The future district heating system. Low resource district heating
District heating creates the possibility for flexible energy usage. The intention of the energy savings effort is true fuel-saving measurements and consequently obtaining reduced CO2 emissions. One-sided focus on a reduction of the net heat demand in new buildings will enforce a distortion of the entire energy system, undermine the basis for the flexible energy system, and simultaneously be a very expensive method to reduce the fuel need and coherent CO2 emission.
This project will clarify these big challenges, both with regard to creating new standards of how to exploit and include the benefits of district heating supplying new and existing buildings and with regard to generating new technological concepts for district heating.
This project will develop, demonstrate and disseminate effective low resource district heating and block heating with low CO2 emission.
To obtain this, the project consists of four phases, project management and dissemination:
Phase 1: Development of a method to include renewable energy and CHP from common heating solutions (e.g. district heating and block heating) in the calculation of energy demand in buildings (BR08);
Phase 2: Demonstration and evaluation of the benefits and interaction when a building producing renewable energy is connected to a district heating system;
Phase 3: Development and demonstration of af highly efficient and low CO2 emission decentralised district heating system utilising the flexible and intelligent energy system;
Phase 4: Publishing ''Best practice''/Forsyningskatalog (Supply catalogue): Guidelines for highly efficient and low CO2 emission decentralised district heating system, including calculation examples
Based on the actual ratio between the quantity of fuel used to produce the unit of heat and the final amount of delivered heat the primary energy factor is calculated to indicate if it is fair to benefit buildings supplied with district heating.
The initial idea was to establish solar heating in selected houses on the entire rooftop and produce far more heat than traditional individual solar panels. Then different heating solutions for low energy buildings should be examined, evaluated and demonstrated with particular focus on solutions in buildings with renewable energy production and connection to a district heating network.
Along the way, it has become very clear that many components have large heat losses in relation to the requirements for low energy buildings.
Many times it will be possible to reduce the total energy needs with several kWh/m2 by choosing a better insulated product - it might be what makes a district heating supplied house meeting the energy requirement or not.
The idea of this project is to demonstrate how district heating of future residential areas can be economically and environmentally optimal. District heating supply of the area will differ from traditional district heating systems in several ways:
• Establishment of heat producing units in the form of solar panels and a centrally located, heat pump. Both types of units supplying heat to the district heating network.
• The solar panels are placed partly on the ground and partially integrated into individual rooftops, and the heat pump will be located centrally in the area.
• On an annual basis it will produce as much heat as consumed in the area, mind you based on CO2-neutral renewable sources.
The project has been delayed several times due to the lack of new houses been built in the chosen area. It is now abandoned to proceed with phase 3 and the project is finished without completing phase 3
Key figures
Category
Dokumenter
Participants
| Partner | Subsidy | Auto financing |
|---|---|---|
| ADVANSOR A/S | 0,04 mio. DKK | 0,82 mio. DKK |
| ARCON SOLAR A/S | 0,04 mio. DKK | 0,65 mio. DKK |
| BRÆDSTRUP FJERNVARME A M B A | 1,77 mio. DKK | 11,63 mio. DKK |
| Danfoss A/S | 0,06 mio. DKK | 1,20 mio. DKK |
| NEAS ENERGY A/S | 0,09 mio. DKK | 0,03 mio. DKK |
| PlanEnergi | 0,19 mio. DKK | 0,23 mio. DKK |
| Rambøll | 1,98 mio. DKK | 0,73 mio. DKK |
| Aalborg Universitet (Fredrik Bajers Vej) | 0,30 mio. DKK | 0,08 mio. DKK |
| Teknologisk Institut | 0,53 mio. DKK | 0,17 mio. DKK |
Contact
Rambøll Danmark
Hannemanns Allé 53
DK-2300 København S
www.ramboll.dk
Holm, Peter , 51617428, ptrh@ramboll.dk
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