Boiler testing and calculation method

6.5 EuP LOT 1 - Boiler testing and calculation method This model is used to calculate the specific seasonal energy efficiency etas of a space heating boiler. The model contains possibilities to include several different types of space heating appliances in the efficiency calculations, such as boilers, heat pumps, electricity or solar systems. The types of heat pumps included in the model is air source and ground source heat pumps tested in either floor heating- or in radiator heating mode. The model only applies for space heating.
System limits Heat pump data is taken from tests according to EN14511, therefore the head losses from heat source fans or liquid pumps are taken into account in the heat capacity and COP data. This model also includes the heat sink liquid pump.
The model takes into account the net space heating demand, Lh, of the house. The heat demand of the house is a consequence of the choice of the load profile and the so-called system losses Lsys. The size of Lsys depends on the characteristics of the boiler and the installation characteristics. The system losses include fluctuation losses, stratification losses, distribution losses, buffer losses and timer losses, which are set as a percentage that is depending on the heat demand