decentralised sdh systems swedish experience
TRANSCRIPT
SDH - Malmö - April 9, 2013 1 Jan-Olof Dalenbäck
Decentralised SDH Systems – Swedish Experience
Jan-Olof Dalenbäck Professor CHALMERS CIT Energy management AB Partner: SDH+
SDH - Malmö - April 9, 2013 2 Jan-Olof Dalenbäck
DH operators make their own SDH plants .. and sell solar boosted heat ..
ESCO‘s / Building owners / build solar heating plants connected to DH systems ..
“Contract between plant owner and DH provider!“
SDH .. Operators .. Applications ..
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Block and District heating
100-70 °C
40-50 °C
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Central SDH system
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Marstal District Heating - DK 18 000 sqm – 13 MWth
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Distributed SDH systems
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Distributed SDH systems ..
Return 40-50 °C
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Distributed SDH Plant in Graz
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Distributed SDH systems ..
• Rather simple .. HX ..
• Designed based on available area and DH pipe dimensions ..
• Should meet basic requirements for pressure and temperature ..
• Possible with different ownerships ..
• O&M is a key issue ..
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Grid-connected solar heat .. ?!
• DH system – an infrastructure used to buy and sell heat .. Why not solar heat ?
• Solar and DH system - different voltage !?
• Requires an agreement between the plant owner and the DH provider ..
• Nearby invented in EPBD ..!?
• Possible to develop new business models for DH operators ..?
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Background
• 1st system in Skive, DK – 1994 ?
• Several systems Bo01 in Malmö, 2001 ..
• A number of systems in Graz, AT
– Operated by ESCO’s ..
• Several new small systems in SE, 2002- ..
– Operated by building owners ..
– Majority of systems in DH by E.ON ..?
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Bo01 - Malmö
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Bo01 Malmö
Bo01 - Malmö
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Kockum Fritid – Malmö - 2001
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Site built HX units
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Malmö - 2006
Prefab HX units !!
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Malmö - 2008
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Vislanda - 2009
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Timrå - 2009
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Karlstad – 2009
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Göteborg – 2010
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Stockholm – 2010
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Karlstad – 2011
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Supervision via Internet
Prefab units
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Evaluation of 22 plants
• Misc. background, different contracts, different O&M ..
• Different orientations .. shadowing ?
• Different collectors & tilt ..
• Different DH return temperatures ..
• Rather small ..
• Results in different yields ..!
• But .. 100-300 kWh/a.m2
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Collector (gross) area [m2]
Annual yield [kWh/m2]
E.ON
Others
Malmö
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Malmö
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J F M A M J J A S O N D J F M A M J J A S O N D
Monthly yield [kWh/m2] 2011-2012
Augustenborg
Stensjön
Heleneholm
SegePark
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Other plants - Misc. sites
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20
30
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J F M A M J J A S O N D J F M A M J J A S O N D
Annual yield [kWh/m2] - 2011-2012
Gårdsten
Molkom
Örnen
Vislanda
Måsta
Glottran
Nya Järpen
Ödåkra
SDH - Malmö - April 9, 2013 29 Jan-Olof Dalenbäck
Experiences !
• Different conditions .. !
• Some poor contracts .. ! Low cost !
• Some poor operation .. !
• Some poor O&M .. !
• Misc. problems .. !
• Lack of knowledge .. !
• Lack of interest .. !
SDH - Malmö - April 9, 2013 30 Jan-Olof Dalenbäck
Recommendations !
• Better conditions .. !
• Appropriate contracts .. !
• Improved controls .. !
• Appropriate O&M .. ! (DH provider?)
• > 300 kWh/a.m2 .. !
SDH - Malmö - April 9, 2013 31 Jan-Olof Dalenbäck
Acknowledgement
• Financial support by the Swedish District Heating Association
• Evaluation team: Peter Kovacs, SP Techn. Res. Inst. Per-Erik Andersson-Jessen, A&H Gunnar Lennermo, Energianalys Göran Johansson, Armatec (Per Rosén, E.ON)