VDI 3807 PDF

Masho Characteristic consumption values for buildings — Characteristic heating-energy, electrical-energy and water consumption values. Abstract This vdi establishes a methodical basis for and assessment of the consumption of electrical vdi in existing buildings. Any specifics of the building, installations and user are taken into account when comparing the characteristic values. The described methods help, in particular, to identify potential for saving by comparing values to reference values for vdi buildings or premises. Air-conditioning equipment, Vfi, Building services, Buildings, Collection of data on vdi , Definitions, Determination of demand, Effectiveness, Energy conservation, Vdi consumption, Vdi demands, Vdu economics, Energy economy, Evaluations, Vdi engineering, Heat generators, Heating energy, Heating engineering, Heating technics, Vdi water costs, Hot-water demand, Lighting systems, Mathematical calculations, Vdi of power consumption, Operational techniques, Ratings, Thermal, Thermal efficiency, Thermal environment systems, Ventilation, Warm supply, Water, Water This Standard References Showing 10 of Characteristic values differentiated in terms of uses and dedicated zones are used to that end.

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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.

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