4th generation heating system using geothermal energy as ... · the future 0 0.05 0.1 0.15 0.2 0.25...
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4th generation heating system using geothermal energy as the main source
Tor Line, Frode Frafjord, Roar Nysted, Z Energi AS
Peter Breuhaus, Energy Department of International Research Institute of Stavanger
District heating in Norway
Stavanger, Norway «Look to Denmark»
Østre Hageby• 66 residential units
• 6 800 m²
• Low‐temperature heating system
• Lower installation costs due to smaller pipe systems
• Learnt from the Lystrup project in Aarhus, Denmark
Supply: 55 °CReturn: 35 °C
Energy central
Heat pumps
Simple sketch of the energy central
Sketch of Østre Hageby
Measurements• Monitored at Nibe Uplink via an internet connection
• Measured available data are based on standard instrumentation only
• Able to keep track of the compressor work rate
• Electricity consumption and delivered heat are measured
Num
ber o
f compressor starts
Results
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1/5/2015 2/2/2015 7/1/2015 12/31/2015 8/3/2016 10/31/2016 1/1/2017 3/31/2017
Please mind the gap
Heating delivered Heat pumps
• Heat pumps do most of the work
• Electrical boilers sometimes necessary to compensate for the peak demand
• Gaps are explained by adjustment issues
Results of 2017
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01.01.2017 ‐ 31.03.2017
El. Boiler
Heat pumps
Energy consumption
Total = 194 620 kWh
Heat pump = 170 588 kWh
Electric boiler = 24 033 kWh
61 % reduction in energy, when compared to an all‐electricity based solution
Conclusion• First 4th gen. in Norway
• Operating reliably for 2.5 years
• 40 % lower energy consumption pr. m²
• Greener choice than all‐electric solutions
• Downside is lack of more exact measurements
The future
www.Racell.dk
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EUR/kWh
VAT
Taxes and levies other than VAT
Basic price (without taxes andlevies)
Excerpt from Eurostat, 2nd half of 2016
• Norwegian electricity prices amongst the lowest in Europe, but are expected to increase (hopefully!)
• Planning energy solutions for the future's retirement homes
• Combining:4th and 5th gen. district heatingGeothermal energyImproved heat recovery systemsHybrid solar panels (PV‐T)New hybrid legionella preventing technology
