Hosein Asakareh; Saeed Movahedi
Volume 6, Issue 23 , November 1997, , Pages 6-10
Abstract
The effective temperature is the temperature of calm and saturated air that can have, in absence of radiation, the same effect that the air in question has. This standard combines the effects of temperature and humidity. The modified effective temperature, besides the two factors of temperature and humidity, ...
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The effective temperature is the temperature of calm and saturated air that can have, in absence of radiation, the same effect that the air in question has. This standard combines the effects of temperature and humidity. The modified effective temperature, besides the two factors of temperature and humidity, involves the effect of radiation and cooling quality of wind as well. Therefore, it is the most accurate standard recommended for study of air conditions in terms of human comfort.
Effective temperatures between 22o to 27o and wind flows with speeds between 0.15 to 1.5 m/s have been suggested as the area of comfort for human being in hot regions. The following issues are considered for determination of thermal comfort area in Abadan and Dezful:
Need for mechanical cooling and provision of shade, need for decreasing the speed of wind, need for mechanical heat in early hours of the day (during winter).
It should be noted that the maximum effective temperature of Abadan in absence of wind occurs during April to June as well as August and October. In Dezful, maximum effective temperature takes place with one month of delay compared to Abadan, namely from May until June and then in September and October.
Saeed Movahedi; Mohammad Mosayyebi
Volume 5, Issue 18 , August 1996, , Pages 4-18
Abstract
Chaharmahal and Bakhtiari province is located at the heart of the Zagros Highlands between north latitudes of 31 degrees,14 minutes to 32 degrees, 47 minutes, and between eastern longitudes of 49 degrees,51 minutes to 51 degrees, 34 minutes (Refer to maps 1 and 2). The altitude of the province is very ...
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Chaharmahal and Bakhtiari province is located at the heart of the Zagros Highlands between north latitudes of 31 degrees,14 minutes to 32 degrees, 47 minutes, and between eastern longitudes of 49 degrees,51 minutes to 51 degrees, 34 minutes (Refer to maps 1 and 2). The altitude of the province is very high, so that Shahrekord is 2066 m, Zaman Khan bridge 2000 m and Hamgin 2150 m above the sea level. The temperature in the region increases from north to south, but in general it is one of the coldest parts of the country. For example, the annual temperature in Shahrekord is 12.1 ° C and the average minimum temperature in five months of year in this city is below zero degrees (See Figures 1 and 2). The average annual temperature of Adl Borujin station is 10.4 degrees and the average of the minimum temperature during the five coldest months of year is below zero. The rainfall in the region is high in comarison with the rest of the country; for example, the annual rainfall is 323 mm in Shahrekord, 469.5 mm in Borujen and 530 mm in Lordegan (see Figures 3 and 4).
In this paper, while identifying the climatic factors of Chaharmahal and Bakhtiari province and their effects on the design of residential spaces, we tried to answer the following questions.
• What are the characteristics of the province’s climate and what is its condition in terms of temperature? • What is the impact of climatic conditions on residential space design? • What is the amount of cooling and heating energy required in different seasons, and under which conditions can energy requirements be brought to a minimum? • How can residential spaces, streets and alleys be arranged to receive maximum solar energy during cold season and the minimum of this energy during warm season?
Mohammad Mosayyebi; Saeed Movahedi
Volume 4, Issue 16 , February 1995, , Pages 6-11
Abstract
Nature is extremely complicated, and often this complexity is such that we feel dreadfully ignorant of them. Consequently, when we consciously or often unknowingly and accidentally cause major changes in the world, we transform the ultra-complex mechanisms in a way that we cannot predict the consequences ...
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Nature is extremely complicated, and often this complexity is such that we feel dreadfully ignorant of them. Consequently, when we consciously or often unknowingly and accidentally cause major changes in the world, we transform the ultra-complex mechanisms in a way that we cannot predict the consequences of them. That's why there are some weird things happening.
One of the most fundamental factors in the structure of the Planet is the climate, and undoubtedly nature, man and all manifestations of life are at a broad level affected by climatic conditions. Climate scientists have come to the conclusion that climate can be changed in all aspects of time. Climate change is the result of interaction of complex and less-known factors. Some of these factors act outside the Earth's atmosphere, and some of them are ground-based systems, some of which are in human control, and human actions change their process. The transformation of these factors will lead to countless environmental issues, all of which arise from the fact that space, time, diversity of matter and energy are not considered as resources, and due to the increasing trend of the variety of pollutants in nature, the instability of global ecosystem will be inevitable. In this paper, the impact of human activities is analyzed with an emphasis on the impact of carbon dioxide.
