Dipl.-Ing. Florian Felix Lapp

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Projects

„Investigation of heat transfer coefficients in turbine cavities under wet steam conditions“
Funded by AG-Turbo, Project Number: 03ET7092I

The research project investigates the heat transfer in the side chambers of steam turbines under wet steam conditions. The prediction of the thermal behaviour during dynamic driving processes, such as start-up and shutdown, is important for the gap design of the entire turbine train as well as the mechanical design of the housing. The gap design also has a considerable influence on the efficiency and defines, among other things, the maximum flexibility of the entire power plant during dynamic driving processes in the partial load range. The main challenge in determining the heat transfer coefficients is the correct recording and physical description of the condensation and evaporation processes. Currently used correlations do not take these processes into account, or only very inadequately.

“Heat Transfer Reduction at Turbine Casing Parts”
(HEATRED; Project Number: FVV 1438)

The project aims to reduce the high thermal stresses during start-up and load point variations in turbomachines.
The temperature difference across the inner casing reaches up to 300 K.  Due to the changing energy market, these thermal stresses occur more and more frequently. Therefore, a metallic mesh is investigated to reduce the thermal gradients in the machines. The steam stagnates in the pockets of the metallic mesh, serving as an insulation.
The advantage of this approach to the optimisation of turbomachinery is distinguished by the increase of the average durability of the machines and its applicability to steam turbines, gas turbines and turbochargers. Therefore, this is a low-cost opportunity for heat reduction

Other

• Responsible for the testrig "EMMA"
• Contact person for the Moodle course rooms