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sector:energy:fuel_combustion:small_combustion:stationary_small_combustion [2022/01/04 14:23] – [Emission factors] juhrichsector:energy:fuel_combustion:small_combustion:stationary_small_combustion [2022/01/04 14:34] – [Activity data] juhrich
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 Activity data in source category //1.A.4// are based on the Energy Balance for the Federal Republic of Germany prepared by the Working Group on Energy Balances (AGEB) [(AGEB2021)]. For the period prior to 1995, separate Energy Balances are used for the new and old German Länder. Lines 66 (residential) and 67 (commercial, trade, services and other consumers) of the Energy Balance are of primary importance. Activity data in source category //1.A.4// are based on the Energy Balance for the Federal Republic of Germany prepared by the Working Group on Energy Balances (AGEB) [(AGEB2021)]. For the period prior to 1995, separate Energy Balances are used for the new and old German Länder. Lines 66 (residential) and 67 (commercial, trade, services and other consumers) of the Energy Balance are of primary importance.
  
-Since large quantities of wood fuels, used in households and in commerce and trade, are purchased privately or obtained from system owners' own forest parcels, data are outside official statistics. For this reason, in the Energy Balance, the relevant data from the Federal Statistical Office are supplemented with data from a survey of firewood consumption in private households. Data relative to use of firewood in the source categories commercial and institutional are based on a study from the year 2000. The consumption-level figures determined in that study have been adopted for subsequent years since then. +Since large quantities of wood fuels, used in households and in commerce and trade, are purchased privately or obtained from system owners' own forest parcels, data are outside official statistics. For this reason, additional studies are used by the Working Group on Renewable Energy Statistics (AGEE-Stat). 
 +The results for the residential sector are based on surveys of wood consumption carried out in the framework of the "Rohstoffmonitoring Holz" ("Monitoring of raw materials – wood") project.36 
 +That project collected data both on firewood purchased via commercial sellers and wood gathered in forests. For interim years, a regression model is applied that takes account of numbers of degree days, the price indexes for conventional fuels, and the heating systems, broken down by types, used in residential buildings. Conversions of volume units into energy units are carried out in conformance with the accepted conversion conventions of AGEE-Stat. 
 +Wood consumption in heat-generation-only systems of the commercial and institutional sector is derived via a remainder calculation. In the process, the data on total wood consumption (outside of private households), as determined via the "Rohstoffmonitoring Holz" surveys and via regression models, are blended with the relevant wood-quantity data from official energy 
 +statistics and the applicable wood-quantity data given by other relevant models. The wood consumption data derived via this approach, which relate to data on heat generation by CHP systems, are also part of the data on total wood consumption in the commercial and institutional sector.
  
 Energy data and emissions from small engines using biomass as fuel are reported in source category 1.A.1.a, since all the plants feed electricity into the local network. However a small amount of biogas and liquid biofuel, used for heat production, is reported in source category 1.A.4.  Energy data and emissions from small engines using biomass as fuel are reported in source category 1.A.1.a, since all the plants feed electricity into the local network. However a small amount of biogas and liquid biofuel, used for heat production, is reported in source category 1.A.4.