Figure 6
The bar graph illustrates the correlation between the used energy for space heating in kilowatt-hours (kWh) and heating degree days (HDD) per day of the month, aggregated over the years 2018-2019. The x-axis represents the days of the month, ranging from 1 to 31. The y-axis on the left measures the used energy for space heating in kWh, ranging from 0 to 70,000 kWh. The y-axis on the right measures the HDD, ranging from 60 to 110. The graph features two data series: one represented by gray bars indicating the used energy for space heating and another represented by a blue line indicating the HDD. The gray bars show fluctuations in energy usage throughout the month, with notable peaks around the 10th, 20th, and 30th days. The blue line shows a general trend of higher HDD values in the middle of the month, peaking around the 20th day, and then declining towards the end of the month. All values are approximated.Correlation between the aggregated energy demand (used energy for space heating) and aggregated HDD