Heat transfer coefficient and pressure drop during refrigerant R-134a condensation in a plate heat exchanger
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Emila Djordjević
,
Stephan Kabelac
Abstract
The condensation heat transfer coefficient and the two-phase pressure drop of refrigerant R-134a in a vertical plate heat exchanger were investigated experimentally. The area of the plate was divided into several segments along the vertical axis. For each of the segments, local values of the heat transfer coefficient and frictional pressure drop were calculated and presented as a function of the mean vapor quality in the segment. Owing to the thermocouples installed along the plate surface, it was possible to determine the temperature distribution and vapor quality profile inside the plate. The influences of the mass flux and the heat flux on the heat transfer coefficient and the pressure drop were also taken into account and a comparison with previously published experimental data and literature correlations was carried out.
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© 2008 Institute of Chemistry, Slovak Academy of Sciences
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Artikel in diesem Heft
- Photocatalytic reduction of CO2 over TiO2 based catalysts
- Modeling of enzymatic reaction in an airlift reactor using an axial dispersion model
- Hydrolysis of titanium sulphate compounds
- Mathematical modelling of selected characterisation procedures for oil fractions
- High gravity batch and continuous processes for beer production: Evaluation of fermentation performance and beer quality
- Liquid-liquid equilibria of butyric acid for solvents containing a phosphonium ionic liquid
- HAZOP study of a fixed bed reactor for MTBE synthesis using a dynamic approach
- Influence of the reactive distillation column configuration on its performance: A computational study
- Reactive distillation — experimental data for propyl propionate synthesis
- Mixing time of a non-Newtonian liquid in an unbaffled agitated vessel with an eccentric propeller
- Heat transfer coefficient and pressure drop during refrigerant R-134a condensation in a plate heat exchanger
- Pore structure of pyrolyzed scrap tires
- Distribution of local heat transfer coefficient values in the wall region of an agitated vessel
- Chemical pretreatment of feed water for membrane distillation
- Selective methane oxidation to formaldehyde using polymorphic T-, M-, and H-forms of niobium(V) oxide as catalysts
- Validation of the Tessier scheme for speciation of metals in soil using the Bland and Altman test
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