Defrosting For Air Source Heat Pump

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Defrosting for Air Source Heat Pump

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Author : Mengjie Song
Publisher : Woodhead Publishing
ISBN 13 : 0081025181
Total Pages : 384 pages
Book Rating : 4.0/5 (81 download)

Book Synopsis Defrosting for Air Source Heat Pump by : Mengjie Song

Download or read book Defrosting for Air Source Heat Pump written by Mengjie Song and published by Woodhead Publishing. This book was released on 2019-05-16 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: Defrosting for Air Source Heat Pumps: Research, Analysis and Methods presents a detailed analysis of the methods, processes and problems relating to defrosting, a necessary requirement to maintain the performance of ASHP units. Readers will gain a deeper understanding of control strategies and system design optimization methods that improve the performance and reliability of units. The book discusses the most recent experimental and numerical studies of reverse cycle defrosting and the most widely used defrosting method for ASHP. Techno-economic considerations are also presented, as is the outlook for the future. This book is a valuable resource for research students and academics of thermal energy and mechanical engineering, especially those focusing on defrosting for ASHP, heating, ventilation and energy efficiency, as well as engineers and professionals engaged in the development and management of heat pump machinery. Includes MATLAB codes that allow the reader to implement the knowledge they have acquired in their own simulations and projects Discusses experimental and numerical studies to provide a well-rounded analysis of technologies, methods and available systems Presents techno-economic considerations and a look to the future

Defrosting for Air Source Heat Pump

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Author : Mengjie Song
Publisher : Woodhead Publishing
ISBN 13 : 0081025173
Total Pages : 386 pages
Book Rating : 4.0/5 (81 download)

Book Synopsis Defrosting for Air Source Heat Pump by : Mengjie Song

Download or read book Defrosting for Air Source Heat Pump written by Mengjie Song and published by Woodhead Publishing. This book was released on 2019-06-01 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt: Defrosting for Air Source Heat Pumps: Research, Analysis and Methods presents a detailed analysis of the methods, processes and problems relating to defrosting, a necessary requirement to maintain the performance of ASHP units. Readers will gain a deeper understanding of control strategies and system design optimization methods that improve the performance and reliability of units. The book discusses the most recent experimental and numerical studies of reverse cycle defrosting and the most widely used defrosting method for ASHP. Techno-economic considerations are also presented, as is the outlook for the future. This book is a valuable resource for research students and academics of thermal energy and mechanical engineering, especially those focusing on defrosting for ASHP, heating, ventilation and energy efficiency, as well as engineers and professionals engaged in the development and management of heat pump machinery. Includes MATLAB codes that allow the reader to implement the knowledge they have acquired in their own simulations and projects Discusses experimental and numerical studies to provide a well-rounded analysis of technologies, methods and available systems Presents techno-economic considerations and a look to the future

Frosting and Defrosting of Air Coils

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Author : Per Fahlén
Publisher :
ISBN 13 : 9789178486007
Total Pages : 189 pages
Book Rating : 4.4/5 (86 download)

Book Synopsis Frosting and Defrosting of Air Coils by : Per Fahlén

Download or read book Frosting and Defrosting of Air Coils written by Per Fahlén and published by . This book was released on 1996 with total page 189 pages. Available in PDF, EPUB and Kindle. Book excerpt: Frosting adversely affects the performance of air-coils under adverse conditions. This report surveys the literature in this field with applications such as air-source heat pumps, refrigeration cooling and freezing coils, and heat recovery ventilators. Since the heat and mass transfer characteristics of a coil will significantly influence the process of frosting, many references pertain to the dry and wet heat transfer of finned-tube air-coils. Furthermore, the change in pressure drop and air flow caused by frosting is a major factor in determining the drop in coil capacity. Therefore the survey also lists references to coil pressure drop. The report contains a literature survey part, a technical index and an alphabetical author index. The survey part discusses some of the most important references based, among other things, on the frequency with which they appear in the reference lists of other authors. In the technical index, references are sorted according to their relevance on topics such as heat and mass transfer, frosting, defrosting, defrost control, as well as standards and test methods. Finally, the alphabetical author index simply gives all the references in alphabetical order according to the name of the first author. A total of 738 references are listed. In some cases, however, the references may seem rather peripheral to the subject of frosted coils. This is particularly the case regarding practical experience. Such information is often subordinate to a lot of general operational information regarding refrigeration and heat pump equipment. Nonetheless, such references are worthwhile for the researcher to consider since they provide an important link between the engineering and the research communities.

An Experimental and Numerical Study on Improving Defrosting Performances for an Air Source Heat Pump Unit Having a Multi-circuit Outdoor Coil

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Author : Mengjie Song
Publisher :
ISBN 13 :
Total Pages : 428 pages
Book Rating : 4.:/5 (98 download)

Book Synopsis An Experimental and Numerical Study on Improving Defrosting Performances for an Air Source Heat Pump Unit Having a Multi-circuit Outdoor Coil by : Mengjie Song

Download or read book An Experimental and Numerical Study on Improving Defrosting Performances for an Air Source Heat Pump Unit Having a Multi-circuit Outdoor Coil written by Mengjie Song and published by . This book was released on 2014 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Frosting and Defrosting of Air-coils

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Author : Per Fahlén
Publisher :
ISBN 13 : 9789178486342
Total Pages : 248 pages
Book Rating : 4.4/5 (863 download)

Book Synopsis Frosting and Defrosting of Air-coils by : Per Fahlén

Download or read book Frosting and Defrosting of Air-coils written by Per Fahlén and published by . This book was released on 1996 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: Frosting of air-coils is an important factor in the design and operation of air-source heat pumps, heat recovery ventilators, cooling and refrigeration equipment etc. This report presents results from laboratory testing of two brine-cooled air-coils under frosting conditions. The coils have the same number of plane, continuos fins, 4 tube rows with 12 tubes in each row, tube spacing of 50 mm and fin spacing of 3 and 6 mm respectively. The original purpose of the test program was to compare various possible indicators of coil frosting and to analyze the possible effects of different control strategies on coil capacity and the COP of the system (the analysis will be presented in a separate report). Tests involved inlet air temperatures of -7 and +2 degrees Celsius, variation of humidity between 70 and 100 % RH (including simulated rain), velocities in the range 1 to 4 m/s, and specific cooling loads from 50 to 150 W/m2. Test results include variations due to frosting of e.g. cooling capacity, COP, air flow and pressure drop, fan power, air outlet temperature and humidity, coil temperature, frost mass, and frosting time. Results also include the subsequently required defrost time, defrost energy and collected mass of defrost water. The frosting process was interrupted when the air flow had decreased to 30 % of the original value with a non-frosted coil. The results clearly show the advantage of demand controlled defrosting with variations in frosting time between 2 h with high humidity/high specific cooling load up to, for practical purposes, infinite frosting times with low humidity/low specific cooling load. The accumulated frost mass during one frosting cycle varied from less than 0.02 kg/m2 up to approximately 0.4 kg/m2.

System for Defrosting in a Heat Pump

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Author : Takeshi Odashima
Publisher :
ISBN 13 :
Total Pages : 7 pages
Book Rating : 4.:/5 (794 download)

Book Synopsis System for Defrosting in a Heat Pump by : Takeshi Odashima

Download or read book System for Defrosting in a Heat Pump written by Takeshi Odashima and published by . This book was released on 1976 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:

A Novel Thermal Storage Based Reverse Cycle Defrosting Method and the Operating Performance Evaluations for an Air Source Heat Pump

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Author : Minglu Qu
Publisher :
ISBN 13 :
Total Pages : 428 pages
Book Rating : 4.:/5 (819 download)

Book Synopsis A Novel Thermal Storage Based Reverse Cycle Defrosting Method and the Operating Performance Evaluations for an Air Source Heat Pump by : Minglu Qu

Download or read book A Novel Thermal Storage Based Reverse Cycle Defrosting Method and the Operating Performance Evaluations for an Air Source Heat Pump written by Minglu Qu and published by . This book was released on 2012 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Frosting for Air Source Heat Pumps

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Author : Mengjie Song
Publisher : Elsevier
ISBN 13 : 0323954588
Total Pages : 0 pages
Book Rating : 4.3/5 (239 download)

Book Synopsis Frosting for Air Source Heat Pumps by : Mengjie Song

Download or read book Frosting for Air Source Heat Pumps written by Mengjie Song and published by Elsevier. This book was released on 2024-11-01 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Frosting for Air Source Heat Pumps: Research, Case Studies, and Methods provides a comprehensive accounting of the latest research, analysis, and modeling methods for limiting frosting and maximizing efficiency. The book begins by outlining the fundamentals of frosting mechanisms, including the condensation and freezing of water droplets. It then provides a wide range of case studies that showcase a variety of surfaces, conditions, and energy generation technologies. Finally, the last chapters demonstrate modeling and analysis of frosting operation before laying out critical considerations for designing a frost control strategy in ASHPs. Building on the theory and studies contained in the author’s previous work Defrosting for Air Source Heat Pumps, this book provides essential and advanced information for understanding and controlling frosting for these sustainable energy sources. Outlines the fundamentals of frosting mechanisms in different circumstances and on a variety of surfaces Provides a wide range of real-world case studies, including demonstrations of analysis and modeling in finned tube heat exchangers and ASHPs Details a huge collection of experimental and numerical data on reverse cycle defrosting, the most common defrosting methods for ASHPs

Air-source Heat Pump

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Author : V. D. Baxter
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (522 download)

Book Synopsis Air-source Heat Pump by : V. D. Baxter

Download or read book Air-source Heat Pump written by V. D. Baxter and published by . This book was released on 1984 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Refrigeration, Air Conditioning and Heat Pumps

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Author : G F Hundy
Publisher : Butterworth-Heinemann
ISBN 13 : 0081006667
Total Pages : 512 pages
Book Rating : 4.0/5 (81 download)

Book Synopsis Refrigeration, Air Conditioning and Heat Pumps by : G F Hundy

Download or read book Refrigeration, Air Conditioning and Heat Pumps written by G F Hundy and published by Butterworth-Heinemann. This book was released on 2016-03-07 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt: Refrigeration, Air Conditioning and Heat Pumps, Fifth Edition, provides a comprehensive introduction to the principles and practice of refrigeration. Clear and comprehensive, it is suitable for both trainee and professional HVAC engineers, with a straightforward approach that also helps inexperienced readers gain a comprehensive introduction to the fundamentals of the technology. With its concise style and broad scope, the book covers most of the equipment and applications professionals will encounter. The simplicity of the descriptions helps users understand, specify, commission, use, and maintain these systems. It is a must-have text for anyone who needs thorough, foundational information on refrigeration and air conditioning, but without textbook pedagogy. It includes detailed technicalities or product-specific information. New material to this edition includes the latest developments in refrigerants and lubricants, together with updated information on compressors, heat exchangers, liquid chillers, electronic expansion valves, controls, and cold storage. In addition, efficiency, environmental impact, split systems, retail refrigeration (supermarket systems and cold rooms), industrial systems, fans, air infiltration, and noise are also included. Full theoretical and practical treatment of current issues and trends in refrigeration and air conditioning technology Meets the needs of industry practitioners and system designers who need a rigorous, but accessible reference to the latest developments in refrigeration and AC that is supported by coverage at a level not found in typical course textbooks New edition features updated content on refrigerants, microchannel technology, noise, condensers, data centers, and electronic control

Ice Adhesion

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Author : K. L. Mittal
Publisher : John Wiley & Sons
ISBN 13 : 1119640539
Total Pages : 704 pages
Book Rating : 4.1/5 (196 download)

Book Synopsis Ice Adhesion by : K. L. Mittal

Download or read book Ice Adhesion written by K. L. Mittal and published by John Wiley & Sons. This book was released on 2020-10-21 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book containing 18 chapters is divided into three parts: Part 1: Fundamentals of Ice Formation and Ice Characteristics; Part 2: Ice Adhesion and Its Measurement; and Part 3: Methods to Mitigate Ice Adhesion. The topics covered Include: Factors influencing the formation, adhesion and friction of ice; ice nucleation on solid surfaces; physics of ice nucleation and growth on a surface; condensation frosting; defrosting properties of structured surfaces; relationship between surface free energy and ice adhesion to surfaces; metrology of ice adhesion; test methods for quantifying ice adhesion strength to surfaces; interlaboratory studies of ice adhesion strength; mechanisms of surface icing and deicing technologies; anti-icing using microstructured surfaces; durability assessment of icephobic coatings; bio-inspired icephobic coatings; challenges in rational fabrication of icephobic surfaces; protection from ice accretion on aircraft; and numerical modeling and its application to inflight icing.

International Advanced Researches & Engineering Congress 2017 Proceeding Book

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Author : Recep HALICIOGLU
Publisher : Dr. R. HALICIOGLU
ISBN 13 : 6052450371
Total Pages : 2770 pages
Book Rating : 4.0/5 (524 download)

Book Synopsis International Advanced Researches & Engineering Congress 2017 Proceeding Book by : Recep HALICIOGLU

Download or read book International Advanced Researches & Engineering Congress 2017 Proceeding Book written by Recep HALICIOGLU and published by Dr. R. HALICIOGLU. This book was released on 2017-12-29 with total page 2770 pages. Available in PDF, EPUB and Kindle. Book excerpt: INTERNATIONAL WORKSHOPS (at IAREC'17) (This book inclueds English (main) and Turkish languages) International Workshop on Mechanical Engineering International Workshop on Mechatronics Engineering International Workshop on Energy Systems Engineering International Workshop on Automotive Engineering and Aerospace Engineering International Workshop on Material Engineering International Workshop on Manufacturing Engineering International Workshop on Physics Engineering International Workshop on Electrical and Electronics Engineering International Workshop on Computer Engineering and Software Engineering International Workshop on Chemical Engineering International Workshop on Textile Engineering International Workshop on Architecture International Workshop on Civil Engineering International Workshop on Geomatics Engineering International Workshop on Industrial Engineering International Workshop on Food Engineering International Workshop on Aquaculture Engineering International Workshop on Agriculture Engineering International Workshop on Mathematics Engineering International Workshop on Bioengineering Engineering International Workshop on Biomedical Engineering International Workshop on Genetic Engineering International Workshop on Environmental Engineering International Workshop on Other Engineering Science

Heat Pumps for Cold Climate Heating

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Author : Hui Huang
Publisher : CRC Press
ISBN 13 : 1000062171
Total Pages : 295 pages
Book Rating : 4.0/5 ( download)

Book Synopsis Heat Pumps for Cold Climate Heating by : Hui Huang

Download or read book Heat Pumps for Cold Climate Heating written by Hui Huang and published by CRC Press. This book was released on 2020-05-01 with total page 295 pages. Available in PDF, EPUB and Kindle. Book excerpt: Air source heat pumps are mainly used for space heating, and have the advantages of environmental protection, energy saving, and comfort. Written by leading heat pump technology expert Hui Huang, this book summarizes the research and applications of variable volume ratio two-stage vapor compression air source heat pump technology, and its use in cold climate regions. This book can be used for reference by scientific researchers and engineers engaged in research on air source heat pump technology, product development and popularization; and by energy management and policy researchers. It will also be of value to undergraduate and graduate students studying these areas of technology.

New Ways to Save Energy

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Author : A.S. Strub
Publisher : Springer Science & Business Media
ISBN 13 : 9400989903
Total Pages : 1255 pages
Book Rating : 4.4/5 (9 download)

Book Synopsis New Ways to Save Energy by : A.S. Strub

Download or read book New Ways to Save Energy written by A.S. Strub and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 1255 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of the International Seminar organized by the Commission of the European Communities, held in Brussels, 21-25 October 1979

Heat Pumps for the Home

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Author : John Cantor
Publisher : Crowood
ISBN 13 : 184797581X
Total Pages : 225 pages
Book Rating : 4.8/5 (479 download)

Book Synopsis Heat Pumps for the Home by : John Cantor

Download or read book Heat Pumps for the Home written by John Cantor and published by Crowood. This book was released on 2013-06-30 with total page 225 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent years, heat pumps have emerged as a promising new form of technology with a relatively low environmental impact. Moreover, they have presented householders with an opportunity to reduce their heating bills. Heat pumps can heat a building by 'pumping' heat from either the ground or the air outside: an intriguing process which utilizes principles that are somewhat analogous to those employed in the domestic refrigerator. Armed with the practical information contained in these pages, homeowners will have the necessary knowledge to take advantage of this potentially low-carbon technology to heat their properties.Describes what a heat pump is, how it works, the different methods of pumping heat and the importance of an appropriate and well-planned installation. Examines the air, the ground and water as sources of heat and explains how to make an informed choice. Considers the all-important subject of distributing the heat through radiators or through an under-floor system. Covers hot water production and delivery to the taps. Outlines environmental and financial issues associated with heat pumps. Dispels some common misconceptions and presents a number of case studies. Essential reading for all those householders who are considering installing heat pumps in order to heat their homes in a more eco-friendly and efficient way. Aimed at those homeowners who wish to do some of the work themselves or who wish to shadow sub-contractors. A useful reference tool for architects, plumbers, heating engineers, builders and students. Superbly illustrated with 155 colour photographs and diagrams by Gavin D J Harper. John Cantor is a heat pump engineer, inspector and consultant and has written many articles on the subject. Gavin D J Harper is a member of the Institute of Engineering and Technology.

Handbook of Air Conditioning, Heating, and Ventilating

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Author : Eugene Stamper
Publisher : Industrial Press Inc.
ISBN 13 : 9780831111243
Total Pages : 1444 pages
Book Rating : 4.1/5 (112 download)

Book Synopsis Handbook of Air Conditioning, Heating, and Ventilating by : Eugene Stamper

Download or read book Handbook of Air Conditioning, Heating, and Ventilating written by Eugene Stamper and published by Industrial Press Inc.. This book was released on 1979 with total page 1444 pages. Available in PDF, EPUB and Kindle. Book excerpt: This comprehensive and acclaimed volume provides a wealth of practical information on the design, installation, and operation of air conditioning, heating, and ventilating systems.

Energy Research Abstracts

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Author :
Publisher :
ISBN 13 :
Total Pages : 496 pages
Book Rating : 4.:/5 (3 download)

Book Synopsis Energy Research Abstracts by :

Download or read book Energy Research Abstracts written by and published by . This book was released on 1988 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt: