers, which previously were not included regulations. The paper presents method of designing an Selective Non Catalytic Reduction (SNCR) installation small on the example OP-50 boiler. Among main challenges during technology development adjustment injection lances type, position, operating parameters including...

In many countries located in Central–Eastern Europe, there is a need for heating the autumn and winter seasons. Poland, this has been met over years, mainly through development of centralized systems. The heat sources such systems are based on fossil fuels like coal or gas. New regulations climate concerns forcing transformation existing towards green energy. research presents two scenarios change. first focuses maintaining but increases share renewables supply. This can be realized by...

The article deals with the subject of energy storage. This important issue relates to ongoing transformation toward renewable sources. Liquid Air Energy Storage (LAES) is a mechanical storage technology that suitable for large-scale presents method increase efficiency LAES by coupling it transcritical carbon dioxide cycle. To this end, paper numerical analysis two Kapitza systems CO2 cycle: in parallel and subsequent mode. In both cases, maximizing pressure contributes greater overall...

Non-Newtonian fluids are commonly used in a wide range of industries; one example biogas power plants. Proper measurements and modeling such can be crucial from the design operations point view. Results presented this study covered seven samples three plants (a sewage sludge treatment plant, utilization station plant sugar factory), including mechanically thickened excessive activated (MTEAS), beet pulp (SBP), liquid fruit vegetable waste (FVW), roots (BR) corn (CW); their mixtures were...

Efficiently storing energy on a large scale poses major challenge and one that is growing in importance with the increasing share of renewables mix. The only options at present are either pumped hydro or compressed air storage. One novel alternative to store using liquid air, but this technology not yet fully mature requires substantial research development, including in-depth exergy analysis. This paper presents an analysis Adiabatic Liquid Air Energy Storage (A-LAES) system based...

One serious challenge of energy systems design, wind turbines in particular, is the need to match system operation variable load. This so because efficiency drops at off-design strategy address this for turbine blades and obtain a more consistent over wide load range, varying blade geometry. Predictable morphing reaction conditions has been introduced recently. The concept, derived from fish locomotion, also similarities spoilers ailerons, known reduce flow separation improve performance...

The paper presents an exploratory study based on the use of mixed methods in context conducting user experience experiments. applied model is instantiation a holistic adopted from previous EU research project. design related survey instrument for collecting both quantitative and qualitative data intended to measure resulting mobile app. Besides assessing effectiveness using carrying out studies, main objective this check reliability validity instrument. It also suggest potential improvements...

The study objective was to adjust the hydrodynamic disintegrator dedicated sewage sludge pre-treatment (HDS) work with agricultural substrate. This involved development and implementation of a mathematical model flow via device’s domain. An innovative (HAD—hydrodynamic for agriculture) designed, built, tested based on obtained results. main improvements HDS include shredding knives in order overcome clogging by crushed substrate, application ribs recirculation zone, contributing an...

The objective of this work was to present an overview abrasive technologies with solid carbon dioxide as a blasting medium. These methods can be successfully used for the removal wide range types industrial pollution. article covers literature reports in field examined cleaning mechanisms and manufacturing process dry ice, focusing on structure size product. Having correct understanding these processes is crucial further technological development. Then various configurations dry-ice-blasting...

There are several well-known and widely used industrial cleaning methods in the market today. One of them is dry ice blasting. In this method, moisture-free air compressed, mixed with solid CO2 particles, blasted though a nozzle; process, gas expands, propelling its velocity. The high-speed, two-phase flow cleans by supercooling crushing particles on surface, causing sublimation. As nozzle crucial component system, authors conducted numerical analysis geometry proposed convergent-divergent...

The study attempts to compare the total annual emissions of selected air pollutants emitted during occasional grilling and emission same from small domestic heating installations. For this purpose, in absence any data on processes, tests were carried out consisting measuring concentration exhaust streams two types grills (solid fuel grill powered by charcoal briquette gas liquid propane), using popularly prepared dishes (previously marinated meat raw, seasoned mixed vegetables)....

Two-dimensional CFD modeling of the heat and mass transfer process during sewage sludge drying in a solar dryer The paper presents key assumptions mathematical model which describes phenomena process, as well techniques used for solving this with Fluent computational fluid dynamics (CFD) software. Special attention was paid to implementation boundary conditions on surface, is physical between gaseous phase - air, solid dried matter. Those allow media first second stages. Selection geometry...

Mathematical modelling of the drying process enables predicting results adopted parameters, providing information on course in different conditions. Obtained may be used as a basis for optimisation design and operating regime such system. The paper presents essential assumptions created mathematical model solar sewage sludge system its implementation Ansys Fluent environment. Special attention was paid to solutions equation mass heat transfer dried matter – sludge. proposed solution uses...

The energy storage technologies seem to play the invaluable role in present and future systems. Liquid Natural Gas Energy Storage (LNGES) is idea which derives from Air (LAES). Main change replace air with natural gas. superior function of system gas storage, can be realized no geological requirements. additional feature recovery module, works as unit. This way analyzed become an important point power system. mathematical model proposed paper was applied Aspen Hysys numerical environment....

Until recently, sewage sludge produced in wastewater treatment processes was considered problematic waste. It currently constitutes a valuable substrate for raw materials and energy recovery. One of the methods intensifying resource recovery from is its pretreatment by means disintegration methods. This study presents CFD modelling experimentally investigates use hydrodynamic cavitation rotor operated with various rotational speeds (1500, 2500, 300 rpm) organic compounds, nutrients, energy....

This paper presents a formative measurement model of user experience (UX). The study took place in the context conducting several UX experiments with users mobile cloud-based app called Jaxber higher education institutions Finland and France. applied is an instantiation holistic conceptual created E.U. research project. resulting instantiated was operationalized form survey instrument administered among app. final empirically established reliability, validity, goodness fit suggests that...