How Tmrt Affects PET Assessment in Outdoor Environments: A Comparative Study

Many studies have explored outdoor thermal comfort during the last several years, ever since it has been strongly related to human health and well-being. The physiological equivalent temperature (PET) is one of most commonly used indexes. It approved applied within different urban spaces climates. This study a comparative research that importance using mean radiant (Tmrt) in PET assessment by employing two methods. first method was calculate based on three measured variables including relative humidity, wind velocity, air temperature. RayMan software utilized perform calculations. second combining Envi-met RayMan. allowed four sets calibrated data, data (Ta), velocity (Wv), humidity (RH), (Tmrt). results PET. These methods were environments at Annaba, Algeria, characterized Mediterranean climate. showed significant differences values, especially through warmest times day. highlighted very high where 40 ≤PET<51 noon. At same time, Tmrt gave precise values (30≤PET ≤32). Based these findings, we can confirm considering calculation, which allows identify accurate range.
 Keywords: Mean Radiant Temperature (Tmrt), mediterranean climate, Physiological Equivalent (PET),