Finite Elements Calculations
On special demands to the heat exchangers by loads such as compression, temperature, vibrations as well as the coaction of these loads these effects are calculated by the finite-elements-method. A computer model is compiled on which the operating conditions and operation modes of the equipment are simulated and checked. On the basis of the results the components will be calculated and the construction will be spezified accordingly. These finite-elements inspections are accomplished by a civil engineer office specializing in those calculations.

Flue-gas-recycle - air heat exchanger in 1.4878, 10439 Nm³ flue-gas/h, 700°C/180°C, 2230 kW

Stressanalysis of the tubesheet

Flue-gas air-preheater, 130000 Nm³ flue-gas/h, 232°C/156°C, 4000 kW

Stressanalysis at the outer wall of the heat exchanger in the area of the gasturningchamber

Deformation of the tubesheet according to heat load and internal pressure

Raw-gas clean-gas heat exchanger in 1.4541, 36000 kg raw-gas/h, 270°C/40°C, 1278 m², 26,5 to

Theoretical distribution of temperature in the heat exchanger

Maximum equivalent stresses ( from Mises) according to the heatload and internal pressure

Heat conduction, calculated using a simplified model of one orner of the heat exchanger, seen from the inner side

Flue-gas vapour heat exchanger in 1.4541, 35000 kg flue-gas/h, 650°C/225°C, 5000 kW

Theoretical distribution of temperature in the heat exchanger

Analysis of stresses according to heat load - shown are the separated sidewalls of the heat exchanger

Turbine - exhaust-gas recycle-air heat exchanger, 20037Nm³ Turbine-exhaust-gas/h, 482°C/262°C, 1725 kW

Theoretical distribution of temperature in the heat exchanger

Stressanalysis shown in the distribution of stresses according to internal pressure and heatload

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