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Analysis of supplementary heating systems for automobiles based on a R-744 air-conditioning system.
Author(s) : MARTIN K., RIEBERER R.
Summary
A fast warm-up of the passenger compartment is a substantial comfort and safety criterion for automobiles. However, modern high-efficient engines often do not provide enough waste heat at low outside temperatures for fast heating of the interior. This paper describes the analysis of different set-ups of a R-744 circuit for supplementary heating. Experimental investigations built the framework for the verification of the simulation results and a comparison of an air/air heat pump, a coolant/air heat pump and a hot gas cycle. The systems have been investigated with respect to the system performance, air temperatures and heating capacity. Special attention is drawn to the simulation of the refrigerant cycle at transient operating conditions.
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Pages: 2006-2
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Details
- Original title: Analysis of supplementary heating systems for automobiles based on a R-744 air-conditioning system.
- Record ID : 2007-1728
- Languages: English
- Source: 7th IIR-Gustav Lorentzen Conference on Natural Working Fluids (GL2006). Proceedings
- Publication date: 2006/05/29
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Indexing
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Themes:
Heat pumps techniques;
CO2;
Mobile air conditioning - Keywords: Comparison; Car; Transient state; Air-air; Simulation; Heat pump; Modelling; Expérimentation; Transcritical cycle; Air conditioning; Heating; CO2
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