Heat and Mass Transport
Technical apparates for heat and mass transport
how they appear in power plants, in the chemical industry as well as
in many further applications need interfaces to absorb and deliver
heat or mass flows.
To intensificate the processes a very efficient coupling and recoupling of the heat and mass flows is requiered.
This can enhance the energy efficiency of the processes or the applications can be built more lightly, more compactly and in conclusion more cost-efficiently.
A basic understanding of the common processes' mechanisms of heat and mass transport can give important refenrences to improve them.
The heat driven chillers that are investigated/ determined at the department are explicit examples for the impact of heat and mass transport.
All relevant incoming and outcoming energy flows are delivered by heat flows.
The technical work plays an underpart. In addition to that the inner mass transport illustrates a determing factor in the process quality and therefore also in the efficiency of the entire facility.
The Departments' main researches mainly deal with phenomenons of phase transition/ phase transformation for example boiling phenomenons of nucleate boiling , coupled heat and mass transport in absorption and desorption activities of absorption chillers or liquefaction activities.
Current Projects Heat and Mass Transport
Alternative Cooling Generation
The employment von room air conditioners is
increasing worldwide. Air conditioners are mostly electrically driven
consequently the electric power consumption increases as well as
Furthermore a network load is about to appear, especially in the hot season.
We deal mainly with absorption chillers (adsorption pairs: water/LiBr, ammonium/water, water/ sulfuric acid and water/ionic liquids) that are driven thermally instead of eletrically.
The operating power in this case is delivered by solar-cells (solar cooling generation/solar chilling) or by waste heat from block heat power plants, heat and power plants (Combined heat, power and cooling)or industry processes.
In this area we study fundamentals (absorption mechanisms, heat and mass transport), develop and test components, draw up prototypes and deal with the entire system (monitoring, simulation, optimization).
Further main researches are absorption heat pumps, heat transformators, steam jet chillers, photovoltaic cooling and vortex tubes.
There are drawn up up studies for all our areas of research about state of the art, potentials and feasibility.
Current Projects Alternative Cooling Generation
Energy Storage and Heat Recovery
availability of energy ist the basis of industrial development. Fossil
fuels can be considered as biogenic stored energy which is
transportable and able to store but not available in an endless
quantity. In addition to that its utilization adds to greenhouse
effect. Renewable energies mostly show a lower energy density, a lower
transportability as well as a higher fluctuation in availability.
These facts necessitate an efficient utilization and new methods of
Therefore research in possibilities of heat recovery and energy storage is done at the institute. In this connection process heat that normally is delivered unused to the environment is stored intermediately directly or indirectly afterwards.
One example for the direct utilization decoupled residual heat are technically driven chillers. The spectrum of the determined
research subjects reaches from heat exchanger optimization to chemical energy storage. Examplary
for this purpose stands the so called Honigmann-Prozess at which a sorption process is used to storage thermal and mechanical energy.
???? Schlangensatz???? Aufzählung oder gehört alles zum Honigmannprozess???
- hydrothermal carbonization
- to generate carbon from biomass
- utilization exhaust-gas energy to cool the charge air in line with the project "Heat2Cool".
Current Projects Energy Storage and Heat Recovery