Solar resource assessment in Denmark (IEA-SHC participation)

Mostly, these years have been made by the Danish Meteorological Institute (DMI) using DMI data from the period 2001-2010. Additionally, estimated diffuse solar irradiances for the reference year data have been calculated by the participants from the Technical University of Denmark (DTU). These estimations are based on several years of measurements of both global radiation and diffuse solar irradiances. For the DMI global radiation data, key statistics describing the variability of global radiation in Denmark has also been calculated.

During the project, we have encountered much interest in the new DRY data. These data are used to perform realistic simulations in which the weather is of importance. The DRY, as they are made here, primarily contain parameters that are important for solar heating plants. They can, however, be used as a basis for a more expanded DRY dataset with parameters that are important for other purposes.

DTU have tested the DRY by performing simulations of solar heating plants in different DRY regions of Denmark. The yearly thermal performance for the new DRY for Bornholm is between 15% and 34% higher than the thermal performance for the old DRY. For the other Danish regions the extra thermal performance for the new DRY, as compared to the old DRY for Denmark, is in the range from -2% to +25%.