Thermal Comfort

As s tudents spend one-third of their time at school, their health, comfort, and productivity are mos tly influenced by thermal condition and indoor air quality of classrooms. Regarding that manual window-opening is a common way for providing fresh air in classes and s tudents aren't allowed to change their uniform, position or control the windows during the lesson hours, providing thermal comfort in winters may cause a lack of fresh air and therefore, dissatisfaction. This article is trying to evaluate the indoor air quality, and thermal condition of the classrooms, in two typical classrooms for 15-16-year-old girls in Arak, Iran. The overall s tudy objective is to compare indoor microclimate measured parameters, with (1) s tudents' subjective judgment, collected through a ques tionnaire, and (2) s tandards and to inves tigate the effects of microclimate on the indoor environmental condition of classrooms. According to the results, the thermal sensation of the students depends on their clothing rate and their understanding of the thermal state. In contrast, their thermal satisfaction is affected by the amount of fresh air provided. In winter, because of closed windows, students are mostly dissatisfied with the air quality and, therefore, thermal comfort, while in spring that the indoor environmental conditions meet the standards; the students feel satisfied with the conditions. The results of this research show that the indoor environment of the classrooms is mainly influenced by internal loads; consequently, its thermal condition is not a defining parameter.

The vernacular architecture of cities with old civilizations like Hamadan, located in a cold and mountainous area, s tems from centuries of optimizing material use, cons truction techniques, climate considerations, and the leas t use of fossil fuels to provide residents comfort. This region represents a specific type of dwelling that is a spectacular example of its climate conditions and compatible with its surrounding environment. This s tudy aims to inves tigate the geometric conformation of Hamedan houses and elicit the proper sugges tions to provide comfort conditions. To reach these goals, 15 houses located in the old dis tricts of Hamadan belonging to three different his torical eras were selected. Then, according to Mahoney's Table, Evan's index, Pen warden graph, and climate consultant software thermal comfort factors were assessed and calculated to compare elicited design s trategies with typology. These attributes to architectural s trategies for this region like southeas tern orientation, medium-sized windows, thick outdoor and indoor walls, thick insulation with sufficient temporary heating equipment, the high heat capacity of materials, compact urban texture and planning, protection agains t intensive wind aimed to provide comfort conditions. Then these methods were compared whit three eras' houses to illus trate how much compatibility was there practically, which eventually reduced in each of them.

Despite the similar performance of Bazaar1 in different cities of Iran, there are some the skeletal differences between markets in different climates. The Bazaar roof protects customers against natural events in any climate. The ceiling height and the sitting down of the Bazaar`s floor are determined based on the need for air circulation and movement in various climates. Hence, combination of all the factors would shape the market. Natural ventilation and cooling air are one of the major factors determining the market shape in hot and dry areas. This study aims to analyze the function of natural ventilation concerning direct and indirect effective elements and their impacts on market shape in hot and dry city-Shiraz. For this purpose, Vakil Bazaar is chosen. In this research, a combination of descriptive and case methods are applied analytically, a field which determines the wind and air function based on the dominant wind and other elements affecting the natural ventilation of Shiraz` Vakil Bazaar that in the end achieve factors to providing favorable comfort in this place.

Tourism is one of the largest economic sectors globally. It is a climate sensitive sector, with climate being one of the most important attributes for a destination. In order to know that a region's climate what extent is suitable to the given tourism activities, the tourism climate potential must be determined. This study aims to illustrate observed the tourism climate potential of Lake Urmia Basin during 1988-2012, by using physiologically equivalent temperature (PET), the predicted mean vote (PMV) and standard effective temperature (SET). The RayMan model was used to calculate the indices PET, PMV and SET. The analysis is based on the monthly measured datasets of 8 synoptic stations. Results demonstrate that according to PET and PMV, July and August are the best months for tourists in terms of thermal comfort in Lake Urmia Basin . Also, June and September have Slight cold stress and provide acceptable conditions for tourists. In SET, the thermal perceptions in no month are comfortable . But July and August have Slight cold stress and provide acceptable conditions for tourists.

Purpose : The study aims to study the effect of architectural design parameters on IEQ in accomplishing school smartification. Method : The research was conducted in school buildings located in Tabriz, Iran. The indicators chosen to represent IEQ are the adaptive PMV model used for thermal comfort, imageless daylight glare probability used for visual comfort, and CO2 concentration used for IAQ assessment. The simulation technique was used to collect data for a generative parametric school model. The method of data analysis includes a multivariate linear regression algorithm, t-test statistic, and one-way analysis of variance. The studied variables are dimensions of classrooms with the fixed area, Percentage of window area on a wall, window height, Shading, and protrusions in plan design. The stepwise method for multivariate linear regression in SPSS was used to assess the vital IEQ indicator in terms of thermal and visual comfort and CO2 concentration. Findings : The study found that among studied indicators, the south facade window ratio significantly correlates with IEQ. The other CRI parameters are the north window ratio and north window height. the findings revealed that to increase the IEQ in schools, facade design is more critical than the plan. The higher the window surface on the south, north, west, and east faces, the greater the thermal comfort and glare probability is. Conclusion : However, increasing the height of the windows can reduce glare and also increase thermal comfort. Thermal comfort improves as the length of the southern classrooms rises. On the bright side, it has no noticeable glare effect.