This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
R744 HVAC-System for Supplementary Heating - Analysis of Different Set-ups
Technical Paper
2006-01-0163
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
In the last years great progresses have been achieved in the design of efficient engines for automobiles. However, the better the engines become with respect to fuel consumption, the less waste heat is available for a quick heat-up of the passenger compartment. This makes supplementary heaters necessary for a fast warm-up at low ambient temperatures. For this purpose the utilization of the R744 refrigerant cycle seems to be a promising solution. This can be realized by either reversing the refrigerant process to a heat pump cycle with the coolant or the ambient air as the heat source, or by a quite simple hot gas cycle.
The numeric simulation is an important tool for the design and optimization of the thermal management of an automobile. At low ambient temperatures the warmup behavior plays an important role. In this case the use of simulation models which consider the thermal mass of the components and thus the transient behavior is of crucial importance.
This paper describes the numerical simulation of different set-ups of a R744 cycle for supplementary heating. Experimental results built the framework for the verification of the simulation results and a comparison of an air-to-air heat pump to a hot gas cycle.
The systems have been investigated with respect to the system behavior, achievable air temperatures and capacity. Thereby special attention is drawn to the transient behavior of the system.
Recommended Content
| Technical Paper | An Approach for Water Jacket Flow Simulations |
| Technical Paper | Axial Fan Performance Predictions in CFD, Comparison of MRF and Sliding Mesh with Experiments |
| Technical Paper | Combined Condensing Air-Conditioning System |
Authors
Topic
Citation
Martin, K., Lang, G., Rieberer, R., and Hager, J., "R744 HVAC-System for Supplementary Heating - Analysis of Different Set-ups," SAE Technical Paper 2006-01-0163, 2006, https://doi.org/10.4271/2006-01-0163.Also In
References
- Renner, M. Neue Generation von brennstoffbetriebenen Stand- und Zuheizern im PKW 2002
- Feuerecker, G. Schäfer, B. Strauss, T. Auxiliary Heating Sytems of Conventional Heat Pump Type: Technology, Performance and Efficiency Toronto 2005 SAE paper 2005-01-2055
- Kampf, H. Sickelmann, M. Taxis-Reischl, B. Baruschke, W. Feuerecker, G. Raiser, H. Control Technologies to optimze operating performance of R744 climate control systems Brighton/UK 2003
- Vetter, F. Memory, S. Automotive AC/HP Systems using R744 (CO 2 ) Brighton/UK 2003
- Hünemörder, W. Kakehashi. N. Bonn 2003
- Heckt, R. CO 2 Heat Pump - optimized for fuel economy VDA-Wintermeeting Saalfelden 2004
- Hafner, A. Experimental study on heat pump operation of prototype R744 mobile air conditioning system 4th IIR Gustav Lorentzen Conference on Natural Working Fluids Purdue 2000
- Wolf, F. Tessendorf, N. Innovative Components for Additional Heating Systems Karlsruhe 2004
- Hafner, A. Compact Interior Heat Exchangers for CO 2 Mobile Heat Pumping Systems NTNU Norwegian University of Science and Technology 2003
- Schneider, Bunzl Hofhaus, Braun Limperich, Cäsar Arntz, Schröter Specht, Mönkediek Starnberg 2004
- Cullimore, B. Hendricks, T. Design and Transient Simulation of Vehicle Air Conditioning Systems Nashville/TN 2001
- Pfafferott, T. Dynamische Simulation von CO 2 - Kälteprozessen für mobile Anwendungen; Shaker Verlag 2005
- Adiprasito, B. Simulation des instationären Verhaltens einer PKW-Klimaanlage mit CO 2 als Kältemittel 12 346 1998
- Martin, K. Lang, G. Rieberer, R. PKW Kälte- & Zuheizanlage mit CO 2 als Kältemittel - Mess- und Simulationsergebnisse 2004
- Martin, K. Lang, G. Rieberer, R. Mobile HVACSystem with CO 2 as refrigerant - Simulations and Measurements Toronto 2005 SAE paper 2005-01-2023
- Software Tool for Vehicle Heat Management Optimization MAGNA POWERTRAIN Engineering Center Steyr GmbH & Co KG Austria http://www.kuli.at