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The article offers information on several kitchen products including the Select-A-Size Paper Towels from Bounty, the 30" All Gas Range HR 1124 G burner from Miele, and the Platinum ActionPacs dishwashing detergent from Cascade.

The article evaluates several eco-friendly products including Silk'n Soft bathroom tissue from True Earth Paper Corp., over-dry prevention technology Opti-Dry from UniMac, and Ecoburner from Eco Burner Ltd.

Purpose – The purpose of this paper is to show possible approaches which can be used for modeling complex flow phenomena caused by swirl burners combined with simulating coal combustion process using air- and oxy-combustion technologies. Additionally, the response of exist boiler working parameter on changing the oxidizer composition from air to a mixture of the oxygen and recirculated flue gases is investigated. Moreover, the heat transfer in the superheaters section of the boiler was taken into account by modeling of the heat exchange process between continuum phase and three stages of the steam superheaters. Design/methodology/approach – An accurate solution of the flow field is required in order to predict combustion phenomena correctly for numerical simulations of the industrial pulverized coal (PC) boilers. Nevertheless, it is a very demanding task due to the complicated swirl burner construction and complex character of the flow. The presented simulations were performed using the discrete phase model for tracking particles and combustion phenomena in a dispersed phase, whereas the Eulerian approach was applied for the volatile combustion process modeling in a gaseous phase. Findings – Applying the air- to oxy-combustion technology the temperature in the combustion chamber, decreased for investigated oxidizer compositions. This was caused by the higher heat capacity of flue gases which also influences on the level of the heat flux at the boiler walls. Simulations shows that increasing the O2 concentration to 30 percent of volume base in the oxidizer mixture provided the similar combustion conditions as those for the conventional air firing. Moreover, the evaluated results give a good overview of differences between approaches used for complex swirl burners simulations. Practical implications – Nowadays, the numerical techniques such as computational fluid dynamic (CFD) can be seen as an useful engineering tool for design and processes optimization purposes. The application of the CFD gives a possibility to predict the combustion phenomena in a large industrial PC boiler and investigate the impact of changing the combustion technology from a conventional air firing to oxy-fuel combustion. Originality/value – This paper gives good overview on existing technique, approaches used for modeling PC boiler equipped with complex swirl burners. Additionally, the novelty of this work is application of the heat exchanger model for predicting heat loses in convective section of the boiler. This usually is not taken into account during simulations. The reader can also find basic concept of oxy-combustion technology, and their impact on boiler working conditions. [ABSTRACT FROM AUTHOR]

Purpose Safety improvement and pollutant reduction in many practical combustion systems and especially in aero-gas turbine engines require an adequate understanding of flame ignition and stabilization mechanisms. Improved software and hardware have opened up greater possibilities for translating basic knowledge and the results of experiments into better designs. The present study deals with the large eddy simulation (LES) of an ignition sequence in a conical shaped bluff-body stabilized burner involving a turbulent non-premixed flame. The purpose of this paper is to investigate the impact of spark location on ignition success. Particular attention is paid to the ease of handling of the numerical tool, the computational cost and the accuracy of the results.Design/methodology/approach The discrete particle ignition kernel (DPIK) model is used to capture the ignition kernel dynamics in its early stage of growth after the breakdown period. The ignition model is coupled with two combustion models based on the mixture fraction-progress variable formulation. An infinitely fast chemistry assumption is first done, and the turbulent fluctuations of the progress variable are captured with a bimodal probability density function (PDF) in the line of the Bray–Moss–Libby (BML) model. Thereafter, a finite rate chemistry assumption is considered through the flamelet-generated manifold (FGM) method. In these two assumptions, the classical beta-PDF is used to model the temporal fluctuations of the mixture fraction in the turbulent flow. To model subgrid scale stresses and residual scalars fluxes, the wall-adapting local eddy (WALE) and the eddy diffusivity models are, respectively, used under the low-Mach number assumption.Findings Numerical results of velocity and mixing fields, as well as the ignition sequences, are validated through a comparison with their experimental counterparts. It is found that by coupling the DPIK model with each of the two combustion models implemented in a LES-based solver, the ignition event is reasonably predicted with further improvements provided by the finite rate chemistry assumption. Finally, the spark locations most likely to lead to a complete ignition of the burner are found to be around the shear layer delimiting the central recirculation zone, owing to the presence of a mixture within flammability limits.Research limitations/implications Some discrepancies are found in the radial profiles of the radial velocity and consequently in those of the mixture fraction, owing to a mismatch of the radial velocity at the inlet section of the computational domain. Also, unlike FGM methods, the BML model predicts the overall ignition earlier than suggested by the experiment; this may be related to the overestimation of the reaction rate, especially in the zones such as flame holder wakes which feature high strain rate due to fuel-air mixing.Practical implications This work is adding a contribution for ignition modeling, which is a crucial issue in various combustion systems and especially in aircraft engines. The exclusive use of a commercial computational fluid dynamics (CFD) code widely used by combustion system manufacturers allows a direct application of this simulation approach to other configurations while keeping computing costs at an affordable level.Originality/value This study provides a robust and simple way to address some ignition issues in various spark ignition-based engines, namely, the optimization of engines ignition with affordable computational costs. Based on the promising results obtained in the current work, it would be relevant to extend this simulation approach to spray combustion that is required for aircraft engines because of storage volume constraints. From this standpoint, the simulation approach formulated in the present work is useful to engineers interested in optimizing the engines ignition at the design stage. [ABSTRACT FROM AUTHOR]

The article offers recommendations on how to select industrial burners to ensure a good heat processing application. It includes calculation in burner capacity between minimum and maximum, understand the process details and specific requirements and investigation of ignition process. Also emphasized is the need to contact a burner expert to assure right decision making.

Abstract: This paper investigates the numerical simulation of the aerodynamics of biomass burners operating in small-scale, fixed-grate technologies. The efficiency of these boilers is largely determined by the fluid patterns originated in the combustion chamber, as a consequence of the interaction of primary and secondary inlets. A set of CFD computations have been carried out for a case-study burner, seeking the comparison for the isothermal-flow solutions given by Reynolds Averaged Navier–Stokes equations (RANS) and by Unsteady RANS equations (URANS). The influence of both spatial and temporal discretization is discussed, using the Grid Convergence Index (GCI) based on Richardson extrapolation. The results indicate that RANS solutions are slightly more sensitive to grid parameters, while URANS solutions show a better convergence behavior. Validation has been reasonably achieved by comparing the URANS velocity profiles against experimental measurements. As a consequence, a mathematical tool is now available to support design modifications of the biomass burner, combining simplicity, reliability and economy. [Copyright &y& Elsevier]

Information on several burners and combustion control equipment including the Eclipse Linnox ULE burner from Honeywell Eclipse, the Model MPA 41xx burner control from Karl Dungs Inc. and AdvanTek burners from Fives North American Combustion Inc. is presented.

The article evaluates several burners and combustion control equipment including metal fiber burners for low no emissions from Micron Fiber-Tech Corp., Model MPA 41xx burner control from Karl Dungs Inc., and combustion control system from Webster Combustion Technology.

An introduction is presented in which the editor discusses articles in the issue that includes suspection of chronic traumatic encephalopathy presence in singer Elvis Presley; consideration of energy crisis from 1970 by energy manufacturers; and suggestions for burner-management systems.

The article discusses the use of the Industrial Internet of Things automation technology to help reduce energy use in thermal processing operations. It tells us about existing combustion installations and energy use, use of the Industrial Internet of Things (IIoT). IIoT technology can help control excess combustion and its accessibility.

The article presents suggestions for Gas cooktops. It mentions the types of burners such as wok burners, large burners and simmer burners along with suggestions to clean them. It evaluates gas cooktops including Whirlpool AKT799IXL, Westinghouse WHG645WA and Fisher & Paykel CG905DX1 based on cooking performance score.

The article offers information on the components of thermal oxidizers. The components include fuel, combustion chambers in any shape with different uses, and waste and assist burners which provide proper mixing, distribution, and turbulence in completing the oxidization process. It also discusses air inlet and waste feed system.

The article reports that industrial boilers need to in compliance with Industrial Boiler Maximum Achievable Control Technology (IB MACT) by January 2017 in the U.S. It mentions generally accepted technologies that can be used to reduce acid gas emissions such as hydrochloric acid (HCl), including reducing the chlorine entering the system by reducing the amount of coal fired. It also mentions that fuel switching requires changes to the burners and burner management systems.

The article offers a comparison of industrial burners from various manufacturers including Industrial Combustion LLC, Bloom Engineering Co. Inc., and Thermal Engineering Corp.

An abstract of the article "Low Frequency Beating Instability in a Rijke Burner and Its Active Control" by Fanglong Weng and colleagues is presented.

The article offers information on barometric damper inside a boiler room. It states that barometric damper controls the draft inside a boiler which saves heat and reduces operating costs. It also mentions that excessive draft can cause the burner to overheat in which double doors is required to the buildings due to its risk.