Decentralised SDH Systems Swedish Experience Jan-Olof Dalenbck - PDF document

Decentralised SDH Systems – Swedish Experience Jan-Olof Dalenbäck Professor CHALMERS CIT Energy management AB Partner: SDH+ SDH - Malmö - April 9, 2013 1 Jan-Olof Dalenbäck SDH .. Operators .. Applications .. 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 - Malmö - April 9, 2013 2 Jan-Olof Dalenbäck  2

Block and District heating 100-70 °C 40-50 °C SDH - Malmö - April 9, 2013 3 Jan-Olof Dalenbäck Central SDH system SDH - Malmö - April 9, 2013 4 Jan-Olof Dalenbäck

Marstal District Heating - DK 18 000 sqm – 13 MW th SDH - Malmö - April 9, 2013 5 Jan-Olof Dalenbäck Distributed SDH systems SDH - Malmö - April 9, 2013 6 Jan-Olof Dalenbäck

Distributed SDH systems .. Return 40-50 °C SDH - Malmö - April 9, 2013 7 Jan-Olof Dalenbäck Distributed SDH Plant in Graz SDH - Malmö - April 9, 2013 8 Jan-Olof Dalenbäck

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 .. SDH - Malmö - April 9, 2013 9 Jan-Olof Dalenbäck 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 ..? SDH - Malmö - April 9, 2013 10 Jan-Olof Dalenbäck

Background • 1 st 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 ..? SDH - Malmö - April 9, 2013 11 Jan-Olof Dalenbäck Bo01 - Malmö SDH - Malmö - April 9, 2013 12 Jan-Olof Dalenbäck

Bo01 Malmö Bo01 - Malmö SDH - Malmö - April 9, 2013 13 Jan-Olof Dalenbäck Kockum Fritid – Malmö - 2001 SDH - Malmö - April 9, 2013 14 Jan-Olof Dalenbäck

Site built HX units SDH - Malmö - April 9, 2013 15 Jan-Olof Dalenbäck Prefab HX units !! Malmö - 2006 SDH - Malmö - April 9, 2013 16 Jan-Olof Dalenbäck

Malmö - 2008 SDH - Malmö - April 9, 2013 17 Jan-Olof Dalenbäck Vislanda - 2009 SDH - Malmö - April 9, 2013 18 Jan-Olof Dalenbäck

Timrå - 2009 SDH - Malmö - April 9, 2013 19 Jan-Olof Dalenbäck Karlstad – 2009 SDH - Malmö - April 9, 2013 20 Jan-Olof Dalenbäck

Göteborg – 2010 SDH - Malmö - April 9, 2013 21 Jan-Olof Dalenbäck Stockholm – 2010 SDH - Malmö - April 9, 2013 22 Jan-Olof Dalenbäck

Karlstad – 2011 SDH - Malmö - April 9, 2013 23 Jan-Olof Dalenbäck Prefab units Supervision via Internet SDH - Malmö - April 9, 2013 24 Jan-Olof Dalenbäck

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.m 2 SDH - Malmö - April 9, 2013 25 Jan-Olof Dalenbäck Annual yield [kWh/m 2 ] 500 400 E.ON Others 300 Malmö 200 100 0 0 200 400 600 800 1 000 1 200 Collector (gross) area [m 2 ] SDH - Malmö - April 9, 2013 26 Jan-Olof Dalenbäck

Malmö Monthly yield [kWh/m 2 ] 2011-2012 80 70 Augustenborg 60 Stensjön Heleneholm 50 SegePark 40 30 20 10 0 J F M A M J J A S O N D J F M A M J J A S O N D SDH - Malmö - April 9, 2013 27 Jan-Olof Dalenbäck Other plants - Misc. sites Annual yield [kWh/m 2 ] - 2011-2012 80 70 Gårdsten Molkom 60 Örnen Vislanda 50 Måsta Glottran 40 Nya Järpen Ödåkra 30 20 10 0 J F M A M J J A S O N D J F M A M J J A S O N D SDH - Malmö - April 9, 2013 28 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 29 Jan-Olof Dalenbäck Recommendations ! • Better conditions .. ! • Appropriate contracts .. ! • Improved controls .. ! • Appropriate O&M .. ! (DH provider?) • > 300 kWh/a.m 2 .. ! SDH - Malmö - April 9, 2013 30 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) SDH - Malmö - April 9, 2013 31 Jan-Olof Dalenbäck