The Adsorption Heat Pump
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Adsorption Heat Pumps
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Author : Daniel B. Boman
language : en
Publisher: Springer Nature
Release Date : 2021-05-21
Adsorption Heat Pumps written by Daniel B. Boman and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-05-21 with Science categories.
This volume introduces the fundamentals of adsorption heat pumps, beginning with the simplest cycle and building to the most complex. Selection of adsorbents and refrigerants, design of adsorption beds and auxiliary heat exchangers, and applications for different designs are all discussed. The book educates engineering students, engineers, and researchers about an environmentally friendly alternative to vapor compression refrigeration systems promising for many applications. The authors cover thermodynamic cycles, working materials for the cycles, and aspects of designing and modeling adsorption heat pumps. Elucidates the various applications of adsorption heat pumps; Illustrates modeling techniques for quickly screening new working materials early in their development; Provides comprehensive review of cycle types, with discussion of the applications for which they are best suited; Appropriate for graduate courses on advanced thermodynamics, design of thermal systems, sustainable energy technology, refrigeration technologies, and thermal control of electronics.
Characterization Of Zeolite Based Coatings For Adsorption Heat Pumps
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Author : Angelo Freni
language : en
Publisher: Springer
Release Date : 2015-03-21
Characterization Of Zeolite Based Coatings For Adsorption Heat Pumps written by Angelo Freni and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-03-21 with Technology & Engineering categories.
This book proposes a radically new approach for characterizing thermophysical and mechanical properties of zeolite-based adsorbent coatings for Adsorptive Heat Transformers (AHT). It presents a developed standard protocol for the complete characterization of advanced coated adsorbers. Providing an in-depth analysis of the different procedures necessary for evaluating the performance of adsorbers, it also presents an analysis of their stability under the hydrothermal and mechanical stresses during their entire life cycle. Adsorptive Heat Transformers (AHT), especially adsorption chillers and heat pumps, are considered to be promising technologies to increase thermal energy efficiency. Nevertheless, an overall increase in performance of this apparatus is necessary for them to be considered a mature technology to be used commercially. Development of innovative coated adsorbers can be perceived as a key issue for the enhancement of AHT technology. This procedure relies on the deposition, either by means of a binder or by direct crystallization, of the adsorbent material over a metallic heat exchanger, aiming at the improvement of the heat transfer between the external heat source and the adsorbent itself. This book offers a valuable resource to those working on the development of novel adsorbent materials and advanced adsorbent beds for heating and cooling applications. It is also intended for researchers interested in renewable energy and energy efficiency.
The Adsorption Heat Pump
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Author :
language : en
Publisher:
Release Date : 1984
The Adsorption Heat Pump written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1984 with categories.
Dynamics Of Adsorptive Systems For Heat Transformation
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Author : Alessio Sapienza
language : en
Publisher: Springer
Release Date : 2018-03-07
Dynamics Of Adsorptive Systems For Heat Transformation written by Alessio Sapienza and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-03-07 with Science categories.
This book investigates the adsorption dynamics of water, methanol, ethanol, and ammonia vapor on loose and consolidated adsorbent beds, as well as the impact of this aspect on the overall performance of adsorption systems for heat transformation. In particular, it presents the results of kinetic measurements made using the large temperature jump (LTJ) method, the most efficient way to study adsorption dynamics under realistic operating conditions for adsorptive heat transformers. The information provided is especially beneficial for all those working on the development of novel adsorbent materials and advanced adsorbers for heating and cooling applications. Today, technologies and systems based on adsorption heat transformation (AHT) processes offer a fascinating option for meeting the growing worldwide demand for air conditioning and space heating. Nevertheless, considerable efforts must still be made in order to enhance performance so as to effectively compete with commonly used electrical compression and absorption machines. For this purpose, intelligent design for adsorption units should above all focus on finding a convenient choice of adsorbent material by means of a comprehensive analysis that takes into account both thermodynamic and dynamic aspects. While the thermodynamic properties of the AHT cycle have been studied extensively, the dynamic optimization of AHT adsorbers is still an open issue. Several efforts have recently been made in order to analyze AHT dynamics, which greatly influence overall AHT performance.
Adsorption Heat Pumps
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Author : Daniel B. Boman
language : en
Publisher:
Release Date : 2021
Adsorption Heat Pumps written by Daniel B. Boman and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021 with Electronic books categories.
This volume introduces the fundamentals of adsorption heat pumps, beginning with the simplest cycle and building to the most complex. Selection of adsorbents and refrigerants, design of adsorption beds and auxiliary heat exchangers, and applications for different designs are all discussed. The book educates engineering students, engineers, and researchers about an environmentally friendly alternative to vapor compression refrigeration systems promising for many applications. The authors cover thermodynamic cycles, working materials for the cycles, and aspects of designing and modeling adsorption heat pumps. Elucidates the various applications of adsorption heat pumps; Illustrates modeling techniques for quickly screening new working materials early in their development; Provides comprehensive review of cycle types, with discussion of the applications for which they are best suited; Appropriate for graduate courses on advanced thermodynamics, design of thermal systems, sustainable energy technology, refrigeration technologies, and thermal control of electronics.
Adsorption Refrigeration Technology
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Author : Ruzhu Wang
language : en
Publisher: John Wiley & Sons
Release Date : 2014-06-23
Adsorption Refrigeration Technology written by Ruzhu Wang and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-06-23 with Technology & Engineering categories.
Gives readers a detailed understanding of adsorption refrigeration technology, with a focus on practical applications and environmental concerns Systematically covering the technology of adsorption refrigeration, this book provides readers with a technical understanding of the topic as well as detailed information on the state-of-the-art from leading researchers in the field. Introducing readers to background on the development of adsorption refrigeration, the authors also cover the development of adsorbents, various thermodynamic theories, the design of adsorption systems and adsorption refrigeration cycles. The book guides readers through the research process, covering key aspects such as: the principle of adsorption refrigeration; choosing adsorbents according to different characteristics; thermodynamic equations; methods for the design of heat exchangers for adsorbers; and the advanced adsorption cycles needed. It is also valuable as a reference for professionals working in these areas. Covers state-of-the art of adsorption research and technologies for relevant applications, working from adsorption working pairs through to the application of adsorption refrigeration technology for low grade heat recovery Assesses sustainable alternatives to traditional refrigeration methods, such as the application of adsorption refrigeration systems for solar energy and waste heat Includes a key chapter on the design of adsorption refrigeration systems as a tutorial for readers new to the topic; the calculation models for different components and working processes are also included Takes real-world examples giving an insight into existing products and installations and enabling readers to apply the knowledge to their own work Academics researching low grade energy utilization and refrigeration; Graduate students of refrigeration and low grade energy utilization; Experienced engineers wanting to renew knowledge of adsorption technology,Engineers working at companies developing adsorption chillers; Graduate students working on thermally driven systems; Advanced undergraduates for the Refrigeration Principle as a part of thermal driven refrigeration technology.
Adsorption Heat Pumps Utilizing Zeolite Coatings Grown On Metal Surfaces
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Author : Melkon Tatlıer
language : en
Publisher:
Release Date : 2000
Adsorption Heat Pumps Utilizing Zeolite Coatings Grown On Metal Surfaces written by Melkon Tatlıer and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with categories.
Adsorption heat pumps may provide the heating and cooling effects whenever an appropriate source of energy , such as, waste heat and solar energy is available. Most of the drawbacks which prevent the commercialization of theadsorption heat pumps may be eliminated by using an arrangement involving zeolite coatings synthesized on metal supports. The heat and mass transfer Iimitations which may Iead to significant reductions in the performance of the system may thusbe removed. Zeolites are very suitable to be used in the adsorption heat pumps due to the shapes of their adsorption isotherms. Zeolite 4A is hydrophylic and has a high adsorption capacity for water. The employment of this zeolite in the preparation of coatings on metal supports for heat pump applications is thus possible. However, a significant difficulty exists for zeolite A, as well as for most of the commonly employed zeolites, that is the metastable nature of this zeolite which prevents the preparation of relatively thick coatings by using practical one step direct synthesis methods. Thicker coatings than may be actually prepared by using conventional onestep direct synthesis methods are required for heat pump applications. The stability of the coatings is also an important factor since very rapid heating rates are to beemployed in the adsorption heat pump cycles. Lack of sufficient stability may hinder the effective use of the zeolite-metal integrated systems. In this study, two distinct cases, namely, adsorption heat pumps operating with waste heat and solar energy , both employing arrangements involving zeolite 4A coatings grown on metal supports are investigated. An optimization of the thicknessof the zeolite coatings has been accomplished for the former case. it has been determined that an optimum Iayer thickness exists in the range 25-150 for thewall thicknesses of the heat exchanger tubes investigated. As the wall thickness ofthe heat exchanger tubes is decreased, the optimum zeolite Iayer thickness decreases while both the power and the thermodynamic efficiency of the system increase. The employment of the optimum cycle durations is also determined to enhance the power of the system in considerable amounts. The utilization of zeolite coatings grown on metal wire gauzes may also eliminate any temperature and concentration gradient within the solar collector and it has been determined that azeolite coating thickness of 50-1 00 is sufficient to neglect the adverse effect ofthe mass of the metal wire gauzes on the efficiency of the solar adsorption heatpumps. A novel method is developed for the preparation of zeolite coatings which may delay the phase transformations for extremely Iong periods of time dependingon the volume of the reaction mixture. Accordingly, the substrate is heated directly while the reaction mixture is kept at a Iower temperature by means of a water bath.As a result of the temperature difference between the reaction mixture and the substrate, reaction in the bulk is suppressed while that on the substrate is promoted.By using the direct heating method developed, crystalline coatings of zeolite 4A could be prepared by the proper selection of the temperatures of the water bath andthe substrate. The mass of the zeolite coated on the substrate increases significantly with respect to that obtained by conventional synthesis when theproposed method is utilized and relatively thick zeolite coatings may be prepared ina simple and practical manner. The stability of the coatings prepared by the novel method developed has been determined to be promising. No difficulty has been observed for the desorption of water vapor out of the zeolite Iayer synthesized onmetal supports. Further enhancement of the stability of the coatings seems possiblesince stability has been determined to be a function of the synthesis conditions ofthe novel method developed .
Heat Pumps In Chemical Process Industry
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Author : Anton A. Kiss
language : en
Publisher: CRC Press
Release Date : 2016-10-14
Heat Pumps In Chemical Process Industry written by Anton A. Kiss and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-10-14 with Science categories.
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.
Advances In Adsorption Technology
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Author : Bidyut Baran Saha
language : en
Publisher:
Release Date : 2010
Advances In Adsorption Technology written by Bidyut Baran Saha and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with Adsorption categories.
The efficient utilisation of energy at low heat source temperature is a key issue for both industry and academia. In recent years, the heat-activated adsorption cycles are proven to be practical and energy efficient method for converting low-temperature waste heat into useful effects such as cooling, freezing, heating, storage and desalination and this is reflected by the dearth of literature publications. The adsorption technology would steer towards the key development of heat activated machines for the energy industry and they could offer cost-effective solutions for achieving energy efficiency and environment sustainability. This edited book covers the state-of-the art of adsorption research and technologies for relevant applications with the objectives of energy efficiency and sustainability. It consists of fifteen chapters from renowned experts in adsorption fields around the world covering the aspects of adsorption fundamentals, adsorbent materials characterisations, adsorption cooling, storage, and heat pump systems. This book examines new research directions in this frontier field.
Investigation Of Microparticle To System Level Phenomena In Thermally Activated Adsorption Heat Pumps
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Author : Alexander William Raymond
language : en
Publisher:
Release Date : 2010
Investigation Of Microparticle To System Level Phenomena In Thermally Activated Adsorption Heat Pumps written by Alexander William Raymond and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with Adsorption categories.
Heat actuated adsorption heat pumps offer the opportunity to improve overall energy efficiency in waste heat applications by eliminating shaft work requirements accompanying vapor compression cycles. The coefficient of performance (COP) in adsorption heat pumps is generally low. The objective of this thesis is to model the adsorption system to gain critical insight into how its performance can be improved. Because adsorption heat pumps are intermittent devices, which induce cooling by adsorbing refrigerant in a sorption bed heat/mass exchanger, transient models must be used to predict performance. In this thesis, such models are developed at the adsorbent particle level, heat/mass exchanger component level and system level. Adsorption heat pump modeling is a coupled heat and mass transfer problem. Intra-particle mass transfer resistance and sorption bed heat transfer resistance are shown to be significant, but for very fine particle sizes, inter-particle resistance may also be important. The diameter of the adsorbent particle in a packed bed is optimized to balance inter- and intra-particle resistances and improve sorption rate. In the literature, the linear driving force (LDF) approximation for intra-particle mass transfer is commonly used in place of the Fickian diffusion equation to reduce computation time; however, it is shown that the error in uptake prediction associated with the LDF depends on the working pair, half-cycle time, adsorbent particle radius, and operating temperatures at hand.