M. Haghshenas, M. R. Bemanian, Z. Ghiabaklou,
Volume 25, Issue 2 (12-2015)
Abstract
Traditional building technologies have much to teach us about how to design regionally appropriate structures. The Orosi is one of these useful technologies, which has been used for many centuries in order to control the harsh sunlight in Iran. This architectural element was rather important because the intensive solar radiation could easily damage valuable carpets used in most spaces in Persian buildings. The main question of this research was how much could the traditional Orosi windows reduce the harmful spectrums of sunlight? In order to investigate this effect, a combination of field study, laboratory measurements, and case study research method was applied. Nine Persian traditional Orosi windows were chosen as case studies and the windows’ geometric lattice (Gereh–Chini) and glazing color combinations were drawn and plotted. The experiment was carried out for carpeted and non–carpeted spaces. In order to measure the light transmission of the sample tinted glazing from the Orosi windows, a T80+ spectrophotometer was used. After calculating CIE and skin damage factors and visible transmittance for each piece of glass, an area weighting was used to calculate these factors for the entire Orosi. The results show a significant difference between CIE damage factors of the Orosis in carpeted and non–carpeted spaces where the carpeted spaces had the least amount of CIE damage factor.
Mohsen Mohammadi, Zahra Ghiabaklou, Hamed Moztarzadeh,
Volume 34, Issue 3 (7-2024)
Abstract
High temperatures and air pollution are significant challenges in ensuring fresh air supply in the hot-humid climate of Asalouye City. These conditions compel residents to rely heavily on mechanical cooling, which subsequently escalates energy consumption and deteriorates indoor air quality. The primary air pollutants include Particulate Matter (PM), Volatile Organic Compounds (VOCs), and microorganisms. Fiber filters and electrostatic filters are the most common methods for purifying PMs from the air, with the electrostatic method offering advantages such as high efficiency, the ability to remove a wide range of particles, low-pressure drop, and no need for frequent replacement. This study proposed a ventilation system integrating a window,
a precipitator using electrostatic technology, a cooling coil, and an exhaust fan. The system's performance was evaluated using CFD simulation in Ansys-Fluent software (2021) to assess its effectiveness in reducing PM concentrations, pre-cooling incoming air, and maintaining the standard ventilation rate. The findings revealed that at air velocities of 6 m/s and 1 m/s, the system could completely remove copper, nickel, and sulfur particles with diameters of 0.1 µ and 10 µ. Additionally, the distance between the system's air inlet (window opening) and its air outlet (where air enters the interior) significantly influences the particle reduction level. The proposed cooling coil, however, only managed to reduce the air temperature by 2°C. In the absence of wind, an exhaust fan with a pressure jump of at least 250 Pa or 500 Pa is necessary to achieve the standard airflow and ventilation rate.
