Geothermal experience, district heating and snow melting system … · • Types of turbines: Back...


• Verkís is a new company founded in 2008 by the merger of five leading Icelandic consulting engineering firms

• Long history, originally dated back to 1932

• Turnover 2010: 25 m USD

• Staff of 300

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Our knowledge and experience

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What Verkís can contribute in:

• Hydro Power Plants and Dams

• Harnessing glacier rivers

• Geothermal Power Plants

• Substation and Transmission

• Geothermal District Heating Systems

• Energy savings and System losses


Geothermal utilization

200 °C

Electricity

Space heating

Industry

Farming

Balneologie

Adapted from Lindal diagram

100 30

Flash Cycle

Kalina Cycle

150 50

Organic Rankine Cycle

Drying

Refrigeration

Radiators

Floor heat

Snow-melt

Multi effect evaporation

Soil warming

Fish farm

Mushroom

Animal husb.

Pools


Geothermal Power Plants

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Hellisheiði Geothermal Power Plant

Svartsengi Geothermal Power Plant

Continuous experience for decades:

• First Power Plant in 1975

• 35 units, total 800 MW

• Types of turbines:

Back pressure

Condenser

Binary ORC

Binary Kalina

• 13 new units last 10 years, total 500 MW

• 3 refurbishment projects, total 63 MW


Historic overview of Geothermal Power Plants

Our experience in GPP


Geothermal District Heating experience

Consulting, feasibility study and designing of geothermal district heating systems since 1962:

• Total 1350 MWt in Iceland and 950 MWt abroad

• Temperature ranging from 60 to 130 degrees Celsius


Geothermal District Heating in Iceland

• Reykjavík: 900 MWt

• Hitaveita Suðurnesja: 150 MWt

• Akureyri: 80 MWt

• Hveragerði: 65 MWt

• Húsavík : 11 MWt

• Stykkishólmur 5 MWt


Geothermal District Heating Worldwide

• Xianyang, China 430 MW

• Beijing, China 24 MW

• Galanta – Slovakia 13 MW

• Budapest, Hungary Preliminary study

• Denizli, Turkey Preliminary study


Reykjavik Energy

• In operation since 1943 (1930).

• Population of the service area: 200.000

• Power 900 MW geothermal + 90 MW oil fired boiler (last time used 1990).

• Annual quantitiy delivered to the consumers: 80 million m3 of 70° - 80°C water.

• Maximum flowrate 18.000 m3/hour

• Price: 0,65 €/m3 - 1,45 € cent pr. kWh


Reykjavík, Iceland, 60 years ago


Reykjavík today


Hafnarfjördur

Storage tanks

Geothermal field

Distribution area

Cold water supply

Nesjavellir

350 MWth, 120 MWel

Grámelur

Garðabær

Reykir, 85°C

Reykjahlíð, 90°C

Reykjavik, 130°C

Reykjavik District heating


Reykir and Reykjahlíð

Temp: 65-100 °C

Capacity : 1700 l/s

No of exploitation wells : 34

Prior to exploitation artesian flow: 120 l/s Area: 5.5 km2


Laugarnes

– Area: 0.28 km2

– Temp: 125-130 °C

– Capacity : 330 l/s

– No of exploit. wells : 10


Laugarnes drillhole and pumping station


R E Y K I R G e o t h e r m a l f i e l d

1 7 0 0 k g / s

D e e p w e l l p u m p s

8 5 - 9 0 ° C

D e a e r a t o r

P u m p i n g s t a t i o n

S t o r a g e t a n k s

O i l f i r e d p e a k p o w e r s t a t i o n 1 0 0 M W t

9 0 ° C 9 0 ° C M i x i n g

8 0 ° C

8 0 ° C

3 5 ° C

S n o w m e l t i n g

D r a i n

H e a t i n g

H e a t i n g

3 5 ° C

E L L I D A Á R

G e o t h e r m a l f i e l d 2 2 0 k g / s

L A U G A R N E S

G e o t h e r m a l f i e l d 3 3 0 k g / s

H e a t i n g

H e a t i n g

8 0 ° C 3 5 ° C 1 2 7 ° C 1 2 7 ° C

D r a i n

D r a i n

D r a i n

D r a i n

8 0 ° C 3 5 ° C

8 3 ° C

C o l d w a t e r w e l l s

G e o t h e r m a l w e l l s

2 0 0 M W t

N E S J A V E L L I R

Simplified flow diagram


Pipes laid in trenches in tarmac


Result – Snow melting


Snow melting system withoutdistribution boxes


Result – Snow melting


Landmannalaugar

Thank you

Geothermal experience, district heating and snow melting system … · • Types of turbines: Back...

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