WAK module packageCalculation of coil type economizers (Extension of former ABHI module package) Program features:The WAK program designs coil type economizers with multiple helical tube bundles. Boilers (forced-flow boilers resp. La Mont boilers), water heaters or thermal oil heaters can be calculated. The standard medium is hot oil on the tube side and flue gas on the shell side. User-specific data for the flue gas can be entered or you may select standard compositions for typical gas, fuel, or solid fuel combustions. |
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Calculation of horizontal or vertical exchanger arrangement is possible. The flow pattern is countercurrent or cocurrent. The program suggests parallel flow in coils and annulus.
Up to 14 concentric tube baskets with or without a flow directing unit are available in the program. The most inner or most outer basket can touch the shell or can be constructed with a gap to the shell. The tube geometry and tube count in the spirals may be freely specified. With evaporators the necessary diameters of throttles for a stable and regular flow are calculated.
An improved calculation of the flue gas-side heat transfer allows longitudinal pitch ratios from 1,0 on (the tubes are are narrowly coiled and welded. In the calculation, the effect of radiation from the flue gas is taken into consideration
The maximum film temperature is calculated for the spiral with the lowest heat transfer coefficient and for the section with the highest temperature level.
The LAMO module (for evaporation) included in the WAK program provides the graphical display of e.g course of heat transfer, heat flux, and wall temperature.
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