|Published (Last):||23 April 2017|
|PDF File Size:||19.39 Mb|
|ePub File Size:||6.9 Mb|
|Price:||Free* [*Free Regsitration Required]|
A limit-value lower than base, calculates the temperature cold sum. Degree day base Weather variables information Temperature 2m and relative humidity 2m : Comparable to measurements at 2 meters above ground. Growing degree days 2m : Absolute temperature difference between a base e. Calculated on hourly data instead of daily minimum and maximum. Pressure: Atmospheric air pressure reduced to mean sea level as most commonly used for weather reports. The local pressure varies with altitude. Locations at higher elevation have a lower local atmospheric pressure.
Precipitation amount: Total precipitation amount including rain, convective precipitation and snow. Snowfall amount: Fraction of total precipitation that falls down as snow and is converted to cm instead of mm. Low, mid and high cloud cover: Cloud cover at different altitudes.
High clouds km like cirrus are less significant for total cloud cover than low below 4 km like stratus, cumulus and fog or mid clouds km like alto cumulus and alto stratus. Solar radiation: Global radiation diffuse and direct on a horizontal plane given in Watt per square meter.
Wind speed: Hourly average wind speeds at given altitude levels "10 and 80 meters above ground" or pressure level " hPa". Units can be selected. Wind gusts: Short term wind speed turbulence in an hour. Gusts indicate the level of turbulence as such they could be lower than regular wind speeds.
VDI 3807 Blatt 1 „Verbrauchskennwerte für Gebäude; Grundlagen“
VDI 3807 Blatt 1: Ungenutzte Effizienzpotenziale in Gebäuden entdecken