Aktuelle Forschungsprojekte

Image Energy efficiency consulting - cogeneration systems
Image Optimizing HVAC operation with machine learning
Image Investigation of materials
Image State of system and failure analyses
Image Filter Tests
Image Mass Spectrometer
Image Performance tests of refrigerant compressors
Image Innovative small helium liquefier
Image Electrical components in refrigeration circuits
Image Multifunctional electronic modules for cryogenic applications
Image Development of test methods and test rigs for stationary integrated refrigeration units
Image IO-Scan - Integral measuring optical scanning method
Image Service offer for Leak Detection and Tightness Test
Image Lifetime prediction of hermetic compressor systems
Image High temperature heat pump
Image Thermostatic Expansion Valves

You are here:  Home /  Research and Development

IO-Scan - Integral measuring optical scanning method


02/2022 - 07/2024

M.Sc. Rebekka Grüttner



Development of a photometric measurement method for determining the air exchange rate in indoor areas


  • Cost-effective, real-time assessment of indoor air quality in the form of air exchange rates
  • Verify and optimise the effectiveness of ventilation systems in occupied areas
  • Ability to evaluate aerosol reduction through the interaction of window ventilation, building ventilation system and mobile room air cleaners

Project Objective

  • Self-calibrating measuring system
  • Deviation from previous trace gas measurements should be within 10%.
  • Real-time results can detect and evaluate the influence of changes in the ventilation system during the measurement process
  • Intended measurement depth in the room: 1 m to 50 m

Solution Approach

  • The introduction of mist aerosols into the room air influences the light transmittance to be measured.
  • Transmittance of an air-aerosol mixture and use of measured transmittance to determine air exchange rate
  • Integral real-time optical measurement over individual indoor distances

Your Request

Further Projects - Research and Development


Characterisation of Superconductors in Hydrogen Atmosphere

Are superconductors really compatible with hydrogen?


Corrosion inhibitor for ammonia absorption systems

An alternative to chromium(VI) compounds


Development of a Cryogenic Magnetic Air Separation Unit

Oxygen Enrichment by Applied Cryogenic Magnetohydrodynamics


Brine (water)-water heat pump

Test according DIN EN 14511 and 14825


Air-water heat pumps

Test according DIN EN 14511 and 14825