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A Study Of Computational Fluid Dynamics Assumptions And Their Role In The Evaluation And Design Of Targeted Cooling Strategies For Dairy Operations Validated Through Experimentation
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Book Synopsis A Study of Computational Fluid Dynamics Assumptions and Their Role in the Evaluation and Design of Targeted Cooling Strategies for Dairy Operations Validated Through Experimentation by :
Download or read book A Study of Computational Fluid Dynamics Assumptions and Their Role in the Evaluation and Design of Targeted Cooling Strategies for Dairy Operations Validated Through Experimentation written by and published by . This book was released on 2016 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: Heat stress represents a significant cost to the dairy industry. To alleviate these loses, dairy producers have invested into designing and installing ventilation and cooling systems for their dairy cows. The design of dairy barns is usually (for new barns) based on the cooling requirements for the dairy cows, which vary significantly with breed and region. New systems are beginning to cool the cow itself, rather than the whole barn in order to increase efficiency. The present work evaluates two dairy cow cooling systems: a positive pressure tube ventilation, using experimental data as computational modeling; and a conduction cooling heat exchanger using experimental data. Testing these systems at production scale is expensive and time consuming for producers. In order to alleviate these costs, computational fluid dynamic models can be used to estimate the systems performance before they are installed. However, there is a need to understand how accurately the cow should be represented within these models. Therefore this study evaluates six different cow analogs, three primitives (sphere, cylinder, rectangular prism) and three realistic (six-cylinder cow, low polygon cow, high polygon cow) geometries in order to compare and contrast their applicability in computational modeling. The study discusses the ability of computational fluid dynamics models to evaluate positive pressure tube ventilation. The ability of conduction cooling to maintain cows cool during high temperatures and humidity is discussed in detail. Furthermore, the different cow geometries are evaluated and suggestions as to when each is to be used are provided. The low polygon cow representation is then used to evaluate the animal occupied zone as porous media assumptions within the holding area of the barn.
Book Synopsis Computational Study and Optimization of Wet Cooling Media in Direct Evaporative Heat Exchangers by : Tejas Vijay Bhongale
Download or read book Computational Study and Optimization of Wet Cooling Media in Direct Evaporative Heat Exchangers written by Tejas Vijay Bhongale and published by . This book was released on 2017 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: Evaporative cooling media pads are the primary component of importance in direct evaporative cooling units. To increase the overall efficiency of direct evaporative cooling systems, a wet cooling media pad is considered for further optimization in design and operation. An installation technique called 'staging' of cooling media pads is examined and evaluated for its incremental cooling, water usage, and operational cooling efficiency. For Staging, a cooling media is divided into multiple vertical sections, and separate water distribution headers control each part. Staging of cooling media can reduce water consumption in data centers and potentially lessen the amount of cooling media required. Increasing the number of stages allows more precise control of humidity and temperature at the discharge. The objective of the present study is to validate a computational model in Computational Fluid Dynamics (CFD) software in predicting the cooling efficiency of wet cooling pads. At the initial level of this project, a CFD model of cooling media will be developed and analyzed. Then, this CFD model will be validated with existing experimental data for GLASdek or CELdek cooling pads. The basic parameters of influence such as pad thickness, flute angle, water flow rate are considered for parametric studies and their impact on cooling media saturation effectiveness, the pressure drop across the media and water consumption will be reported. Also, the degree of increase in cooling capacities as the cooling media wall is scaled/stacked up to accommodate higher cooling unit flow discharge will be investigated. Furthermore, this model will be further modified for 'staged' installations and analyzed through the simulations. This information will be helpful in understanding and improving wet cooling media performance.
Book Synopsis Optimization and Computational Fluid Dynamics by : Dominique Thévenin
Download or read book Optimization and Computational Fluid Dynamics written by Dominique Thévenin and published by Springer Science & Business Media. This book was released on 2008-01-08 with total page 301 pages. Available in PDF, EPUB and Kindle. Book excerpt: The numerical optimization of practical applications has been an issue of major importance for the last 10 years. It allows us to explore reliable non-trivial configurations, differing widely from all known solutions. The purpose of this book is to introduce the state-of-the-art concerning this issue and many complementary applications are presented.
Book Synopsis Bulletin of the Atomic Scientists by :
Download or read book Bulletin of the Atomic Scientists written by and published by . This book was released on 1970-06 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Bulletin of the Atomic Scientists is the premier public resource on scientific and technological developments that impact global security. Founded by Manhattan Project Scientists, the Bulletin's iconic "Doomsday Clock" stimulates solutions for a safer world.
Book Synopsis Ejectors for Efficient Refrigeration by : Giuseppe Grazzini
Download or read book Ejectors for Efficient Refrigeration written by Giuseppe Grazzini and published by Springer. This book was released on 2019-01-12 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: Encompassing both practical applications and recent research developments, this book takes the reader from fundamental physics, through cutting-edge new designs of ejectors for refrigeration. The authors’ unique vision marries successful design, system optimization, and operation experience with insights on the application of cutting-edge Computational Fluid Dynamics (CFD) models. This robust treatment leads the way forward in developing improved ejector technologies. The book covers ejectors used for heat powered refrigeration and for expansion work recovery in compression refrigerators, with special emphasis on two-phase flows of “natural” fluids within the ejector, i.e. steam and carbon dioxide. It features worked examples, detailed research results, and analysis tools.
Book Synopsis Advanced Fluid Dynamics by : Hyoung Woo Oh
Download or read book Advanced Fluid Dynamics written by Hyoung Woo Oh and published by IntechOpen. This book was released on 2012-03-09 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a broad range of topics on fluid dynamics for advanced scientists and professional researchers. The text helps readers develop their own skills to analyze fluid dynamics phenomena encountered in professional engineering by reviewing diverse informative chapters herein.
Book Synopsis Generalized Equation for Cooling Time Evaluation and Its Verification by CFD Analysis by : D. Yurchenko
Download or read book Generalized Equation for Cooling Time Evaluation and Its Verification by CFD Analysis written by D. Yurchenko and published by . This book was released on 2009 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this paper, a generalized analytical equation for cooling time evaluation is analyzed and compared with existing exact solutions and verified by computation fluid dynamics (CFD) simulation. The process of quenching of semiaxles and cylindrical forgings in water flow is also considered. Two approaches are analyzed. The traditional approach focuses on quenching, which is based on Newton's boundary condition between the solid surface and fluid. The second approach solves a conjugate heat transfer problem based on a full set of Navier--Stokes equations. CFD technology does not require knowledge of the heat transfer coefficients at the surface of steel parts. Both approaches and results of calculations were compared and the results showed that a generalized correlation can be used for cooling time calculation both for simple and complicated configurations. Calculation results coincide with each other, which indicates that the generalized equation is a suitable method for calculations and development of intensive quenching technologies. As an example, the processes for quenching semi-axle and cylindrical forgings are considered. CFD analysis successfully detected small stagnant zones at the surface of the steel. Such zones could be related to quench crack formation. These results can be used for designing and development of intensive quenching processes.
Book Synopsis Cooling Analysis of Data Centers by : Saurabh K. Shrivastava
Download or read book Cooling Analysis of Data Centers written by Saurabh K. Shrivastava and published by ProQuest. This book was released on 2008 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Bulletin of the Atomic Scientists by :
Download or read book Bulletin of the Atomic Scientists written by and published by . This book was released on 1973-10 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Bulletin of the Atomic Scientists is the premier public resource on scientific and technological developments that impact global security. Founded by Manhattan Project Scientists, the Bulletin's iconic "Doomsday Clock" stimulates solutions for a safer world.
Book Synopsis Computational Fluid Dynamics Simulation-based Artificial Neural Network Modelling for Data Center Cooling Prediction by : Nikita Ravindra Sukthankar
Download or read book Computational Fluid Dynamics Simulation-based Artificial Neural Network Modelling for Data Center Cooling Prediction written by Nikita Ravindra Sukthankar and published by . This book was released on 2019 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: Continuous provision of quality supply air to data center's IT pod room is key parameter in assuring effective data center operation without any down time. Due to number of possible operating conditions and non-linear relations between operating parameters make the working mechanism of data center difficult to optimize energy use. At present industries are using computational fluid dynamics (CFD) to simulate thermal behaviour for all types of operating conditions. The focus of this study is to predict Supply Air Temperature using Artificial Neural Network(ANN) which can overcome limitations of CFD such as high cost, need of expertise and large computation time.For developing ANN, input parameters, number of neurons and hidden layers, activation function and the period of training data set were studied. A commercial CFD software package 6sigma room is used to develop a modular data center consisting IT pod room and an air-handling unit. CFD analysis is carried out for different outside air conditions. Historical weather data of 1 year was considered as an input for CFD analysis. The ANN model is "trained" using data generated from these CFD results. The predictions of ANN model and the results of CFD analysis for a set of example scenarios were compared to measure the agreement between the two. The results show that the ANN model predicts much faster than full computational fluid dynamics simulations with good prediction accuracy. This demonstrates that ANN is an effective way for predicting the performance of an air-handling unit.
Book Synopsis Multifaceted Analysis of Data Centre Cooling Using CFD, Experiment and Second Law of Thermodynamics by : Babak Fakhim
Download or read book Multifaceted Analysis of Data Centre Cooling Using CFD, Experiment and Second Law of Thermodynamics written by Babak Fakhim and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Simulation and Validation of Air Velocity in Evaporative Cooling System Using Computational Fluid Dynamics by : Assanee Buranupakorn
Download or read book Simulation and Validation of Air Velocity in Evaporative Cooling System Using Computational Fluid Dynamics written by Assanee Buranupakorn and published by . This book was released on 2011 with total page 67 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Experimental and Quasi-experimental Designs for Generalized Causal Inference by : William R. Shadish
Download or read book Experimental and Quasi-experimental Designs for Generalized Causal Inference written by William R. Shadish and published by Cengage Learning. This book was released on 2002 with total page 664 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sections include: experiments and generalised causal inference; statistical conclusion validity and internal validity; construct validity and external validity; quasi-experimental designs that either lack a control group or lack pretest observations on the outcome; quasi-experimental designs that use both control groups and pretests; quasi-experiments: interrupted time-series designs; regresssion discontinuity designs; randomised experiments: rationale, designs, and conditions conducive to doing them; practical problems 1: ethics, participation recruitment and random assignment; practical problems 2: treatment implementation and attrition; generalised causal inference: a grounded theory; generalised causal inference: methods for single studies; generalised causal inference: methods for multiple studies; a critical assessment of our assumptions.
Book Synopsis Computational fluid dynamics: validating codes against experiment by : IMechE Energy and Thermofluid Mechanics Group
Download or read book Computational fluid dynamics: validating codes against experiment written by IMechE Energy and Thermofluid Mechanics Group and published by . This book was released on 1991 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Computational fluid dynamics: validating codes against experiment: test cases and submissions by : IMechE Energy and Thermofluid Mechanics Group
Download or read book Computational fluid dynamics: validating codes against experiment: test cases and submissions written by IMechE Energy and Thermofluid Mechanics Group and published by . This book was released on 1991 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Computational Fluid Dynamic Study of Film Cooling Through Angled Shots by : R. Malcolm Frey
Download or read book A Computational Fluid Dynamic Study of Film Cooling Through Angled Shots written by R. Malcolm Frey and published by . This book was released on 1997 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Design and Evaluation of the Inspired-air Cooling System (a Theoretical and Experimental Study). by : S. Sitharama Iyengar
Download or read book Design and Evaluation of the Inspired-air Cooling System (a Theoretical and Experimental Study). written by S. Sitharama Iyengar and published by . This book was released on 1974 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt:
