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Author : Joshua David Heppner
Publisher :
ISBN 13 :
Total Pages : 294 pages
Book Rating : 4.:/5 (35 download)
Download or read book A MEMS Vapor Compression Refrigeration System written by Joshua David Heppner and published by . This book was released on 2007 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Allan Kirkpatrick
Publisher : Springer Nature
ISBN 13 : 3031795792
Total Pages : 91 pages
Book Rating : 4.0/5 (317 download)
Download or read book Introduction to Refrigeration and Air Conditioning Systems written by Allan Kirkpatrick and published by Springer Nature. This book was released on 2022-05-31 with total page 91 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text provides background information, description, and analysis of four major cooling system technologies—vapor compression cooling, evaporative cooling, absorption cooling, and gas cooling. Vapor compression systems are currently the primary technology used in most standard domestic, commercial, and industrial cooling applications, as they have both performance and economic advantages over the other competing cooling systems. However, there are many other applications in which evaporative cooling, absorption cooling, or gas cooling technologies are a preferred choice. The main focus of the text is on the application of the thermal sciences to refrigeration and air conditioning systems. The goals are to familiarize the reader with cooling technology nomenclature, and provide insight into how refrigeration and air conditioning systems can be modeled and analyzed.Cooling systems are inherently complex, as the second law of thermodynamics does not allow thermal energy to be transferred directly from a lower temperature to a higher temperature, so the heat transfer is done indirectly through a thermodynamic cycle. Emphasis is placed on constructing idealized thermodynamic cycles to represent actual physical situations in cooling systems. The text also contains numerous practical examples to show how one can calculate the performance of cooling system components. By becoming familiar with the analyses presented in the examples, one can gain a feel for the the representative values of the various thermal and mechanical parameters that characterize cooling systems.
Author : John Gardner
Publisher : Morgan & Claypool Publishers
ISBN 13 : 1636391931
Total Pages : 113 pages
Book Rating : 4.6/5 (363 download)
Download or read book Thermodynamic Analysis for Industrial Refrigeration Systems written by John Gardner and published by Morgan & Claypool Publishers. This book was released on 2021-08-10 with total page 113 pages. Available in PDF, EPUB and Kindle. Book excerpt: The vapor compression cycle (VCC) underpins the vast majority of refrigeration systems throughout the world. Most undergraduate thermodynamics courses cover the VCC, albeit in a cursory fashion. This book is designed to offer an in-depth look at the analysis, design and operation of large-scale industrial ammonia-based refrigeration systems. An important feature of this work is a treatment of computer-aided analysis using CoolProp, an open source resource for evaluating thermodynamic properties. CoolProp can be incorporated into a large number of common computational platforms including Microsfot Excel, Python, and Matlab, all of which are covered in this book.
Author : Michael W. Larson
Publisher :
ISBN 13 :
Total Pages : 338 pages
Book Rating : 4.:/5 (13 download)
Download or read book A Parametric Analysis of a Vapor Compression Refrigeration System with Mechanical Subcooling at High Condensing Temperatures written by Michael W. Larson and published by . This book was released on 1986 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Allan T. Kirkpatrick
Publisher : Springer
ISBN 13 : 9783031167751
Total Pages : 0 pages
Book Rating : 4.1/5 (677 download)
Download or read book Introduction to Refrigeration and Air Conditioning Systems written by Allan T. Kirkpatrick and published by Springer. This book was released on 2023-01-17 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This second edition builds on the foundation established by the previous first edition published in 2017. The first edition covered background information, description, and analysis of four major cooling system technologies - vapor compression cooling, evaporative cooling, absorption cooling, and gas cooling. The second edition has been expanded to include increased coverage of cooling system refrigerants, fluid mechanics, heat transfer, and building cooling loads. With increasing climate change due to the buildup of greenhouse gas emissions in the atmosphere, there has been a worldwide impetus to transition to cooling systems and refrigerants that have a low or even zero global warming potential. The text is written as a tutorial for engineering students and practicing engineers who want to become more familiar with the performance of refrigeration and air conditioning systems. The goals are to familiarize the reader with cooling technology nomenclature and provide insight into how refrigeration and air conditioning systems can be modeled and analyzed. Emphasis is placed on constructing idealized thermodynamic cycles to represent actual physical situations in cooling systems. The book contains numerous practical examples to show how one can calculate the performance of cooling system components. By becoming familiar with the analyses presented in the examples, one can gain a feel for representative values of the various thermal and mechanical parameters that characterize cooling systems.
Author : John Gardner
Publisher : Springer
ISBN 13 : 9783031797040
Total Pages : 95 pages
Book Rating : 4.7/5 (97 download)
Download or read book Thermodynamic Analysis for Industrial Refrigeration Systems written by John Gardner and published by Springer. This book was released on 2021-08-10 with total page 95 pages. Available in PDF, EPUB and Kindle. Book excerpt: The vapor compression cycle (VCC) underpins the vast majority of refrigeration systems throughout the world. Most undergraduate thermodynamics courses cover the VCC, albeit in a cursory fashion. This book is designed to offer an in-depth look at the analysis, design and operation of large-scale industrial ammonia-based refrigeration systems. An important feature of this work is a treatment of computer-aided analysis using CoolProp, an open source resource for evaluating thermodynamic properties. CoolProp can be incorporated into a large number of common computational platforms including Microsfot Excel, Python, and Matlab, all of which are covered in this book.
Author : Darrell H. Bultman
Publisher :
ISBN 13 :
Total Pages : 412 pages
Book Rating : 4.:/5 (277 download)
Download or read book Performance Degradation of a Vapor-compression Refrigeration System Caused by Reduced Condenser Air Flow written by Darrell H. Bultman and published by . This book was released on 1992 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Bruce Ernest Lindberg
Publisher :
ISBN 13 :
Total Pages : 260 pages
Book Rating : 4.3/5 (129 download)
Download or read book Enabling Technology for the Use of R718 in a Vapor-compression Refrigeration Cycle written by Bruce Ernest Lindberg and published by . This book was released on 2009 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : John Donald Christie
Publisher :
ISBN 13 :
Total Pages : 84 pages
Book Rating : 4.:/5 (324 download)
Download or read book Subcooling Liquid Refrigerant 12 in a Vapor Compression Refrigeration System with a Liquid-vapor Heat Exchanger written by John Donald Christie and published by . This book was released on 1959 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Charles Lee Coggins
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (173 download)
Download or read book Single- and Multiple-stage Cascaded Vapor Compression Refrigeration for Electronics Cooling written by Charles Lee Coggins and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The International Technology Roadmap for Semiconductors (ITRS) predicts that microprocessor power consumption will continue to increase in the foreseeable future. It is also well known that microprocessor performance can be improved by lowering the junction temperature: recent analytical studies show that for a power limited chip, there is a non-linear scaling effect that offers a 4.3x performance enhancement at -100 °C, compared to 85 °C operation. Vapor Compression Refrigeration (VCR) is a sufficiently compact, low cost, and power efficient technology for reducing the junction temperature of microprocessors below ambient, while removing very high heat fluxes via phase change. The current study includes a scaling analysis of single- and multiple-stage VCR systems for electronics cooling and an experimental investigation of small-scale, two-stage cascaded VCR systems. In the scaling analysis, a method for estimating the size of single- and multiple-stage VCR systems is described, and the resulting trends are presented. The compressor and air-cooled condenser are shown to be by far the largest components of the system, dwarfing the evaporator, expansion device, and inter-stage heat exchanger. For systems utilizing off-the-shelf components and removing up to 200 W at evaporator temperatures as low as 173 K, compressor size dominates the system and scales with the compressor's motor. The air-cooled condenser is the second largest component, and its size is constrained by the air-side heat transfer coefficient. In the experimental work, a two-stage cascaded VCR system with a total volume of 60000 cm3 is demonstrated that can remove 40 W at -61 °C.
Download or read book Compact Solid State Cooling Systems written by and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: BEETIT Project: UCLA is developing a novel solid-state cooling technology to translate a recent scientific discovery of the so-called giant electrocaloric effect into commercially viable compact cooling systems. Traditional air conditioners use noisy, vapor compression systems that include a polluting liquid refrigerant to circulate within the air conditioner, absorb heat, and pump the heat out into the environment. Electrocaloric materials achieve the same result by heating up when placed within an electric field and cooling down when removed--effectively pumping heat out from a cooler to warmer environment. This electrocaloric-based solid state cooling system is quiet and does not use liquid refrigerants. The innovation includes developing nano-structured materials and reliable interfaces for heat exchange. With these innovations and advances in micro/nano-scale manufacturing technologies pioneered by semiconductor companies, UCLA is aiming to extend the performance/reliability of the cooling module.
Author : Rafael Guarisma Pinto
Publisher :
ISBN 13 :
Total Pages : 240 pages
Book Rating : 4.:/5 (574 download)
Download or read book Improving Performance of Vapor-compression Refrigeration Cycle at Low Ambient Temperature written by Rafael Guarisma Pinto and published by . This book was released on 1977 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Lester Shen-wei Shen
Publisher :
ISBN 13 :
Total Pages : 270 pages
Book Rating : 4.:/5 (491 download)
Download or read book Essergy Analysis of Basic Vapor-compression Refrigeration System written by Lester Shen-wei Shen and published by . This book was released on 1979 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 844 pages
Book Rating : 4.:/5 (42 download)
Download or read book Proceedings written by and published by . This book was released on 1965 with total page 844 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Ankush Gupta
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (865 download)
Download or read book Dynamic Modeling and Cascaded Control for a Multi-Evaporator Supermarket Refrigeration System written by Ankush Gupta and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The survey from US Department of Energy showed that about one-third of energy consumption in US is due to air conditioning and refrigeration systems. This significant usage of electricity in the HVAC industry has prompted researchers to develop dynamic models for the HVAC components, which leads to implementation of better control and optimization techniques. In this research, efforts are made to model a multi-evaporator system. A novel dynamic modeling technique is proposed based on moving boundary method, which can be generalized for any number of evaporators in a vapor compression cycle. The models were validated experimentally on a commercial supermarket refrigeration unit. Simulation results showed that the models capture the major dynamics of the system in both the steady state and transient external disturbances. Furthermore the use of MEMS (microelectromechanical) based Silicon Expansion Valves (SEVs) have reportedly shown power savings as compared to the Thermal Expansion Valves (TEVs). Experimental tests were conducted on a supermarket refrigeration unit fitted with the MEMS valves to explain the cause of these potential energy savings. In this study an advanced cascaded control algorithm was also designed to control the MEMS valves. The performance of the cascaded control architecture was compared with the standard Thermal Expansion Valves (TEVs) and a commercially available Microstaq (MS) Superheat Controller (SHC). The results reveal that the significant efficiency gains derived on the SEVs are due to better superheat regulation, tighter superheat control and superior cooling effects in shorter time period which reduces the total run-time of the compressor. It was also observed that the duty cycle was least for the cascaded control algorithm. The reduction in duty cycle indicates early shut-off for the compressor resulting in maximum power savings for the cascaded control, followed by the Microstaq controller and then the Thermal Expansion Valves. The electronic version of this dissertation is accessible from http://hdl.handle.net/1969.1/148111
Author : L. S. Shen
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (5 download)
Download or read book Essergy Analysis of Basic Vapor Compression Refrigeration Systems written by L. S. Shen and published by . This book was released on 1979 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Alvin Lowi
Publisher :
ISBN 13 :
Total Pages : 90 pages
Book Rating : 4.:/5 (281 download)
Download or read book Heat-driven Vapor Compression Refrigeration System Development Using Automotive Turbomachinery written by Alvin Lowi and published by . This book was released on 1991 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt:
