Journal ArticleDOI
Heat Transfer Characteristics in Partial Boiling, Fully Developed Boiling, and Significant Void Flow Regions of Subcooled Flow Boiling
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TLDR
In this paper, the authors identified three locations in the subcooled flow boiling region: the onset of nucleate boiling, the point of net vapor generation, and the location where x = 0 is attained from enthalpy balance equations.Abstract:
Subcooled flow boiling covers the region beginning from the location where the wall temperature exceeds the local liquid saturation temperature to the location where the thermodynamic quality reaches zero, corresponding to the saturated liquid state. Three locations in the subcooled flow have been identified by earlier investigators as the onset of nucleate boiling, the point of net vapor generation, and the location where x = 0 is attained from enthalpy balance equations. The heat transfer regions are identified as the single-phase heat transfer prior to ONB, partial boiling (PB), and fully developed boiling (FDB). A new region is identified here as the significant void flow (SVF) region. Available models for predicting the heat transfer coefficient in different regions are evaluated and new models are developed based on our current understandingread more
Citations
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Journal ArticleDOI
An Extension of the Flow Boiling Correlation to Transition, Laminar, and Deep Laminar Flows in Minichannels and Microchannels
TL;DR: In this paper, a flow boiling correlation for large diameter tubes developed by Kandlikar [1, 2] is modified for flow boiling in minichannels by using the laminar single-phase heat transfer coefficient for all liquid flow.
MonographDOI
Two-phase flow, boiling and condensation in conventional and miniature systems
TL;DR: In this paper, a comprehensive introduction to the fundamentals and applications of flow and heat transfer in conventional and miniature systems is provided, providing a comprehensive review of single-phase flow fundamentals and interfacial phenomena, detailed and clear discussion is provided on a range of topics, including two-phase hydrodynamics and flow regimes, mathematical modeling of gas-liquid 2-phase flows, pool and flow boiling, flow and boiling in mini and microchannels, external and internal-flow condensation with and without noncondensables, condensation in small flow passages, and two-
Journal ArticleDOI
Review of heat transfer fluids in tube-receivers used in concentrating solar thermal systems: Properties and heat transfer coefficients
TL;DR: In this article, the authors present a review of current and future liquid, gas, supercritical, two-phase and particulate heat transfer fluid (HTF) technologies for solar thermal power plants.
Journal ArticleDOI
Flow boiling heat transfer in microchannels
Dong Liu,Suresh V. Garimella +1 more
TL;DR: In this paper, a new superposition model is developed to correlate the heat transfer data in the saturated boiling regime in microchannel flows, and specific features of flow boiling in microchannels are incorporated while deriving analytical solutions for the convection enhancement factor and nucleate boiling suppression factor.
Journal ArticleDOI
Thermal performance simulation of a solar cavity receiver under windy conditions
TL;DR: In this paper, a combined calculation method for evaluating the thermal performance of the solar cavity receiver is raised, which couples the Monte-Carlo method, the correlations of the flow boiling heat transfer, and the calculation of air flow field.
References
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Book ChapterDOI
Heat Transfer and Friction in Turbulent Pipe Flow with Variable Physical Properties
TL;DR: In this article, the authors discuss heat transfer and skin friction in turbulent pipe flow with variable physical properties and highlight analytical methods to describe heat transfer mechanisms for constant liquid properties quite satisfactorily and to take into account the influence of the variation of physical properties with temperature versus heat transfer.
Journal ArticleDOI
A General Correlation for Saturated Two-Phase Flow Boiling Heat Transfer Inside Horizontal and Vertical Tubes
TL;DR: In this article, a simple correlation was developed earlier by Kandlikar (1983) for predicting saturated flow boiling heat transfer coefficients inside horizontal and vertical tubes, which was further refined by expanding the data base to 5,246 data points from 24 experimental investigations with ten fluids.
Journal ArticleDOI
On the Size Range of Active Nucleation Cavities on a Heating Surface
TL;DR: In this paper, the authors proposed a model to define the size range of active cavities as a function of wall temperature or heat flux, and showed that maximum and minimum sizes of effective cavities are functions of subcooling, pressure of the system, physical properties, and the thickness of the superheated liquid layer.