SOLARGE

Marstal District heating

Marstal, Denmark

District heating plant | 19,000 sqm installation

 


Project summary · Technical description · Financing · Development · Downloads

Project Summary

Description

In total there are seven different types of solar collector, mainly flat plate collectors, but also vacuum tupe, focusing and solar roofs are included.
Three different storages are in operation.
The project has been a really innovative project, precenting the following:
· new control mode in the form of variable flows, giving a slightly better performance, a 80 % reduce in power demand for pumping and meeting the demand for temperatures in a district heating network
· test of two new types of heat storages, one with gravel water and one pit heat storage. The pit heat storage showing promissing results in the terms of operating, low heat losses etc.
· being a place where a number of solutions for panel types, storage types etc. are presented




 


Building

Type of building

District heating plant

Number of dwellings, floors

1,420 users

Year of construction

different

Total living area (heated)

209,769 m2

Hot tap water consumption (measured/estimated)

not available

Whole energy consumption for heating purpose after CSTS implementation

19,034,000 kWh/a


System engineering

Year of construction of CSTS

1996–2003

Type of collectors

Flat plate collectors, vacuum tube collectors

Thermal power

12,850 KWtherm.

Aperture area of collectors*)

18,365 m2

Buffer storage

14,000 m3

Hot tap water storage

not available
(in the buildings)

Total capacity of boilers with energy source

18,000 kW

Type of hot tap water heating

Decentralised

Type of heating system

Centralised


Costs

Total cost solar system

7,333,000 Euro

Cost of the CSTS/gross area of collectors

386 Euro/m2

Subsidies

37 %


Output

Output of solar heat**)

8,824,000 kWh/a

Reduction of final energy***)

7,792,000 kWh/a

CO2-emissions avoided

2,500 t CO2/a

Solar performance guarantee

Yes


*) Aperture area = light transmitting area of the front glass
**) measured, between storage and piping to taps (solar system output)
***) related to the measured output mentioned before

 

 


Hans Grydehoej, General manager, GJ Teknik: 

„The Project in Marstal have, together with other projects at Aeroe, given basis for new industry at the small island of Aeroe.
The production of large solar panels and production of heat exchanger units are the main activities.
Latest a joint ventuere company with GJ Teknik and a Vietnamese company have started a full scale procuction in Ho Chin Min City in Vietnam.“

 

 


Owner and operator

Marstal District Heating
Leo Holm Petersen
Skolevej 13, Marstal, Denmark
Phone: +45 62 53 15 64
Fax: +45 62 53 25 64
info(at)solarmarstal.dk
www.solarmarstal.dk

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Technical description

 


Description of the CSTS

Year of construction of CSTS

1996–2003

Thermal power

ca. 12,850 kWtherm.

Gross area of collectors

19,000 m2

Aperture area of collectors

18,365 m2 

Type of collectors

Flat plate collectors, vacuum tube collectors

Type of assembly

Ground mounted

Orientation of collectors

South (0°)

Inclination angle to horizon

30–40°

Freezing protection

Glycol

Overheating protection

Night cooling via solar panels

Operation mode

Variable

Use of CSTS for

Hot tap water heating, space heating

Buffer storage

14,000 m3

Hot tap water storage

not available (installed in the buildings)

Control of backup-system/CSTS

Shared control


Hot tap water system

Type of hot water heating

Decentralised

Recirculation system

./.

For decentralised systems:
The installation on the consumer site

Hot water tanks

Size of storage for hot tap water

not available

Specification (if necessary)

./.


Space heating system

Type of heating system

Centralised

Number of boilers

6

Total capacity (power output) of boilers

18,000

Capacity of each boiler (year of construction)

not available

Energy source

Heating oil

Type of boiler system

Condensing


Type of operation

Operator of the CSTS system

ESCO

CSTS monitoring

Yes: all produced and used energy, all temperatures, all hours of operation etc. The control system does collect data hour by hour all time.

Data accessible via internet

No

Scientific monitoring & follow up

Yes

Maintenance contract

No

Visualisation of the solar heat output

not available


Yield of CSTS plant

Output of solar heat

8,824,000 kWh/a

Origin of data

Measured

Measuring point

Between collector and storage

Reduction of final energy

7,792,000 kWh/a

Origin of data

Monitored

Solar performance guarantee

Yes


Heat consumption

Whole energy consumption for heating purposes after CSTS implementation

19,034,000 kWh/a

Origin of data

Measured

Energy used for heating of

Hot tap water heating, space heating

Whole energy consumption for heating purposes before CSTS implementation

.27,858,000

Total tap water consumption

not available

Hot tap water consumption

not available

Hot tap water temperature

45–55 °C

Cold water temperature

8 °C

 

 


Summary



 


Planning and Engineering

Ramboll
Flemming Ulbjerg
Englandsgade 25,
DK-5100 Odense C., Denmark
Phone: +45 65 425800
Fax: +45 65 425999
FU(at)ramboll.dk
www.ramboll.dk


Architect

Havsteen-Mikkelsens tegnestue
Steffen Pedersen
Brogade 17
DK-5970 Aeroeskoebing, Denmark
Phone: +45 62 581215
Fax: +45 62 581630
steffen(at)havsten-mikkelsen.dk


Producer

Arcon Solvarme
Svend Andersen
Jyttevej 18,
DK-9520 Skorping, Denmark
Phone: +45 98 391477
Fax: +45 98 392005
arcon@arcon.dk
www.arcon.dk

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Financing and investment

 


Financing of the CSTS

Form of financing

Purchase

Distribution in percentage

30 %

(40 % self financing
23 % loans
37 % subsidies)


Costs of solar materials

Total cost of solar system

7,333,000 Euro

Detailed costs

not available


Operation costs of heating system

Power cost for pumping

48,000 Euro

Monitoring cost

6,500 Euro

 

 


Build in a number of phases. In general 30 % grants from Danish Energy Agency. Latest part partly subsidied by EU.

Grants: 2.700,000 EUR

Loans: 1,680,000 EUR
(1 % nominal interest reduction)

Financial support
Danish Energy Agency
Government agency
Jens Windeleff
Amaliegade 44
DK-1256 Koebenhavn K
Phone: +45 33 926700
Fax: +45 33 114743
jw@ens.dk
www.ens.dk

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Development & experiences

Qualitative aspects

The plant is part of a national strategy for development of large scale solar heating for district heating and for seasonal heatstorages.

The CSTS is now profitable,due to higher oil prices. At the time when established it was economic almost in balance after given the grants from Danish energy Agency and the European Commission. For the community of Marstal and Aeroe the project is a positive economic factor due to a number of visitors and the fact that less fuel is bought outside the community.

 


Experiences management

Experienced problems or failures?

Yes: control system

Found solutions to these problems or failures?

not available


Financial effects / project performance

Project economically efficient?

not available

Fiscal or other financial effects?

not available

Effects on rental fees?

not available


Experiences technical staff

Experienced problems or failures?

Yes: control system

Found solutions to these problems or failures?

No, only some of the problems are solved

 

Installer

GJ Teknik
Hans Grydehoj
Industrivej 5,
DK-5960 Marstal, Denmark
Phone: +45 62 532346
Fax: +45 62 531929
mail(at)gjteknik.dk
www.gj-teknik.dk

Scientific monitoring

ITW (University of Stuttgart)
Thomas Schmidt
Pfaffenwaldring 6
D-70550 Stuttgart, Germany
Phone: +49 711 685-63536
Fax: +45 711 685-63503
pm(at)itw.uni-stuttgart.de

Top of page Project summary · Technical description · Financing · Development · Downloads

Downloads

SOLARGE_goodpractice_dk_marstal.pdf

this datasheet in printable PDF-format

653 K

Marstal-District-heating_scheme.pdf

the hydraulic scheme

96 K