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ISO 13675-2013 pdf free download
ISO 13675-2013 pdf free download.Heating systems in buildings — Method and design for calculation of
the system energy performance — Combustion systems (boilers)
Systèmes de cha uff age dons les bâtiments — Méthode de conception et de calcul de Ia performance énergétique des systèmes — Systèmes de combustion (chaudières).
Qii,gen,is.rI,i Generation sub-system thermal loss recoverable for space heating
QH.gen.Is,rbl.th Generation sub-system thermal loss (thermal part) recoverable for space heating
Qjen, rbl,aux Generation sub-system recoverable auxiliary energy
Qn.gcn,Is,nrbl,th Generation sub-system thermal loss (thermal part) non recoverable
QH.gen.nrti.aux, Generation sub-system non recoverable auxiliary energy
NOTE Figures shown are sample percentages.
Figure 1 — General generation sub-system inputs, outputs and energy balance
4.5 Generation sub-system basic energy balance
The basic energy balance of the generation sub-system is given by
Egen,in Qgen.out Qgen,aux.rvd +Qgen. Qgen.ren (1)
Egcn,jn is the energy input of the generation sub-system (fuel input) (in the calculation interval), in kWh;
Qgen,out is the energy supplied to the distribution sub-systems (e.g. space heating and domestic hot water) (in the calculation interval), in kWh;
Qgen.aux.rvd is the auxiliary energy recovered by the generation sub-system (e.g. pumps, burner fan, etc.) (in the calculation interval), in kWh;
Qgen.ls is the thermal losses of the generation sub-system (e.g. through the chimney, generator envelope, etc.) (In the calculation interval), in kWh;
Qgen.run is the regenerative energy contribution (in the calculation interval), in kWh.
NOTE 1 Qgen,Is takes into account flue gas and generator envelope losses, part of which may be recoverable for
space heating according to location of the generator. See £22.
NOTE 2 Generally biomass boilers arc not designed for controlling the emission part of heating systems.
NOTE 3 Qgen,ren is normally not used with boilers.
If there are multiple generation sub-systems or multiple boilers, see input data generator systems”.
If the generator provides heat for heating, cooling, ventilation and domestic hot water, the index H shall be replaced by C, V or W. In the following only H is used for simplicity.
The heat load calculation will be written in another standard.
5 Generation sub-system calculation
5.1 Available methodologies
This subclause describes the calculation method for the heat generation sub-system.
This method takes into account the specific operation conditions of the individual installation by taking the certified product value provided either by the manufacturer or taken from informative Annex A. or by measuring the needed values on-site.
The considered calculation step can be the heating season but may also be a shorter period (month, week and/or the operation modes according to ISO 13790). The method is not limited and can be used with the default values given in informative AnnexA.
For existing boilers the calculation by measured values takes the losses of a generator which occurs during boiler cycling (i.e. combustion losses) in consideration. This method is well adapted for existing buildings and to take into account condensation heat recovery according to operating conditions.
The calculation methods for biomass combustion systems differ with respect to:
— type of stoking device (automatic or by hand);
— type of biomass fuel (pellets, chipped wood or log wood).
Data to characterize the boiler shall be taken from one of the following sources, listed In priority order:
a) measured data (see £21);
b) product data from the manufacturer, if the boiler has been tested and certified (see £2.2); c) default data from Annex A (see £22).
It shall be recorded if the efficiency values include or not auxiliary energy recovery. NOTE l3iomass boilers with automatic stocking fired by pellets or chipped wood.ISO 13675-2013 pdf free download.
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