Details
| Original language | English |
|---|---|
| Qualification | Doctor of Engineering |
| Awarding Institution | |
| Supervised by |
|
| Date of Award | 4 Apr 2022 |
| Place of Publication | Garbsen |
| Print ISBNs | 9783959007023 |
| Electronic ISBNs | 978-3-95900-728-3 |
| Publication status | Published - 2022 |
Abstract
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Garbsen, 2022. 163 p.
Research output: Thesis › Doctoral thesis
}
TY - BOOK
T1 - Experimental investigation and modelling of condensation in micro-structured plate heat exchangers
AU - Wang, Ru
N1 - Doctoral thesis
PY - 2022
Y1 - 2022
N2 - With a micro-structured plate heat exchanger with mixed angles, the heat transfer and pressure drop of pure refrigerants and their mixtures during condensation is presented and investigated. For this purpose, a test rig of a vapor compression refrigeration system and a test bench of visualization were developed and built in the institute of Thermodynamics at the Gottfried Wilhelm Leibniz University of Hannover. Based on the visualization results, the influence of flow patterns on heat transfer and pressure drop is thermodynamically investigated, a new heat transfer model based on flow patterns is developed. The micro-structure improves heat transfer during condensation, new correlations are established for the prediction of quasi-local heat transfer coefficients and two-phase frictional pressure drop, by considering the specific properties of fluids and geometry. The course of the mixtures, together with the results from the literature, confirms that the model for pure refrigerants enables good prediction for azeotropic and near-azeotropic mixtures.
AB - With a micro-structured plate heat exchanger with mixed angles, the heat transfer and pressure drop of pure refrigerants and their mixtures during condensation is presented and investigated. For this purpose, a test rig of a vapor compression refrigeration system and a test bench of visualization were developed and built in the institute of Thermodynamics at the Gottfried Wilhelm Leibniz University of Hannover. Based on the visualization results, the influence of flow patterns on heat transfer and pressure drop is thermodynamically investigated, a new heat transfer model based on flow patterns is developed. The micro-structure improves heat transfer during condensation, new correlations are established for the prediction of quasi-local heat transfer coefficients and two-phase frictional pressure drop, by considering the specific properties of fluids and geometry. The course of the mixtures, together with the results from the literature, confirms that the model for pure refrigerants enables good prediction for azeotropic and near-azeotropic mixtures.
M3 - Doctoral thesis
SN - 9783959007023
T3 - Berichte aus dem Institut für Thermodynamik
CY - Garbsen
ER -