Radiative heat transfer is an important mechanism in a class of challenging engineering and research problems. A direct all-to-all treatment of these problems is prohibitively expensive on large core counts due to pervasive allto-all MPI communication. The massive heat transfer problem arising from the next generation of clean coal boilers being modeled by the Uintah framework has radiation as ...

Fouling and slagging are some difficulties for the development of biomass as energy potential and to achieve the targets of renewable energy sources utilization. The proper technique to analyze the influence of fouling in a biomass boiler is to monitorize the evolution of heat absorption in heat transfer equipment. Traditional equation-based monitoring techniques have problems to tackle with th...

In current power station boilers, fuel burns at a low temperature, which results in exergy efficiency. This research combined the second law of t with boiler structure to maximize efficiency 350 MW plant boiler. A three-dimensional simulation combustion process is performed. one-dimensional model then constructed calculate loss, heat transfer and Under principle high-temperature air technologie...

The design of furnaces and boilers for solid fuels is supported increasingly by powerful softwares and ever faster computers. A round-robin over the most important CFD (computational fluid mechanics) models and softwares currently available shows, however, that numerical procedures for particle/turbulence interactions are not (yet) very advanced. Particle/fluid interphase slip is considered, bu...

Future use of coal for power generation in the US depends on technologies being made available to capture and store CO2 emissions from power plants. A key candidate CO2 capture technology is oxy-firing of coal. Application of oxy-firing to existing power plants presents unquantified challenges as the characteristics of oxy-firing compared to airfiring have not been fully determined. This presen...

It has long been recognized that combined heat and power (CHP) generation can achieve higher end-use efficiencies than conventional systems. By generating electricity at the point of use and utilizing the co-produced heat, CHP generators can achieve net efficiencies in excess of 80%. This nearly doubles the efficiency of our current system, in which large centralized power plants provide electr...

Abstract This article discusses the new in Uzbekistan heat recovery technology is leaving flue gas from boilers. achieved by condensation of water vapor therein. An analysis advantages and disadvantages contact surface types. The transfer coefficients condensing exchanger surface. temperature regimes which provide point dew point. limited stresses chimney boiler unit are calculated using utiliz...

This paper presents a coupled heat transfer model for coal-fired boilers that integrates boiler’s fire side computational fluid dynamics (CFD) solution with the steam cycle, and thus, can predict boiler temperatures subject to different design operation conditions. In this model, submodels describing gas-steam exchange each part of heating surfaces are integrated by exchanging iteratively. is s...