Archsim Energy Modeling for Grasshopper
Archsim Energy Modeling is a plugin that, for the first time, brings fully featured EnergyPlus simulations to Rhino/Grasshopper and thus links the EnergyPlus simulation engine with a powerful parametric design and CAD modeling environment.
Archsim allows you to effortlessly create complex multi-zone energy models, simulate them and visualize results without ever switching between tools. Archsim supports advanced daylighting and shading controls, ventilation modules such as wind and stack natural ventilation, airflow-networks, simple HVAC, photovoltaics and phase changing materials. It is typically used for rapid early design exploration where building shape, window to wall ratios, facade and glazing systems and passive approaches such as shading and natural ventilation potential are tested for their impact on the building environmental performance and comfort.
Simulation inputs such as model geometry, materiality, constructions and zone usage profiles are fully parametric and can be coupled with optimization algorithms within Grasshopper.
Archsim is a young tool under heavy development and new features are added frequently. Archsim exports native IDF files that are fully customizable. Besides EnergyPlus version 8-1-0 support the same workflow can also produce TRNSYS B17 files.
Urban Daylight Availability Simulations
The UrbanDaylight is a Rhino5 and Grasshopper plugin that allows designers to simulate and evaluate the daylight potential of large urban designs. The tool automates exterior DAYSIM simulations for all buildings in the city model. Given the solar radiation on the facades, it uses a generalized impulse response to compute the interior illumination on an hour by hour basis. This allows us to use the data for climate based metrics. You can download the paper here. Image credits: “Kendal Square Redesign” student design project at MIT Urban Modeling Seminar – by James Perakis and Josh Westerhold.
Daylighting – A Daysim interface for Rhino
Daylighting Beta is included in the UrbanDaylight plugin. This extends Rhino with regular Daysim simulation functionality. Here is a link to the creators of the Daysim simulation engine.