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"Buildings Thermal properties."
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Materials for Energy Efficiency and Thermal Comfort in Buildings
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.
eBook
Thermoactive foundations for sustainable buildings
This monograph documents the current of state-of-art in Thermo-Active Foundations (TAFs) suitable for efficiently and sustainably heat and cooling buildings. TAFs, also referred to as thermal or energy piles, offer innovative and sustainable alternatives to ground-source heat pumps as well as other conventional heating, ventilating, and air conditioning (HVAC) systems to heat and cool commercial as well as residential buildings in several regions in the world. In summary, this monograph collects the latest multi-disciplinary advances in modeling, designing, and monitoring TAFs. Ultimately, it is hoped that this monograph will provide a comprehensive reference for both researchers and professionals interested in structural and thermal performance of TAFs and their applications in developing integrated and sustainable equipment and systems for the built environment.
eBook
Improving Building Energy Efficiency through Measurement of Building Physics Properties Using Dynamic Heating Tests
Buildings contribute to nearly 30% of global carbon dioxide emissions, making a significant impact on climate change. Despite advanced design methods, such as those based on dynamic simulation tools, a significant discrepancy exists between designed and actual performance. This so-called performance gap occurs as a result of many factors, including the discrepancies between theoretical properties of building materials and properties of the same materials in buildings in use, reflected in the physics properties of the entire building. There are several different ways in which building physics properties and the underlying properties of materials can be established: a co-heating test, which measures the overall heat loss coefficient of the building; a dynamic heating test, which, in addition to the overall heat loss coefficient, also measures the effective thermal capacitance and the time constant of the building; and a simulation of the dynamic heating test with a calibrated simulation model, which establishes the same three properties in a non-disruptive way in comparison with the actual physical tests. This article introduces a method of measuring building physics properties through actual and simulated dynamic heating tests. It gives insights into the properties of building materials in use and it documents significant discrepancies between theoretical and measured properties. It introduces a quality assurance method for building construction and retrofit projects, and it explains the application of results on energy efficiency improvements in building design and control. It calls for re-examination of material properties data and for increased safety margins in order to make significant improvements in building energy efficiency.
Journal Article
SLEEP THERMAL COMFORT ON SUMMER NIGHTS IN MUD BRICK HOUSES AT THE ANCIENT VILLAGE OF EIN GEDI, ISRAEL
This article discusses the question if houses made of mud bricks in the ancient village of Ein Gedi during the Roman-Byzantine period could offer thermal comfort to their dwellers in the summers' hottest months when the minimum nighttime temperatures are above 30 degrees Celsius. This question was raised when an interesting artefact was found in one of the village houses that was ruined in the 6th C. CE. This artefact is the remains of carbonized wooden poles and a palm leaf mat, these most probably being the remains of a rope bed that was mentioned in historical sources and was common in the entire region. Cet article traite de la question de savoir si des maisons faites de briques de boue, dans l'ancien village d'Ein Gedi, au cours de la période romaine-byzantine, pouvaient offrir un confort thermique à leurs habitants dans les mois les plus chauds de l'ete, lorsque les températures nocturnes minimales sont au-dessus de 30 degrés Celsius. Cette question a été soulevée quand un artefact intéressant a été trouvé dans l'une des maisons du village détruite au cours du VIe siècle de notre ère. Cet artefact est les restes de poteaux en bois carbonises et d'une natte en feuilles de palmier, ceux-ci étant tres probablement les restes d'un lit de cordes qui était mentionné dans les sources historiques et était commun à toute la région.
Journal Article