Spatial distribution of emissions to air - the SPREAD model

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This report describes the first version of SPREAD. During the work process
on setting up the model a number of potential improvements has
been identified. In some cases the necessary data are available but is not
yet implemented in the inventory calculations or in SPREAD. In other
cases it is not known if data required for improvements exists and if it
can be made available for use in the inventory system or in SPREAD.
The potential improvements are described in the following paragraphs.
In all cases it will be considered both if it is possible to include the improvement
and if the benefit of the improvement is in proportion with
the required workload of implementation.
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In 2010 work has been carried out to improve the correctness of the EPT
(database from the DEA including fuel consumption for each district
heating or power-producing plant) e.g. all SNAP codes has been checked
and corrected according to the given facility type and size. The improved
dataset will be included in the next version of SPREAD.
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Improvements of the conversions will be incorporated if possible. The
Regional Inventory of energy consumption for heating for oil boilers, natural
gas boilers and solid fuel installations by the Danish Energy Agency
used for distribution of part of the emissions from stationary combustion
from area sources at SNAP 01, 02 and 03, is made for the year 2005.
It would improve the distribution to use an updated data set for the latest
historical year. The Regional Inventory is based on data from the
Building and Housing Register (BBR) by the end of 2005. In 2009 a new
version of BBR was released and inclusion of this new BBR could lead to
a better distribution. Wood combustion in residential plants is an important
source for a number of pollutants, e.g. particulate matter, PAHs and
some heavy metals. In the present model emissions from residential
wood combustion are distributed on municipality level according to the
Regional Inventory. To improve this part a model for distribution of
emissions from residential wood combustion created in the research project
WOODUSE could be applied. This model is based on a bottom-up
approach where the heating requirements are estimated on address
level. Data from BBR are used as input in the model and a number of criteria
are set up for estimation of the heating requirements, here among a
selection of which addresses should be included in the model. Before a
potential implementation of this sub-model, the criteria and equations
will be re-evaluated. A detailed description of the model is required if it
is implemented in a later version of SPREAD.