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Simulations dynamiques d’un système frigorifique à absorption pour une application automobile.

Dynamic simulations of an absorption refrigeration system for automobile application.

Numéro : No 341

Auteurs : PHAN H. T., WIRTZ M., HERGOTT J., BOUDÉHENN F.

Résumé

This study was aimed at evaluating the technological feasibility of an absorption refrigeration system using heat from the exhaust gases to cover the needs of air conditioning in automobiles. In the first step, architecture of a single-stage ammonia-water absorption cycle was designed for a case study with a standard 2.0L gasoline turbo-engine vehicle. Then, a new dynamic model of the absorption cycle was built based on the TIL Modelica library to simulate the transient behaviour of the cycle during start/stop and change in driving regime. The simulation results show two major limitations of the absorption refrigeration: insufficient cold production for low wheel power (urban cycle); and slow start up compared to a conventional compression system. The dynamic of the absorption cycle is slow enough to make the engine speed fluctuations (including the stop & start function) imperceptible by the users. Analysis of the ammonia mass flow rate in the system exhibits that the inertia of the absorption cycle mainly depends on high-pressure components such as generator and condenser. This study provides some insight to optimize the performance and the dynamic of the absorption refrigeration system for automobile application.

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Pages : 8 p.

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Détails

  • Titre original : Dynamic simulations of an absorption refrigeration system for automobile application.
  • Identifiant de la fiche : 30030110
  • Langues : Anglais
  • Sujet : Technologie
  • Source : 13th IEA Heat Pump Conference 2021: Heat Pumps – Mission for the Green World. Conference proceedings [full papers]
  • Date d'édition : 31/08/2021

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