Grasshopper

algorithmic modeling for Rhino

0 | Ladybug
1 | AnalyzeWeatherData
2 | VisualizeWeatherData
3 | EnvironmentalAnalysis
4 | Renewables
5 | Extra
6 | Developers
7 | WIP

CDD_HDD

Component Index > Ladybug > 1 | AnalyzeWeatherData > CDD_HDD

Calculates heating and cooling degree-days.
Traditionally, degree-days are defined as the difference between a base temperature and the average ambient air temperature multiplied by the number of days that this difference exists.
By default, this component uses a more accurate calculation than the traditional method based on the minimum and maximum temperature of each day.
You may check the formulas in this page: "http://www.vesma.com/ddd/ddcalcs.htm"
If you rather to use the traditional method, set useDailyAvrMethod to True.

Inputs

NameIDDescriptionType
_hourlyDryBulbTemperature_hourlyDryBulbTemperatureAnnual dry bulb temperature from the Import epw component (in degrees Celsius).Goo
_coolingBaseTemperature__coolingBaseTemperature_Base temperature for cooling (in degrees Celsius). Default is set to 23.3C but this can be much lower if the analysis is for a building with high heat gain or insulation.Goo
_heatingBaseTemperature__heatingBaseTemperature_Base temperature for heating (in degrees Celsius). Default is set to 18.3C but this can be much lower if the analysis is for a building with high heat gain or insulation.Goo
useDailyAvrMethod_useDailyAvrMethod_set to "True" to use the traditional method of degree days calculation, which will calculate the average temperature of each day and sum up all of these temperatures over the year. This is opoosed to this component's default analysis, which will will examine each hour of the year and then convert results to degree-days.Goo

Outputs

NameIDDescriptionType
outreadMe!A summary of the input.String
daily_coolingDegDaysdaily_coolingDegDaysCooling degree-days summed for each day of the year. For visualizations of over the whole year, connect this to the grasshopper chart/graph component.Goo
daily_heatingDegDaysdaily_heatingDegDaysHeating degree-days summed for each day of the year. For visualizations of over the whole year, connect this to the grasshopper chart/graph component.Goo
monthly_coolingDegDaysmonthly_coolingDegDaysCooling degree-days summed for each month of the year.Goo
monthly_heatingDegDaysmonthly_heatingDegDaysHeating degree-days summed for each month of the year.Goo
annual_coolingDegDaysannual_coolingDegDaysThe total cooling degree-days for the entire year.Goo
annual_heatingDegDaysannual_heatingDegDaysThe total heating degree-days for the entire year.Goo

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