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. Modelling and simulation of fluid-flow and heat transfer in the convective zone of a power-generation boiler. Applied Thermal Engineering, Elsevier, 2008, 28 (5-6) AbstractThe convective zone of a power-station boiler is a complex piece of engineering equipment, which comprises a multiplicity of inter-connected heat-exchanging elements. This paper presents a mathematical model of the convective zone, which allows for the calculation of the shell-side ow and the shell-side, tube-side and tube-wall, thermal elds, and of the shell-tube heat-exchange. The model is solved using conventional CFD techniques, in which the individual tubes are treated as sub-grid features. A geometrical model is used to describe the multiplicity of heat-exchanging structures, and the interconnections between them.The CFD model is rst validated by comparison with simple heat-exchanger geometries which can be solved with analytical methods, and then applied to an actual 350 MW (e) power-station boiler.

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