Current research projects

Image High temperature heat pump
Image Panel with indirect evaporative cooling via membrane
Image Micro heat exchangers in refrigeration
Image Development of a Cryogenic Magnetic Air Separation Unit
Image Characterisation of Superconductors in Hydrogen Atmosphere
Image Investigation of materials
Image Measurements on ceiling mounted cooling systems
Image Investigation of coolants
Image Thermostatic Expansion Valves
Image Modular storage system for solar cooling
Image Range of services laboratory analyses
Image Refrigerants, lubricants and mixtures
Image Tensile and compression testing
Image Test rigs for refrigeration and heat pump technology
Image Helium extraction from natural gas
Image Development of test methods and test rigs for stationary integrated refrigeration units

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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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Certifiable connection types in cryogenics

Detachable and permanent connections, adhesive bond / form closure / force closure

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Combined building and system simulation

Scientific analysis of thermodynamic processes in buildings and its systems

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Heat2Power

Refining of fuel cell waste heat

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Reducing the filling quantity

How much refrigerant must be filled?