Existing laundry dryers with heat pumps for the condensation of water vapor from the process air use tubular-finned condensers. The problem with these condensers is that they represent additional thermal resistance between the refrigerant and the air, which negatively impacts energy efficiency. In this master's thesis, we designed a system that can directly condense water vapor in a cold pool of water, which does not represent additional thermal resistance. Furthermore, water has a cleaning property as it can remove fabric particles and microplastics from the process air, which has a positive impact on the environment. For this purpose, we built two experimental setups to test the appropriateness of the direct condensation concept for integration into dryers. As part of the master's thesis, we used analyses with dry and humid process air to check whether the pressure drops, heat transfer efficiency, and the amount of condensed water in the case of direct water condensation are suitable for the conditions in dryers and thus for further prototype development.
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