Detailed national renewable energy scenario

Energy type/quality Annual average use (WIcap.)  

Time variations in wind power are determined by passage of weather front systems. Typical passage of fronts over Denmark has a pattern exhibiting similar conditions over periods of a few days. This has implications for the amount of energy storage that would remove the mismatch between variable wind power production and demand. Lulls are followed by periods of high winds with delays of typically 3-6 days and very rarely over 12 days. 

Time variability of wind is discussed in more detail in Sorensen (2004a). An impression of the situation can be obtained from looking at Fig. 5.84, 

Designated offshore wind farm areas 1 Hom Reir. 41550 TJ/y 2. LAse 623 TJ/y 

For bio-energy resources, residues from households and food industry are available year roimd, and fresh biomass, whether harvested or collected, can usually be stored, so that conversion may take place at a time convenient for the conversion capacity or desirable from the point of view of users. The scenario use of biomass is primarily for production of biogas, liquid biofuels such as methanol or eventually hydrogen. 

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