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intro:modelconcept [2021/07/28 01:58] – [Module Overview] enviadminintro:modelconcept [2023/02/26 18:25] (current) enviadmin
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   * Transpiration, Evaporation and sensible heat flux from the vegetation into the air including full simulation of all plant physical parameters (e.g. photosynthesis rate)    * Transpiration, Evaporation and sensible heat flux from the vegetation into the air including full simulation of all plant physical parameters (e.g. photosynthesis rate) 
   * Dynamic surface temperature and wall temperature calculation for each facade and roof element supporting up to 3 layers of materials and 7 calculation points in the wall/ roof.    * Dynamic surface temperature and wall temperature calculation for each facade and roof element supporting up to 3 layers of materials and 7 calculation points in the wall/ roof. 
 +  * Support of wall/ roof greening systems including substrate layer 
   * Water- and heat exchange inside the soil system including plant water uptake   * Water- and heat exchange inside the soil system including plant water uptake
   * 3D representation of vegetation including dynamic water balance modelling of the individual species    * 3D representation of vegetation including dynamic water balance modelling of the individual species 
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- **Wind field**  ENVI-met includes a full 3D Computational Fluid Dynamics [[wp>Computational_fluid_dynamics|(CFD)]] modell. It solves the [[wp>Reynolds-averaged_Navier–Stokes_equations|Reynolds-averaged non-hydrostatic Navier-Stokes equations]] for each grid in space and for each time step. The effects of vegetation are included as drag forces in the wind field. For detailed building physics simulation, the wind flow close to each facade and roof segment is calculated. With the new Single Wall feature, wind patterns inside complex or semi-open structures can be simulated as well. + **Wind field**  ENVI-met includes a full 3D Computational Fluid Dynamics [[wp>Computational_fluid_dynamics|(CFD)]] model. It solves the [[wp>Reynolds-averaged_Navier–Stokes_equations|Reynolds-averaged non-hydrostatic Navier-Stokes equations]] for each grid in space and for each time step. The effects of vegetation are included as drag forces in the wind field. For detailed building physics simulation, the wind flow close to each facade and roof segment is calculated. With the new Single Wall feature, wind patterns inside complex or semi-open structures can be simulated as well. 
  
 The wind flow is updated at given time intervals. ENVI-met also supports a real-time flow calculation which means that the flow field is treated as a normal prognostic variable and calculated each step. Due to the very small time steps needed here, this way of calculation need very powerful computers.  The wind flow is updated at given time intervals. ENVI-met also supports a real-time flow calculation which means that the flow field is treated as a normal prognostic variable and calculated each step. Due to the very small time steps needed here, this way of calculation need very powerful computers. 
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 =====Soil model===== =====Soil model=====
  
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 ** Vegetation water supply ** ** Vegetation water supply **
-Plants are living organisms and will only contribute in positive way to the local microclimate, if enough water is available in the soil within the root zone. Together with the simulation of the soil water content and the new sophisticated 3D root model, the dynamic water supply of the plant and the resulting water extraction from the soil can be calculated. +Plants are living organisms and will only contribute in positive way to the local microclimate, if enough water is available in the soil within the root zone. Together with the simulation of the soil water content and the 3D root model, the dynamic water supply of the plant and the resulting water extraction from the soil can be calculated. 
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 =====Vegetation Model===== =====Vegetation Model=====
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 ** Foliage temperature** ** Foliage temperature**
 The temperature of the leafs is calculated by solving the energy balance of the leaf surface with respect to the actual meteorological and plant physiological conditions for each grid box of the plant canopy. The health status of the plant and the water supply by the soil regulate, beside other factors, the plants transpiration rate and thereby the leaf temperature.  ENVI-met uses a sophisticated model to simulate the stomata behaviour of the vegetation in response to microclimate, CO2 availability and water stress level. The temperature of the leafs is calculated by solving the energy balance of the leaf surface with respect to the actual meteorological and plant physiological conditions for each grid box of the plant canopy. The health status of the plant and the water supply by the soil regulate, beside other factors, the plants transpiration rate and thereby the leaf temperature.  ENVI-met uses a sophisticated model to simulate the stomata behaviour of the vegetation in response to microclimate, CO2 availability and water stress level.
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 ** Exchange processes with the environment** ** Exchange processes with the environment**
 Vegetation interacts in various ways with the environment: Heat and vapour are exchanged between the plants leafs and the atmosphere. Transpired water will be -if possible- extracted out of the soils hydraulic model using the plant root distribution.  Vegetation interacts in various ways with the environment: Heat and vapour are exchanged between the plants leafs and the atmosphere. Transpired water will be -if possible- extracted out of the soils hydraulic model using the plant root distribution. 
 A complex raytracing algorithm is used to analyse the plants impact of solar radiation (shadow casting) and on longwave radiation exchange (thermal shielding). A complex raytracing algorithm is used to analyse the plants impact of solar radiation (shadow casting) and on longwave radiation exchange (thermal shielding).
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 **TreePass: Understanding vegetation health requirements and simulate Wind Risk Assessment** **TreePass: Understanding vegetation health requirements and simulate Wind Risk Assessment**
-The impact of vegetation on the microclimate is only one side of the story. To grow and live, plants also need adequate local climate conditions fitting to their individual demand profile. Too much or too little sun, to heavy wind loads on the trees or stagnating air: Many aspects of the microclimate can interfere with the plants requirements and hinder a healthy and robust growth. Using our TreePass technology, the local growing conditions and the plants profiles can be matched to provide an optimal placement. Our wind risk assessment simulates the tree mechanics in order to assess the risk of wind and storm damage depending on the crown structure and the tree location. (TreePass Module to-come)+The impact of vegetation on the microclimate is only one side of the story. To grow and live, plants also need adequate local climate conditions fitting to their individual demand profile. Too much or too little sun, to heavy wind loads on the trees or stagnating air: Many aspects of the microclimate can interfere with the plants requirements and hinder a healthy and robust growth. Using our TreePass technology, the local growing conditions and the plants profiles can be matched to provide an optimal placement. Our wind risk assessment simulates the tree mechanics in order to assess the risk of wind and storm damage depending on the crown structure and the tree location.  \\ 
 +**The TreePass Module is still in development together with different cities and NGOs.**  
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 ===== Built environment & Building system===== ===== Built environment & Building system=====
  
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 ** Building energy performance ** ** Building energy performance **
 ENVI-met dynamically calculates the development of the building indoor temperature as a result of the incoming and outgoing fluxes through the associated wall and roof segments. This building energy simulation is executed parallel to the outdoor microclimate simulation for each building in the model domain so that a constant feedback between the outdoor and indoor climate conditions and of the interactions between buildings is provided. The recent version allows an initial zoning model to define building sections and thermal zones. ENVI-met dynamically calculates the development of the building indoor temperature as a result of the incoming and outgoing fluxes through the associated wall and roof segments. This building energy simulation is executed parallel to the outdoor microclimate simulation for each building in the model domain so that a constant feedback between the outdoor and indoor climate conditions and of the interactions between buildings is provided. The recent version allows an initial zoning model to define building sections and thermal zones.
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 ** Green Wall and Roof Systems** ** Green Wall and Roof Systems**
 ENVI-met allows a detailed simulation of the energy and vapour exchange processes take place at green walls and green roof tops. The //Green Wall System// (GWS) integrates seamlessly into the dynamic calculation of the building energy performance and the facade/ wall temperature and supports a wide range of different systems from simple climbing plants up to living wall systems. ENVI-met allows a detailed simulation of the energy and vapour exchange processes take place at green walls and green roof tops. The //Green Wall System// (GWS) integrates seamlessly into the dynamic calculation of the building energy performance and the facade/ wall temperature and supports a wide range of different systems from simple climbing plants up to living wall systems.
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 =====Data Analysis and Workflow Managment ===== =====Data Analysis and Workflow Managment =====
  
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 ** It's the format that matters...** ** It's the format that matters...**
-Starting with the WinterRelease 2019, we have added the option to export ENVI-met datafiles into the NetCDF format. This standard allows you to use ENVI-met datafiles directly in several other applications such as ESRI ArcMap or any other geospatial software. In addition, starting with Version 5, ENVI-met has also changed ALL outputfiles to be readable by standard CSV convnetions, including Python Pandas.+Starting with the WinterRelease 2019, we have added the option to export ENVI-met datafiles into the NetCDF format. This standard allows you to use ENVI-met datafiles directly in several other applications such as ESRI ArcMap or any other geospatial software. In addition, starting with Version 5, ENVI-met has also changed ALL outputfiles to be readable by standard CSV conventions, including Python Pandas.
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 **Visualisation and Analysis without bondaries** **Visualisation and Analysis without bondaries**
 ENVI-met ships with a large range of intuitive visualisation and analysis tools within LEONARDO. However, there is always a Dashboard never thought of and an AI routine that might discover new insights. Maybe you simply want to add some ofyour personal preferences to the grafic layout.  ENVI-met ships with a large range of intuitive visualisation and analysis tools within LEONARDO. However, there is always a Dashboard never thought of and an AI routine that might discover new insights. Maybe you simply want to add some ofyour personal preferences to the grafic layout. 
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 =====Internals===== =====Internals=====