The Determine of the Mashad Bioclimatic Condition Base on Hourly Data

Extended 1-IntroductionHumans have been aware that weather and climate affect health and well being. Hippocrates, 2.500 years ago, wrote about regional differences of climate and their relationship to states of the health (matzarakis, 2007). In the several decades past, heat balance models of the human body have become more and more accepted in the assessment of thermal comfort. The basis for these models is the human energy balance equation. One of the first and still very popular heat balance models is the comfort equation defined by Fanger (1972).Bioclimatology data applied to the planning for architect, health and medical, exercise and tourism and vacations Climate-comforting conditions usually are expressed by indexes which a series of meteorological, human and environmental factors have been played a role in, and the possibility of comparison among different places is provided by several thermal indices such as Predicted Mean Vote (PMV), Physiologically Equivalent Temperature (PET) and Standard Effective Temperature (SET*) may be calculated for the assessment of human bioclimate in a physiologically relevant manner as shown in several applications (Matzarakis et al., 1999; Blazejczyk, Matzarakis, 2007;etc). All indices have the known grades of thermal perception for human beings and physiological stress (H ppe, 1999). PET is defined as a certain air temperature related to fixed standard indoor conditions at which the heat balance of the human body is maintained with core and skin temperature equal to those under the conditions being assessed..In this research, PET index has used for hourly bioclimatology assessment (06, 12 and 16 UTC) in the Mashhad city. This city is the second population city and religious capital in Iran that located to the north east in Iran. 2- MethodologyIn this research, great and population Mashad city have been selected for investigations comfortable climatic condition. We have used from The PET index in scale hourly time (06, 12 and 16 UTC) from 20 years period (1988-2007).The pet index derived the Munich energy balance model for individuals” (MEMI) (H ppe 1993) is such a thermo-physiological heat balance model. It is the basis for the calculation of the physiologically equivalent temperature (PET).In detail the MEMI model is based on the energy balance equation (9.1) for the human body: M +W + R +C + E D + E Re + E Sw + S = 0The individual heat flows in Eq. 9.1, are controlled by the following meteorological parameters (Verein Deutscher Ingenieure 1998; H ppe 1999):– Air temperature: C, Ere – Air humidity: ED, ERe, ESw –