geothermal energy in norway and hordaland · 2017. 6. 11. · geothermal boreholes flatice energy...
TRANSCRIPT
Geothermal Energy in Norway and Hordaland
Kirsti Midttømme, Senior Scientist
INSTALLED CAPACITY FOR
GEOTHERMAL ELECTRICITY
AND DISTRICT HEATING
IN 2016 (MW)EGEC Geothermal
Market Report 2016
Heat flow map, Europe
Ref: Atlas of Geothermal Resources in Europe, 2002
Heat flow densitymW/m2
>150
80-150
50-80
30-50
<30
Geological map Europe
Norway is located on the
Fennoscandian Shield.
• The porosity of the crystalline
bedrock is low
• The lithosphere is cool and thick
and characterized by a low heat
flow density that is below the
continental average (Kukkonen, 2002).
Ground Temperatures Bergen ?
Maystrenko et al. 2015
Mesured temperaturesin boreholes
Mayasa Rashed UiB, 2013
Haukeland Hospital
Åsane
Osterøy
Geothermal heat pump
Annfield Plain, Co. Durham
CGround source in
Ground source return
Space heating
Evaporator(heatexchanger)
Condenser(heat exchanger)
Compressor
Expansionvalve
11°C
6°C
40°C
Heat PumpElectricenergy IN
Underground Thermal Energy Storage UTES
with boreholes (BTES)
Cooling
Heat pump
Heating
40 mm single
U tubes with
anti freeze
brine
Heat pump
Geothermal heat pump installations, Arcus, Oslo 90 BHE 300m
Ref: Båsum Boring
Geothermal heat and power –
renewableenergy
Geothermal heat pump system –energy
efficiency
Negawatt – the most environmentally friendly
energy is the energy not used
19
84
4 apartmenthouses Varden12BHE x 160m 2
09
2010
Spar Kjøp Kokstad 18BHE x 170m
Olav Grevstad AS 6BHE x 190m
2010
Chr M Vestreheim7BHE x 170m
2010 2012
Espehaugen 45 6BHE x 200m
University College Bergen
80 BHE x 220m
2012 2013
HaukelandHospital
75BHE x 250m
2003
Apeltun school10BHE
2001
Ahlsell Åsane 6BHE x 160m
Sælenveien 91 18BHE x 170m
2012
2010
Clampon5 BHE x 180m
Kleppestø school
19 BHE x 180m
2011
Kolstien 11BHE x 200m
2012
Sartor mall165 BHEx 200m
2013
COOP Åsane 112 BHE x 212m
2013
Ådnamarka school
14BHE x 190 m
2009
Scandic Flesland Hotel
50 BHE x200 m
2016
Foto: Tord Erik Andresen
Monitoring by distributed fiber optictemperature sensing (DTS)
16
Western Norway University of Applied Sciences
Campus Kronstad In operation from 2014 Gross area: 51 000 m2
17
PCM for short term thermal storage
4 tanks á 64 m3 containing 12 700 Flat-ice elements
Salt hydrate solution S10
Water temperatures 7/17 °C
Cooling capacity of 11 200 kWh
18
Energy system overview
Heat pump
Building heating system
Building cooling system
Geothermal boreholes
FlatICEEnergy storage
District heating system
temperature and flow probe
300 kW versus 700 kW
81 versus 160
Condenser/cooling tower
• Energy system combining BHE and PCM
• Cooling machines, 1 400 kW
• PCM day-storage11 200 kWh = 7 hours á 1600 kW
• 81 boreholes á 220m
• Geothermal heat capacity ca. 1 700 kW
• Heating and cooling operating modes
• Energy recovered to boreholesca. 1 200 000 kWh
• District heating only used for peak heating load
No need for condensers or cooling towers
19
Power requirement cooling
Cooling requirements estimated to about 3 000 kW
Fordeling av kjølebehov over dimensjonerende døgn.
0
500
1 000
1 500
2 000
2 500
3 000
0 –
1
1 –
2
2 –
3
3 –
4
4 –
5
5 –
6
6 –
7
7 –
8
8 –
9
9 –
10
10 –
11
11 –
12
12 –
13
13 –
14
14 –
15
15 –
16
16 –
17
17 –
18
18 –
19
19 –
20
20 –
21
21 –
22
22 –
23
23 –
0
kW
Teknisk kjøling Kjølebafler 14°C/60% 14°C/75% gjv 16°C/75% 16°C/55%
20
Power requirement reductionsFordeling av kjølebehov over dimensjonerende døgn. Reel. Smeltetemperatur 10°C
0
500
1 000
1 500
2 000
2 500
3 000
0 –
1
1 –
2
2 –
3
3 –
4
4 –
5
5 –
6
6 –
7
7 –
8
8 –
9
9 –
10
10 –
11
11 –
12
12 –
13
13 –
14
14 –
15
15 –
16
16 –
17
17 –
18
18 –
19
19 –
20
20 –
21
21 –
22
22 –
23
23 –
0
kW
Teknisk kjøling Kjølebafler 14°C/60% 14°C/75% gjv 16°C/75% 16°C/55% Til lager Kuldeproduksjon
Storage capacity of 11 200 kWh About 50% reduction of peak load
International collaboration
21
Collaboration with Polish Geological Institute
A blanket of pollution wreathed Warsaw, above, and dozens of other Polish cities, bringing a global problem more associated with Beijing into the heart of Europe.January 2017
CreditMateuszWlodarczyk/NurPhoto, via Getty Images
Conclusions
• Geothermal heat pump technologies are commercial but not proven technologies
• Nordic consultancies and scientist are considered as experts in design and developing of large geothermal heat pump systems
• There are a need for skilled and innovative scientists for design of the future geothermal energy systems
Thanks for the attention !