In one of the district heating cooperatives that we manage a large part of the district heating grid is more than 30 years old.
Therefore, we have developed a renovation plan to get an overview of the future renovation projects and the economic consequences for the heating price.
In order to develop the renovation plan we have made an extraction of all the areas with a district heating grid older than 30 years. The extraction entails a detailed overview of each area comparing the renovation either by exchanging the pipes or muff joints on the existing grid, and the consequences on the district heating cooperative’s depreciation. The calculation of the depreciation is based on life time, current prices, and energy savings. The type of renovation resulting in the lowest yearly depreciation is always prioritized in order to keep the heating price at a low level. To give a more tangible picture of the consequences by each renovation project, the impact of the heating price pr. consumer is visualized.
The extraction for each area is collected in an overall renovation plan, where the areas are prioritized based on age, known errors, the age of the heat service line, and knowledge about the alarm system. This overview functions as a guideline over future renovation projects.