SOLARGE

NRGi

Samsø, Denmark

Others: District heating | 2,500 sqm installation


 


Project summary · Technical description · Financing · Development · Downloads

Project Summary

Description
Inhabitants from the two villages Nordby and Mårup on Samsø established a work group to investigate the possibilities for district heating for the two cities. The group evaluated that the power company NRGi should carry through the project because the company already had experience from another project, Tranebjerg district heating plant.
The plant is operated on commercial conditions. The plant was finished in April 2002 and the total invest sum was 2.74 mil. Euro. Today 185 individual houses (households) get the heat supply from the plant.
The solar energy is supported by a biomass boiler. The plant supersedes the usage of oil in the 185 consumer’s households.


 


Building

Type of building

District heating plant

Number of users / dwellings, floors

185 houses

Year of construction

./.

Total effective area (heated)

not available 

Hot tap water consumption (measured/estimated)

not available

Whole energy consumption for heating purpose after CSTS implementation

4,949,000 kWh/a


System engineering

Year of construction of CSTS

2002

Type of collectors

Flat plate collectors

Thermal power

1,750 kWtherm.

Aperture area of collectors*)

2,500 m2

Buffer storage

800 m3

Hot tap water storage

not available: individual in each house 

Total capacity of boilers with energy source

900 kW,
wood pit

Type of hot tap water heating

Decentralised

Type of heating system

(De)centralised


Costs

Total cost solar system

2,740,000 Euro

Cost of the CSTS / gross area of collectors

1,096 Euro/m2

Subsidies

44 %


Output

Output of solar heat**)

1,035,000 kWh/a

Reduction of final energy***)

not available

CO2-emissions avoided

not available

Solar performance guarantee

No

*) 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

 


 


Owner

NRGi Lokalvarme A/S
Christen Christoffersen
Dusager 22
8200 Århus N, Denmark
Phone: +45 87 390404
Fax: +45 87 390405
nrgi(at)nrgi.dk
www.nrgi.dk


Operator

See owner

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Technical description

 


Description of the CSTS

Year of construction of CSTS

2002

Thermal power

1,750 kWtherm.

Gross area of collectors

2,500 m2

Aperture area of collectors

2,500 m2 

Type of collectors

Flat plate collectors

Type of assembly

Field mounted

Orientation of collectors

South (0°)

Inclination angle to horizon

30°

Freezing protection

Glycol

Overheating protection

Drain back

Operation mode

Variable

Use of CSTS for

District heating

Buffer storage

800 m3

Hot tap water storage

not available: individual in each house 

Control of backup-system / CSTS

Separated coontrol


Hot tap water system

Type of hot water heating

Decentralised

Recirculation system

not available

For decentralised systems:
The installation on the consumer site

Hot water tanks

Size of storage for hot tap water

not available: individual in each house 

Specification (if necessary)

./.


Space heating system

Type of heating system

(De)centralised

Number of boilers

1

Total capacity (power output) of boilers

900 kW

Capacity of each boiler (year of construction)

No. 1: 900 kW (2002)

Energy source

Wood pit

Type of boiler system

Standard


Type of operation

Operator of the CSTS system

ESCo

CSTS monitoring

Yes: solar radiation, output of solar heat, total water consumption, temperatures.
The solar heat production pr. hour. Temperatures and flow is monitored and stored. NGRi is supervising the data.

Data accessible via internet

No

Scientific monitoring / follow up

No

Maintenance contract

No

Visualisation of the solar heat output

Yes: in MS-Excel


Yield of CSTS plant

Output of solar heat

1,035,000 kWh/a

Origin of data

Measured

Measuring point

Between collector and storage

Reduction of final energy

not available

Origin of data

supersedes individual oil consumption

Solar performance guarantee

No


Heat consumption

Whole energy consumption for heating purposes after CSTS implementation

4,949,000 kWh/a

Origin of data

Measured

Energy used for

Hot tap water heating, space heating

Whole energy consumption for heating purposes before CSTS implementation

Supersedes individual oil consumption

Total tap water consumption

not available

Hot tap water consumption

not available

Hot tap water temperature

55 °C

Cold water temperature

10 °C

 

 


Summary

The plant consists of 2,500 m² of field based solar panels. The panel field is connected to the heat exchanger in the heat only boiler plant. The solar panel circuit runs with antifreeze liquids and at variable speed. The heat is transferred to the DH-heating and stored in the 800 m³ tank. In periods with less sun energy or accumulated heat in the storage tank the demand is met by firing the wood chip boiler.


 


Planner

Planenergi
Per Alex Sørensen
Jyllandsgade 1
9520 Skørping, Denmark
Phone: +45 96 820400
Fax: +45 98 392498
planenergi(at)planenergi.dk
www.planenergi.dk

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Financing and investment

 


Financing of the CSTS

Form of financing

Contracting,
56 % self-financing

Distribution in percentage

44 %


Costs of solar materials

Total cost of solar system

2,740,000 Euro

Detailed costs for


Collectors

713,836 Euro

Elevation / mounting structure

not available

Storage / heat exchanger

not available

Backup heater

not available

Control

not available

Installation

not available

Planning / Engineering

not available

Others

not available


Operation costs of heating system

Increase of the operation cost after CSTS implementation

not available

 





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Development & experiences

 


Experiences management

Experienced problems or failures?

No

Found solutions to these problems or failures?

./.


Financial effects / project performance

Project economically efficient?

Yes

Fiscal or other financial effects?

not available

Effects on rental fees?

not available


Experiences technical staff

Experienced problems or failures?

See above

Found solutions to these problems or failures?

See above

 



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