Determination of Limit of Thermal Comfort in Arid Climate (Case Study: Yazd City)

Subject Areas : architecture

Mohammad Hassan  Sadeghi Ravesh ¹ (Academic staff of Takestan Branch; Islamic Azad University, Iran. (Corresponding Author))
Seyed Mehdi  Tabatabaei ² (B.Sc. in Architecture, Art and Architectural Faculty of Yazd, ACECR higher education institute.)

Received: 2007-09-21 Accepted : 2008-08-15 Published : 2009-08-23

Keywords:

Abstract :

      In sustainable development process, native evaluation of limit of thermal comfort with the goal of energy conservation is necessary in different climates.  Because with determination of these limits, energy loss is declined considerably and causes to decline of unsuitable energy consuming. With respect to, more than 60 percent of Iran area is located in arid and ultra arid climate and therefore recognition of limit of thermal comfort in this climate has multiplied importance.             For calculation of limit of thermal comfort, Yazd city was considered with arid and cold climate as the case study in this research. The limits of thermal comfort were reformed on the basis of the latitude of the study area. Then the limits of thermal comfort were calculated for warm and cold terms of the year according to the climatic data and field observation and on the basis of corrected diagram of Olgyay.        The obtained results show that thermal limit was assessed for summer condition 21.8 º - 27 º and for winter condition 20.4 º - 23 º and also optimum limit of relative humidity was assessed 18% -53%.        The proposed thermal and humidity limits, maintains proper internal conditions, reduces energy unsuitable consumption during of years  

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