Current research projects

Image Performance tests of condensing units
Image Investigation according to DIN EN ISO 14903
Image Ice Slurry Generation
Image Corrosion inhibitor for ammonia absorption systems
Image IO-Scan - Integral measuring optical scanning method
Image Test rigs for refrigeration and heat pump technology
Image Swirl-free on the move...
Image Influenced melting point of water by magnetic field
Image Software for technical building equipment
Image Heat2Power
Image Low Temperature Measuring Service
Image Electrochemical decontamination of electrically conducting surfaces „EDeKo II“
Image Software modules
Image Measurement of insulated packaging
Image Thermostatic Expansion Valves
Image High Capacity Pulse Tube Cooler

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Thermal engines

Industry

Dipl.-Ing. Gunar Schroeder

+49-351-4081-5129

Power Generation from Waste Heat

Principally every refrigeration process could also work as a power cycle. In this way an energy consuming machine which provides a temperature below the ambient temperature turns into a heat engine operating between the ambient and a higher temperature. In a first step cryogenic refrigeration cycles are used reversely as heat engines, as they can handle large temperature gradients.

Thermal engines similar to the Stirling cycles

In cooperation with FOX exhaust systems, the ILK Dresden has developed a waste heat recovery system. The thermal engine dedicated for the car exhaust gas system was now presented at the International Motor Show (IAA, 2011) in Frankfurt for the first time.

With the aid of a model the functionality was demonstrated impressively.

The prototype will deliver an electrical power of 2 kW, at an exhaust gas temperature between 300 and 500°C (570 to 930°F). Currently optimization work, mainly related to generator, is underway. The figure below shows the illustration of the thermal engine in an exhaust tract.

Thermal engines related to other thermodynamic cycles

With several industrial partners heat engines are under development, which operate according to the following thermodynamic cycles:

  • closed and open Joule process
  • valve less Ericsson process

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Further Projects

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Brine (water)-water heat pump

Test according DIN EN 14511 and 14825

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High temperature heat pump

Using waste heat from industrial processes

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Air-water heat pumps

Test according DIN EN 14511 and 14825

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Micro heat exchangers in refrigeration

3D-printing of micro heat exchangers

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Electrochemical decontamination of electrically conducting surfaces „EDeKo II“

Improvement of sanitary prevention by electrochemical decontamination