scholarly journals Thermal interference of engineering construction with permafrost ground as bottom

2017 ◽  
Vol 106 ◽  
pp. 02018 ◽  
Author(s):  
Ulyana Shastunova ◽  
Pavel Michailov
Keyword(s):  
Engineering Construction ◽  
Permafrost Ground ◽  
Thermal Interference

DYNAMIC AND THERMAL INTERFERENCE EFFECTS ON TWO NEIGHBOURING BUILDING MODELS

2019 ◽  
Vol 21 (5) ◽  
pp. 138-150
Author(s):  
S. V. Korobkov ◽  
A. I. Gnyrya ◽  
V. I. Terekhov
Keyword(s):  
Heat Exchange ◽  
Mutual Effect ◽  
Convective Heat Exchange ◽  
Physical Models ◽  
Interference Effects ◽  
Total Contribution ◽  
Heat Flows ◽  
Building Models ◽  
Number Of Factors ◽  
Thermal Interference

The paper considers the dynamic and thermal interference effects on two neighbouring building models in the form of square prisms arranged at a short distance from each other. It is shown how relative positions of the models affect the specific phenomena caused by the airflow interactions.The aim of this paper is to experimentally study the dynamic and thermal interference of a tandem of two building models in the form of square prisms depending on their relative position.The phenomenon of wind loads on buildings and structures has always attracted great interest among engineers and researchers. With the accumulation of knowledge and technical capabilities, the potential for likely ways to study wind flows and their impact on different objects increased. In recent years, the world science has accumulated an extensive knowledge base on wind impacts on objects of various shapes, such as prisms, pyramids, cylinders, etc. Studies are carried out for their mutual impact of several objects on changes in both the wind load and heat exchange. Their mutual effect on the air motion and turbulence is considered.There are two main areas in the field of the wind impact. The first impact is the force load on building, the second is the wind as a source of convective heat exchange. The object of this study is the interference parameters allowing to assess the influence on the field of pressure and heat recoil of disturbances evoked in front of the barriers.At the first stage, physical models help to study the pressure field on different facets and ratios of the local and medium heat exchange under the forced convection conditions. The next step is to jointly consider the wind (dynamic) load and heat flows, attempting to detect the total contribution to changes depending on the reciprocal model arrangement. All experiments are performed in the aerodynamic tube, at the TSUAB department. It is shown that the dynamic and thermal interference ratios vary greatly in two building models. At the same time, the thermal interference is very conservative compared to the dynamic. Using the interference parameters, it is easy to analyze the extreme pressure and the heat flow on the model surface depending on a large number of factors, including their arrangement.

Using Analytic Hierarchy Process to Optimize PESTEL Scenario Analysis Tool in Huge Construction Projects

2017 ◽  
Vol 865 ◽  
pp. 707-712 ◽  
Author(s):  
José Geraldo Lamas Leite ◽  
Luiz Carlos Brasil de Brito Mello ◽  
Orlando Celso Longo ◽  
Eduardo Picanço Cruz
Keyword(s):  
Analytic Hierarchy Process ◽  
Scenario Analysis ◽  
Exploratory Study ◽  
Construction Projects ◽  
Pareto Distribution ◽  
Civil Engineering ◽  
Analysis Tool ◽  
Analytic Hierarchy ◽  
Engineering Construction ◽  
Hierarchy Process

This paper uses the Analytic Hierarchy Process to optimize the PESTEL analysis. The scenario: pre-construction and assembly factors of huge civil engineering construction projects. Several managers use too many criteria to evaluate large projects. It suggests that there may be few important criteria that summarize the manager's preference. To demonstrate the feasibility of the proposed hypothesis, the authors prepared a qualitative and exploratory study. Conclusions are based on the judgment of an expert interviewed. As expected, the hypothesis was considered plausible. Two main criteria corresponded to 71% of the expert's preference. The result resembles a Pareto distribution.

Assessment on Biogas Utilizations in Rural Areas in Urumqi, Xinjiang

2012 ◽  
Vol 512-515 ◽  
pp. 343-346
Author(s):  
Xiao Li Ma ◽  
I Shin Chang ◽  
Jing Wu
Keyword(s):  
Rural Areas ◽  
Alternative Energy ◽  
Practical Experience ◽  
Biomass Energy ◽  
Development Mode ◽  
Ecological Benefits ◽  
Engineering Construction ◽  
Comprehensive Utilization ◽  
Existing Problems ◽  
Reliable Source

As the effective and efficient means of resources utilization, biomass energy has become a very valuable and reliable source of alternative energy in China, especially for remote areas and countryside. First, in order to facilitate the development of biogas applications and promote the economic, social and ecological benefits from comprehensive utilization of biogas in rural areas in Urumqi (Capital of Xinjiang Uygur Autonomous Region, XUAR), the biogas potential was estimated, the biogas engineering construction and biogas comprehensive utilization were evaluated, and the existing problems of biogas development were analyzed, in this study. Second, countermeasures and recommendations were proposed in trying to resolved existing problems, based on international practical experience. And, according to local climatic situation and regional characteristics in Urumqi, ecological agriculture was proposed in this study as the development mode for the rural areas in Urumqi, based on the development of biogas technologies and international practical experience.

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