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Yerevan, Armenia

National University of Architecture and Construction of Armenia is a state university in Yerevan, Armenia. Wikipedia.

Fouda A.,Mansoura University | Melikyan Z.,Yerevan State University of Architecture and Construction
Energy | Year: 2010

Cooling load calculations are essential in sizing air conditioning system equipment. In designing energy, efficient and renewable energy sourced cooling systems for buildings, it is important to have the exact values of cooling loads and seasonal cooling demands of buildings. In this paper new assessment method for more precise determining of cooling loads and seasonal cooling demands of residential buildings are developed, which are necessary for right solutions of cooling efficiency problems. Comparing to the method of ASHRAE, example and other methods it provides more correct results. Application of suggested method provides better accuracy in assessment of cooling loads especially for seasonal aspects, as they take into account the impact of more factors. © 2010 Elsevier Ltd. Source

Ter-Petrosyan G.V.,Yerevan State University of Architecture and Construction
Advanced Materials Research | Year: 2014

The calculation of the structure's hardness is of special importance in calculation of possibility of existing splits' distribution in account of ensuring the reliability of the problem's solution. It is known that the structure's crumbly deterioration is dangerous not only for its unexpectedness but also because it takes place in the conditions of operating voltages of such magnitude, which are obviously smaller than the calculating ones. This means that the actual supply of structure's hardness, which is defined by the usual calculating methods of hardness, without taking into account the existence of splits, will be significantly smaller than the provided. If the existence of splits are not taken into account, then the local overvoltage occurs around them and ultimately unprecedented crumbly deterioration of structure takes place. © (2014) Trans Tech Publications, Switzerland. Source

Shamyan V.L.,Yerevan State University of Architecture and Construction
Advanced Materials Research | Year: 2014

The studies on operating effectiveness of sand traps in partially acting facilities of the Yerevan Aeration Plant have shown that along the satisfactory clarification of silts (sand) of mineral origin at the facility bed materials of organic origin are also trapped causing sand traps failure their main function which is clearly separation of the two types of waste waters. In addition serious problems and difficulties arise also in the sand removal. © (2014) Trans Tech Publications, Switzerland. Source

Fouda A.,Mansoura University | Melikyan Z.,Yerevan State University of Architecture and Construction
Applied Thermal Engineering | Year: 2011

In this paper heat and mass transfer, process in direct evaporative cooler is discussed. A simplified mathematical model is developed to describe the heat and mass transfer between air and water in a direct evaporative cooler. The model consists of the governing equations with their boundary conditions and some associated algebraic equations. The related latent heat of water evaporation is taken as a heat source in the energy equation, and the mass of evaporated water is treated as a mass source in the mass equation. The study presents a comparison of the computed results with that of experimental results for the same evaporative cooler. A good agreement between the calculated and experimental results is achieved. The influences of the inlet frontal air velocity, pad thickness, inlet air dry-bulb temperature on the cooling efficiency of the evaporative cooler are calculated and analyzed. The predicted results show validity of simple mathematical model to design the direct evaporative cooler, and that the direct evaporative cooler with high performance pad material may be well applied for air conditioning systems. © 2010 Elsevier Ltd. All rights reserved. Source

Khachikyan L.,Yerevan State University of Architecture and Construction
Advanced Materials Research | Year: 2014

The artistic expressions, constructive techniques, national cultural values of monument buildings, their succession and maintenance problems are especially perceptible and appreciable when observed in their historical environment.Monuments can be observed in two main groups according to their location: natural and urban landscape groups. Naturally, landscape changes over years undergoing construction development and different natural or anthropogenic influences. Of course much more structural problems are notable in urban contexts, since they are much more susceptible to dynamic changes in urban environment.The above mentioned problems are various in Republic of Armenia (RA): as a result of spontaneous development and incorrect land use monuments often lose their vitally important natural environment, perspective and landscape silhouette. This article mainly deals with the structural and panoramic problems of landscape, emerged in the environments of monument buildings in RA. They have been studied by comparative analysis based on the examples of existing monuments both in urban structure and natural landscape.Based on photographical comparison, analysis of literature, software and metric gauging methods it will be possible to reveal the planning, climatic, anthropogenic negative, neutral and positive factors affecting the modification of protection zones of monuments in RA.As a result it becomes possible in particular situations to neutralize much of the existing negative factors. The study will give an opportunity to solve some problems of already modified environments or landscape continuous degradation by developing rehabilitation projects, providing new interesting solutions related to the aesthetic and technological aspects, as well as the materials that are being used. © (2014) Trans Tech Publications, Switzerland. Source

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