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2. Denmark


									Long Term Experiences
 Solar District Heating
      in Denmark

   Leo Holm, Marstal Fjernvarme DK
                  LARGE Potential in Denmark
DK Engineer Association, 2006: Energiplan 2030
 2030: 2.7 TWh / 10 % of the DK district heating demand (8 mill. m²)

Danish Energy Authorities, 2007: Solvarme – status og strategi

 2030: 2.7 TWh / 10 % of the DK district heating demand
 2050: 7 TWh / 40 % of the DK district heating demand

 Danish District Heating Association: Varmeplan Danmark

 2020: 4mill. m², 1.4 TWh, 5 % of the DK district heating demand
 2030: 8mill. m², 2.7 TWh, 10 % of the DK district heating demand
The period 1988 to 2006

• All plants built in the period from1988 to 2006, was
  built in combination with biomass

• All the plants were built with grants from the Danish
  government and/or the European Commission
     Integration of large scale solar
in combination with district heating CHP

      In 2006 a working group
        to study solar energy
     in combination with CHP
          was established
  The working group´s result
• Analyses of power system in western Denmark, with a
  large share of wind energy, shows that an increased
  share of environmentally friendly solar energy in heating
  market contributes to a better balance of power system,
  the heat bonding of thermal power stations is reduced.

  - The implementation of solar heating systems in CHP
  areas can be done in reasonable financial conditions for
  the company

  - Establishment of solar heating systems in CHP areas will
  have a positive socioeconomic and environmental
  impact under present price conditions.
  Some of the conditions for
achieving these benefits where
• The CHP plants should have the possibility to store
  (day storages or possibly seasonal storages depending on the size
  of ​the solar plant).
  - Solar panels should be installed as large plants in
  connection to a power station or large regional
  facilities in the district heating network.

  - Large solar heating is potentially more efficient
  and have much lower installations and operating
  costs than individual systems.
  Solar Plant in combination
        with CHP plant
 In 2007 the Brædstrup heating plant was the first
  heating plant which, combined solar and CHP.
 In 2008 the plant was followed by Strandby district
223.890 M2
Planned in 2013
223.890 M2
Planned in 2014
197.855 M2
223.890 M2
350.133 M2
 Why does the solar technology
   explode in Denmark??
Are the Danish District Heating companies crazy?

• I don’t think so!

Do they get massive subsidies?

• No – there is no standard subsidy. There are only grants
  available to new technologies or new composition of the
  technologies - and highly innovative projects
 Why does the solar technology
   explode in Denmark??
1. The experiences of large scale solar in combination with
   CHP and biomass plants are very good

2. The maintenance work is minimal

3. The maintenance costs are low: app. 0,5 EUR/MWh heat

4. Low production costs, 3 – 4 kWh electricity/MWh heat

5. Costs - all-Inclusive (included capital costs - 20-year loan of
   3% real rate): 30 – 40 EUR/MWh heat

           Production in Denmark: 450 kWh/m2
  Why does the solar technology
    explode in Denmark??

6. Low electricity prices in the summer month

7. High gas prices and tax
   Other new large scale projects in
    pipeline within the next year
                         Installed     Plan to install      Plan for pit
                           today                           heat storages

Gram District Heating    10.000 M2       31.000 M2          110.000 M3

Vojens Distric Heating   17.000 M2       45.000 M2          120.000 M3

District Heating            0        17.000 M2/45.000 M2    150.000 M3

Dronning Lund
District Heating            0            35.000 M2           65.000 M3
New project:
1. Additional 10,600 m2 solar to a total
   area on 18,600 m2
2. Establishment of a borehole storage
   (seasonal heat storage system) which
   stores solar heat from summer to
3. Installation of newly developed
   screw-compressor heat pump from
   Johnson Controls
4. Installation of an electric boiler on
   10,000 kW
Final extension:
50.000 m2 solar thermal
- And an expansion of
the borehole-storage

     The Solar history
        in Marstal
1994: 75 m2 test plant

1996: 8.038 m2 solar collectors

1999: 9.043 m2 solar collectors

2003: 18.365 m2 solar collectors

2012: 33.365 m2 solar collectors
Storage of the sun
       Storage in Marstal
1996: 2.100 m3 water storage

1998: 3.500 m3 earth pipe storage

2003: 10.000 m3 pit heat storage

2012: 75.000 m3 pit heat storage
          2.100 M3

 Arbejdstemperatur 30-95°
 3- 5 dages total forsyning
10.000 M3 Pit Heat Storage
The existing energy system


                              Solar collectors
                              Bio oil boiler
  SUNSTORE 4 Project

The project runs for a period of 4 years (1/7-
2010 to 30/6 2014)

The total budget for the project is 15,1
mill. Euros. From the EU, the project has
achieved 6,1 mil. Euros in grants.
        SUNSTORE 4 Project
•   15.000 M2 solar panels
•   4,0 MW wood chip boiler (willow)
•   750 kWel ORC
•   75.000 M3 pit heat storage
•   1,5 MW heat pump using CO2 as
 The new SUNSTORE 4 energy system





 Solar collectors   Heat pump   Wood chip boiler     Existing oil boiler
   Further information

Marstal District Heating
  address : Jagtvej 2, 5960 Marstal, DK

  tel.: +45 6253 1564 fax +45 6253 2564 or

      E-mail: info@solarmarstal. dk
Thank you
 for your

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