Eigendeckung des Strombedarfs von Nichtwohngebäuden durch Photovoltaik - Eine Weiterentwicklung des DIN-Verfahrens durch standardisierte temperaturabhängige Lastprofile

Energy on-site coverage by PV-gain for non-residential buildings - An advancement of the DIN-approach by standardized temperature-dependent load profiles.

The rising importance of renewable energy production challenges both, execution in reality and legal calculation methods. Regarding the production of electrical energy via photovoltaics (PV), the current German national standard DIN V 18599 provides yet a simplified calculation approach within the monthly balance procedure of the energy consumption calculation. But the calculated internal use of PV-gains according to DIN is much higher than can be expected in real operation. Hence an alternative approach was developed, with the aim of a more realistic calculation of the internal usable PV-gains in non-residential buildings. Therefore, the developed calculation method considers the concurrency of electricity generation and electricity need on an hourly time scale by use of solar radiation profiles (SSP), standard load profiles (SLP), and temperature-dependent load profiles (TLP). Analytical investigations of the developed method for a sample building, using the TEK-Tool from Institute for Housing and Environment (IWU), confirmed a distinct overestimation of the calculated internal use of PV-incomes within the energy consumption calculation after DIN V 18599. The differentiated calculation of internal useable PV-gains in addition with the ability to consider battery storage devices for an increased internal use represents an expedient enhancement of the DIN method.