Dronninglund Fjernvarme

Johan Frey, manager
Dronninglund Fjernvarme
World largest solarpowerplant
for distrikt heating
Berliner energietage
may 21., 2014
Dronninglund Fjernvarme
Started November 19, 1959 as A.m.b.a. company
(A.m.b.a = cooperative society with limited liability,
ie that participants are liable only for their
contributions to the company and not with their
entire fortune. In 2014 it is app. 600€)
1,350 customers
Approximately 50 kilometer of pipes
Annual production of 40,000 MWh
Turnover approx. 4 mill. €
Production plants
Four Gas Engines, Caterpillar 3516, 3.6 MW EL 6.4
MW heat
An emergency gasboiler, 8 MW of heat
One boiler with associated absorption heat pump.
A total of 6 MW
One hot water boiler 10 MW
And from 2014, 37,000 m2 of Solar panels, approx.
27 MW with associated heatstorrage of 62,000 m3
of water. Approximately 18,000 MWh annually
Energy production before 2014
In 2006, as we had to find
replacement for two old oil-boilers
So the customers instructed the Board that:
The project realization should not result in
increasing the price of heating. (according to Danish
law, you cannot make a profit from selling heat)
50% phase-out of fossil fuels in the first phase.
In the long run up to 100% phase-out of fossil fuels.
Ensure heat supply for the future.
Incentives 2006
• High taxes on natural gas.
App. same level as the gas price itself.
No tax on solar.
• Not allowed to use biomass at natural gas fired
plants
• Saved CO2 quotes could be sold
• Municipal guarantee for loans
Why solar thermal?
Principle diagram for solar and
natural gas fired CHP (max18-20% solar)
50% solar power
SUNSTORE 3
Future energy production for
Dronninglund Fjernvarme
Large pitstorrage can integrate renewable electricity in heat production.
EL- boiler
EB
Heatpump
HP
CHP
Combined heat
and power
35 – 40 000 m²
50 – 100 000 m3
Very cost effective heat storage
Boiler
End use
Benefits from combining technologies
Solar:
Produce free heat
Heat pump:
Produce cheap heat
Fast capacity
regulation (load) 
earn money
Reduce storage
volume
CHP:
Produce valuable
electricity  earn money
Fast capacity regulation
(prod.)  earn money
Storage:
Gives flexibility
Makes combinations
possible
Damvarmelager
17,7 millioner kr.
Bygning 18
millioner kr.
Fjernvarmerør
10 millioner kr.
Solfangerfelt 45,5
millioner kr..
Søndervang 6,8
millioner kr.
Design of pit heat storage
Investment
Heat storrage, 62.000 m3 (38,7 Euro/m3)
Buildings
Solarpanels
District heating pipes
Booilerplant and heatpump
Building interest and contingencies
Total investment hadware
Consulting engineers
EUDP (subsidies from Danish Department of Energy)
Nettoinvestment (Municipal guarantee for loan)
t.EURO
2.400
2.400
6.100
1.340
920
800
13.960
673
-2.953
11.680
Experience with large
solar installations
Easy to operate, runs unattended most of the time
Little maintenance: Shaft seals, filters and areainspection
Operating expenses:
Approximately 15 cent per. MWh solar
Power consumption:
2,5 - 3 kWh el/mWh solarheat.
Cons for large solar installations :
• Requires large areas of land
• Requires large heat storage
• Expensive investment per. mWh
• Not reliable fuel supplier (on a short basis)
Benefits from large solar installations
 Cleaner environment
 Power supply is inexhaustible
 Trouble-free operation
 Low operating costs
 Satisfied consumers
 Replacing fossil fuels
 You know the "fuel price" 30 years into the future.
(Provided the Minister for Taxation can keep his dirty fingers away)
Barriers for large solar installations
Authority proceedings
Large storage and heat pumps
Taxes on heat pumps
Natural gas companies.
Lack of knowledge of solar energy
For how long a time are
solarpanels expected to last?
Inlet manifold
Exhaust manifold
Conclusion
• Apart from the teflon foil, the collectors are in an
exceptionally good condition.
• Rated lifetime of the solar collectors: Approximately
30 years
• Solar panels have improved since the 1990s
Final Report by: Ziqian Chen, Jianhua Fan, Bengt Perers og Simon
Furbo, DTU Byg rapport R-210.
Download available at: www.byg.dtu.dk
For further information please contact:
Dronninglund Fjernvarme.
Att
: Johan Frey
Address : Tidselbak Allé 18,
9330 Droninglund
Denmark
Tel: +45 98 84 14 78
Email: [email protected]