Very little experimental information is available in the open literature about condensation inside minichannels. Most of the experimental work has been carried out by using the Wilson plot technique. This method is simple to implement because it does not require the direct measurement of the tube wall temperature. However it becomes inaccurate when a small thermal resistance is present on the test side as compared to the opposite (cooling) side, which is actually the case with a multichannel tube at high values of the internal heat transfer coefficient. In fact, in a multi-port tube internal webs work as fins, and their efficiency is close to unity; thus the internal heat transfer area is higher than the external one. In this paper a new technique to measure the heat transfer coefficient during condensation inside a multi-port extruded minichannel tube is presented. Some R134a preliminary data is also reported.
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ASME 2003 1st International Conference on Microchannels and Minichannels
April 24–25, 2003
Rochester, New York, USA
Conference Sponsors:
- Nanotechnology Institute
ISBN:
0-7918-3667-3
PROCEEDINGS PAPER
Experimental Investigation on Condensation Heat Transfer Coefficient Inside Multi-Port Minichannels
A. Cavallini,
A. Cavallini
Universita` di Padova, Padova, Italy
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D. Del Col,
D. Del Col
Universita` di Padova, Padova, Italy
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L. Doretti,
L. Doretti
Universita` di Padova, Padova, Italy
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G. A. Longo,
G. A. Longo
Universita` di Padova, Vicenza, Italy
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L. Rossetto,
L. Rossetto
Universita` di Padova, Padova, Italy
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C. Zilio
C. Zilio
Universita` di Padova, Padova, Italy
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A. Cavallini
Universita` di Padova, Padova, Italy
G. Censi
Universita` di Padova, Padova, Italy
D. Del Col
Universita` di Padova, Padova, Italy
L. Doretti
Universita` di Padova, Padova, Italy
G. A. Longo
Universita` di Padova, Vicenza, Italy
L. Rossetto
Universita` di Padova, Padova, Italy
C. Zilio
Universita` di Padova, Padova, Italy
Paper No:
ICMM2003-1088, pp. 691-698; 8 pages
Published Online:
February 24, 2009
Citation
Cavallini, A, Censi, G, Del Col, D, Doretti, L, Longo, GA, Rossetto, L, & Zilio, C. "Experimental Investigation on Condensation Heat Transfer Coefficient Inside Multi-Port Minichannels." Proceedings of the ASME 2003 1st International Conference on Microchannels and Minichannels. 1st International Conference on Microchannels and Minichannels. Rochester, New York, USA. April 24–25, 2003. pp. 691-698. ASME. https://doi.org/10.1115/ICMM2003-1088
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