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Showing 4 results for Windows

Hadi Kargar Sharifabad, Masood Jalilian,
Volume 16, Issue 1 (3-2016)
Abstract

In this article, indicators of annual energy intensity 13 residential complexes with different characteristics were evaluated and compared. These features include the type of facade, heating and cooling systems, windows, and separate or shared type gas meters are units available in the complex. Introducing selected complexes, specifications hull, heating and cooling systems as well as the energy used in the study and analysis of energy flows in the complex have been discussed. The data processing methodology for calculating the energy consumption rate index have been studied conglomerate. The indices are calculated energy intensity of buildings and structures with different properties in terms of energy intensity compared. Compare energy intensity indicators show that the use of new energy Mtalh like metal siding board (decorative panels) instead facade, windows UPVC windows instead of metal, instead of single-wall and double glass instead of heaters and boilers as well as the use of semi-centralized heating systems or room in the building's energy intensity has considerably decreased. Also, instead of using a separate gas meter gas meter joint, by influencing the behavior of the occupants of the building and create a financial incentive to reduce energy use saves natural gas consumption and decreasing energy intensity building.
Danial Hakimi Rad, Mehdi Maerefat, Behruz Mohammadkari, Hazhar Rasouli,
Volume 16, Issue 7 (9-2016)
Abstract

Study air infiltration into the building in several ways such as energy, air quality, thermal comfort and pollution entering in the building is very important. In this context, many studies have been conducted in different countries. In our country due to the use of steel doors and windows, do independent research on the gap size and air infiltration is necessary .In this study, by practical view and in order to localize results, based on a field study, the actual dimensions of the gaps around conventional doors and windows in Iran is measured. The results of these measurements are used to simulate gaps, then with experimental study, air infiltration rate of this gaps is calculated at different pressures. In present study, after investigating the effect of different aspects of gaps on air infiltration rate, two common equations, power law and quadratic equation, in order to fitting data were compared. Results show that power law equation can adapt better to the experimental data. Coefficients of the power law equation to estimate the air infiltration rate through the gaps was presented. By analysis of the results, due to the proximity factor of the pressure difference to the number 0.5 in most of the results, it was concluded that the Bernoulli equation can be used to predict the air infiltration rate through the gaps. This equation is better compliance with laws and physical principles. Discharge coefficient of the Bernoulli equation for gaps with different dimensions are calculated.
Danial Hakimi Rad, Behrooz Mohammadkari, Mehdi Maerefat,
Volume 16, Issue 11 (1-2017)
Abstract

Nowadays, modern windows with standard caulking used in most buildings. Study of air infiltration and caulking this windows in several ways such as energy, indoor air quality, thermal comfort and pollution entering in the building is important. In this study consists of two parts, first experimentally investigated the airtight performance of various window gaskets. For this purpose, using 8 different types of gaskets and simulate modern window gap, air infiltration rates measured at different pressure differences. The results show that the airtight performance of various gaskets are different. Also fitted the experimental results by power low equation, and relations and coefficients for calculate air infiltration rate of modern windows (sealed windows), respectively. In the second section due to the very low air infiltration rate of the experimental results, indoor air quality assessed by numerical modeling methods. In the sample model, air infiltration of modern windows as ventilation and human breathing as a source of CO2 simulated. Indoor air quality is weighed by the CO2 concentration in the interior space. The results show that the air infiltration of window gaps to ensure air quality during the 8 hours is not enough. Then, assuming uniform distribution of CO2 in the sample space, and solve the transfer species equation for the problem situation, analytical equation for evaluating indoor air quality were achieved. Analytical results matches on numerical simulation results exactly. The results of this study can be very useful for HVAC engineers.

Volume 21, Issue 3 (12-2017)
Abstract

As the goals and interests of employees wont met and satisfied through formal or informal organization structures, and they concludes that their role in organization is not recognized, they attempt to create brawl, in order to attract senior managers attentetion. The purpose of this research is to achieve a theory in identifying cause of organizational employees brawl, strategies for its management and also better understanding of the circumstances in organization and behavior change. This is a qualitative research based on data theory strategy. Semi- structural interview were used to gather data and Strauss-Corbin method used to analyze the data. Theoretical sampling has been done in managers group, which 16 interview were held with managers, faculty members and organization experts, who were experienced and had adequate knowledge about cause of such behaviors. Result obtained from interviews has led to designing organizational brawl theory in management. The model has been verified using Structural equation modeling and it was found that ten factors involved in creation of brawl in the organization.

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