Journal ArticleDOI
CoilDesigner: a general-purpose simulation and design tool for air-to-refrigerant heat exchangers
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TLDR
Object-oriented programming techniques were applied in developing the program to facilitate a modular, highly flexible and customizable design platform and in building a graphic user-friendly interface.Abstract:
A simulation and design tool to improve effectiveness and efficiency in design, and analysis of air to refrigerant heat exchangers, CoilDesigner, is introduced. A network viewpoint was adopted to establish the general-purpose solver and allow for analysis of arbitrary tube circuitry and mal-distribution of fluid flow inside the tube circuits. A segment-by-segment approach within each tube was implemented, to account for two-dimensional non-uniformity of air distribution across the heat exchanger, and heterogeneous refrigerant flow patterns through a tube. Coupled heat exchangers with multiple fluids inside different subsets of tubes can be modeled and analyzed simultaneously. A further sub-dividing-segment model was developed in order to address the significant change of properties and heat transfer coefficients in the single-phase and two-phase regime when a segment experiences flow regime change. Object-oriented programming techniques were applied in developing the program to facilitate a modular, highly flexible and customizable design platform and in building a graphic user-friendly interface. A wide variety of working fluids and correlations of heat transfer and pressure drop are available at the user's choice. The model prediction with CoilDesigner was verified against experimentally determined data collected from a number of sources.read more
Citations
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Journal ArticleDOI
Cross-validation based single response adaptive design of experiments for Kriging metamodeling of deterministic computer simulations
TL;DR: In this article, the authors proposed a new approach for single response adaptive design of deterministic computer experiments, called SFCVT, for Space-Filling Cross-Validation Tradeoff.
Journal ArticleDOI
Simulation and Performance Evaluation of Finned-Tube CO2 Gas Coolers for Refrigeration Systems
Yunting Ge,R. Cropper +1 more
TL;DR: In this article, a detailed mathematical model and its application for air-cooled finned-tube CO2 gas coolers is described, with the aim of increasing the heat capacity or minimizing the approach temperature for a gas cooler.
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Modelling refrigerant distribution in microchannel evaporators
TL;DR: In this paper, the effects of maldistribution of the inlet quality into the channels and non-uniform airflow on the secondary side of the evaporator were investigated.
Journal ArticleDOI
Testing, simulation and soft-optimization of R410A low-GWP alternatives in heat pump system
TL;DR: In this paper, a finite volume heat exchanger model and component-based vapor compression system simulation tools were validated against the experimental data, and the results showed that R32 and L41a are good replacement candidates for R410A.
Journal ArticleDOI
Horizontal two-phase flow characterization for small diameter tubes with a capacitance sensor
Hugo Canière,Christophe T'Joen,Arnout Willockx,M. De Paepe,Marcel Christians,E. van Rooyen,Leon Liebenberg,Josua P. Meyer +7 more
TL;DR: In this paper, a capacitance sensor was developed for horizontal two-phase flow in small diameter tubes, and a test rig was constructed and a series of experiments were done with horizontal air-water flow in a 9 mm tube.
References
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Journal Article
Proposed Correlation of Data for Isothermal Two-Phase, Two-Component Flow in Pipes
Journal ArticleDOI
A general correlation for heat transfer during film condensation inside pipes
TL;DR: In this paper, a dimensionless correlation for predicting heat transfer coefficients during film condensation inside pipes is presented, which has been verified by comparison with a wide variety of experimental data.
Book
Heat Exchangers: Selection, Rating, and Thermal Design
Sadik Kakac,Hongton Liu +1 more
TL;DR: In this paper, the effect of variable physical properties in Turbulent Forced Convection in Smooth Straight Noncircular Ducts and Turbulents Flow in smooth Straight Non-circular ducts is discussed.