Seasonal Heat Storage ambasados...2015/09/29 · • Sunstore 3, 69 000 m³ 2013 • Vojens, 195...
Transcript of Seasonal Heat Storage ambasados...2015/09/29 · • Sunstore 3, 69 000 m³ 2013 • Vojens, 195...
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Wednesday, September 30, 2015
Construction of a Heat Storage
- short history
- economy of
Photos with courtesy of Dronninglund Fjernvarme amba Denmark, Johan Freylund
Presented by Per Ken Åberg
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History of heat storage in Denmark
• Developed since 1980….
• Different techniques used, steel tanks, groundwater (Aquifer), bored holes, concrete tanks.
• One of the most effecient are PTES; Pit Thermal Heat Storage
• Comes originally out of goverment spend for re-newable energy development
• Gram and Vojens are commercially self bearing as per 2014-15
Existing GSE heat storages
• Sunstore 4, 75 000 m³ 2012
• Sunstore 3, 69 000 m³ 2013
• Vojens, 195 000 m³ 2015
• Gram, 122 000 m³ 2015
Gram, Sept. 2014
GSE
HT HD
GSE Basis
Protect
Vojens, April 2015
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Alternatives in design and future progress since 2012
• Liner development
• Insulation
• Filling with water
• After care
• Leak control
• Floating liner installment options
• Known issues after heating
• State of the art at 2015 is with GSE
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Costs for Danish Market:
Conventional tech cost; insulated steel
tanks + 150€ per m³ 2105
Cost for same storage function PTES
• at Sunstore 4 39€ per m³ 2012
• at Sunstore 3 25€ per m³ 2013
• at Vojens 21€ per m³ 2015
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FOUNDATION
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Location an old gravel pit, Dronninglund, in Denmark April 2013
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Foundation for the diffusor pipes, April 17
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Laying the pipes to the diffusor April 25
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Installing the diffusor May 2
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INSTALLING THE GSE HIGH
TEMPERATURE LINERS
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Installing the Heat Resistant Liner and Protective Geotextile May 21
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Diffusor Connection May 23
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Closing up baseliner installation June 3, 2013
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Seam tightness installation test June 3
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Locking trench photo and the finished base of the heat storage June 12, 2013.
(dig start April 11)
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QUALITY ASSURANCE
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Baseliner are tested for tightness June 12-15
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Center for softening of the water established June 14
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Flow area and tank overflows
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New buffer tank of 30 cubic meters installed, July 24, now it works….
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Enjoying the filling process, summer 2013
August 5, 2013
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Cheers! We made it, and walk on water…. August 12, 2013
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THE GSE FLOATING COVER
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Time to start installing the floating cover… August 19, 2013 VIDEO
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Float liner installation continues August 20
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Walk on the…. 2 mm High Temperature Resistant Liner, Aug 20 VIDEO
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Weight pipe work in progress September 16
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Weight pipes in position and weighed down, Sept, 19
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INSULATION & UPPER LINER
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Start of insulation Sept 17
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The upper High Performance Grey 1,5 mm Liner installs, September 20
VIDEO
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Drainage sections for lid are constructed October 2, 2013
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Cut up for hole to drain bottom liner, vacuum test of extrusion welds, Oct, 22
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Fence are up and fastening vacuum vents are installed Oct 30, 2013
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Upper weight pipes to direct free water to low area, laid out November 14
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FINISHED STORAGE
MARCH 15 TO NOV 11, 2013
VOLUME 69 000 M³
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Functional facts
• Effect: 27 MW (up to 50 % of consumers use)
• Design temp: 90 C / 6 C
• Sun collector area: 37 500 sqm
• Flow in collectors: 2 x 300 cubicmeters per hour
• Storage dimensions: 91 x 91 meters, depth 16 meters
• Insulation thickness: 240 mm
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Finished construction Nov, 19, 2013
Photo from 2014, Dec, 3,
below
Photo Nov, 19, 2013
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Per Ken Åberg Wednesday, September 30, 2015
Questions…?
MERCI!