Development Of Advanced Low Temperature Heat Transfer Fluids For District Heating And Cooling
DOWNLOAD
Download Development Of Advanced Low Temperature Heat Transfer Fluids For District Heating And Cooling PDF/ePub or read online books in Mobi eBooks. Click Download or Read Online button to get Development Of Advanced Low Temperature Heat Transfer Fluids For District Heating And Cooling book now. This website allows unlimited access to, at the time of writing, more than 1.5 million titles, including hundreds of thousands of titles in various foreign languages. If the content not found or just blank you must refresh this page
Development Of Advanced Low Temperature Heat Transfer Fluids For District Heating And Cooling Final Report
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 1991
Development Of Advanced Low Temperature Heat Transfer Fluids For District Heating And Cooling Final Report written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with categories.
The feasibility of adding phase change materials (PCMS) and surfactants to the heat transfer fluids in district cooling systems was investigated. It increases the thermal capacity of the heat transfer fluid and therefore decreases the volume that needs to be pumped. It also increases the heat transfer rate, resulting in smaller heat exchangers. The thermal behavior of two potential PCMS, hexadecane and tetradecane paraffin wax, was experimentally evaluated. The heat of fusion of these materials is approximately 60% of that of ice. They exhibit no supercooling and are stable under repeated thermal cycling. While test results for laboratory grade materials showed good agreement with data in the literature, both melting point and heat of fusion for commercial grade hexadecane were found to be considerably lower than literature values. PCM/water mixtures were tested in a laboratory-scale test loop to determine heat transfer and flow resistance properties. For 10% and 25% PCM/water slurries, the heat transfer enhancement was found to be approximately 18 and 30 percent above the value for water, respectively. Within the turbulent region, there is only a minor pumping penalty from the addition of up to 25% PCM to the water. Research is continuing on these fluids in order to determine their behavior in large-size loops and to arrive at optimum formulations.
Development Of Advanced Low Temperature Heat Transfer Fluids For District Heating And Cooling
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 1991
Development Of Advanced Low Temperature Heat Transfer Fluids For District Heating And Cooling written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with categories.
The feasibility of adding phase change materials (PCMs) and surfactants to the heat transfer fluids in district cooling systems was investigated. It increases the thermal capacity of the heat transfer fluid and therefore decreases the volume that needs to be pumped. It also increases the heat transfer rate, resulting in smaller heat exchangers. The thermal behavior of two potential PCMs, hexadecane and tetradecane paraffin wax, was experimentally evaluated. The heat of fusion of these materials is approximately 60% of that of ice. They exhibit no supercooling and are stable under repeated thermal cycling. While test results for laboratory grade materials showed good agreement with data in the literature, both melting point and heat of fusion for commercial grade hexadecane were found to be considerably lower than literaturevalues. PCM/water mixtures were tested in a laboratory-scale test loop to determine heat transfer and flow resistance properties. When using PCMs in district cooling systems, clogging of frozen PCM particles isone of the major problems to be overcome. In the present project it is proposed to minimize or prevent clogging by the addition of an emulsifier. Effects of the emulsifier on the mixture of water and hexadecane(a PCM) were studied. As the amount of the emulsifier was increased, the size of the solid PCM particles became smaller. When the size of the particles was small enough, they did not stick together or stick to the cold surface of a heat exchanger. The amount of emulsifier to produce this condition was determined.
Development Of Advanced Low Temperature Heat Transfer Fluids For District Heating And Cooling Final Report September 25 1990 September 24 1991
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 1991
Development Of Advanced Low Temperature Heat Transfer Fluids For District Heating And Cooling Final Report September 25 1990 September 24 1991 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with categories.
The feasibility of adding phase change materials (PCMs) and surfactants to the heat transfer fluids in district cooling systems was investigated. It increases the thermal capacity of the heat transfer fluid and therefore decreases the volume that needs to be pumped. It also increases the heat transfer rate, resulting in smaller heat exchangers. The thermal behavior of two potential PCMs, hexadecane and tetradecane paraffin wax, was experimentally evaluated. The heat of fusion of these materials is approximately 60% of that of ice. They exhibit no supercooling and are stable under repeated thermal cycling. While test results for laboratory grade materials showed good agreement with data in the literature, both melting point and heat of fusion for commercial grade hexadecane were found to be considerably lower than literaturevalues. PCM/water mixtures were tested in a laboratory-scale test loop to determine heat transfer and flow resistance properties. When using PCMs in district cooling systems, clogging of frozen PCM particles isone of the major problems to be overcome. In the present project it is proposed to minimize or prevent clogging by the addition of an emulsifier. Effects of the emulsifier on the mixture of water and hexadecane(a PCM) were studied. As the amount of the emulsifier was increased, the size of the solid PCM particles became smaller. When the size of the particles was small enough, they did not stick together or stick to the cold surface of a heat exchanger. The amount of emulsifier to produce this condition was determined.
Energy Research Abstracts
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 1993-08
Energy Research Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993-08 with Power resources categories.
Advanced District Heating And Cooling Dhc Systems
DOWNLOAD
Author : Robin Wiltshire
language : en
Publisher: Woodhead Publishing
Release Date : 2015-08-31
Advanced District Heating And Cooling Dhc Systems written by Robin Wiltshire and has been published by Woodhead Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-08-31 with Technology & Engineering categories.
Advanced District Heating and Cooling (DHC) Systems presents the latest information on the topic, providing valuable information on the distribution of centrally generated heat or cold energy to buildings, usually in the form of space heating, cooling, and hot water. As DHC systems are more efficient and less polluting than individual domestic or commercial heating and cooling systems, the book provides an introduction to DHC, including its potential contribution to reducing carbon dioxide emissions, then reviews thermal energy generation for DHC, including fossil fuel-based technologies, those based on renewables, and surplus heat valorization. Final sections address methods to improve the efficiency of DHC. Gives a comprehensive overview of DHC systems and the technologies and energy resources utilized within these systems Analyzes the various methods used for harnessing energy to apply to DHC systems Ideal resource for those interested in district cooling, teleheating, heat networks, distributed heating, thermal energy, cogeneration, combined heat and power, and CHP Reviews the application of DHC systems in the field, including both the business model side and the planning needed to implement these systems
Heating And Cooling With Ground Source Heat Pumps In Cold And Moderate Climates
DOWNLOAD
Author : Vasile Minea
language : en
Publisher: CRC Press
Release Date : 2022-04-19
Heating And Cooling With Ground Source Heat Pumps In Cold And Moderate Climates written by Vasile Minea and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-04-19 with Science categories.
Heating and Cooling with Ground-Source Heat Pumps in Cold and Moderate Climates: Design Principles, Potential Applications and Case Studies focuses on applications and cases studies of ground-source heat pumps in moderate and cold climates. It details technical aspects (such as materials, thermal fluid carriers and pumping, and drilling/trenching technologies), as well as the most common and uncommon application fields for basic system configurations. The principles of system integrations and applications in moderate and cold climates (such as hybrid, solar-assisted, thermo-syphon, foundation, mines, snow melting, district heating and cooling ground-source heat pump systems, etc.) are also presented, each followed by case studies. Based on the author's more than 30 years of technical experience Discusses ground-source heat pump technologies that can be successfully applied in moderate and cold climates Presents several case studies, including successful energy results, as well as the main lessons learned This work is aimed at designers of HVAC systems, as well as geological, mechanical, and chemical engineers implementing environmentally-friendly heating and cooling technologies for buildings.
A Novel Concept For Heat Transfer Fluids Used In District Cooling Systems
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 1991
A Novel Concept For Heat Transfer Fluids Used In District Cooling Systems written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with categories.
Low-temperature phase-change materials (PCMS) were mixed with water to enhance the performance of heat transfer fluid. Several PCMs were tested in a laboratory-scale test loop to check their suitability to district cooling applications. The phase-change temperatures and latent heats of fusion of tetradecane, pentadecane, and hexadecane paraffin waxes were measured using a differential scanning calorimeter. The heat of fusion of these materials is approximately 60% of that of ice. They exhibit no supercooling and are stable under repeated thermal cycling. For 10% and 25% PCM-water slurries, the heat transfer enhancement was found to be approximately 18 and 30 percent over the value of water, respectively. It was also found that, in the turbulent region, there is only a minor pumping penalty from the addition of up to 25% PCM to the water. It was demonstrated that pentadecane does not clog in a glass-tube chiller, and continuous pumping below its freezing, point (9.9[degrees]C):was successfully carried out in a bench-scale flow loop. Adding PCM to water increases the thermal capacity of the heat transfer fluid and therefore decreases the volume that needs to be pumped in a district cooling system. It also increases the heat transfer rate, resulting in smaller heat exchangers. Research is continuing on these fluids in order to determine their behavior in large-size loops and to arrive at optimum formulations.
Cryogenic Heat Management
DOWNLOAD
Author : Jonathan Demko
language : en
Publisher: CRC Press
Release Date : 2022-07-21
Cryogenic Heat Management written by Jonathan Demko and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-07-21 with Science categories.
Cryogenic engineering (cryogenics) is the production, preservation, and use or application of cold. This book presents a comprehensive introduction to designing systems to deal with heat – effective management of cold, exploring the directing (or redirecting), promoting, or inhibiting this flow of heat in a practical way. It provides a description of the necessary theory, design methodology, and advanced demonstrations (thermodynamics, heat transfer, thermal insulation, fluid mechanics) for many frequently occurring situations in low-temperature apparatus. This includes systems that are widely used such as superconducting magnets for magnetic resonance imaging (MRI), high-energy physics, fusion, tokamak and free electron laser systems, space launch and exploration, and energy and transportation use of liquid hydrogen, as well as potential future applications of cryo-life sciences and chemical industries. The book is written with the assumption that the reader has an undergraduate understanding of thermodynamics, heat transfer, and fluid mechanics, in addition to the mechanics of materials, material science, and physical chemistry. Cryogenic Heat Management: Technology and Applications for Science and Industry will be a valuable guide for those researching, teaching, or working with low-temperature or cryogenic systems, in addition to postgraduates studying the topic. Key features: Presents simplified but useful and practical equations that can be applied in estimating performance and design of energy-efficient systems in low-temperature systems or cryogenics Contains practical approaches and advanced design materials for insulation, shields/anchors, cryogen vessels/pipes, calorimeters, cryogenic heat switches, cryostats, current leads, and RF couplers Provides a comprehensive introduction to the necessary theory and models needed for solutions to common difficulties and illustrates the engineering examples with more than 300 figures
Fiscal Year 1990 Department Of Energy Authorization
DOWNLOAD
Author : United States. Congress. House. Committee on Science, Space, and Technology. Subcommittee on Energy Research and Development
language : en
Publisher:
Release Date : 1989
Fiscal Year 1990 Department Of Energy Authorization written by United States. Congress. House. Committee on Science, Space, and Technology. Subcommittee on Energy Research and Development and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989 with Energy policy categories.
Assessment Of Impact Of Advanced Energy Transmission Fluids On District Heating And Cooling Systems Phase 1
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 1987
Assessment Of Impact Of Advanced Energy Transmission Fluids On District Heating And Cooling Systems Phase 1 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1987 with categories.
Argonne National Laboratory (ANL), under sponsorship of the US Department of Energy (DOE) Office of Buildings and Community Systems, has embarked upon a comprehensive, long-range program to develop high-performance advanced energy transmission fluids for use in district heating and cooling (DHC) systems. ANL has the lead technical role in this DOE program. These advanced fluids will substantially reduce flow frictional losses and enhance energy transfer. In system enhancement scoping studies conducted by ANL, the fluids yielded potentially significant upfront capital equipment cost reductions by allowing the use of smaller pipes, pumps, heat exchangers, and storage tanks as well as reductions in operational costs. This report presents the first-phase results of assessment of impact of the advanced fluids on DHC systems. Future reports will focus on assessment of impact on hardware performance, capital eqiupment, and operation costs. 9 refs., 30 figs., 2 tab.