Download or read book The Effect of Circuiting Arrangement on the Thermal Performance of Refrigeration Mixtures in Tube and Fin Condensing Heat Exchangers written by and published by . This book was released on 1999 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: For the pure or azeotropic refrigerants typically used in present air conditioning and refrigeration applications, the refrigerant changes phase at a constant temperature. Thus, the refrigerant circuiting arrangement such as crossfiow, counterfiow, or cross-counterflow, has no effect on the thermal performance. For zeotropic refrigerant mixtures, however, the phase-change occurs over a temperature range, or "glide", and the refrigerant circuiting arrangement, or flow path through the heat exchanger, can affect the thermal performance of both the heat exchangers as well as the overall efficiency of the vapor compression cooling cycle. The effects of tsvo diflerent circuiting arrangements on the thermal performance of a zeotropic retligerant mixture and an almost azeotropic refrigerant mixture in a four-row cross-countertlow heat exchanger arrangement are reported here. The two condensers differ only in the manner of circuiting the refrigerant tubes, where one has refrigerant always flowing downward in the active heat transfer region ("identical order") and the other has refrigerant alternating flow direction in the active heat transfer region ("inverted order"). All other geometric parameters, such as bce are% fin louver geometry, refrigerant tube size and enhancement etc., are the same for both heat exchangers. One refrigerant mixture (R-41OA) un & rgoes a small temperature change ("low glide") during phase change, and the other retligerant mixture (a multi- component proprietary mixture) has a substantial temperature change ("high glide") of approximately 10"C during the phase change process. The overall thermal conductance, two-phase conductance, and pressure drop are presented. For the flow conditions of these tests, which are representative of resi & ntial cooling conditions, inverted order circuiting is more desirable than identical order. The potential thermal advantages of the i & ntical order arrangement for high-glide zeotropic refrigerant mixtures are negated by the increased parasitic refrigerant-side pressure drop utiortunately resulting from tkbrication requirements of the identical order circuiting.

Download or read book International bulletin of information on refrigeration written by International Institute of Refrigeration and published by . This book was released on 1982 with total page 688 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vols. 6- include supplementary material of Publications, Reports, Work, etc. of the Institute and some of its commissions.

Download or read book Chemical Abstracts written by and published by . This book was released on 2002 with total page 2710 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Compact Heat Exchangers written by Alexander Louis London and published by CRC Press. This book was released on 1990 with total page 798 pages. Available in PDF, EPUB and Kindle. Book excerpt: Heat exchangers are a crucial part of aerospace, marine, cryogenic and refrigeration technology. These essays cover such topics as complicated flow arrangements, complex extended surfaces, two-phase flow and irreversibility in heat exchangers, and single-phase heat transfer.

Download or read book Two Phase Flow in Refrigeration Systems written by Junjie Gu and published by Springer Science & Business Media. This book was released on 2013-08-17 with total page 167 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two-Phase Flow in Refrigeration Systems presents recent developments from the authors' extensive research programs on two-phase flow in refrigeration systems. This book covers advanced mass and heat transfer and vapor compression refrigeration systems and shows how the performance of an automotive air-conditioning system is affected through results obtained experimentally and theoretically, specifically with consideration of two-phase flow and oil concentration. The book is ideal for university postgraduate students as a textbook, researchers and professors as an academic reference book, and by engineers and designers as handbook.

Download or read book Experimental and Theoretical Study of Water Side Fouling Thermal Performance of Refrigerant to Water Condensers written by Xiaoxiao Wu and published by . This book was released on 2013 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: Brazed plate heat exchanges (BPHEs) and tube-in-tube heat exchangers (TTHEs) are commonly used in the refrigeration, air conditioning, and food industry as refrigerant-to-water condensers, in which the refrigerant rejects heat to water circulating in cooling tower loops. These heat exchangers often suffer from severe fouling issues because as the water in the cooling tower evaporates, the mineral concentration in the remaining water increases. Once the solubility limits are reached, the minerals precipitate and a layer of fouling formed on the heat transfer surfaces. Due to the fouling deposit, the thermal resistance between refrigerant and water gradually increases. The fouling formation penalizes the overall effectiveness of the refrigerant condensers, and thus, must be properly accounted for during the equipment design.

Download or read book Qpedia Thermal Management Electronics Cooling Book Volume 3 written by Advanced Thermal Solutions and published by Advanced Thermal Solutions. This book was released on 2009 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: The complete editorial contents of Qpedia Thermal eMagazine, Volume 3, Issues 1 - 12 features in-depth, technical articles covering the most critical areas of electronics cooling.

Download or read book Computer Model for Air cooled Refrigerant Condensers with Specified Refrigerant Circuiting written by and published by . This book was released on 1981 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A computer model for an air-cooled refrigerant condensor is presented; the model is intended for use in detailed design analyses or in simulation of the performance of existing heat exchangers that have complex refrigerant circuiting or unusual air-side geometries. The model relies on a tube-by-tube computational approach calculating the thermal and fluid-flow performance of each tube in the heat exchanger individually, using local temperatures and heat transfer coefficients. The refrigerant circuiting must be specified; the joining or branching of parallel circuits is accommodated using appropriate mixing expressions. Air-side heat exchange correlations may be specified so that various surface geometries can be investigated. Results of the analyses of two condensers are compared to experiment.

Download or read book Thermal Processing of Food Products by Steam and Hot Water written by Seid Mahdi Jafari and published by Woodhead Publishing. This book was released on 2022-11-10 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thermal Processing of Food Products by Steam and Hot Water, a volume in the Unit Operations and Processing Equipment in the Food Industry series, explains the processing operations and equipment necessary for the thermal processing of different food products by applying steam and hot water. Sections cover an overview of thermal food processing, heat exchangers in the food processing industry, different thermal processing operations in the food industry, and applications of heat exchanges. All sections emphasize basic texts relating to experimental, theoretical, computational and/or the applications of food engineering principles and relevant processing equipment. Written by experts in the field of food engineering, in a simple and dynamic way, this book targets industrial engineers working in the field of food processing and within food factories to make them more familiar with the particular food processing operations and equipment. - Thoroughly explores novel applications of thermal unit operations in the food industry - Evaluates different alternatives for thermal processing operations - Covers the application of heat exchangers in the food industry

Download or read book Fundamentals of Heat Exchanger Design written by Ramesh K. Shah and published by John Wiley & Sons. This book was released on 2003-08-11 with total page 978 pages. Available in PDF, EPUB and Kindle. Book excerpt: Comprehensive and unique source integrates the material usually distributed among a half a dozen sources. * Presents a unified approach to modeling of new designs and develops the skills for complex engineering analysis. * Provides industrial insight to the applications of the basic theory developed.

Download or read book Actes du Congr s international du froid written by and published by . This book was released on 1995 with total page 724 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Heat and Mass Transfer in Refrigeration and Cryogenics written by J. Bougard and published by Chem/Mats-Sci/E. This book was released on 1987 with total page 690 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Refrigeration Systems and Applications written by Ibrahim Din¿er and published by John Wiley & Sons. This book was released on 2017-03-23 with total page 990 pages. Available in PDF, EPUB and Kindle. Book excerpt: The definitive text/reference for students, researchers and practicing engineers This book provides comprehensive coverage on refrigeration systems and applications, ranging from the fundamental principles of thermodynamics to food cooling applications for a wide range of sectoral utilizations. Energy and exergy analyses as well as performance assessments through energy and exergy efficiencies and energetic and exergetic coefficients of performance are explored, and numerous analysis techniques, models, correlations and procedures are introduced with examples and case studies. There are specific sections allocated to environmental impact assessment and sustainable development studies. Also featured are discussions of important recent developments in the field, including those stemming from the author’s pioneering research. Refrigeration is a uniquely positioned multi-disciplinary field encompassing mechanical, chemical, industrial and food engineering, as well as chemistry. Its wide-ranging applications mean that the industry plays a key role in national and international economies. And it continues to be an area of active research, much of it focusing on making the technology as environmentally friendly and sustainable as possible without compromising cost efficiency and effectiveness. This substantially updated and revised edition of the classic text/reference now features two new chapters devoted to renewable-energy-based integrated refrigeration systems and environmental impact/sustainability assessment. All examples and chapter-end problems have been updated as have conversion factors and the thermophysical properties of an array of materials. Provides a solid foundation in the fundamental principles and the practical applications of refrigeration technologies Examines fundamental aspects of thermodynamics, refrigerants, as well as energy and exergy analyses and energy and exergy based performance assessment criteria and approaches Introduces environmental impact assessment methods and sustainability evaluation of refrigeration systems and applications Covers basic and advanced (and hence integrated) refrigeration cycles and systems, as well as a range of novel applications Discusses crucial industrial, technical and operational problems, as well as new performance improvement techniques and tools for better design and analysis Features clear explanations, numerous chapter-end problems and worked-out examples Refrigeration Systems and Applications, Third Edition is an indispensable working resource for researchers and practitioners in the areas of Refrigeration and Air Conditioning. It is also an ideal textbook for graduate and senior undergraduate students in mechanical, chemical, biochemical, industrial and food engineering disciplines.

Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1977 with total page 918 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bulletin de l Institut international du froid written by International Institute of Refrigeration and published by . This book was released on 1999 with total page 850 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evaporator Performance Investigation for Residential Air conditioning Application Using Mixed Refrigerants written by Maciej Chwalowski and published by . This book was released on 1991 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: The design of the heat exchanger utilizing nonazeotropic refrigerant in an air conditioning application presents unique problems due to the phase change of the moist air and the variable specific heat of the evaporating refrigerant mixture. This study discusses the performance analysis and the design procedure of a cross counterflow heat exchanger working as an evaporator in an experimental system which simulated a residential air conditioning application. The design of the heat exchanger, used for the experimental testing, consisted of several depth rows. Separated banks permitted the determination of the sensible and the latent heat loads for each bank and the heat profiles across the heat exchanger. The interaction between the refrigerant mixture and the moist air was quantified by determining the temperature profiles of both media and the moisture removal rate. The overall heat transfer coefficient for each bank of the heat exchanger was determined from the measured quantities. The effect of the change of the mixture composition on heat exchanger performance was evaluated. The focus of the theoretical study was the development of the effectiveness/NTU (epsilon/NTU) relationships with the use of the experimentally derived quantities for moist air flowing across the heat exchanger. For moist air, the variable mixture specific heat, air and heat profiles obtained from the experimental results were utilized to obtain the expression for epsilon/NTU. The derived epsilon/NTU relations were verified and found to be in good agreement with dry and moist air test results. This study resulted an understanding of an application of a refrigerant mixture working fluid in an evaporator and provided tools to design such a heat exchanger.

Download or read book Journal of Applied Chemistry written by and published by . This book was released on 1961 with total page 784 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vols. for 1954- include separately paged section called: Abstracts, formerly published in British abstracts B I and B II.