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Heat Pipe Science and Technology, An International Journal

ISSN Print: 2151-7975
ISSN Online: 2151-7991

Archives: Volume 1, 2010 to Volume 8, 2017

Heat Pipe Science and Technology, An International Journal

DOI: 10.1615/HeatPipeScieTech.v5.i1-4.700
pages 603-610

EXPERIMENTAL STUDY OF A LOOP HEAT PIPE SYSTEM FOR AUTOMOTIVE EXHAUST GAS HEAT RECOVERY

Benjamin Reul
Benteler Automotive, An der Talle 27-31, 33102 Paderborn, Germany
Tobias Düpmeier
Benteler Automotive, An der Talle 27-31, 33102 Paderborn, Germany
Peter Stephan
Institute for Technical Thermodynamics, Technische Universität Darmstadt, Alarich-Weiss-Str. 10, 64287 Darmstadt, Germany

ABSTRACT

This paper presents a novel design and experimental study for a Loop Heat Pipe evaporator to be applied as an exhaust heat recovery system in automobiles. The application requires, next to the ability to transport up to several kilowatts of heat, a small size and minimum weight, a fast response and start-up, great reliability and no additional power supply. The presented Loop Heat Pipe evaporator design meets the named requirements. Fundamental experimental studies with several prototypes were carried out. Compensation chamber designs proved its functionality. Tests with a highly transient heat loads were conducted, as well as system start-up tests, and basic parameter changes. Due to the high temperature difference (up to 500K) between the heat source and sink, visualization of system and transport phenomena through thermal imaging and a gauge-glass in the compensation chamber could be applied. Nucleate boiling in the evaporator core, temperature oscillations and the distribution of non-condensable gases were visualized.


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