Low Grade Heat
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Profiting From Low Grade Heat
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Author : A. W. Crook
language : en
Publisher: IET
Release Date : 1994
Profiting From Low Grade Heat written by A. W. Crook and has been published by IET this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Science categories.
This book discusses the transition from exploitation of our use of natural resources, in particular energy sources, towards more careful use and conservation.
Low Grade Heat Driven Multi Effect Distillation And Desalination
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Author : Hui Tong Chua
language : en
Publisher: Elsevier
Release Date : 2017-03-01
Low Grade Heat Driven Multi Effect Distillation And Desalination written by Hui Tong Chua and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-03-01 with Science categories.
Low Grade Heat Driven Multi-effect Distillation and Desalination describes the development of advanced multi-effect evaporation technologies that are driven by low grade sensible heat, including process waste heat in refineries, heat rejection from diesel generators or microturbines, and solar and geothermal energy. The technologies discussed can be applied to desalination in remote areas, purifying produced water in oil-and-gas industries, and to re-concentrate process liquor in refineries. This book is ideal for researchers, engineering scientists, graduate students, and industrial practitioners working in the desalination, petrochemical, and mineral refining sectors, helping them further understand the technologies and opportunities that relate to their respective industries. For researchers and graduate students, the core enabling ideas in the book will provide insights and open up new horizons in thermal engineering. Focuses on advanced, yet practical, distillation technologies using low-grade sensible heat Explains the new design paradigm that must accompany the development of technologies Contains key experimental data that serves to prove the core concepts that underpin the new technologies Covers extensive thermo-economic analyses of the technologies, the price point for adoption, capital cost comparison with existing technologies, operating costs, and net present values
Compact Heat Exchangers For Energy Transfer Intensification
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Author : Jiri Jaromir Klemes
language : en
Publisher: CRC Press
Release Date : 2015-12-16
Compact Heat Exchangers For Energy Transfer Intensification written by Jiri Jaromir Klemes and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-12-16 with Science categories.
Compact Heat Exchangers for Energy Transfer Intensification: Low-Grade Heat and Fouling Mitigation provides theoretical and experimental background on heat transfer intensification in modern heat exchangers. Emphasizing applications in complex heat recovery systems for the process industries, this book:Covers various issues related to low-grade hea
Power Recovery From Low Grade Heat By Means Of Screw Expanders
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Author : Ian K. Smith
language : en
Publisher: Chandos Publishing
Release Date : 2017-11-13
Power Recovery From Low Grade Heat By Means Of Screw Expanders written by Ian K. Smith and has been published by Chandos Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-11-13 with Science categories.
Current concerns with climate change have resulted in greatly increased interest in power recovery from low grade heat sources. This includes both hot fluid streams which can be expanded directly to produce mechanical power and those which act as a source of heat to closed cycle power generation systems. "Power recovery from low grate heat by means of screw expanders" with a generalised overview of how best to recover power from such sources, based on thermodynamic considerations, which differs to the approach used in classical thermodynamics textbooks and which includes an introductory description of the types of working fluid that are used in systems used to recover power from such sources and the criteria that must be taken into account in their selection. This is followed by a description of the mathematical modelling of twin screw machine geometry. The modelling of the thermodynamics and fluid flow through such machines is then given, together with how this is used to predict their performance. Finally a detailed description is given of systems currently used or projected both for direct expansion of the source fluid and by recovery of heat from it, which includes those which are particularly suited to the use of screw expanders in place of turbines. A novel generalised approach to the thermodynamics of power recovery from low grade heat systemsGives criteria for working fluid selectionProvides details of, and how to model, screw expander geometryDetails how to estimate screw expander performanceSurveys types of system used for power recovery from low grade heat and where this can be improved by the use of screw expanders.
The Conversion Of Low Grade Heat Into Power Using Supercritical Rankine Cycles
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Author : Huijuan Chen
language : en
Publisher:
Release Date : 2011
The Conversion Of Low Grade Heat Into Power Using Supercritical Rankine Cycles written by Huijuan Chen and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.
Low-grade heat sources, here defined as below 300 ÂoC, are abundantly available as industrial waste heat, solar thermal, and geothermal, to name a few. However, they are under-exploited for conversion to power because of the low efficiency of conversion. The utilization of low-grade heat is advantageous for many reasons. Technologies that allow the efficient conversion of low-grade heat into mechanical or electrical power are very important to develop. This work investigates the potential of supercritical Rankine cycles in the conversion of low-grade heat into power. The performance of supercritical Rankine cycles is studied using ChemCAD linked with customized excel macros written in Visual Basic and programs written in C++. The selection of working fluids for a supercritical Rankine cycle is of key importance. A rigorous investigation into the potential working fluids is carried out, and more than 30 substances are screened out from all the available fluid candidates. Zeotropic mixtures are innovatively proposed to be used in supercritical Rankine cycles to improve the system efficiency. Supercritical Rankine cycles and organic Rankine cycles with pure working fluids as well as zeotropic mixtures are studied to optimize the conversion of lowgrade heat into power. The results show that it is theoretically possible to extract and convert more energy from such heat sources using the cycle developed in this research than the conventional organic Rankine cycles. A theory on the selection of appropriate working fluids for different heat source and heat sink profiles is developed to customize and maximize the thermodynamic cycle performance. The outcomes of this research will eventually contribute to the utilization of low-grade waste heat more efficiently.
Low Grade Thermal Energy Harvesting
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Author : Shiren Wang
language : en
Publisher: Woodhead Publishing
Release Date : 2022-03-22
Low Grade Thermal Energy Harvesting written by Shiren Wang and has been published by Woodhead Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-03-22 with Technology & Engineering categories.
Low-Grade Thermal Energy Harvesting: Advances in Thermoelectrics, Materials, and Emerging Applications provides readers with fundamental and key concepts surrounding low-grade thermal energy conversion while also reviewing the latest research directions. The book covers the most promising and emerging technologies for low-grade heat recovery, harvesting and conversion, including wearable thermoelectrics and organic thermoelectrics. Each chapter includes key materials, principles, design and fabrication strategies for low-grade heat recovery. Special attention on emerging materials such as organic composites, 2D materials and nanomaterials are also included. The book emphasizes materials and device structures that enable the powering of wearable electronics and consumer electronics. The book is suitable for materials scientists and engineers in academia and R&D in manufacturing, industry, energy and electronics. Introduces key concepts and fundamental principles of low-grade thermal energy harvesting, storage and conversion Provides an overview on key materials, design principles and fabrication strategies for devices for low energy harvesting applications Focuses on materials and device designs that enable wearable thermoelectrics and flexible electronics applications
Energy Conversion
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Author : Ibrahim H. Al-Bahadly
language : en
Publisher: BoD – Books on Demand
Release Date : 2019-01-16
Energy Conversion written by Ibrahim H. Al-Bahadly and has been published by BoD – Books on Demand this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-01-16 with Technology & Engineering categories.
Energy conversion technology has always been a main focus for researchers in order to meet the increasing demand as well as securing a clean, consistent and reliable energy supply. The constantly rising fuel price is another good reason to develop alternative systems such as wind turbines, hydropower, photovoltaic systems and other renewable energy solutions. This book contains a collection of selected research works in the areas of electric energy generation, renewable energy sources, hybrid system, electromechanical energy conversion, electric machines, power electronic converters and inverters, energy storage, smart grid and traditional energy conversion systems. The book intends to provide academic and industry professionals working in the field of energy conversion and related applications with an update in energy conversion technology, particularly from the applied perspective.
Low Grade Heat A Resource In Cold Climates
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Author :
language : en
Publisher:
Release Date : 1976
Low Grade Heat A Resource In Cold Climates written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1976 with Heat recovery categories.
Thermal Energy Storage For Low Grade Heat And The Organic Rankine Cycle
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Author :
language : en
Publisher:
Release Date : 2014
Thermal Energy Storage For Low Grade Heat And The Organic Rankine Cycle written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with Dissertations, Academic categories.
Limits of efficiencies cause immense amounts of thermal energy in the form of waste heat to be vented to the atmosphere. Up to 60% of unrecovered waste heat is classified as low or ultra-low quality, making recovery difficult or inefficient. The organic Rankine cycle can be used to generate mechanical power and electricity from these low temperatures where other thermal cycles are impractical. A variety of organic working fluids are available to optimize the ORC for any target temperature range. San Diego State University has one such experimental ORC using R245fa, and has been experimenting with multiple expanders. One limitation of recovering waste heat is the sporadic or cyclical nature common to its production. This inconsistency makes sizing heat recovery ORC systems difficult for a variety of reasons including off-design-point efficiency loss, increased attrition from varying loads, unreliable outputs, and overall system costs. Thermal energy storage systems can address all of these issues by smoothing the thermal input to a constant and reliable level and providing back-up capacity for times when the thermal input is deactivated. Multiple types of thermal energy storage have been explored including sensible, latent, and thermochemical. Latent heat storage involves storing thermal energy in the reversible phase change of a phase change material, or PCM, and can have several advantages over other modalities including energy storage density, cost, simplicity, reliability, relatively constant temperature output, and temperature customizability. The largest obstacles to using latent heat storage include heat transfer rates, thermal cycling stability, and potentially corrosive PCMs. Targeting 86°C, the operating temperature of SDSU's experimental ORC, multiple potential materials were explored and tested as potential PCMs including Magnesium Chloride Hexahydrate (MgCl2·6H2O), Magnesium Nitrate Hexahydrate (Mg(NO3)2·6H2O), montan wax, and carnauba wax. The addition of graphite to augment heat transfer rates was also tested. Melting and solidification temperatures largely matched predictions. The magnesium salts were found to be less stable under thermal cycling than the waxes. Graphite was only soluble in the waxes. Mixtures of magnesium salts and waxes yielded a layered composite with the less dense waxes creating a sealing layer over the salt layer that significantly increased the stability of the magnesium salts. Research into optimum heat exchangers and storage vessels for these applications indicates that horizontally oriented aluminum pipes with vertically oriented aluminum fins would be the best method of storing and retrieving energy. Fin spacing can be predicted by an equation based on target temperatures and PCM characteristics.
Low Temperature Energy Systems With Applications Of Renewable Energy
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Author : Andriy Redko
language : en
Publisher: Academic Press
Release Date : 2019-10-23
Low Temperature Energy Systems With Applications Of Renewable Energy written by Andriy Redko and has been published by Academic Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-10-23 with Science categories.
Low-Temperature Energy Systems with Applications of Renewable Energy investigates a wide variety of low-temperature energy applications in residential, commercial, institutional, and industrial areas. It addresses the basic principles that form the groundwork for more efficient energy conversion processes and includes detailed practical methods for carrying out these critical processes. This work considers new directions in the engineering use of technical thermodynamics and energy, including more in-depth studies of the use of renewable sources, and includes worked numerical examples, review questions, and practice problems to allow readers to test their own comprehension of the material. With detailed explanations, methods, models, and algorithms, Low-Temperature Energy Systems with Applications of Renewable Energy is a valuable reference for engineers and scientists in the field of renewable energy, as well as energy researchers and academics. Features end-of chapter review sections with questions and exercises for practical study and utilization. Presents methods for a great variety of energy applications to improve their energy operations. Applies real-world data to demonstrate the impact of low-temperature energy systems on renewable energy use today.