Skip to Main content Skip to Navigation

Etude des machines à absorption pour la valorisation de la chaleur fatale basse température

Abstract : This thesis aims at studying the low temperature waste heat recovery (less than 100°C) by the use of absorption machines, mainly absorption heat transformers (AHT) to generate heat at a higher temperature, and absorption refrigeration cycles (ARC) to generate chilling power. The performances of absorption machines are expressed according to the temperatures and the COPs which they can reach. These two parameters depend on the cycle configuration, the components used and the refrigerant-absorbent pair of fluids circulating in the machine. The main objective of this work is a new generation of AHT which can produce heat with a difference in temperature compared to the available heat source (heat rejection) of at least 50°C. For the ARC, a new generation of cycles capable of producing chilling power at temperatures lower than -20°C is aimed.The results obtained represent a major progress in the absorption cycles field. The objectives set for this work of low temperature heat recovery, up to 45°C, by making available high temperature heat (above 120°C) and low temperature (below -20°C) have been achieved. This represents a minimal temperature difference between the waste heat and the useful heat of 75°C. The use of ejectors with specific working fluids allowed the development of a new generation of absorption cycles.
Complete list of metadata

Cited literature [177 references]  Display  Hide  Download
Contributor : ABES STAR :  Contact
Submitted on : Wednesday, April 25, 2018 - 4:31:06 PM
Last modification on : Monday, June 27, 2022 - 3:03:44 AM
Long-term archiving on: : Thursday, September 20, 2018 - 2:13:46 AM


Version validated by the jury (STAR)


  • HAL Id : tel-01778402, version 1


Michel Wakim. Etude des machines à absorption pour la valorisation de la chaleur fatale basse température. Thermique [physics.class-ph]. Université Paris sciences et lettres, 2017. Français. ⟨NNT : 2017PSLEM037⟩. ⟨tel-01778402⟩



Record views


Files downloads