Details
| Original language | English |
|---|---|
| Pages (from-to) | 1588-1595 |
| Number of pages | 8 |
| Journal | Applied Thermal Engineering |
| Volume | 111 |
| Early online date | 20 May 2016 |
| Publication status | Published - 25 Jan 2017 |
Abstract
A single-blow transient test technique is employed to measure the Colburn j factor versus Reynolds number characteristics of high efficiency compact heat exchanger surfaces having offset and wavy fins. Using the experimental data, the NTU values are estimated for 5 types of fins. The measured data is evaluated using the maximum slope method to obtain the corresponding heat transfer coefficient in terms of Colburn j factor, and then is compared with the available correlations of theoretical steady state CFD model. In this analysis, the effects of non-adiabatic side walls and longitudinal heat conduction on the exit fluid temperature response and NTU values are discussed. The test core pressure drops are also measured, and the pressure drop components of entrance, acceleration, core friction and exit losses are compared with the CFD results.
Keywords
- CFD, Colburn j factor, Compact heat exchangers, Pressure drop, Single-blow testing technique, Wavy and offset fins
ASJC Scopus subject areas
- Energy(all)
- Energy Engineering and Power Technology
- Engineering(all)
- Industrial and Manufacturing Engineering
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In: Applied Thermal Engineering, Vol. 111, 25.01.2017, p. 1588-1595.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - The single-blow transient testing technique for offset and wavy fins of compact plate-fin heat exchangers
AU - Ranganayakulu, C.
AU - Luo, Xing
AU - Kabelac, Stephan
N1 - Funding information: The research visits of the first author C. Ranganayakulu to the Helmut Schmidt University, Hamburg and Leibniz University, Hannover were financed by Alexander von Humboldt Foundation, Germany. The authors acknowledges the use of single-blow test apparatus at Institute for Thermodynamics, Helmut Schmidt University, Hamburg, Germany.
PY - 2017/1/25
Y1 - 2017/1/25
N2 - A single-blow transient test technique is employed to measure the Colburn j factor versus Reynolds number characteristics of high efficiency compact heat exchanger surfaces having offset and wavy fins. Using the experimental data, the NTU values are estimated for 5 types of fins. The measured data is evaluated using the maximum slope method to obtain the corresponding heat transfer coefficient in terms of Colburn j factor, and then is compared with the available correlations of theoretical steady state CFD model. In this analysis, the effects of non-adiabatic side walls and longitudinal heat conduction on the exit fluid temperature response and NTU values are discussed. The test core pressure drops are also measured, and the pressure drop components of entrance, acceleration, core friction and exit losses are compared with the CFD results.
AB - A single-blow transient test technique is employed to measure the Colburn j factor versus Reynolds number characteristics of high efficiency compact heat exchanger surfaces having offset and wavy fins. Using the experimental data, the NTU values are estimated for 5 types of fins. The measured data is evaluated using the maximum slope method to obtain the corresponding heat transfer coefficient in terms of Colburn j factor, and then is compared with the available correlations of theoretical steady state CFD model. In this analysis, the effects of non-adiabatic side walls and longitudinal heat conduction on the exit fluid temperature response and NTU values are discussed. The test core pressure drops are also measured, and the pressure drop components of entrance, acceleration, core friction and exit losses are compared with the CFD results.
KW - CFD
KW - Colburn j factor
KW - Compact heat exchangers
KW - Pressure drop
KW - Single-blow testing technique
KW - Wavy and offset fins
UR - http://www.scopus.com/inward/record.url?scp=84969920254&partnerID=8YFLogxK
U2 - 10.1016/j.applthermaleng.2016.05.118
DO - 10.1016/j.applthermaleng.2016.05.118
M3 - Article
AN - SCOPUS:84969920254
VL - 111
SP - 1588
EP - 1595
JO - Applied Thermal Engineering
JF - Applied Thermal Engineering
SN - 1359-4311
ER -