Details
| Originalsprache | Englisch |
|---|---|
| Seiten | 2485-2492 |
| Seitenumfang | 8 |
| Publikationsstatus | Veröffentlicht - 2018 |
| Veranstaltung | 16th International Heat Transfer Conference, IHTC 2018 - Beijing, China Dauer: 10 Aug. 2018 → 15 Aug. 2018 |
Konferenz
| Konferenz | 16th International Heat Transfer Conference, IHTC 2018 |
|---|---|
| Land/Gebiet | China |
| Ort | Beijing |
| Zeitraum | 10 Aug. 2018 → 15 Aug. 2018 |
Abstract
Condensation heat transfer coefficients were experimentally investigated on four structured tubes having three-dimensional fin geometries on the outside and helical ribs on the inside of the tubes. Tests were conducted using R-134a at a saturation temperature of 35°C. The outside diameter of the tubes is 19 mm and the length of the test section is 1002 mm. Heat flux and cooling water flow rate are varied in a wide range. Shell-side heat transfer coefficients are obtained from overall heat transfer data and the implementation of commonly used correlations for tube- and shell-side heat transfer. Experimental results for a plain tube are in good agreement with Nußelt film theory. During the tests of the structured tubes, considerable enhancement for shell-side and tube-side heat transfer coefficients are observed as compared to the plain tube. Enhancement factors for condensation heat transfer are ranged from 14.8 to 27.4 at a heat flux of 20 kW/m2. Due to differences in outer fin geometries, significant impact of small scale parameters on condensation performance was identified.
ASJC Scopus Sachgebiete
- Physik und Astronomie (insg.)
- Physik der kondensierten Materie
- Ingenieurwesen (insg.)
- Maschinenbau
- Chemische Verfahrenstechnik (insg.)
- Fließ- und Transferprozesse von Flüssigkeiten
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2018. 2485-2492 Beitrag in 16th International Heat Transfer Conference, IHTC 2018, Beijing, China.
Publikation: Konferenzbeitrag › Paper › Forschung › Peer-Review
}
TY - CONF
T1 - Condensation heat transfer of R-134a on single horizontal three-dimensional structured tubes
AU - Steinhoff, Ruben
AU - Luo, X.
AU - Kabelac, Stephan
N1 - Funding Information: The authors acknowledge the support of Cuilong Precision Copper Tube Corp. for providing tube samples. Publisher Copyright: © 2018 International Heat Transfer Conference. All rights reserved. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2018
Y1 - 2018
N2 - Condensation heat transfer coefficients were experimentally investigated on four structured tubes having three-dimensional fin geometries on the outside and helical ribs on the inside of the tubes. Tests were conducted using R-134a at a saturation temperature of 35°C. The outside diameter of the tubes is 19 mm and the length of the test section is 1002 mm. Heat flux and cooling water flow rate are varied in a wide range. Shell-side heat transfer coefficients are obtained from overall heat transfer data and the implementation of commonly used correlations for tube- and shell-side heat transfer. Experimental results for a plain tube are in good agreement with Nußelt film theory. During the tests of the structured tubes, considerable enhancement for shell-side and tube-side heat transfer coefficients are observed as compared to the plain tube. Enhancement factors for condensation heat transfer are ranged from 14.8 to 27.4 at a heat flux of 20 kW/m2. Due to differences in outer fin geometries, significant impact of small scale parameters on condensation performance was identified.
AB - Condensation heat transfer coefficients were experimentally investigated on four structured tubes having three-dimensional fin geometries on the outside and helical ribs on the inside of the tubes. Tests were conducted using R-134a at a saturation temperature of 35°C. The outside diameter of the tubes is 19 mm and the length of the test section is 1002 mm. Heat flux and cooling water flow rate are varied in a wide range. Shell-side heat transfer coefficients are obtained from overall heat transfer data and the implementation of commonly used correlations for tube- and shell-side heat transfer. Experimental results for a plain tube are in good agreement with Nußelt film theory. During the tests of the structured tubes, considerable enhancement for shell-side and tube-side heat transfer coefficients are observed as compared to the plain tube. Enhancement factors for condensation heat transfer are ranged from 14.8 to 27.4 at a heat flux of 20 kW/m2. Due to differences in outer fin geometries, significant impact of small scale parameters on condensation performance was identified.
KW - Condensation
KW - Experiment
KW - Heat transfer enhancement
KW - R-134a
KW - Structured tube
UR - http://www.scopus.com/inward/record.url?scp=85068314162&partnerID=8YFLogxK
U2 - 10.1615/ihtc16.cod.023874
DO - 10.1615/ihtc16.cod.023874
M3 - Paper
AN - SCOPUS:85068314162
SP - 2485
EP - 2492
T2 - 16th International Heat Transfer Conference, IHTC 2018
Y2 - 10 August 2018 through 15 August 2018
ER -