Solar Thermal in Sweden

Solar Thermal inSweden

Visiting group from Bulgaria

Stockholm 2008-05-29

Arne Andersson

Swedish Energy Agency

arne.andersson@energimyndigheten.se

What will be spoken

• Possibilities in Sweden

• The swedish situation

• Environmental advantages

• Technics

• Examples

• Economy

Main issues for solar thermal

• What kind of energy is replaced by solar thermal ?

• What kind of environmental benefit is connected

• Is there any reduction on green-house-gases ?

Who gains the most ?

• Solar heating is more interesting for the endconsumer than the energydelivering company

• It is more a way of saving energy than producing energy

• The value for the endconsumer is 1.00 Sek/ kWh or more, but for the energy producer it is about 0.30 Sek /kWh.

Sweden

9 million inhabitants Large bioenergy sources ~250 000 sqm of solar

collectors, i.e. ~ 25 sqm per 1000 capita

Small but developing solar energy association …

Small but positive development for solar heating ….

Main applications

Pioneering solar district heating

Pioneering roof module collectors on multifamily buildings

Majority of solar systems are combined with wood chips, briquettes and pellet boilers …

Preheating hot water in single and multifamily buildings ...

Market introduction

• Misc. R&D programs 1975-2003

• Misc. investment subsidies 1978-1997

• Quality label introduced in 1990

• Performance based investment subsidy from 2000- … ( at present until 2010),

• Initiated and evealuated by Energimyn-digheten, Boverket and Svensk solenergi

• Adoption of Solar Keymark

Solar district heating

Kungälv 200010 000 sqm ~ 7 MWth

Swedish technology !?

There are ~120 systems with >500 sqm solar collectors in Europe ... (>350 kW thermal power)

>20% are in Sweden .. ! ~40% of the collector area with

modules developed in Sweden .. ! ~60% of the collector area with

Swedish absorbers .. !

Solar heating plants

> 350 kWth

> 3 500 kWth

Systems

• Combisystems for single family houses – Boiler + 500 – 1 500 liter tank + 10 sqm collectors

• Solar hot water for single family houses - 5 sqm colectors + 300 liter (Electric heater)

• Solar hot water and/or combisystems for multifamily buildings - 3-5 sqm per apartment; 100 liter/sqm - 1 sqm per person

Vallda, 150 m², 1982-

Since 1978

EKSTA/Onsala ~ 220 m² - 1995

Lunden Onsala 1995

Mounted directly on the roof trusses

Gårdsten 2000

LESOL AB – 2006/2007

The most installed

Collector in Sweden

”Houses without heating system” – Lindås - 2003

Solar thermal in SwedenGlasade solfångare - Sverige [MW th]

Källa: SP o. Svensk solenergi

0

5

10

15

20

25

98 99 00 01 02 03 04 05 06 07

Anl >100 m²

Anl 15-100 m²

Villa <15 m²

Villavärme [GWh]

0

1 000

2 000

3 000

98 99 00 01 02 03 04 05 06

Solvärme

Pellet

Solar 3% in relation to

use of pellet!

Pool collectors [MWth]

0

5

10

15

20

25

98 99 00 01 02 03 04 05 06

Sweden

Sample in AustriaSpa

Camping

Solar heatGlazed collectors

Flat plate collectors

Vacuum tube collectors

Support for installationSubsidies

• Investment grant 2.50 SEK/ inst. kWh/ Year

• Only energy verified collectors

• Investment grant since the year 2000

• Will last until 2010-12-31 under the same terms (as far as we know today)

• 2.50 SEK~ 0,40 USD-cents or 0.35 Euro-cents

• Carried out by The National Board of Housing and Planning

Principle of solar thermal system

Solar collector

Hot water tank with heat

exchanger spiral

Auxiliary energy

Hot waterCold water

Principles for solar thermal system

Solar heating plant principle

ForbrugereSolfangerfelt Consumers

District heating boiler plant

Solar collector field

Solar heating for swimmingpools