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Showing 1 to 20 of 39 for “"condensation heat transfer"”.
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Condensation heat transfer on nanoengineered surfaces
… a surface that promotes robust dropwise condensation. Due to their remarkably low droplet adhesion, superhydrophobic surfaces were investigated for application to dropwise condensation. Although precise model superhydrophobic surfaces were necessary to gain insight into these phenomena, …
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Parametric studies on dropwise condensation heat transfer
… on surface morphologies. This is significant in condensation heat transfer. Condensation is a critical heat transfer mechanism in industrial processes; Dropwise (DWC) and Filmwise (FWC) condensation processes are important and are focus of this study. There are few studies on surface morphology …
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Advanced materials for enhanced condensation heat transfer
… advanced materials for promoting dropwise condensation: 1. robust hydrophobic functionalizations 2. superhydrophobic textures 3. lubricant-imbibed textures We first define the functional requirements of a hydrophobic functionalization for promoting dropwise condensation and use these …
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A standard operating procedure for accurate condensation heat transfer measurements
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-10-19 without embargo terms
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Enhanced condensation heat transfer for water and low surface tension fluids
Vapor condensation is routinely used as an effective means of transferring heat or separating fluids for applications ranging from personal electronic device thermal management to natural gas processing and electric power generation. Filmwise condensation, where the condensed fluid forms a liquid …
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Augmentation of condensation heat transfer of R-11 by internally finned tubes
Call number: LD2668 .T4 1984 V46
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Augmentation of condensation heat transfer of R-11 by internally finned tubes
Call number: LD2668 .T4 1984 V46
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An experimental apparatus to study enhanced condensation heat transfer of steam on horizontal tubes
… was designed and constructed to study enhanced condensation heat transfer of steam on horizontal tubes. Special care was taken to ensure a leak-tight apparatus so that the non-condensable gas content of the steam can be kept to a few parts-per-million. The boiler and steam piping is made of …
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Scalable Micro/Nanostructured Surfaces for Thin-Film Condensation Heat Transfer Enhancement in Steam Power Plants
… Due to the high surface energy of common heat exchanger materials, the vapor condenses by forming a continuous liquid film with low thermal conductivity (filmwise condensation), hindering heat transfer from the vapor side to the condenser surface. Hydrophobic surfaces achieved by either …
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Heat transfer performance and prediction of low global warming potential R134a refrigerant alternatives
… to have a fundamental understanding of the flow condensation heat transfer performance of low GWP refrigerants such as R513A and R450A. Flow condensation data were extracted from 35 papers and created a database of 5,030 condensation heat transfer coefficient data points. The data points were …
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Dropwise condensation on hydrophilic surfaces
Droplet nucleation and condensation are ubiquitous phenomena in nature and industry. Over the past century, research has shown dropwise condensation heat transfer on non-wetting surfaces to be an order of magnitude higher than filmwise condensation heat transfer on wetting substrates. However, the …
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Probabilistic Flow Regime Map Modeling of Two -Phase Flow
… investigation is to develop models for two-phase heat transfer, void fraction, and pressure drop, three key design parameters, in single, smooth, horizontal tubes using a common probabilistic two-phase flow regime basis. Probabilistic two-phase flow maps are experimentally developed for R134a at …
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Electrostatic charging of jumping droplets on superhydrophobic nanostructured surfaces : fundamental study and applications
Condensation is a ubiquitous process often observed in nature and harnessed in many industrial processes such as power generation, desalination, thermal management, and building environmental control. Recent advancements in surface engineering have offered new opportunities to enhance condensation …
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Effects of flow orientation on condensation in tubes
<p>This study explores the interfacial and heat transfer characteristics of annular condensation of FC-72 in vertical downflow, vertical upflow and horizontal flow as well as the effects of channel orientation on flow condensation. Two separate condensation test modules are employed, one for …
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Performance and optimization of microchannel condensers
This study is the first to document the condensation heat transfer performance of small diameter, microchannel tubes in crossflow heat exchange, and this study provides the first systematic evaluation of the effect of port shape on microchannel tube performance. Furthermore, this study is the first …
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Development and characterization of micro/nano structured surfaces for enhanced condensation
… have long been recognized to have potential for heat transfer enhancement in phase-change processes by achieving extreme wetting properties, which is of great importance in a wide range of applications including thermal management, building environment control, water harvesting, desalination, and …
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Heat transfer rates for filmwise, dropwise, and superhydrophobic condensation on silicon substrates
Condensation, a two-phase heat transfer processes, is commonly utilized in industrial systems. Condensation heat transfer can be optimized by using surfaces in which dropwise condensation (DWC) occurs, and even further optimized using superhydrophobic surfaces. For superhydrophobic condensation, a …
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Modeling of the Evaporation and Condensation of Zeotropic Refrigerant Mixtures in Horizontal Annular Flow
… when zeotropic mixtures undergo evaporation and condensation. Heat transfer in mixtures is shown to be less than the ideal limit due to mass transfer resistance in the vapor. The mass transfer resistance causes bulk temperatures to differ from equilibrium bulk temperatures thus decreasing the …
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Analysis of Interfacial Processes on Non-Wetting Surfaces
… non-wetting surfaces toward the enhancement of condensation effectiveness is analyzed by taking into consideration the tube side and shell side individual interfacial energy transport processes namely, drag reduction, convection heat transfer enhancement, fouling mitigation and dropwise …
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Vibrating lubricant-infused porous surface for enhanced liquid droplet transport
… self-cleaning, anti-icing, and enhanced condensation heat transfer. In recent studies of droplet dynamics on SLIPS, it was observed that a moving droplet on the lubricant film follows lubrication theory and the Landau-Levich law — there is a zone of capillary pressure-driven flow inside …
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