Simulation Of Radiant Cooling Performance With Evaporative Cooling Sources
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Simulation Of Radiant Cooling Performance With Evaporative Cooling Sources
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Author : Timothy Charles Moore
language : en
Publisher:
Release Date : 2008
Simulation Of Radiant Cooling Performance With Evaporative Cooling Sources written by Timothy Charles Moore and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with categories.
Development Of A Simulation Tool To Evaluate The Performance Of Radiant Cooling Ceilings
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Author :
language : en
Publisher:
Release Date : 1995
Development Of A Simulation Tool To Evaluate The Performance Of Radiant Cooling Ceilings written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with categories.
Considerable electrical energy used to cool nonresidential buildings equipped with All-Air Systems is drawn by the fans that transport the cool air through the thermal distribution system. Hydropic Cooling Systems have the potential to reduce the amount of air transported through the building by separating the tasks of ventilation and thermal conditioning. Due to the physical properties of water, Hydropic Cooling Systems can transport a given amount of thermal energy using less than 5% of the otherwise necessary fan energy. They are suited to the dry climates that are typical of California and been used for more than 30 years in hospital rooms. However, energy savings and peak-load characteristics have not yet been analyzed. Adequate guidelines for their design and control systems has prevented lack of their widespread application to other building types. Evaluation of theoretical performance of Hydropic Systems could be made by computer models. Energy analysis programs such as DOE-2 do not yet have the capacity to simulate Hydropic Cooling Systems. Scope of this project is developing a model that can accurately simulate the dynamic performance of Hydropic Radiant Cooling Systems. The model can calculate loads, heat extraction rates, room air temperature and room surface temperature distributions, and can be used to evaluate issues such as thermal comfort, controls, system sizing, system configuration and dynamic response. The model was created with the LBL Simulation Problem Analysis and Research Kernel (SPARK), which provides a methodology for describing and solving the dynamic, non-linear equations that correspond to complex physical systems. Potential for Hydropic Radiant Cooling Systems applications can be determined by running this model for a variety of construction types in different California climates.
Passive Solar Architecture Pocket Reference
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Author : Ken Haggard
language : en
Publisher: Routledge
Release Date : 2016-04-01
Passive Solar Architecture Pocket Reference written by Ken Haggard and has been published by Routledge this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-04-01 with Architecture categories.
Our pocket reference books provide a wealth of practical information at your fingertips, whenever you need it. Rich in background detail, at-a-glance tables and diagrams, equations, and more, the Passive Solar Architecture Pocket Reference is a handy resource for architects, engineers and students. Coverage includes: definitions load determinants and Responses (including world wide biomes and climates, building metabolism and response, thermal sources and sinks, passive building responses to sources and sinks, tuning the building to the environment, optimizing insulation & thermal mass for comfort) contextual aspects (including microclimate and siting, temperatures, humidity, wind, radiation and comfort parameters passive components (including building envelope, passive solar terminology, orientation, apertures and glazing, thermal storage, thermal control and materials design tools (including sun path diagrams, sun peg diagrams, air flow relationships, thermal modelling and life cycle design specific functions (including passive heating, passive cooling and ventilation, natural lighting, passive water heating, resource collection and integrated design).
Desiccant Assisted Cooling
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Author : Carlos Eduardo Leme Nóbrega
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-11-19
Desiccant Assisted Cooling written by Carlos Eduardo Leme Nóbrega and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-11-19 with Technology & Engineering categories.
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.
Proceedings Of The 8th International Symposium On Heating Ventilation And Air Conditioning
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Author : Angui Li
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-09-24
Proceedings Of The 8th International Symposium On Heating Ventilation And Air Conditioning written by Angui Li and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-09-24 with Technology & Engineering categories.
Proceedings of the 8th International Symposium on Heating, Ventilation and Air Conditioning is based on the 8th International Symposium of the same name (ISHVAC2013), which took place in Xi’an on October 19-21, 2013. The conference series was initiated at Tsinghua University in 1991 and has since become the premier international HVAC conference initiated in China, playing a significant part in the development of HVAC and indoor environmental research and industry around the world. This international conference provided an exclusive opportunity for policy-makers, designers, researchers, engineers and managers to share their experience. Considering the recent attention on building energy consumption and indoor environments, ISHVAC2013 provided a global platform for discussing recent research on and developments in different aspects of HVAC systems and components, with a focus on building energy consumption, energy efficiency and indoor environments. These categories span a broad range of topics, and the proceedings provide readers with a good general overview of recent advances in different aspects of HVAC systems and related research. As such, they offer a unique resource for further research and a valuable source of information for those interested in the subject. The proceedings are intended for researchers, engineers and graduate students in the fields of Heating, Ventilation and Air Conditioning (HVAC), indoor environments, energy systems, and building information and management. Angui Li works at Xi’an University of Architecture and Technology, Yingxin Zhu works at Tsinghua University and Yuguo Li works at The University of Hong Kong.
Radiant Cooling In Us Office Buildings
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Author :
language : en
Publisher:
Release Date : 1998
Radiant Cooling In Us Office Buildings written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with categories.
Much attention is being given to improving the efficiency of air-conditioning systems through the promotion of more efficient cooling technologies. One such alternative, radiant cooling, is the subject of this thesis. Performance information from Western European buildings equipped with radiant cooling systems indicates that these systems not only reduce the building energy consumption but also provide additional economic and comfort-related benefits. Their potential in other markets such as the US has been largely overlooked due to lack of practical demonstration, and to the absence of simulation tools capable of predicting system performance in different climates. This thesis describes the development of RADCOOL, a simulation tool that models thermal and moisture-related effects in spaces equipped with radiant cooling systems. The thesis then conducts the first in-depth investigation of the climate-related aspects of the performance of radiant cooling systems in office buildings. The results of the investigation show that a building equipped with a radiant cooling system can be operated in any US climate with small risk of condensation. For the office space examined in the thesis, employing a radiant cooling system instead of a traditional all-air system can save on average 30% of the energy consumption and 27% of the peak power demand due to space conditioning. The savings potential is climate-dependent, and is larger in retrofitted buildings than in new construction. This thesis demonstrates the high performance potential of radiant cooling systems across a broad range of US climates. It further discusses the economics governing the US air-conditioning market and identifies the type of policy interventions and other measures that could encourage the adoption of radiant cooling in this market.
Development Of A Model To Simulate The Performance Of Hydronic Radiant Cooling Ceilings
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Author :
language : en
Publisher:
Release Date : 1995
Development Of A Model To Simulate The Performance Of Hydronic Radiant Cooling Ceilings written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with categories.
A significant amount of the electrical energy used to cool non-residential buildings equipped with all-air systems is drawn by the fans that transport the cool air through the thermal distribution system. Hydronic radiant cooling systems have the potential to reduce the amount of air transported through the building by separating the tasks of ventilation and thermal conditioning. Because of the physical properties of water, hydronic radiant cooling systems can transport a given amount of thermal energy using less than 5170 of the otherwise necessary fan energy. This improvement alone significantly reduces the energy consumption and peak power requirement of the air conditioning system. Hydronic radiant cooling systems have been used for more than 30 years in hospital rooms to provide a draft-free, thermally stable environment. The energy savings and peak-load characteristics of these systems have not yet been analyzed systematically. Moreover, adequate guidelines for design and control of these systems do not exist. This has prevented their widespread application to other building types. The evaluation of the theoretical performance of hydronic systems could be made most conveniently by computer models. Energy analysis programs such as DOE-2 do not have the capability to simulate hydronic radiant systems yet. In this paper the development of a model that can simulate accurately the dynamic performance of hydronic radiant cooling systems is described. The model is able to calculate loads, heat extraction rates, room air temperature and room surface temperature distributions, and can be used to evaluate issues such as thermal comfort, controls, system sizing, system configuration and dynamic response. The model was created with the Simulation Problem Analysis and Research Kernel (SPARK) developed at the Lawrence Berkeley Laboratory, which provides a methodology for describing and solving the dynamic, non-linear equations that correspond to complex physical systems.
Engineering Principles Modeling And Economics Of Evaporative Coolers
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Author : Daniel Ingo Hefft
language : en
Publisher: Academic Press
Release Date : 2023-07-10
Engineering Principles Modeling And Economics Of Evaporative Coolers written by Daniel Ingo Hefft and has been published by Academic Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-07-10 with Technology & Engineering categories.
Engineering Principles, Modelling and Economics of Evaporative Coolers covers the basic engineering and technical principles behind the operation and construction of evaporative coolers, also highlighting challenges. The book presents the reader with selected case studies on modelling in the cooling chamber and explains the economic implications an evaporative structure can bring. Edited by a team of specialists, the book also explains the strong dependence of the technology’s performance on environmental conditions, and hence the limits on temperature control in the preservation of post-harvest agriculture products. Evaporative coolers are an ancient technology, invented long before the introduction of chemical refrigerants as used in modern fridges or cooling towers. This two volume set covers the topic, with practical applications, construction techniques, and operation of the technology. Thoroughly explores unit operations and engineering principles of evaporative coolers Includes CFD modelling on evaporative cooling structures Covers the economics of evaporative coolers
Optimization Of Water And Energy Use In Indirect Evaporative Cooling System By Cfd
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Author : Mansi Vijay Prajapati
language : en
Publisher:
Release Date : 2017
Optimization Of Water And Energy Use In Indirect Evaporative Cooling System By Cfd written by Mansi Vijay Prajapati and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017 with Air conditioning categories.
Data center cooling is becoming important to maintain environmental condition for ITEInformation technology equipment. Conventional evaporative wet cooling media lowers the temperature of the dry bulb temperature of incoming air in which heat transfer to water film and sensibly cool the product air by increasing moisture into air. Wet cooling media technique requires large quantity of clean water, which is reducing area where water is very less. Therefore, indirect evaporative cooling is good alternative. Chiller plants/Indirect Evaporative cooling(IEC) are used as a cooling source for larger data centers as they are more efficient in heat transfer without adding moisture into product air. In this study, Chilled water is supplied to the heat exchanger unit ASC- 8 row copper coils indirect heat exchanger. Hot air stream across the coils transfer heat energy to the chilled water inside the coil and excessive moisture in secondary air will be condensed before the outlet as it will reach to the dew point. Focus of this study is to identify the various configurations for cooling coils. Parametric study has been carried out to show the impact of both water and air velocities on coil performance. Variable primary flow of water in chilled water cooling unit has been studied to improve efficiency with reducing pumping power. Weather bin analysis of DFW area for several months has been done. Optimization of coil design has been studied by maintaining balance with coil face area, air pressure drop, and water pressure drop parameters. Numerical simulation data has been validated with Aztek indirect evaporative cooling unit.
Design Energy Simulation For Architects
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Author : Kjell Anderson
language : en
Publisher: Routledge
Release Date : 2014-01-23
Design Energy Simulation For Architects written by Kjell Anderson and has been published by Routledge this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-01-23 with Architecture categories.
Leading architectural firms are now using in-house design simulation to help make more sustainable design decisions. Taking advantage of these new tools requires understanding of what can be done with simulation, how to do it, and how to interpret the results. This software-agnostic book, which is intended for you to use as a professional architect, shows you how to reduce the energy use of all buildings using simulation for shading, daylighting, airflow, and energy modeling. Written by a practicing architect who specializes in design simulation, the book includes 30 case studies of net-zero buildings, as well as of projects with less lofty goals, to demonstrate how energy simulation has helped designers make early decisions. Within each case study, author Kjell Anderson mentions the software used, how the simulation was set up, and how the project team used the simulation to make design decisions. Chapters and case studies are written so that you learn general concepts without being tied to particular software. Each chapter builds on the theory from previous chapters, includes a summary of concept-level hand calculations (if applicable), and gives comprehensive explanations with graphic examples. Additional topics include simulation basics, comfort, climate analysis, a discussion on how simulation is integrated into some firms, and an overview of some popular design simulation software.