Indoor And Outdoor Radiant Cooling Systems For Buildings
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Indoor And Outdoor Radiant Cooling Systems For Buildings
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Author : Ardeshir Moftakhari
language : en
Publisher:
Release Date : 2022
Indoor And Outdoor Radiant Cooling Systems For Buildings written by Ardeshir Moftakhari and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022 with categories.
Heating, Ventilation and Air Conditioning (HVAC) systems account for a major portion of overall energy consumption in buildings. Most HVAC systems use conventional and well established all-air thermal distribution systems that rely on convection as the major heat transfer mechanism for heat extraction. However, energy conservation efforts encouraged research related to radiant systems that can improve efficiency of HVAC systems. Radiant systems can be integrated into the building envelope by means of radiant cooling panels or slabs. These systems can increase the efficiency of the HVAC system by allowing chillers to operate more efficiently at a higher chilled water temperature compared to all-air systems. Another example of using radiative heat transfer for energy efficiency is in systems that use exterior spectrally-selective surfaces to intensively radiate heat to the outer space under suitable atmospheric conditions or passive radiative cooling (PRC). These systems utilize materials with high albedo coating and emit thermal infrared radiation that exploits the atmospheric window, resulting in sub-ambient surface temperatures, even during sunny days. Both indoor and outdoor radiant cooling systems need further development before they show full potential for increasing building energy efficiency. However, there are many questions about these systems that need to be addressed. For indoor radiant cooling systems, there is no clearly defined design process. Currently, design relies on procedures developed for all air systems, which in some situations are systems that cannot deliver the load when considering effective control of indoor environmental conditions. Also, there is a need for better understanding of the dynamics of heat transfer in rooms with radiant cooling systems and inclusion of this into the design procedure. When considering novel outdoor radiant cooling systems, all engineering aspects of these systems are very much unknown as these systems just emerged and there are few full-scale prototypes. From the theoretical studies (Zhu et al., 2013), we know that these PRC systems that are based on selective surfaces can produce cooling power of up to 100 (W/m2); however, there is little to no information how ambient condition, application specifics, and material affects performance of these systems. Additionally, there are no models associated with selective PRC films that can be implemented in the design or energy performance modeling tools. My PhD thesis work utilizes the state-of-the-art facilities, such as Thermal Façade lab and Roof Testing lab at the University of Texas at Austin, to conduct a set of full-scale experiments and combine experimental results with analytical and numerical modeling to address several research and engineering challenges related to the system design process, operation and energy performance. Specifically, my dissertation: (a) investigates the complex heat transfer dynamics of spaces conditioned with radiant cooling panels, (b) develops a system design that integrates building thermal response to these radiant cooling systems, (c) advances the system control strategy by integrating all influencing parameters in the model that provides optimal thermal comfort and energy saving, (d) evaluates thermal performance of PRC-based roofs in a full-scale prototype, and (e) develops sky radiation models for energy analysis of the PRC-based roofing technology. The research builds upon fundamental science and principles while the findings are incorporated in the ASHRAE and other relevant building design guidelines used worldwide by HVAC designers and practitioners
Thermal Comfort And Energy Efficient Cooling Of Nonresidential Buildings
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Author : Doreen E. Kalz
language : en
Publisher: Springer Science & Business Media
Release Date : 2014-03-26
Thermal Comfort And Energy Efficient Cooling Of Nonresidential Buildings written by Doreen E. Kalz 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 2014-03-26 with Technology & Engineering categories.
This book supports HVAC planners in reducing the cooling energy demand, improving the indoor environment and designing more cost-effective building concepts. High performance buildings have shown that it is possible to go clearly beyond the energy requirements of existing legislation and obtaining good thermal comfort. However, there is still a strong uncertainty in day-to-day practice due to the lack of legislative regulations for mixed-mode buildings which are neither only naturally ventilated nor fully air-conditioned, but use a mix of different low-energy cooling techniques. Based on the findings from monitoring campaigns (long-term measurements in combination with field studies on thermal comfort), simulation studies, and a comprehensive review on existing standards and guidelines, this book acts as a commonly accessible knowledge pool for passive and low-energy cooling techniques.
Passive Low Energy Cooling Of Buildings
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Author : Baruch Givoni
language : en
Publisher: John Wiley & Sons
Release Date : 1994-07-27
Passive Low Energy Cooling Of Buildings written by Baruch Givoni 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 1994-07-27 with Technology & Engineering categories.
A practical sourcebook for building designers, providing comprehensive discussion of the impact of basic architectural choices on cooling efficiency, including the layout and orientation of the structure, window size and shading, exterior color, and even the use of plantings around the site. All major varieties of passive cooling systems are presented, with extensive analysis of performance in different types of buildings and in different climates: ventilation; radiant cooling; evaporative cooling; soil cooling; and cooling of outdoor spaces.
Radiant Cooling In Us Office Buildings
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Author : Corina Stetiu
language : en
Publisher:
Release Date : 1997
Radiant Cooling In Us Office Buildings written by Corina Stetiu and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with categories.
Radiant Heating And Cooling Handbook
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Author : Richard Watson
language : en
Publisher: McGraw Hill Professional
Release Date : 2002-01-29
Radiant Heating And Cooling Handbook written by Richard Watson and has been published by McGraw Hill Professional this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002-01-29 with Technology & Engineering categories.
Design radiant heating and cooling systems with help from top experts The first and only professional guide of its kind, Radiant Heating and Cooling Handbook is packed with tools that make the work of HVAC systems designers, engineers, and technicians go more smoothly and easily. Relating heating and cooling theory to the principles of thermal comfort, this expert handbook by pros Richard Watson and Kirby Chapman provides all the help you need to select, design, size, and position the most popular and efficient systems for industrial, commercial, and residential applications. You get: *Case studies that clarify application and installation of every system type *Models for coupling radiant and forced air heating and cooling for the ultimate in comfortable, energy-saving interiors *Examples and sample calculations to solve real-world radiant heating and cooling problems in building, contracting, and engineering *Equations, strategies, and analyses to help you set parameters from sizing and cost to human comfortability
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.
Passive Cooling Of Buildings
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Author : D. Asimakopoulos
language : en
Publisher: Routledge
Release Date : 2013-10-31
Passive Cooling Of Buildings written by D. Asimakopoulos and has been published by Routledge this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-10-31 with Architecture categories.
Energy use in buildings in the EU represents about 40% of the total annual energy consumption. With greater awareness of the need to reduce energy consumption comes a growth of interest in passive cooling, particularly as an alternative to air-conditioning. This book describes the fundamentals of passive cooling together with the principles and formulae necessary for its successful implementation. The material is comprised largely of information and results compiled under the SAVE European Research Programme.
Advances In Passive Cooling
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Author : Mat Santamouris
language : en
Publisher: Earthscan
Release Date : 2012-05-16
Advances In Passive Cooling written by Mat Santamouris and has been published by Earthscan this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-05-16 with Architecture categories.
Following a rapid increase in the use of air conditioning in buildings of all types, the energy demand for powering such devices has become a significant cause for concern. Passive cooling is increasingly being thought of as the best alternative to air conditioning.This book offers the latest knowledge and techniques on passive cooling, enabling building professionals to understand the state of the art and employ relevant new strategies. With separate chapters on comfort, urban microclimate, solar control, ventilation, ground cooling and evaporative and radiative cooling, this authoritative text will also be invaluable for architects, engineers and students working on building physics and low-energy design.Advances in Passive Cooling is part of the BEST series, edited by Mat Santamouris. The aim of the series is to present the most current, high quality theoretical and application oriented material in the field of solar energy and energy efficient buildings. Leading international experts cover the strategies and technologies that form the basis of high-performance, sustainable buildings, crucial to enhancing our built and urban environment.
Climatic Design
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Author : Donald Watson
language : en
Publisher: McGraw-Hill Companies
Release Date : 1983
Climatic Design written by Donald Watson and has been published by McGraw-Hill Companies this book supported file pdf, txt, epub, kindle and other format this book has been release on 1983 with Architecture categories.
An updated paperback re-issue of the guide to energy-efficient building design based on local climate. Table of Contents--Introduction; Part I: Principles (1) Heat and People; (2) Comfort and Indoor Climate; (3) Strategies of Climate Control; (4) Promote Solar Gain; (5) Minimize Conductive Heat Flow; (6) Minimize Infiltration; (7) Minimize Solar Gain; (8) Promote Ventilation; (9) Promote Radiant Cooling; (10) Promote Evaporative Cooling - Roof Systems; (11) Promote Conductive Cooling; (12) Appendices; Part II: Practices; Part III: Climatic Data; Part IV: Bibliography. Index. 285 illustrations.
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.