دانلود رایگان مقاله لاتین عملکرد هیگروترمال از سایت الزویر
عنوان فارسی مقاله:
عملکرد هیگروترمال یک ساختمان کاه بیل: در محل و تحقیقات آزمایشگاهی
عنوان انگلیسی مقاله:
Hygrothermal performance of a straw bale building: In situ and laboratory investigations
سال انتشار : 2016
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مقدمه انگلیسی مقاله:
1. Introduction
The energy costs of construction and the impacts of building materials on the environment are at the core of social concerns, both for the manufacture of building materials, and for the construction and use of these buildings. This has led to renewed interest in traditional structures, which have historically been rejected by investors since the Second World War. Moreover, these kinds of structures promote renewable materials like straw. In France, the first straw-based construction was built in 1921 [1] and, over recent years, some studies [2–5] have been carried out to overcome the drawbacks linked to the use of straw in the construction field. Straw was used in building throughout the 20th century and, in the last ten years, the advantages of this material have been recognized, such as great thermal and acoustic insulation, an energy efficient manufacturing process, and the decrease in carbon dioxide in the atmosphere due to the photosynthesis of straw [6,7]. This natural material grows by photosynthesis using solar energy, during a period from six months to one year. It is produced in large quantities and in many regions of the world. Straw is cheap and plentiful. Straw bale-based buildings represent low energy consumption, durability and attractiveness, and it can be resistant to various attacks thanks to a good choice of the building system [8]. The measurements of temperature and relative humidity in a straw bale house located in Bavaria, Germany [8] showed that the straw walls had excellent properties to provide excellent living conditions. Straw is an organic material, intrinsically flammable, which can contain some proteins and carbohydrates leading to a decrease in sustainability [9]. Lastly, straw presents weak mechanical properties in compression, in bending and in stiffness [10–12]. The sustainability of straw-based buildings depends strongly on temperature, moisture, and a combination of both [13]. There are concerns regarding the long term effects of moisture on the durability of these materials in a temperate maritime climate such as the United Kingdom [7,9]. According to Steen et al. [14], a moisture content close to 20% (or a relative humidity of 70% RH) corresponds to the level at which biological activity begins. Moreover, straw bale walls can deteriorate due to various factors like building design or construction details. Temperature and moisture are essential parameters resulting from environmental factors linked to the site of implantation (orientation of walls, regional climate, etc.). Thus, this study focuses on laboratory and in situ investigations of these essential parameters, resulting from the moderate climate of the Picardie region of France. The first part of this article focuses on the evaluation of the steadystate thermal conductivity of straw bales, depending on the orientations of the straw fibers. Then, a load-bearing wall was manufactured in the laboratory with the same construction details as the full-size building. Few studies have involved the characterization of straw bale walls at the laboratory scale (Hot Box apparatus) [15–18] and this work proposes investigations on a full-scale straw bale wall, respecting the construction details. In the second part, sensors installed during the construction phase enable the building to be monitored. Temperature and moisture were recorded during one year at various places in the structure. Finally, a simulation based on laboratory investigations was used to assess the heating power requirements of the real house.
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کلمات کلیدی:
Download Paper isi-dl.com/download/143150 Oct 6, 2016 - Straw bale house. Straw bale wall. U-value. Hygrothermal performance. Thermal inertia. Moisture content. A B S T R A C T. This paper focuses ... Hygrothermal performance of a straw bale building: In situ and ... isi-dl.com/item/143150 Hygrothermal performance of a straw bale building: In situ and laboratory investigations. sciencedirect.com. Source Link ... [PDF]On the hygrothermal performance of straw bale wall elements in Belgium nimbusvault.net/publications/koala/SEBRA/papers/seb14s-007.pdf by J Langmans - 2014 - Related articles 2Sustainable building research group, KU Leuven-KaHo,Ghent, Belgium. Abstract. The present article investigates the hygrothermal performance of straw bale. Hygrothermal performance of a straw bale building: In ... - FreePAPER freepaper.me/downloads/abstract/10.1016/j.jobe.2016.10.002 Translate this page AbstractThis paper focuses on the assessment of the hygrothermal performance of a straw bale house in the Picardie, a region of France. The house was built ... Nonconventional and Vernacular Construction Materials: ... https://books.google.com/books?isbn=0081000553 Kent A Harries, Bhavna Sharma - 2016 - Technology & Engineering 6.3.3 Hygrothermal properties and risk of decay Straw bale walls are constructed with ... must be given to the hygrothermal performance of a straw bale building ...
