Abstract
This paper presents a thorough study on the Mean Radiant Temperature, which is considered as the most important factor for estimating outdoor thermal comfort, especially in sunny climates.
Tmrt Summarize all thermal radiations, including short and long waves radiations coming up to the human body that's why Tmrt is so complicated in time and space especially in open urban spaces. In this paper we present various methods to assess and estimate Tmrt, mathematical and digital models are discussed and in conclusion we present a new digital platform SPUCAL_mrt, which evaluate and simulate the Tmrt in open urban space in arid lands to reach the main objective “to a sustainable and comfortable built environment”.