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Transcritical Co2 Heat Pump
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Book Synopsis Transcritical CO2 Heat Pump by : Xin-rong Zhang
Download or read book Transcritical CO2 Heat Pump written by Xin-rong Zhang and published by John Wiley & Sons. This book was released on 2021-05-10 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: A timely and comprehensive introduction to CO2 heat pump theory and usage A comprehensive introduction of CO2 application in heat pump, authored by leading scientists in the field CO2 is a hot topic due to concerns over global warming and the 'greenhouse effect'. Its disposal and application has attracted considerable research and governmental interest Explores the basic theories, devices, systems and cycles and real application designs for varying applications, ensuring comprehensive coverage of a current topic CO2 heat transfer has everyday applications including water heaters, air-conditioning systems, residential and commercial heating systems, and cooling systems
Book Synopsis Transcritical CO2 Heat Pump by : Xin-rong Zhang
Download or read book Transcritical CO2 Heat Pump written by Xin-rong Zhang and published by John Wiley & Sons. This book was released on 2021-02-17 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: A timely and comprehensive introduction to CO2 heat pump theory and usage A comprehensive introduction of CO2 application in heat pump, authored by leading scientists in the field CO2 is a hot topic due to concerns over global warming and the 'greenhouse effect'. Its disposal and application has attracted considerable research and governmental interest Explores the basic theories, devices, systems and cycles and real application designs for varying applications, ensuring comprehensive coverage of a current topic CO2 heat transfer has everyday applications including water heaters, air-conditioning systems, residential and commercial heating systems, and cooling systems
Book Synopsis A Study of a Transcritical Multi-stage Carbon Dioxide Heat Pump by : Ayman G. M. Ibrahim
Download or read book A Study of a Transcritical Multi-stage Carbon Dioxide Heat Pump written by Ayman G. M. Ibrahim and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Market study for transcritical CO2 heat pumps for hot water production in chp and chc plants by : Kim G. Christen
Download or read book Market study for transcritical CO2 heat pumps for hot water production in chp and chc plants written by Kim G. Christen and published by . This book was released on 2004 with total page 22 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 Energy-based Visualisation of a Transcritical CO2 Heat Pump Cycle by :
Download or read book Energy-based Visualisation of a Transcritical CO2 Heat Pump Cycle written by and published by . This book was released on 2019 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt: Carbon dioxide (CO2) -- Transcritical heat pump -- Energy-based representation -- Fault detection -- Fault diagnosis -- Fault detection and isolation -- Koolstofdioksied (CO2) -- Transkritiese hittepompstelsel -- Energie-gebaseerde voorstelling -- Foutopsporing -- Foutdiagnose -- Foutdeteksie en isolasie.
Book Synopsis Performance Analysis of a Transcritical CO2 Heat Pump Water Heater Incorporating a Brazed-Plate Gas-Cooler by :
Download or read book Performance Analysis of a Transcritical CO2 Heat Pump Water Heater Incorporating a Brazed-Plate Gas-Cooler written by and published by . This book was released on 2014 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study focuses on the experimental testing and numerical modeling of a 4.5 kW transcritical CO2 heat pump water heater at Queen's University in the Solar Calorimetry Laboratory. Due to the predicted high heat rejection temperatures in a transcritical vapour-compression cycle, buoyancy driven thermosyphon flow through a brazed-plate gas-cooler was proposed to promote tank stratification and to improve system performance. The performance was evaluated through a series of experimental sensitivity and static tank charge tests. A TRNSYS model was also created and verified to simulate the performance of the system under a detailed user demand schedule for a week of operation. The TRNSYS model used a parametric table created with a steady-state model of the vapour-compression system in EES that was validated against experimental data to a standard error of the Y-estimate of ±0.073 kW for heating capacity, ±1.01°C for gas-cooler exit temperature, and ±0.086 for COP. A series of tank charge tests were conducted under thermosyphon flow and forced flow rates at 1 L/min, 2 L/min, and 4 L/min. The thermosyphon charge test produced the highest level of stratification and a total COP of 3 at an average flow rate of 0.73 L/min. All of the forced convection cases operated with a higher degree of mixing. TRNSYS model simulations with hot water draws found that the thermosyphon flow configuration performed with a higher degree of stratification under regular user demand while simulations with high flow rates resulted in a mixed tank at a high temperature. Results predicted an 11% reduction in required heat energy input to the storage, a 30% reduction in electrical energy consumption, a 35% reduction in heat loss, and a 29% improvement in COP for the thermosyphon test as compared to the operation with a mixed tank at 4 L/min. The thermosyphon draw test also performed with the lowest average tank temperature, yet produced the highest draw temperatures. Through these results, it was concluded that natural convection operation with brazed-plate gas-coolers can contribute to a better performing system and this flow configuration should be considered in future applications of this technology.
Book Synopsis Advanced Applications of Supercritical Fluids in Energy Systems by : Chen, Lin
Download or read book Advanced Applications of Supercritical Fluids in Energy Systems written by Chen, Lin and published by IGI Global. This book was released on 2017-03-24 with total page 712 pages. Available in PDF, EPUB and Kindle. Book excerpt: Supercritical fluids have been utilized for numerous scientific advancements and industrial innovations. As the concern for environmental sustainability grows, these fluids have been increasingly used for energy efficiency purposes. Advanced Applications of Supercritical Fluids in Energy Systems is a pivotal reference source for the latest academic material on the integration of supercritical fluids into contemporary energy-related applications. Highlighting innovative discussions on topics such as renewable energy, fluid dynamics, and heat and mass transfer, this book is ideally designed for researchers, academics, professionals, graduate students, and practitioners interested in the latest trends in energy conversion.
Book Synopsis Optimization, Control, and Implementation of CO2 Transcritical Air Conditioning Systems by : Ahmed Ali Okasha
Download or read book Optimization, Control, and Implementation of CO2 Transcritical Air Conditioning Systems written by Ahmed Ali Okasha and published by . This book was released on 2020 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt: The US EPA listed R134a as unacceptable refrigerant for newly light-duty vehicles manufactured or sold in the United States as of model year 2021. Carbon dioxide CO2 (R744) has been revived as a natural environmentally friendly refrigerant and is considered a strong alternative to R134a as it has a global warming potential (GWP) of 1 compared to 1300 for R134a. In an air-conditioning system and due to the different thermodynamic properties of CO2, the heat rejection process at the high-pressure side will take place above the critical point for high ambient/sink temperatures. Therefore, for a given ambient temperature, the GC pressure (high-side pressure) can be optimized and controlled independently. Either through simulations or experiments, researchers have been focusing on developing control correlations for the GC pressure to maximize the COP using offline control correlations or online methods. Maximizing COP does not mean that the system is working at its highest cooling/heating capacity that might be desired for example in a transient start-up operation to cool down or heat up the car cabin in the shortest possible time. In addition, offline control correlations suffer deviation from the true optimum as they rely on the system model. Online methods, on the other hand, can be more accurate but often lack the fast convergence to the optimum solution. The aim of this thesis was to develop a new strategy to optimize and control the CO2 transcritical air conditioning system for not only optimum COP, but also optimum cooling/heating capacity or a tradeoff solution based on the system state i.e. transient, steady state, or capacity demand. To find the Pareto Front or the best non-dominated solutions between the COP and the cooling capacity for any set of operating conditions, the existing Non-Dominated Sorting Genetic Algorithm II (NSGA-II) is used, and the results are generated based on a transcritical CO2 thermodynamic model. The best solutions of both objectives COP and cooling capacity are presented by a Pareto Front for a given operating conditions. Each solution of the Pareto Front has a unique GC pressure and superheat. An optimization parameter k that ranges from 0 to 1 is introduced to easily select maximum COP, maximum cooling capacity, or any of trade-off solutions. Based on the system operating conditions, the high-level optimizer signals the system actuators, the GC pressure, and superheat reference values. The proposed optimization and control approach can be employed as a hybrid offline and online strategy. Based on the current operating conditions, the high-level optimizer will provide an initial estimate of the optimum solution to the online optimizer, which will start searching for the true optimum online from this close initial guess. An optional online optimizer can be integrated in the loop e.g. before the controller, resulting in conjunction with the offline optimizer in a hybrid solution. Such hybrid solution can reduce the time to approach the desired operating point compared to online only methods. Compared to offline only methods, this can additionally enhance COP and Qc based on the actual system characteristics, while it is also able to adapt to changing system characteristics. While the results in this thesis are presented in terms of the cooling capacity, the same findings can be applied for the heating capacity. For further experimental investigations of the transcritical cycle, a modular transcritical CO2 heat pump system and its coolant system have been constructed at the MSU Turbomachinery Lab that support cooling, heating, and dehumidification modes. Several parameters' effects on the system performance have been analyzed and the experimental results are reported.
Book Synopsis Thermal Design and Optimization by : Adrian Bejan
Download or read book Thermal Design and Optimization written by Adrian Bejan and published by John Wiley & Sons. This book was released on 1995-12-12 with total page 562 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive and rigorous introduction to thermal system designfrom a contemporary perspective Thermal Design and Optimization offers readers a lucid introductionto the latest methodologies for the design of thermal systems andemphasizes engineering economics, system simulation, andoptimization methods. The methods of exergy analysis, entropygeneration minimization, and thermoeconomics are incorporated in anevolutionary manner. This book is one of the few sources available that addresses therecommendations of the Accreditation Board for Engineering andTechnology for new courses in design engineering. Intended forclassroom use as well as self-study, the text provides a review offundamental concepts, extensive reference lists, end-of-chapterproblem sets, helpful appendices, and a comprehensive case studythat is followed throughout the text. Contents include: * Introduction to Thermal System Design * Thermodynamics, Modeling, and Design Analysis * Exergy Analysis * Heat Transfer, Modeling, and Design Analysis * Applications with Heat and Fluid Flow * Applications with Thermodynamics and Heat and Fluid Flow * Economic Analysis * Thermoeconomic Analysis and Evaluation * Thermoeconomic Optimization Thermal Design and Optimization offers engineering students,practicing engineers, and technical managers a comprehensive andrigorous introduction to thermal system design and optimizationfrom a distinctly contemporary perspective. Unlike traditionalbooks that are largely oriented toward design analysis andcomponents, this forward-thinking book aligns itself with anincreasing number of active designers who believe that moreeffective, system-oriented design methods are needed. Thermal Design and Optimization offers a lucid presentation ofthermodynamics, heat transfer, and fluid mechanics as they areapplied to the design of thermal systems. This book broadens thescope of engineering design by placing a strong emphasis onengineering economics, system simulation, and optimizationtechniques. Opening with a concise review of fundamentals, itdevelops design methods within a framework of industrialapplications that gradually increase in complexity. Theseapplications include, among others, power generation by large andsmall systems, and cryogenic systems for the manufacturing,chemical, and food processing industries. This unique book draws on the best contemporary thinking aboutdesign and design methodology, including discussions of concurrentdesign and quality function deployment. Recent developments basedon the second law of thermodynamics are also included, especiallythe use of exergy analysis, entropy generation minimization, andthermoeconomics. To demonstrate the application of important designprinciples introduced, a single case study involving the design ofa cogeneration system is followed throughout the book. In addition, Thermal Design and Optimization is one of the best newsources available for meeting the recommendations of theAccreditation Board for Engineering and Technology for more designemphasis in engineering curricula. Supported by extensive reference lists, end-of-chapter problemsets, and helpful appendices, this is a superb text for both theclassroom and self-study, and for use in industrial design,development, and research. A detailed solutions manual is availablefrom the publisher.
Book Synopsis Handbook of Research on Advancements in Supercritical Fluids Applications for Sustainable Energy Systems by : Chen, Lin
Download or read book Handbook of Research on Advancements in Supercritical Fluids Applications for Sustainable Energy Systems written by Chen, Lin and published by IGI Global. This book was released on 2020-08-28 with total page 821 pages. Available in PDF, EPUB and Kindle. Book excerpt: Supercritical fluids are increasingly being used in energy conversion and fluid dynamics studies for energy-related systems and applications. These new applications are contributing to both the increase of energy efficiency as well as greenhouse gas reduction. Such research is critical for scientific advancement and industrial innovations that can support environmentally friendly strategies for sustainable energy systems. The Handbook of Research on Advancements in Supercritical Fluids Applications for Sustainable Energy Systems is a comprehensive two-volume reference that covers the most recent and challenging issues and outlooks for the applications and innovations of supercritical fluids. The book first converts basic thermo-dynamic behaviors and “abnormal” properties from a thermophysical aspect, then basic heat transfer and flow properties, recent new findings of its physical aspect and indications, chemical engineering properties, micro-nano-scale phenomena, and transient behaviors in fast and critical environments. It is ideal for engineers, energy companies, environmentalists, researchers, academicians, and students studying supercritical fluids and their applications for creating sustainable energy systems.
Book Synopsis Heat Pumps in Chemical Process Industry by : Anton A. Kiss
Download or read book Heat Pumps in Chemical Process Industry written by Anton A. Kiss and published by CRC Press. This book was released on 2016-10-14 with total page 443 pages. Available in PDF, EPUB and Kindle. Book excerpt: As the chemical process industry is among the most energy demanding sectors, chemical engineers are endeavoring to contribute towards sustainable future. Due to the limitation of fossil fuels, the need for energy independence, as well as the environmental problem of the greenhouse gas effect, there is a large increasing interest in the research and development of chemical processes that require less capital investment and reduced operating costs and lead to high eco-efficiency. The use of heat pumps is a hot topic due to many advantages, such as low energy requirements as well as an increasing number of industrial applications. Therefore, in the current book, authors are focusing on use of heat pumps in the chemical industry, providing an overview of heat pump technology as applied in the chemical process industry, covering both theoretical and practical aspects: working principle, applied thermodynamics, theoretical background, numerical examples and case studies, as well as practical applications. The worked-out examples have been included to instruct students, engineers and process designers about how to design various heat pumps used in the industry. Reader friendly resources namely relevant equations, diagrams, figures and references that reflect the current and upcoming heat pump technologies, will be of great help to all readers from the chemical and petrochemical industry, biorefineries and other related areas.
Book Synopsis Heat Recovery with Commercial, Institutional, and Industrial Heat Pumps by : Vasile Minea
Download or read book Heat Recovery with Commercial, Institutional, and Industrial Heat Pumps written by Vasile Minea and published by CRC Press. This book was released on 2024-06-03 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt: Heat Recovery with Commercial, Institutional, and Industrial Heat Pumps presents the basic concepts and thermodynamic behavior of mechanical vapor compression and recompression. It covers both ammonia water absorption and compression/resorption heat pumps. Including theoretical and practical approaches, the book features numerous solved exercises based on real thermodynamic and climatic parameters and case studies with takeaways from on-site experiences to help the reader better identify the advantages and limitations of each heat pumping technology. The book discusses future implementations of heat recovery heat pump technologies that are among the most energy-efficient and environmentally friendly techniques. This book will interest graduate students studying HVAC, thermal systems, and heat pumps. It will also benefit professionals working with heat pumps, industrial process engineers, manufacturers, and research and design personnel.
Book Synopsis Design of Heat Exchangers for Heat Pump Applications by : Marco Fossa
Download or read book Design of Heat Exchangers for Heat Pump Applications written by Marco Fossa and published by MDPI. This book was released on 2020-12-28 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: Heat pumps (HPs) allow for providing heat without direct combustion, in both civil and industrial applications. They are very efficient systems that, by exploiting electrical energy, greatly reduce local environmental pollution and CO2 global emissions. The fact that electricity is a partially renewable resource and because the coefficient of performance (COP) can be as high as four or more, means that HPs can be nearly carbon neutral for a full sustainable future. The proper selection of the heat source and the correct design of the heat exchangers is crucial for attaining high HP efficiencies. Heat exchangers (also in terms of HP control strategies) are hence one of the main elements of HPs, and improving their performance enhances the effectiveness of the whole system. Both the heat transfer and pressure drop have to be taken into account for the correct sizing, especially in the case of mini- and micro-geometries, for which traditional models and correlations can not be applied. New models and measurements are required for best HPs system design, including optimization strategies for energy exploitation, temperature control, and mechanical reliability. Thus, a multidisciplinary approach of the analysis is requested and become the future challenge.
Book Synopsis Advances in Materials and Mechanical Engineering by : Chandan Pandey
Download or read book Advances in Materials and Mechanical Engineering written by Chandan Pandey and published by Springer Nature. This book was released on 2021-06-06 with total page 419 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the select proceedings of 1st International Conference on Future Trends in Materials and Mechanical Engineering (ICFTMME-2020), organised by Mechanical Engineering Department, SRM Institute of Science and Technology (Formerly known as SRM University), Delhi-NCR Campus, Ghaziabad, Uttar Pradesh, India. The book provides a deep insight of future trends in the advancement of materials and mechanical engineering. A broad range of topics and issues in material development and modern mechanical engineering are covered including polymers, nanomaterials, magnetic materials, fiber composites, stress analysis, design of mechanical components, theoretical and applied mechanics, tribology, solar, additive manufacturing and many more. This book will prove its worth to a broad readership of engineering students, researchers, and professionals.
Book Synopsis Handbook of Research on Advances and Applications in Refrigeration Systems and Technologies by : Gaspar, Pedro Dinis
Download or read book Handbook of Research on Advances and Applications in Refrigeration Systems and Technologies written by Gaspar, Pedro Dinis and published by IGI Global. This book was released on 2015-08-28 with total page 1037 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent years, the sustainability and safety of perishable foods has become a major consumer concern, and refrigeration systems play an important role in the processing, distribution, and storage of such foods. To improve the efficiency of food preservation technologies, it is necessary to explore new technological and scientific advances both in materials and processes. The Handbook of Research on Advances and Applications in Refrigeration Systems and Technologies gathers state-of-the-art research related to thermal performance and energy-efficiency. Covering a diverse array of subjects—from the challenges of surface-area frost-formation on evaporators to the carbon footprint of refrigerant chemicals—this publication provides a broad insight into the optimization of cold-supply chains and serves as an essential reference text for undergraduate students, practicing engineers, researchers, educators, and policymakers.
Book Synopsis Refrigeration Systems and Applications by : Ciro Aprea
Download or read book Refrigeration Systems and Applications written by Ciro Aprea and published by MDPI. This book was released on 2019-12-06 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Special Issue “Refrigeration Systems and Applications” aims to encourage researchers to address the concerns associated with climate change and the sustainability of artificial cold production systems, and to further the transition to the more sustainable technologies and methodologies of tomorrow through theoretical, experimental, and review research on the different applications of refrigeration and associated topics.
