One of the different research teams of the Thermodynamics Laboratory of the University of Liège is the THERMOTECHNICS Research Group (leaded by Prof. Philippe. Ngendakumana). The team (established in 2003) is composed by one professor, 2 PhD students, 2 technicians,  1 research engineer and generally 1 visiting professor and 1 research engineer. The  teaching and research activities cover both experimental and numerical approaches and are organized according to the following topics:

  1. Combustion modeling;
  2. Thermo-hydraulic performance of heat exchangers;
  3. Internal combustion engines;
  4. Thermofluid Quantity Measurement.


  • Thermal efficiency improvement of domestic and industrial appliances remains an issue to achieve the targets in the reduction of green house gases emissions for many countries. The research in combustion of hydrocarbons and alternative fuels is performed in the frame of IEA implementing agreement: "Energy Conservation and Emissions Reduction in Combustion (ECERC)" with the financial support of the SPW-DGO4.
  • The Thermodynamics Laboratory has gained a strong experience in testing and modeling of conventional and condensing boilers supplied by fuel oil or natural gas. Simulation models of the thermal performance of boilers have been developed and experimentally validated [More...].
  • Combustion control in household and industrial boilers is also investigated [More...].
  • Feasibility study of flameless oxidation (FLOX) or combustion into a semi-industrial boiler for hot water production (in collaboration with the University of Mons - Belgium). Flameless oxidation  is a low temperature and homogeneous combustion which reduces NOx emissions while keeping the thermal efficiency of the boiler as high as possible [More...].
  • The use of biofuels into combustion systems is also investigated. A study to evaluate the use of the jatropha oil into vaporizing burners has been recently performed [More...].
  • Combustion in rocket engines for the gross (chemical) propulsion.
  • Diesel marine engines fuelled with light or heavy fuel engines.


The Thermodynamics Laboratory owns different test benches to test different kinds of heat exchangers (gas-to-air, gas-to-liquid and liquid - to - liquid) under various operating conditions.

  • Testing and modeling of heat exchangers for automotive vehicles [More...],
  • Development of an integrated air-to-air heat recovery system for residential buildings: GREEN+


Test benches are available to test performance (thermal efficiency and pollutants emissions) of compressed (CI) and spark (SI) ignition  engines. In parallel, the models available in the literature for  the different  strokes (intake, compression, injection, combustion, expansion, exhaust)  are continuously improved according to the technology of ICE available on the market.

  • Modeling of the heat release in the case of multi-injection
  • A test bench for high pressure natural gas injection in ICE is also available. Testing and modeling of the performance (thermal efficiency and pollutants emissions) of CI and  SI internal combustion engines (zero or one -dimensional models),
  • Testing and characterization of high pressure natural gas injectors for ICE: [VARGAL].

Thermofluid Quantity Measurement

The Thermodynamics Laboratory is a member of the "LABNET" (LABoratory NETwork), a group of laboratories working for the improvement of the methodologies used to measure performance (thermal efficiency and pollutants emissions) of domestic boilers and other domestic appliances based on combustion of natural gas, fuel oil, wood, etc..

Use of the IR Thermography in the thermal signature (defaults in insulation, heat demand, …) of residential and commercial buildings.