Simulation of Liquid Desiccant Regeneration for an Energy Efficient Air Conditioning System PDF Download

Author: Yasser Abdel Fattah El-Samadony
Publisher:
ISBN:
Category :
Languages : en
Pages : 418

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Author: Carlos Eduardo Leme Nóbrega
Publisher: Springer Science & Business Media
ISBN: 1447155653
Category : Technology & Engineering
Languages : en
Pages : 281

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Book Description
The increasing concern with indoor air quality has led to air-quality standards with increased ventilation rates. Although increasing the volume flow rate of outside air is advisable from the perspective of air-quality, it is detrimental to energy consumption, since the outside air has to be brought to the comfort condition before it is insufflated to the conditioned ambient. Moreover, the humidity load carried within outside air has challenging HVAC engineers to design cooling units which are able to satisfactorily handle both sensible and latent contributions to the thermal load. This constitutes a favorable scenario for the use of solid desiccants to assist the cooling units. In fact, desiccant wheels have been increasingly applied by HVAC designers, allowing distinct processes for the air cooling and dehumidification. In fact, the ability of solid desiccants in moisture removal is effective enough to allow the use of evaporative coolers, in opposition to the traditional vapor-compression cycle, resulting in an ecologically sound system which uses only water as the refrigerant. Desiccant Assisted Cooling: Fundamentals and Applications presents different approaches to the mathematical modeling and simulation of desiccant wheels, as well as applications in thermal comfort and humidity controlled environments. Experts in the field discuss topics from enthalpy, lumped models for heat and mass transfer, and desiccant assisted radiant cooling systems, among others. Aimed at air-conditioning engineers and thermal engineering researchers, this book can also be used by graduate level students and lecturers in the field.

Author: Friedrich Sick
Publisher:
ISBN:
Category :
Languages : en
Pages : 314

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Author: Zaeem Ahmer
Publisher: GRIN Verlag
ISBN: 3668646864
Category : Science
Languages : en
Pages : 104

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Academic Paper from the year 2017 in the subject Engineering - Power Engineering, Eastern Mediterranean University, language: English, abstract: The increase of occupant comfort demands are leading to rising requirement for air conditioning, but deteriorating global energy and environment crisis are starving for energy saving and environmental protection. The need to come up with the new energy saving as well as environmental friendly air conditioning systems has been more urgent than ever before. In hot and humid areas, the liquid desiccant air-conditioning systems based on evaporative cooling was proposed as a promising invention. This system overcomes the difficulty of evaporative cooler increased humidity with cooling, which makes it unsuitable for hot and humid climates, by dehumidifying the air first and then cooling it inside an evaporative cooler with water. The heating effect of dehumidification process is compensated by cooling water circulation. The use of dehumidifier in conjunction with an evaporative cooler increases the efficiency of the system. Some of the advantages of using this system are: it can remove the air latent load, environmental friendly, removes the pollutants from the process air and reduces the amount of the electrical energy consumed. The primary objective of this project is to design a solar based liquid desiccant evaporative system to purify and supply cool air. Liquid desiccant dehumidification has been proven to be an effective method to extract the moisture of air with relatively less energy consumption, especially compared with conventional vapor compression system. Inside the dehumidifier we used calcium chloride solution which after some period of time gets diluted with water and loses its moisture absorbing capacity and therefore, needs to be heated in the solar collector to ensure that the liquid desiccant does not lose its absorption capacity. In this project, several different aspects in solar assisted liquid desiccant based evaporative cooler have been considered. Some of these aspects include the availability of the materials, manufacturability of the product, sustainability of the product, health and safety regulations and the environmental effects of the product.

Author: Thosapon Katejanekarn
Publisher: LAP Lambert Academic Publishing
ISBN: 9783843351188
Category :
Languages : en
Pages : 144

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In tropical, hot and humid climates where temperature and humidity level are high, air conditioning (AC) systems are necessary for providing thermal comfort to building occupants. For an air conditioned space that needs outside air ventilation to maintain indoor air quality, the ventilation air can bring sensible heat ratio (SHR) of cooling load well below 0.7 since it accounts for as high as 80% of total latent load in the space. The cooling load SHR below this value cannot be handled effectively by conventional AC systems. Handling sensible and latent load separately using a hybrid scheme is an interesting option. A desiccant system can handle the latent load while a conventional system can handle mainly the sensible load. This could help reduce overall energy consumption and provide effective control of indoor air condition. This book presents a theoretical and experimental investigation of the use of a liquid desiccant (LiCl) AC system in tropical Thailand. The system treated ventilation air before supplying it into a conditioned space. Solar energy was used for the regeneration process. A simulation procedure developed for evaluating the system performance is also presented.

Author: Napoleon Enteria
Publisher: Springer
ISBN: 9811030472
Category : Technology & Engineering
Languages : en
Pages : 327

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Book Description
This book presents the necessary fundamental knowledge in the research, development, design, selection, and application of desiccant heating, ventilating, and air-conditioning systems. It covers the established installations in different climatic conditions and building types. In addition, advanced performance evaluation techniques are presented, covering thermodynamic, economic, and environmental aspects. Hence, the book is an important resource for undergraduate and graduate students, design and installation engineers, researchers and scientists, building owners and occupants, and energy and environmental policy makers.

Author: Francesco Calise
Publisher: Academic Press
ISBN: 0128206268
Category : Technology & Engineering
Languages : en
Pages : 453

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Book Description
The support for polygeneration lies in the possibility of integrating different technologies into a single energy system, to maximize the utilization of both fossil and renewable fuels. A system that delivers multiple forms of energy to users, maximizing the overall efficiency makes polygeneration an emerging and viable option for energy consuming industries. Polygeneration Systems: Design, Processes and Technologies provides simple and advanced calculation techniques to evaluate energy, environmental and economic performance of polygeneration systems under analysis. With specific design guidelines for each type of polygeneration system and experimental performance data, referred both to single components and overall systems, this title covers all aspects of polygeneration from design to operation, optimization and practical implementation. Giving different aspects of both fossil and non-fossil fuel based polygeneration and the wider area of polygeneration processes, this book helps readers learn general principles to specific system design and development through analysis of case studies, examples, simulation characteristics and thermodynamic and economic data. - Detailed economic data for technology to assist developing feasibility studies regarding the possible application of polygeneration technologies - Offers a comprehensive list of all current numerical and experimental results of polygeneration available - Includes simulation models, cost figures, demonstration projects and test standards for designers and researchers to validate their own models and/or to test the reliability of their results

Author: Xiaohua Liu
Publisher: Springer Science & Business Media
ISBN: 3642422225
Category : Technology & Engineering
Languages : en
Pages : 363

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Temperature and Humidity Independent Control (THIC) of Air-conditioning System focuses on temperature and humidity independent control (THIC) systems, which represents a new concept and new approach for indoor environmental control. This book presents the main components of the THIC systems, including dehumidification devices, high-temperature cooling devices and indoor terminal devices. Other relevant issues, such as operation and control strategy and case studies, are also included. This book is intended for air-conditioning system designers and engineers as well as researchers working with indoor environments. Xiaohua Liu is an associate professor at the Building Energy Research Center, Tsinghua University, China. Yi Jiang is a member of the Chinese Academy of Engineering, the director of the Building Energy Research Center, Tsinghua University, China and the director of the China-USA Joint Research Center on Clean Energy. Tao Zhang is a Ph.D. candidate at the Building Energy Research Center, Tsinghua University, China.

Author:
Publisher: Charles Nehme
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 45

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Book Description
The ever-increasing demand for efficient, sustainable, and environmentally friendly cooling solutions has led to significant advancements in the field of HVAC technology. Among these innovations, desiccant cooling systems have emerged as a promising alternative to traditional air conditioning methods. By harnessing the principles of moisture absorption and evaporation, desiccant cooling systems offer precise control over indoor environments, reduced energy consumption, and minimized environmental impact. This comprehensive guide aims to explore the intricacies of desiccant cooling systems, providing readers with a deep understanding of the fundamental principles, diverse applications, challenges faced, and future trends in this field. Through detailed chapters, we delve into the psychrometric processes, types of desiccants, system components, configurations, performance evaluation, real-world applications, and the innovative solutions that shape the landscape of desiccant cooling technology. As the world grapples with the challenges of climate change and the imperative to reduce greenhouse gas emissions, the significance of sustainable cooling technologies cannot be overstated. Desiccant cooling systems stand at the forefront of this movement, offering a path toward energy efficiency, environmental responsibility, and enhanced indoor comfort. We invite readers, ranging from HVAC professionals and engineers to researchers and environmentally conscious individuals, to embark on this journey through the realms of desiccant cooling. By embracing the knowledge presented within these pages, we can collectively contribute to a greener and more sustainable future.

Author: American Society of Heating, Refrigerating and Air-Conditioning Engineers
Publisher:
ISBN: 9781936504527
Category :
Languages : en
Pages : 328

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The District/Central Solar Water Heating Systems Design Guide provides recommendations on optimal and reliable configurations of solar water heating systems in different climates, with design specifications, planning principles, and guidelines for these systems. The guidelines are complemented by numerous case studies of successfully implemented solar supported thermal networks along with results of exemplary simulations of different system options based on real world scenarios. This book also discusses the benefits and disadvantages of large-scale centralized versus decentralized solar thermal systems. The guide was developed by government, institutional, and private-sector parties funded by the U.S. Army Installations Management Command (IMCOM), U.S. Army Corps of Engineers (USACE), and the U.S. Department of Energy Federal Energy Management Program (DOE FEMP), and reviewed and approved by ASHRAE Technical Committee (TC) 6.7, Solar Energy Utilization.