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PCM-Enhanced Building Components

2015-05-07 Technology & Engineering
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Release : 2015-05-07
Genre : Technology & Engineering
Kind : eBook
Book Rating : 860/5 ( reviews)

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Book Synopsis PCM-Enhanced Building Components by : Jan Kośny

Download or read book PCM-Enhanced Building Components written by Jan Kośny. This book was released on 2015-05-07. Available in PDF, EPUB and Kindle. Book excerpt: Presenting an overview of the use of Phase Change Materials (PCMs) within buildings, this book discusses the performance of PCM-enhanced building envelopes. It reviews the most common PCMs suitable for building applications, and discusses PCM encapsulation and packaging methods. In addition to this, it examines a range of PCM-enhanced building products in the process of development as well as examples of whole-building-scale field demonstrations. Further chapters discuss experimental and theoretical analyses (including available software) to determine dynamic thermal and energy performance characteristics of building enclosure components containing PCMs, and present different laboratory and field testing methods. Finally, a wide range of PCM building products are presented which are commercially available worldwide. This book is intended for students and researchers of mechanical, architectural and civil engineering and postgraduate students of energy analysis, dynamic design of building structures, and dynamic testing procedures. It also provides a useful resource for professionals involved in architectural and mechanical-civil engineering design, thermal testing and PCM manufacturing.

PCM-Based Building Envelope Systems

2020-01-23 Architecture
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Release : 2020-01-23
Genre : Architecture
Kind : eBook
Book Rating : 350/5 ( reviews)

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Book Synopsis PCM-Based Building Envelope Systems by : Benjamin Duraković

Download or read book PCM-Based Building Envelope Systems written by Benjamin Duraković. This book was released on 2020-01-23. Available in PDF, EPUB and Kindle. Book excerpt: PCM Enhanced Building Envelopes presents the latest research in the field of thermal energy storage technologies that can be applied to solar heating and cooling with the aim of shifting and reducing building energy demand. It discusses both practical and technical issues, as well as the advantages of using common phase change materials (PCMs) in buildings as a more efficient, novel solution for passive solar heating/cooling strategies. The book includes qualitative and quantitative descriptions of the science, technology and practices of PCM-based building envelopes, and reflects recent trends by placing emphasis on energy storage solutions within building walls, floors, ceilings, façades, windows, and shading devices. With the aim of assessing buildings’ energy performance, the book provides advanced modeling and simulation tools as a theoretical basis for the analysis of PCM-based building envelopes in terms of heat storage and transfer. This book will be of interest to all those dealing with building energy analysis such as researchers, academics, students and professionals in the fields of mechanical and civil engineering and architectural design

Field Testing of Nano-PCM Enhanced Building Envelope Components

2013
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Release : 2013
Genre :
Kind : eBook
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Book Synopsis Field Testing of Nano-PCM Enhanced Building Envelope Components by :

Download or read book Field Testing of Nano-PCM Enhanced Building Envelope Components written by . This book was released on 2013. Available in PDF, EPUB and Kindle. Book excerpt: The U.S. Department of Energy s (DOE) Building Technologies Program s goal of developing high-performance, energy efficient buildings will require more cost-effective, durable, energy efficient building envelopes. Forty-eight percent of the residential end-use energy consumption is spent on space heating and air conditioning. Reducing envelope-generated heating and cooling loads through application of phase change material (PCM)-enhanced envelope components can facilitate maximizing the energy efficiency of buildings. Field-testing of prototype envelope components is an important step in estimating their energy benefits. An innovative phase change material (nano-PCM) was developed with PCM encapsulated with expanded graphite (interconnected) nanosheets, which is highly conducive for enhanced thermal storage and energy distribution, and is shape-stable for convenient incorporation into lightweight building components. During 2012, two test walls with cellulose cavity insulation and prototype PCM-enhanced interior wallboards were installed in a natural exposure test (NET) facility at Charleston, SC. The first test wall was divided into four sections, which were separated by wood studs and thin layers of foam insulation. Two sections contained nano-PCM-enhanced wallboards: one was a three-layer structure, in which nano-PCM was sandwiched between two gypsum boards, and the other one had PCM dispersed homogeneously throughout graphite nanosheets-enhanced gypsum board. The second test wall also contained two sections with interior PCM wallboards; one contained nano-PCM dispersed homogeneously in gypsum and the other was gypsum board containing a commercial microencapsulated PCM (MEPCM) for comparison. Each test wall contained a section covered with gypsum board on the interior side, which served as control or a baseline for evaluation of the PCM wallboards. The walls were instrumented with arrays of thermocouples and heat flux transducers. Further, numerical modeling of the walls containing the nano-PCM wallboards were performed to determine their actual impact on wall-generated heating and cooling loads. The models were first validated using field data, and then used to perform annual simulations using Typical Meteorological Year (TMY) weather data. This article presents the measured performance and numerical analysis to evaluate the energy-saving potential of the nano-PCM-enhanced building components.

Lab-Scale Dynamic Thermal Testing of PCM-Enhanced Building Materials

2014 Building materials
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Release : 2014
Genre : Building materials
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Book Synopsis Lab-Scale Dynamic Thermal Testing of PCM-Enhanced Building Materials by : Nitin Shukla

Download or read book Lab-Scale Dynamic Thermal Testing of PCM-Enhanced Building Materials written by Nitin Shukla. This book was released on 2014. Available in PDF, EPUB and Kindle. Book excerpt: Previous research studies have shown that incorporation of the phase-change material (PCM) in a building envelope material/component may bring significant reduction in the building energy consumption. A detailed knowledge of the key phase-transition (dynamic) properties, such as latent heat, sub-cooling, hysteresis during melting and freezing, etc., of the PCM-enhanced building materials is required to perform the whole building energy simulations and code work. In addition, the dynamic test data is critical in optimizing the distribution and location of the PCM within a building to maximize the energy savings. Until recently, the differential scanning calorimeter (DSC) has been the only available method to determine the dynamic properties of a PCM. Unfortunately, the DSC method is valid for small and homogeneous specimens, and is incapable of capturing the complexities observed in large-scale building components. Materials with non-uniform temperature distribution and non-homogeneity caused by the presence of additives, such as fire retardants, conduction inhibitors, and adhesives, cannot be analyzed by the DSC testing method. Dynamic heat-flow meter apparatus (DHFMA) is a recently developed method for dynamic property measurement of system-scale PCM and other building construction products. Although the DHFMA method is gaining acceptance among the scientific and research community, it is still under development. In this study, we focus on advancing the development, and conducting the validation of the DHFMA method. A detailed description of the DHFMA method is presented to highlight the difference with the conventional HFMA method. Next, a large-scale bio-based shape-stabilized PCM (ss-PCM) sample was tested using both DHFMA and DSC test methods. Specific heat as a function of temperature data measured by DHFMA method was found to be in very good agreement with slowest ramp and step data. This is the first direct verification of the HFMA method with the DSC method for PCMs.

Phase Change Material (PCM) - Enhanced Envelopes for Energy-efficient Commerical Buildings

2012
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Release : 2012
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Book Synopsis Phase Change Material (PCM) - Enhanced Envelopes for Energy-efficient Commerical Buildings by : Peña Victoria Louremy

Download or read book Phase Change Material (PCM) - Enhanced Envelopes for Energy-efficient Commerical Buildings written by Peña Victoria Louremy. This book was released on 2012. Available in PDF, EPUB and Kindle. Book excerpt: The building sector is the largest consumer of energy in the United States, and accounts for nearly 40 percent of the total U.S. primary energy use, surpassing the transportation and industry sectors [1]. Due to the sheer magnitude of the commercial building energy consumption and the increasing annual growth of energy consumed per year there have been numerous efforts over the past three decades to design buildings with lower energy intensity [1]. In this thesis, the favorable thermal properties of the building envelope materials known as phase change materials (PCM) were investigated to reduce the heating, ventilating, and air conditioning (HVAC) loads of simulated commercial buildings. To examine the performance of PCMs, the thermal properties of an organic PCM sample were embedded into the exterior building envelope of a strip mall building model from National Renewable Energy Laboratory (NREL) in the EnergyPlus Building Energy Simulation Program (BESP) for three different climate zones. Collectively, the PCM-enhanced roofing and exterior wall construction installed in the EnergyPlus mercantile strip mall building model had minimal impacts on the annual building energy consumption. Opportunities for future research on PCM-enhanced building envelope construction exist in the use of isothermal step mode rather than traditional dynamic mode for the DSC testing of PCMs, the development of a PCM BESP component that allows for the consideration of both phase change processes enthalpy curves, and large scale field testing of PCMs in place.

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