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Ladybug

Climate & Comfort Analysis with LadyBug

  |   environmental design, Guides and tutorials

NOTE: The patches available for download use Honeybee & Ladybug 0.0.61 version Feb 05 2017. Using different version could cause problems. In that case it is strongly recommended to rebuild the patches with the owned version


 

CLIMATE ZONE IDENTIFICATION 

To design a building able to preserve the environment and exploit the available natural resources the first thing to do is the knowledge of the climate zone in which the building will be located.

Internationally, the Koppen-Geiger Climate Classification is the most diffuse system which offers us specific indications covering the whole world.

https://en.wikipedia.org/wiki/Köppen_climate_classification

According to the detected climate zone it will then be possible to select, from the scientific literature, the most appropriate design strategies. (see M. DeKay, G.Z. Brown, Sun, Wind & Light, Wiley III ed. 2013).

 

Another system is the ASRHAE classification system, developed in the USA, that can be extended by analogy to other parts of the world.

https://www.wbdg.org/resources/building-enclosure-design-principles-and-strategies 

In this case, for each climatic zone, the ASHRAE Agency has defined corresponding technological solutions for the building envelopes that are also present, by default, in the majority of energy software. As the design strategies have been identified, this second method can therefore be useful for detailing the technological solutions of the project.

 

The climate zone can easily be determined using the following Grasshopper-Honeybee patch

http://www.mailab.biz/wp-content/uploads/4.GRASSHOPPER_PATCHES/01.HBCLIMATE_ZONE_DEFINITION_.gh

CLIMATE & COMFORT ANALYSIS   

For a more detailed analysis about Weather, Sun geometry, Wind and Comfort use the following LadyBug-Grasshopper patches.

Ladybug is a free and open source environmental plugin for Grasshopper to help designers create an environmentally-conscious architectural design. The initial step in the design process should be the weather data analysis; a thorough understanding of the weather data will, more likely, lead designers to high-performance design decisions.

Ladybug imports standard EnergyPlus Weather files (.EPW) in Grasshopper and provides a variety of 2D and 3D designer-friendly interactive graphics to support the decision-making process during the initial stages of design. The tool also provides further support for designers to test their initial design options for implications from radiation and sunlight-hours analyses results. Integration with Grasshopper allows for an almost instantaneous feedback on design modifications, and as it runs within the design environment, the information and analysis is interactive.

 

01.COMFORT PERIOD ANALYSIS

This patch makes it possible to visualize climate  values (such as temperatures, humidity,…) of a specific location based on .epw file containing hourly standardized weather data and to calculate on  the comfort periods in a year, season, day,..

02.SUN PATH ANALYSIS & TEMPERATURE

This patch makes it possible to visualize solar geometry integrated with  outdoors temperatures of a specific location based on .epw file

03.PSYCHROMETRIC CHART ANALYSIS

This patch makes it possible to visualize adaptive comfort and passive design strategies for a specific location  based on .epw file

04. CLIMATE THERMAL COMFORT ANALYSIS

This patch makes it possible to visualize comfort conditions for a specific location using different methods and, among others, the Standard Universal Thermal Climate Index

05. ENVIRONMENTAL INDOOR REQUIREMENTS

This patch makes it possible to visualize comfortable  indoor temperatures and humidity values for a specific location using the users’ satisfaction method

06. WIND-ROSE ANALYSIS

This patch makes it possible to visualize  characteristics of  winds (such as direction, speed, frequency) for a specific location based on .epw file and  to restrict the analysis to hot/cold periods of the year

 

 


link 

Energy modeling with Grasshopper. Plugin installation & Tutorials playlist

Grasshopper basics. Tutorials from the program developer

 How to set the appropriate analysis period and users’requirements