Strömungsoptimierung eines Luft-Luft Wärmetauschers

Abstract

Based on an existing design for an air-to-air heat exchanger for highly particulate exhaust gases on an industrial scale, a flow-optimized design is developed which meets the requirements specified in this Thesis. CFD simulations show that the optimized design has a homogeneous mass flow distribution between the individual passes and within a pass, for both the offgas and the cooling air. The maximum allowed outlet temperature in the offgas of 300 ◦C can be significantly undercut with a value of 244 ◦C. A redundant coolingair supply is provided, while at the same time the pressure loss within the cooling air is capped at 1351 P a. This is a significant undercut, when compared to the maximum allowed pressure loss of 1500 P a. The coefficient of performance was increased to 70, 87 and the heat flux density to 5, 88 kW m2 , from previously 70, 34 and 5, 83 kW m2 , respectively. This demonstrates an overall increase of cooling efficiency, by the design adaptations developed in this thesis.

Datum der Bewilligung	2024
Originalsprache	Deutsch (Österreich)
Betreuer/-in	Franz Maier (Betreuer*in)