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ETFE (Ethylene Tetra Fluoro Ethylene) is a lightweight polymer that is gradually gaining favor as an aesthetically pleasing building material, most commonly used by layering the foils to form ‘pillows’. Widespread use of this material, however, is hindered by its poor thermal insulation properties. The heat transmission properties of ETFE can be altered by adding a thin coating of low-emissivity material...
The research presented in this paper aims to identify the impact of the Moroccan Thermal Regulation for Construction (RTCM) on thermal performance of a typical house located in the climate zone 5 (Marrakech). To broaden this study, we did the same inspection as if the house is located in the climate zone 1 (Casablanca). The study is based mainly on two aspects: experimental validation of the computer...
In this work, thermal resistance and transmittance of different multilayer walls built from hollow clay bricks was computed using electrical analogy. For this aim a special program was written in Mathemtica language for various types of bricks and wall conventionally used in Morocco. The influence on the thermal resistance of the insulation material filling cavities was also analyzed. Furthermore...
Cold warehouses are relatively high energy consuming systems, and their construction are growing. In the design of these buildings, the choice of the insulation thickness is an important factor that affects the owning and operating costs. In practice, it is common to use heat flux density values or R-values given in the technical literatures. These values seem to neglect the possible effects of parameters...
Specific measures to implement building energy-saving on wall are proposed by comparing the common wall energy-saving technologies and their characteristics at present, analyzing and calculating building energy-saving designs. This further pushes forward the effective improvement of application of building energy-saving measures in wall.
A field study was carried out to evaluate the benefits of insulated roof and insulated ceiling for naturally ventilated buildings in Malaysia. Two identical test cells with dimensions of 4m × 4m × 3m were used as building samples. Both test cells have identical design and were constructed with conventional building envelope. The non-insulated control unit is named as Test Cell A (TCA) while the insulated...
The aim of this study is to investigate the benefits of pitch insulation and ceiling insulation for air-conditioned buildings in the tropical climate of Malaysia. These are performed via computer simulations using a whole-building thermal energy software Integrated Environmental Solution (IES) with Apache Sim 6.0.2. The benefits are appraised by the thermal impact and the cooling load in three cooling...
Combined with the climatic characteristics of hot-summer and cold-winter area, describe the current requirements and energy saving in buildings of the rural residential in the hot-summer and cold-winter area of China. In the view of the appropriate energy-saving and insulation technology applied on walls, windows, roof and other parts of the building, and introduce the application of some relevant...
In order to accurately know the temperature field around a fixed anchorage and the heat loss of buried pipe we used the numerical simulation technology to simulate the temperature field in fixed anchorage of buried heating pipes, then, we got the intuitive temperature distribution figure and the size of heat loss. The simulation results indicate the necessity of effective insulation measures for fixed...
The solution of accumulating and keeping the heat in the walls is through insulating from the outside, a common method used in Europe although it hadn't been confirmed on the physical basis, in regards with the conditions of continental climate, may it be in winter or in summer. In effect, during summer season part of the heat gets inside despite the insulations in the walls and over the night the...
Silica-based Aerogels have a number of unique properties that make them suitable for a range of applications. These include superior thermal, acoustic, and electrical insulation capabilities, all associated with the highly-porous nature of this class of materials. Crosslinked (X) silica aerogels have improved mechanical and surface properties making them suitable for biomedical device applications,...
Building energy consumption is tremendous in China. The energy consumption of building envelope walls is 4- 5 times higher compared with that of developed countries. The envelope walls built by solid clay brick and other masonry materials have a poor thermal insulation performance, and can not meet the requirements of building energy efficiency. This paper investigates the thermal performance in winter...
This paper outlines the solutions for the energy efficient futuristic buildings. The implementation of latest technology in architecture and constructions will lead to better home with green standards. Buildings, accounting for 30-40 percent of global energy use, are known to be energy guzzlers. In India, buildings account for 30 percent of total energy consumption. The idea of green buildings promotes...
The outer surface of external wall with lightweight thermal insulating layer is easily destructed when a building is in service. In this paper, the basic destructive forms are sorted out, such as surface cracking, hollowing, shedding. And the correlating factors which cause different fractures have also been discussed. By the survey and analyses, the lack of mechanical design, improper application...
The situations of low story dwelling in northeast rural areas of China was introduced, aggregate comparing analysis was carried out on thermal insulating performance of dwellings with different structure, building material and thermal insulating equipment. According to construction experience of rural thermal insulating and ecotypical dwellings, a new rural dwelling was provided here. The new light-weight...
Based on climate of Chongqing, using DeST-h software, this article simulated air conditioning load in winter and summer and indoor natural temperature in transitional seasons of a Chongqing model building with different external walls and windows, obtained that when the thickness of insulation layer is 30 mm or the self-thermal insulation is ceramic concrete wall or ash foam concrete wall, the effect...
Polyimide (PI) is a widely used wiring insulation material for aircraft. Given the harsh environment of its employment, wiring insulation material for aircraft suffers from various degradation processes which may cause failure of electrical insulation. In this paper, the dielectric response of PI to thermal degradation and to saline exposure is investigated. To investigate the effect of thermal exposure,...
Space heating accounts for the greatest energy consumption in cold regions of China. Proper application of thermal insulation is one of the most effective energy conservation measures for residential buildings. Therefore, determining and selecting the optimum thickness of insulation is important not only for the environment but also for the energy costs. In this paper, a mathematical model demonstrating...
External thermal insulation system (ETIS) is an important part of building energy efficiency. Polyurethane foam as a superior external insulation material was analyzed in this paper. The variation law of bond strength of the ETIS with polyurethane foam was studied by atmospheric exposure tests which consist of two stages including high temperature-spraying water cycle and heating-refrigeration cycle...
Wall insulation is one of the commonly used energy-saving measures. But many factors, such as climate, building type and indoor heat gain, have great influence on the effectiveness of building insulation. In this paper, the influence of thickness of building insulation layer on the building HVAC energy consumption has been analyzed for three different indoor heat gain, 20, 50, 80 W/m2, for an office...
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