This project constitutes the product of my finishing bachelor project at Aarhus Maskinmesterskole. The project contains rules and demands described in Energiaftalen 2010-2020, along with calculations of energy reductions and projects initiated at Rønde Fjernvarme.
The project is based on Energiaftalen 2010-2020 which requires district heating plants to meet a yearly progressive reduction of the energy used. Rønde Fjernvarme is obliged to reduce the energy consumed by 360 MWh per year from 2010-2013, 630 MWh per year from 2013-2015 and finally 720 MWh from 2015-2020.
Present projects at Rønde Fjernvarme initiated to meet these demands are presented. In addition to these projects, coming regulations and fees which the district heating plants will be met with are described.
The project describes Rønde Fjernvarmes present projects for energy reduction which include optimization of feed temperature following the work of a previous bachelor project and optimization of return temperature. Optimization of the return temperature is includes a penalty fee and a small check-up of customer installations.
It is investigated how a reduction in energy usage comes about on the basis of better insulated pipes and how standard values may be applied to determine the magnitude of such.
It is described how conversion of homes from electrical and oil based heating to district heating leads to a reduction in energy usage and how this is quantified by standard values.
The accumulated energy reduction from the different projects is determined giving an overview over the possible energy reductions at Rønde Fjernvarme. From this it is concluded that Rønde Fjernvarme will be short 2000 MVh in 2020. This leads to assessments of whether Energiaftalen 2010-2020 needs revision so as to allow energy reduction to be done in the production plant. This may be a possible solution to the difficulties introduced by Energiaftalen 2010-2020.
Suggestions to the solution are based on political, financial and practical considerations. The working of a condensation plant is presented along with the technical considerations required. Calculations of the time need to pay for the condensation plant is presented based on actual data from Rønde Fjernvarme. Implications of return temperature optimization are explicitly included in the calculations. The effect of including energy reductions in the calculation is also considered.
Plans of fusion between Rønde and Thorsager district heating plants show how the structure of the organization may be enhanced helping to free up man hours which may be employed to meet the demands of Energiaftalen 2010-2020.
Based on the calculations it can be concluded that Rønde Fjernvarme should continue developing the projects for energy reduction and consider additional measures e.g. a condensation plant, in order to meet the requirements of Energiaftalen 2010-2020.