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The benefits of vegetated roofs in reducing the excess heat in three urban areas with different climate conditions
Published in Mohamad Al Ali, Peter Platko, Advances and Trends in Engineering Sciences and Technologies III, 2019
ENVI-met is selected due to the capabilities of this software in modeling greenery and urban fabrics. ENVI-met is a three-dimensional microclimate numerical model that can simulate the surface-plant-air interactions, solar path, buildings and vegetation within urban environment and is based on the fundamental laws of fluid dynamics and thermodynamics. It shows a good resolution that satisfactorily models small-scale interactions between buildings, surfaces, and plants.
Modelling of Microclimates
Published in Bruno Peuportier, Fabien Leurent, Jean Roger-Estrade, Eco-Design of Buildings and Infrastructure, 2020
ENVI-met is a 3D digital simulation platform that aims to model the complete real cycle of micro-climatological factors in high resolution (see Figure 15.1). ENVI-met is used around the world to analyse different aspects of urban climate, architecture and landscape.
Evaluating urban outdoor thermal comfort: a validation of ENVI-met simulation through field measurement
Published in Journal of Building Performance Simulation, 2022
Reem Abd Elraouf, Ashraf ELMokadem, Naglaa Megahed, Osama Abo Eleinen, Sara Eltarabily
ENVI-met was chosen for this study because previous investigations have revealed that it is the most suitable software system for analyzing thermal comfort in the street canyon (Detommaso, Costanzo, and Nocera 2021; Elgheznawy and Eltarabily 2021; Elwy et al. 2018b). ENVI-met is a three-dimensional non-hydrostatic model that simulates surface-plant-air interactions, urban environments, and the effects of green architecture visions. It is designed for microscale analysis (normal horizontal resolution of 0.5–10 m; typical time frame of 24–48 h; time step of 1–5 s), allowing researchers to investigate small-scale interactions between individual buildings, surfaces, and plants (Chatzinikolaou, Chalkias, and Dimopoulou 2018; Sule Zango et al. 2018; Xiaoshan Yang, Lihua Zhao, Michael Bruse 2013; Fairuz et al. 2012; Maleki et al. 2014). ENVI-met also offers precise outputs, including the PMV, PET, UTCI and SET indexes space distribution, based on a three-dimensional microclimate model (Fabbri et al. 2017). PET is an accurate index, and the results give a clear indication of the comfort temperature because it is still measured in degrees, hence PET is employed in outdoor thermal comfort calculations (Setaih, Hamza, and Townshend 2013; Huang et al. 2018; Elnabawi and Hamza 2020; Galal, Sailor, and Mahmoud 2020).
Effect of street design on pedestrian thermal comfort
Published in Architectural Science Review, 2019
Elmira Jamei, Priyadarsini Rajagopalan
This study used ENVI-met 3.1 Beta5 to model the future structural plans. ENVI-met was selected as a preferred tool in this study because it is one of the very few tools that can simultaneously calculate the meteorological conditions, surface energy fluxes, and soil and vegetative processes within the urban environment across a range of urban configurations (Ali-Toudert and Mayer 2006; Gulyás, Unger, and Matzarakis 2006; Bruse 2011). ENVI-met simulates the interaction among surfaces, plants, and air in an urban environment with a typical resolution of 0.5–10 m in space and 10 s in time. ENVI-met is known to be one of the most sophisticated models among all the urban microclimate models, which include all the energy and radiative processes that occur in an urban environment (Bruse 2011). The main reasons for selecting ENVI-met as the preferred modelling system are explained as below: This model simulates the microclimate dynamics within a daily cycle. The model predicts all exchange processes, such as wind flows, turbulence, radiation fluxes, temperature, and humidity.Different types of vegetation can be created in the model. ENVI-met does not consider vegetation as a porous obstacle to the wind and solar radiation but instead includes the physiological process of evapotranspiration and photosynthesis. The soil in ENVI-met includes a volume that is composed of several layers.High spatial (up to 0.5 m horizontally) and high temporal resolution (up to 10 s) provide a detailed illustration of microclimatic alterations, particularly the changes in the variables that contribute to comfort and urban geometry.A limited number of inputs are required to run the model with a large number of outputs.ENVI-met can calculate Tmrt, which is the most important parameter in thermal comfort calculations.