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Cascade And Secondary Coolant Supermarket Refrigeration Systems
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Book Synopsis Cascade and Secondary Coolant Supermarket Refrigeration Systems by : Getu Haile-Michael
Download or read book Cascade and Secondary Coolant Supermarket Refrigeration Systems written by Getu Haile-Michael and published by LAP Lambert Academic Publishing. This book was released on 2011-08 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: Traditional supermarket refrigeration systems have long piping system, fittings and joints causing substantial refrigerant losses. The refrigerant losses bring about high cost and environmental damage. Additionally, defrosting of air-coils is one of the most energy consuming processes in supermarket refrigeration systems to keep display cabinets under the required temperature. Various studies, though limited in scope, have been conducted by several researchers in order to provide efficient and environmentally friendly supermarket refrigeration technologies. The current study, therefore, presents numerical models for cascade and secondary coolant systems and new correlations for frost property. These models showed that energy savings from 17500 to 170000kWh per annum could potentially be achieved from a typical supermarket store. These systems also avoid the use of environmentally damaging refrigerants thereby attracting supermarket owners. Finally, a step-by-step exercise of the application of the secondary coolant model has been presented to completely design, select, evaluate and install such systems or retrofit the existing traditional refrigeration systems in supermarkets.
Book Synopsis Dynamic Modeling and Cascaded Control for a Multi-Evaporator Supermarket Refrigeration System by : Ankush Gupta
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
Book Synopsis Heat Recovery in Supermarket Refrigeration by : Johan Marigny
Download or read book Heat Recovery in Supermarket Refrigeration written by Johan Marigny and published by LAP Lambert Academic Publishing. This book was released on 2012-03 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covering the simultaneous needs for cooling and heating in supermarkets by a proper utilization of vapour compression systems is an interesting possibility for significant energy savings. This is a major issue considering supermarket refrigeration systems consume a large amount of energy. The environmental concerns and regulations attached to refrigeration applications forced the implementation of new system solutions where natural refrigerants have been widely used. This book includes an analytic comparison of conventional supermarket refrigeration systems using R404A with refrigeration system solutions using natural refrigerants such as carbon dioxide and ammonia. This investigation points out the fact that systems running with natural refrigerants can compete with systems running with artificial refrigerants by using adequat heat recovery systems such as heat pump cascade, heat pump cascade for sub-cooling, fixed pressure system and de-superheater.
Book Synopsis Low-GWP Commercial Refrigeration Feasibility and Cost-benefit Engineering Evaluation by : A. S. (Ed) Cheng
Download or read book Low-GWP Commercial Refrigeration Feasibility and Cost-benefit Engineering Evaluation written by A. S. (Ed) Cheng and published by . This book was released on 2018 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Investigation of Secondary Loop Supermarket Refrigeration Systems by : Ramin T. Faramarzi
Download or read book Investigation of Secondary Loop Supermarket Refrigeration Systems written by Ramin T. Faramarzi and published by . This book was released on 2004 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis CO2 Refrigeration Cycle and Systems by : Xin-Rong Zhang
Download or read book CO2 Refrigeration Cycle and Systems written by Xin-Rong Zhang and published by Springer Nature. This book was released on 2023-05-05 with total page 355 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers the fundamentals and applications of carbon dioxide vapor compression refrigeration thermodynamic cycles. In particular, it presents new application areas, such as making ice and snow in the Winter Olympic Games, food cooling and refrigeration. The book explores the physical and chemical characteristics of CO2 fluid, and the unique traits of its thermodynamic cycle. The contributors explain how CO2 refrigeration is a developing, eco-friendly technology, and emphasize its importance for refrigeration and air-conditioning in the current and future market. This book is a valuable source of information for researchers, engineers and policy makers looking to expand their applicable knowledge of high-potential refrigeration technology using carbon dioxide. It is also of interest to postgraduate students and practitioners looking for an academic insight into the industry’s latest eco-friendly technologies.
Book Synopsis Alternatives to HCFC as Refrigerant in Shipping Vessels by : Torben Møller-Hansen
Download or read book Alternatives to HCFC as Refrigerant in Shipping Vessels written by Torben Møller-Hansen and published by Nordic Council of Ministers. This book was released on 2000 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Role of Exergy in Energy and the Environment by : Sandro Nižetić
Download or read book The Role of Exergy in Energy and the Environment written by Sandro Nižetić and published by Springer. This book was released on 2018-07-30 with total page 889 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is devoted to the analysis and applications of energy, exergy, and environmental issues in all sectors of the economy, including industrial processes, transportation, buildings, and services. Energy sources and technologies considered are hydrocarbons, wind and solar energy, fuel cells, as well as thermal and electrical storage. This book provides theoretical insights, along with state-of-the-art case studies and examples and will appeal to the academic community, but also to energy and environmental professionals and decision makers.
Book Synopsis Refrigeration, Air Conditioning and Heat Pumps Technical Options Committee 2002 by : United Nations Environment Programme
Download or read book Refrigeration, Air Conditioning and Heat Pumps Technical Options Committee 2002 written by United Nations Environment Programme and published by UNEP/Earthprint. This book was released on 2003-09 with total page 213 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 2002 assessment report, produced under the Montreal Protocol on ozone depleting substances, finds that technical progress has been made by the refrigeration, air conditioning and heat pump industry to comply with requirements to phase out CFCs and in several applications, HCFCs as well. However, there is still a significant amount of installed refrigeration equipment still using CFCs and HCFCs, and so service demand remains high and is best minimised by preventive service, containment, retrofit, recovery and recycling.
Book Synopsis Refrigeration, Air Conditioning and Heat Pumps by : Fabio Polonara
Download or read book Refrigeration, Air Conditioning and Heat Pumps written by Fabio Polonara and published by MDPI. This book was released on 2021-02-11 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: Refrigeration, air conditioning, and heat pumps (RACHP) have an important impact on the final energy uses of many sectors of modern society, such as residential, commercial, industrial, transport, and automotive. Moreover, RACHP also have an important environmental impact due to the working fluids that deplete the stratospheric ozone layer, which are being phased out according to the Montreal Protocol (1989). Last, but not least, high global working potential (GWP), working fluids (directly), and energy consumption (indirectly) are responsible for a non-negligible quota of greenhouse gas (GHG) emissions in the atmosphere, thus impacting climate change.
Book Synopsis Advances in New Heat Transfer Fluids by : Alina Adriana Minea
Download or read book Advances in New Heat Transfer Fluids written by Alina Adriana Minea and published by CRC Press. This book was released on 2017-03-16 with total page 661 pages. Available in PDF, EPUB and Kindle. Book excerpt: Heat transfer enhancement has seen rapid development and widespread use in both conventional and emerging technologies. Improvement of heat transfer fluids requires a balance between experimental and numerical work in nanofluids and new refrigerants. Recognizing the uncertainties in development of new heat transfer fluids, Advances in New Heat Transfer Fluids: From Numerical to Experimental Techniques contains both theoretical and practical coverage.
Book Synopsis Sustainable Retail Refrigeration by : Judith A. Evans
Download or read book Sustainable Retail Refrigeration written by Judith A. Evans and published by John Wiley & Sons. This book was released on 2016-01-19 with total page 369 pages. Available in PDF, EPUB and Kindle. Book excerpt: Carbon emissions from the retail segment of the food cold chain are relatively high compared to other parts of the food cold chain. Studies have also shown that food temperature is less well controlled at the retail and consumer end of the cold chain. There is therefore considerable potential to optimize performance of refrigerated display cabinets and the refrigeration systems that are used to operate them to reduce carbon emissions and to improve food temperature control. Sustainable Retail Refrigeration draws together world experts on retail refrigeration. In a single resource, the authors cover the latest technologies and best current knowledge in the field. With increasing concerns about energy use and global warming gasses, retailers are increasingly being called to account for their actions. Sustainable Retail Refrigeration is a valuable reference to manufacturers, managers and policy makers, incorporating both a design and an operational perspective.
Book Synopsis Refrigeration Systems and Applications by : Ibrahim Dinçer
Download or read book Refrigeration Systems and Applications written by Ibrahim Dinçer and published by John Wiley & Sons. This book was released on 2011-08-10 with total page 467 pages. Available in PDF, EPUB and Kindle. Book excerpt: Refrigeration Systems and Applications, 2nd edition offers a comprehensive treatise that addresses real-life technical and operational problems, enabling the reader to gain an understanding of the fundamental principles and the practical applications of refrigeration technology. New and unique analysis techniques (including exergy as a potential tool), models, correlations, procedures and applications are covered, and recent developments in the field are included - many of which are taken from the author's own research activities in this area. The book also includes some discussion of global warming issues and its potential solutions. Enables the reader to gain an understanding of the fundamental principles and the practical applications of refrigeration technologies. Discusses crucial industrial technical and operational problems, as well as new performance improvement techniques and tools for better design and analysis. Includes fundamental aspects of thermodynamics, fluid flow, and heat transfer; refrigerants; refrigeration cycles and systems; advanced refrigeration cycles and systems, including some novel applications; heat pumps; heat pipes; and many more. Provides easy to follow explanations, numerous new chapter-end problems and worked-out examples as learning aids for students and instructors. Refrigeration is extensively used in a variety of thermal engineering applications ranging from the cooling of electronic devices to food cooling processes. Its wide-ranging implications and applications mean that this industry plays a key role in national and international economies, and it continues to be an area of active research and development. Refrigeration Systems and Applications, 2nd edition forms a useful reference source for graduate and postgraduate students and researchers in academia and as well as practicing engineers working in this important field who are interested in refrigeration systems and applications and the methods and analysis tools for their analysis, design and performance improvement.
Book Synopsis Refrigeration Systems and Applications by : Ibrahim Din¿er
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.
Book Synopsis Handbook of Water and Energy Management in Food Processing by : Jiri Klemes
Download or read book Handbook of Water and Energy Management in Food Processing written by Jiri Klemes and published by Elsevier. This book was released on 2008-06-30 with total page 1068 pages. Available in PDF, EPUB and Kindle. Book excerpt: Effective water and energy use in food processing is essential, not least for legislative compliance and cost reduction. This major volume reviews techniques for improvements in the efficiency of water and energy use as well as wastewater treatment in the food industry. Opening chapters provide an overview of key drivers for better management. Part two is concerned with assessing water and energy consumption and designing strategies for their reduction. These include auditing energy and water use, and modelling and optimisation tools for water minimisation. Part three reviews good housekeeping procedures, measurement and process control, and monitoring and intelligent support systems. Part four discusses methods to minimise energy consumption. Chapters focus on improvements in specific processes such as refrigeration, drying and heat recovery. Part five discusses water reuse and wastewater treatment in the food industry. Chapters cover water recycling, disinfection techniques, aerobic and anaerobic systems for treatment of wastewater. The final section concentrates on particular industry sectors including fresh meat and poultry, cereals, sugar, soft drinks, brewing and winemaking. With its distinguished editors and international team of contributors, Handbook of water and energy management in food processing is a standard reference for the food industry. Provides an overview of key drivers for better management Reviews techniques for improvements in efficiency of water and energy use and waste water treatment Examines house keeping proceedures and measurement and process control
Author :Intergovernmental Panel on Climate Change Publisher :Cambridge University Press ISBN 13 :9780521863360 Total Pages :500 pages Book Rating :4.8/5 (633 download)
Book Synopsis Safeguarding the Ozone Layer and the Global Climate System by : Intergovernmental Panel on Climate Change
Download or read book Safeguarding the Ozone Layer and the Global Climate System written by Intergovernmental Panel on Climate Change and published by Cambridge University Press. This book was released on 2005-10-24 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt: Publisher Description
Book Synopsis 1998 Report of the Refrigeration, Air Conditioning, and Heat Pumps Technical Options Committee by : United Nations Environment Programme. Refrigeration, Air Conditioning, and Heat Pumps Technical Options Committee
Download or read book 1998 Report of the Refrigeration, Air Conditioning, and Heat Pumps Technical Options Committee written by United Nations Environment Programme. Refrigeration, Air Conditioning, and Heat Pumps Technical Options Committee and published by UNEP/Earthprint. This book was released on 1998 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt:
