Advances in Civil Engineering and Architecture

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Authors: Yong Xiang Wang, Li Xie
Abstract: The paper aims to provide a new way for energy saving reconstruction scheme optimization.In order to seek the most reasonable and scientific energy saving reconstruction scheme for the existing buildings.The writers introduce an improved value coefficient method.In the method,the triangular fuzzy number is employed to determine the weights of the function sub-indexes.The paper also proposes that the cost coefficient should adopt the annual value of the life cycle cost.And then the writers establish a corresponding analysis model and offer a detailed elaboration on its application based on a project case of existing building energy saving reconstruction.
Authors: Meng Liu, Chun Yu Huang, Qun Ying Cheng
Abstract: 14 hotels were selected in Chongqing for energy consumption profile analysis. And all of the hotel buildings are high quality hotels with 3-star or above. Due to the extremely local climate, the energy demand on heating and cooling is dominant in the total energy consumption. From the analysis, it is found that heating in winter accounts for more than half of the fuel use and cooling in summer is for around half of power consumption. Moreover, the chillers, pumps and terminals are responsible for one third of HVAC energy consumption respectively. As estimated from the samples, the energy consumption index of Chongqing hotel buildings is between 107 and 155 kWh/m2.
Authors: Xiao Ming Sun, Jian Hong Li
Abstract: Because of environment deterioration and energy shortage during urban development, the ecological condition of the human environment gets attention. Developing the ecological architecture greatly becomes necessary. The rationality of ecological architecture represents not only in technology advancement and energy saving, but also in aesthetic standard, whose importance surpasses the former, in some sense. In this paper, it is analyzed on aesthetic variation, constitutive way and visual expression of the shape design of ecological architecture to support the research of the visual expression in the shape design of ecological architecture in theory.
Authors: Fang Yang, Lin Zhu Sun, Zi Ling Xie, Ya Gang Zhou
Abstract: To determine the optimal material mixing ratio of and process parameters for aerated concrete products, we adopted various combinations of material mixing ratio and process parameters to test aerated concrete according to the characteristics of local material and process equipment in this study, and obtained the strength and density of the aerated concrete. Using artificial neural network, we built a three-layer neural network model, which was trained based on the data of test samples to obtain a neural network based model system. Sample test showed that the predicted values of the model system fit the test values well; we utilized this system to analyze the material mixing ratio of and process parameters for aerated concrete products, and obtained their optimization results. The strength and density of the aerated concrete manufactured with the optimized parameters reached the desired targets. This method has some reference value for instructing the production of aerated concrete.
Authors: Shou Wei Jian, Long Yuan, Yang Lv, Hong Bo Tan, Xiang Guo Li, Bao Guo Ma
Abstract: Iron ore tailings and waste rock are solid waste during mining in the steel industry. This paper presents the study on sintered wall materials made use of iron tailings and waste rock. The process parameters through chemical analysis and thermal analysis to determine the feasibility of using iron ore tailings and rock on sintered wall material. Plasticity index, firing shrinkage, water absorption, apparent porosity and bulk density are tested, and the proportion of these two materials are also determined. The results show that iron tailings and waste rock can be used to sinter MU15 wall materials, with the sintering temperature ranges 850-950°C, but shrinkage of the specimen (diameter and height shrinkage) of 2.5%-5.0%, and the apparent porosity 42% or more. This technology not only use both waste as raw material, furthermore, because of the higher iron content in iron ore tailings and waste rock, the products reduce the sintering temperature, decreased energy consumption. The technology uses waste as raw material, furthermore, due to the high iron content in the ore tailings and waste rock, the sintering temperature is decreased, which saves energy.

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