Download or read book Role of Initial Moisture Content on Hygrothermal Models and Envelope Performance written by Carly May Wagner and published by . This book was released on 2020 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: Countless inputs are used in transient hygrothermal analysis, just as countless variables determine the long-term hygrothermal performance of a real-world building envelope assembly. One variable often overlooked, oversimplified, and inaccurately accounted for is the initial moisture content of materials. This paper discusses the impact initial moisture content has on both the real-world performance and the accuracy of the modeled hygrothermal performance. ASHRAE Standard 160, Criteria for Moisture-Control Design Analysis in Buildings , provides guidelines for assumptions of initial moisture content inputs in hygrothermal analysis. These guidelines are generic in nature and are not necessarily representative of in-service conditions. The authors conducted a study to explore the role that a range of inputs have on the accuracy of hygrothermal models. Temperature and humidity data across a wall assembly along with all necessary interior and exterior climate data were collected over the course of several seasons. The data were used to develop a series of WUFI models, attempting to validate these models and the default or recommended inputs. The study indicated that the models did not accurately reflect the data recorded in the field unless values for the initial moisture content matched what was recorded in the field rather than the default ASHRAE 160 recommended values. This study, and several other real-world cases where excessive initial moisture content has led to envelope failures, highlights the importance of accurately accounting for initial moisture content. Particularly in the cases of renovations and restoration projects, methods are available to determine realistic values of the initial moisture content within the existing materials. Appropriate methods for determining the initial moisture content of materials comprising existing envelope assemblies are discussed, including the methods contained within the new standard ASTM E3069-19, Standard Guide for Evaluation and Rehabilitation of Mass Masonry Walls for Changes to Thermal and Moisture Properties of the Wall.
Download or read book Research Paper FPL RP written by and published by . This book was released on 1986 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Research in Building Physics written by J. Carmeliet and published by CRC Press. This book was released on 2020-12-17 with total page 1037 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text provides a broad view of the research performed in building physics at the start of the 21st century. The focus of this conference was on combined heat and mass flow in building components, performance-based design of building enclosures, energy use in buildings, sustainable construction, users' comfort and health, and the urban micro-climate.
Download or read book Standard Guide for Characterization and Use of Hygrothermal Models for Moisture Control Design in Building Envelopes written by and published by . This book was released on with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Building Performance Simulation for Design and Operation written by Jan L.M. Hensen and published by Routledge. This book was released on 2019-04-24 with total page 922 pages. Available in PDF, EPUB and Kindle. Book excerpt: When used appropriately, building performance simulation has the potential to reduce the environmental impact of the built environment, to improve indoor quality and productivity, as well as to facilitate future innovation and technological progress in construction. Since publication of the first edition of Building Performance Simulation for Design and Operation, the discussion has shifted from a focus on software features to a new agenda, which centres on the effectiveness of building performance simulation in building life cycle processes. This new edition provides a unique and comprehensive overview of building performance simulation for the complete building life cycle from conception to demolition, and from a single building to district level. It contains new chapters on building information modelling, occupant behaviour modelling, urban physics modelling, urban building energy modelling and renewable energy systems modelling. This new edition keeps the same chapter structure throughout including learning objectives, chapter summaries and assignments. Moreover, the book: • Provides unique insights into the techniques of building performance modelling and simulation and their application to performance-based design and operation of buildings and the systems which service them. • Provides readers with the essential concepts of computational support of performance-based design and operation. • Provides examples of how to use building simulation techniques for practical design, management and operation, their limitations and future direction. It is primarily intended for building and systems designers and operators, and postgraduate architectural, environmental or mechanical engineering students.
Download or read book Energy Materials Coordinating Committe EMaCC Fiscal Year 2004 Annual Technical Report written by and published by DIANE Publishing. This book was released on with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hygrothermal Performance of Building Components and Building Elements Assessment of Moisture Transfer by Numerical Simulation written by British Standards Institute Staff and published by . This book was released on 2007-08-31 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Construction systems parts, Construction materials, Moisture, Moisture measurement, Water absorption, Water vapour, Condensation, Humidity, Rainfall, Heat transfer, Drying, Mathematical calculations, Simulation, Thermal design of buildings
Download or read book Sensitivity of Hygrothermal Analysis to Uncertainty in Rain Data written by Steve Cornick and published by . This book was released on 2009 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper describes a small study carried out using a hygrothermal simulation tool to investigate the sensitivity of wall performance results to uncertainty in the amount of rain impinging on the wall. Design standards for hygrothermal analysis of proposed designs include methods for selecting appropriate moisture reference years and specify the amount of water that is assumed to intrude into the wall. Weather data used as input for modeling purposes is generally assumed to be reliable, but recent work has shown that there may be considerable uncertainty in the rainfall data. A small study was carried out to investigate the effect of uncertainty of rainfall data on the hygrothermal performance of a typical residential building envelope. Most hygrothermal models require fully populated hourly datasets, which include rain data. Many locations, however, do not have this kind of data although many have qualitative rain data. Ten locations with rain gage data were chosen as typical of most regions of Canada, except for the far north. Different methods in estimating rainfall were considered as well as variations on the amount of rain data were subsequently made. Several performance criteria, including total moisture content and a mold index, were compared. Although the choice of which method for deriving quantities of water from qualitative codes does cause differences in the hygrothermal response and consequently the performance criteria, these differences appear to be manageable. It is suggested that practitioners should show their awareness of the probable level of uncertainty by stating error bands for their predictions of performance. It should be emphasized that the sources of uncertainty dealt with in this small study are not the only ones, but that they do focus on water entry through leakage paths. The natures of the leakage paths likely introduce greater uncertainty, and should also be borne in mind.
Download or read book Application of Bamboo in Building Envelope written by Zujian Huang and published by Springer. This book was released on 2019-05-14 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book offers a comprehensive overview of the use of bamboo in building industry. It systematically demonstrates bamboo’s utility in terms of its properties, describing the material properties of typical industrial bamboo products, and discussing their performance evaluation and optimization as building components and in the creation of building envelopes. The book also includes examples of the high-value utilization of bamboo forest resources. Further, it examines how building performance may be affected by conditions such as climate. Including insights from material science, construction design, building physics and building climatology, the book also provides data obtained from technology and market status investigation, laboratory test and the computer simulation.This book appeals to scientists and professionals, as it introduces and tests various bamboo products, demonstrating the advantages and disadvantages for each one. The book is also a valuable resource for civil engineers and students interested in this unique plant material and its application in the building industry.
Download or read book Research in Building Physics and Building Engineering written by Paul Fazio and published by CRC Press. This book was released on 2020-11-25 with total page 1009 pages. Available in PDF, EPUB and Kindle. Book excerpt: Buildings influence people. They account for one third of energy consumption across the globe and represent an annual capital expenditure of 7%-10% of GNP in industrialized countries. Their lifetime operation costs can exceed capital investment. Building Engineering aims to make buildings more efficient, safe and economical. One branch of this discipline, Building Physics/Science, has gained prominence, with a heightened awareness of such phenomena as sick buildings, the energy crisis and sustainability, and considering the performance of buildings in terms of climatic loads and indoor conditions. The book reflects the advanced level and high quality of research which Building Engineering, and Building Physics/Science in particular, have reached at the beginning of the twenty-first century. It will be a valuable resource to: engineers, architects, building scientists, consultants on the building envelope, researchers and graduate students.
Download or read book Thermal Insulation and Radiation Control Technologies for Buildings written by Jan Kośny and published by Springer Nature. This book was released on 2022-06-06 with total page 487 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book offers a unique treatment of building insulating products and the integration of these products with building components. This book was written for all those involved in building design, specification, construction, and commissioning, providing them with an understanding of and appreciation for the wide variety of thermal insulation products and technologies available for use in all types of buildings. The book proceeds from basic definitions and discussion of heat-transfer topics and thermal insulation concepts, to the design and use of these products. The impact of thermal insulation on dynamic building performance, including factors other than heating and cooling, is also discussed. The book does not require an advanced mathematical background. The authors provide sufficient information to provide a qualitative understanding, with more mathematical sections included for those interested in modeling and analysis. The basic physics associated with heat transfer in buildings are presented, along with the steady-state and transient analysis techniques needed for the effective implementation of thermal insulation and assemblies. Modern building design involves the integration of comfort, safety, economics, durability and cost considerations, all of which impact the selection and use of thermal insulation materials in buildings. In addition to theoretical explanations of the underlying science, the book details the properties and application of new thermal insulation materials, including vacuum panels, gas-filled panels, aerogels, phase-change materials, and radiation control technologies. Given its scope, the book will be of interest to researchers and building engineers wishing to understand the latest technologies and materials available, so as to achieve reduced energy consumption in commercial and residential buildings.
Download or read book International Particleboard Composite Materials Symposium Proceedings written by and published by . This book was released on 2001 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Materials for Energy Efficiency and Thermal Comfort in Buildings written by Matthew R Hall and published by Elsevier. This book was released on 2010-04-21 with total page 761 pages. Available in PDF, EPUB and Kindle. Book excerpt: Almost half of the total energy produced in the developed world is inefficiently used to heat, cool, ventilate and control humidity in buildings, to meet the increasingly high thermal comfort levels demanded by occupants. The utilisation of advanced materials and passive technologies in buildings would substantially reduce the energy demand and improve the environmental impact and carbon footprint of building stock worldwide.Materials for energy efficiency and thermal comfort in buildings critically reviews the advanced building materials applicable for improving the built environment. Part one reviews both fundamental building physics and occupant comfort in buildings, from heat and mass transport, hygrothermal behaviour, and ventilation, on to thermal comfort and health and safety requirements.Part two details the development of advanced materials and sustainable technologies for application in buildings, beginning with a review of lifecycle assessment and environmental profiling of materials. The section moves on to review thermal insulation materials, materials for heat and moisture control, and heat energy storage and passive cooling technologies. Part two concludes with coverage of modern methods of construction, roofing design and technology, and benchmarking of façades for optimised building thermal performance.Finally, Part three reviews the application of advanced materials, design and technologies in a range of existing and new building types, including domestic, commercial and high-performance buildings, and buildings in hot and tropical climates.This book is of particular use to, mechanical, electrical and HVAC engineers, architects and low-energy building practitioners worldwide, as well as to academics and researchers in the fields of building physics, civil and building engineering, and materials science. - Explores improving energy efficiency and thermal comfort through material selection and sustainable technologies - Documents the development of advanced materials and sustainable technologies for applications in building design and construction - Examines fundamental building physics and occupant comfort in buildings featuring heat and mass transport, hygrothermal behaviour and ventilation
Download or read book Encyclopedia of Renewable and Sustainable Materials written by and published by Elsevier. This book was released on 2020-01-09 with total page 4238 pages. Available in PDF, EPUB and Kindle. Book excerpt: Encyclopedia of Renewable and Sustainable Materials, Five Volume Set provides a comprehensive overview, covering research and development on all aspects of renewable, recyclable and sustainable materials. The use of renewable and sustainable materials in building construction, the automotive sector, energy, textiles and others can create markets for agricultural products and additional revenue streams for farmers, as well as significantly reduce carbon dioxide (CO2) emissions, manufacturing energy requirements, manufacturing costs and waste. This book provides researchers, students and professionals in materials science and engineering with tactics and information as they face increasingly complex challenges around the development, selection and use of construction and manufacturing materials. Covers a broad range of topics not available elsewhere in one resource Arranged thematically for ease of navigation Discusses key features on processing, use, application and the environmental benefits of renewable and sustainable materials Contains a special focus on sustainability that will lead to the reduction of carbon emissions and enhance protection of the natural environment with regard to sustainable materials
Download or read book Water Problems in Building Exterior Walls written by Jon M. Boyd and published by ASTM International. This book was released on 1999 with total page 335 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Moisture Occurrence in Roof Assemblies Containing Moisture Storing Insulation and Its Impact on the Durability of Building Envelope written by and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ASHRAE Handbook written by and published by . This book was released on 2005 with total page 1050 pages. Available in PDF, EPUB and Kindle. Book excerpt:
