storing thermal energy underground - utes · 2018-09-04 · caverns & pits energy piles deep...

Storing thermal energy underground- UTES -

Dr. Signhild GehlinSwedish Geoenergy Center

ISES Webinar ”Geothermal Underground Storage for Solar Applications” August 30th, 2018

Illustrations: Signhild Gehlin 2014

Shallow and deep geothermal

Soils Rock GroundwaterSurface water

Borehole TES Aquifer TES

Caverns & Pits Energy piles

Deep geothermal






Deep geothermal

Smallerapplications, often singlemode. Passivelystored solar heat.






Deep geothermal

Larger applications for heating and cooling or high temperature BTES. Active storage of solar or waste heat/cold.






Deep geothermal

Large (district) applications for heat (often at high temperature) or cold storage.






Deep geothermal

Use of foundationfor part loadheating and cooling.






Deep geothermal

Deep heat resources for large scale (district) heating or powerproduction. No cooling, solar or storage.

Geothermal energy use Worldwide 2015

Heat Pumps 70%

GeothermalPower 20%

DirectDeep

Geothermal10%Heat pumps

40%GeothermalPower 30%

DirectDeep

geothermal30%

ENERGY TOTAL 237 TWh INSTALLED CAPACITY TOTAL 74 GW

Cooling not included!

Source: WGC 2015 (Lund and Boyd)

Geothermal energy use Worldwide 2015

Heat pumps 40%

GeothermalPower 30%

DirectDeep

geothermal30%

GEOTHERMAL HEAT TOTAL 163 TWh

Cooling not included!


China30%

USA13%

Sweden9%

Europe except

Sweden35%

The rest of the world13%

Top three world geothermal energy countries

Total: 5.6 GW, 14.4 TWhHeat: 0.048 GW, 0.2 TWhGSHP: 5.6 GW, 14.2 TWh

Power: 0 GW, 0 TWh

Total: 20.8 GW, 37.5 TWhHeat: 0.6 GW, 2.5 TWh

GSHP: 16.8 GW, 18.5 TWhPower: 3.4 GW, 16.6 TWh


Total: 19.3 GW, 48.65 TWhHeat: 7.5 GW, 20.6 TWh

GSHP: 11.8 GW, 27, 9 TWhPower: 0.027 GW, 0.15 TWh

Potential for underground thermal energy storage

Source: worldweather.org and climatedata.eu

-20

-15

-10

-5

0

5

10

15

20

25

30

Jan Feb Mar Apr Maj Jun Jul Aug Sep Okt Nov Dec

Ottawa - TL Ottawa - TH

Ottawa

-20

-15

-10

-5

0

5

10

15

20

25

30

Jan Feb Mar Apr Maj Jun Jul Aug Sep Okt Nov Dec

Bogota- TL Bogota - TH

Bogota

1970’s 1980’s 1990’s 2000’s 2010’s

OilCrisisSolar

1970’s 1980’s 1990’s 2000’s 2010’s

ATES in USA, CH,

NL

ATES & BTES

experi-ments in USA, CH, NL, SE, FR, JP

OilCrisisSolar

HT-UTES

1970’s 1980’s 1990’s 2000’s 2010’s

BTES Sunstore & Sunclay

NeuchatelLulevärme

CormontreuilGroeningen

CTES LyckeboAvestaKerava

ATES Hokkaido

TuscaloosaFrösundavik

ATES & BTES


OilCrisisSolar

HT-UTES

H/C UTES

1970’s 1980’s 1990’s 2000’s 2010’s


NeuchatelLulevärme


Road: Därlingen

Solar:Neckarsulm

ATES+BTES Stockton


ATES Hokkaido


ATES & BTES


HT ATES:Utrecht

OilCrisisSolar

HT-UTES

H/C UTES

Hybrid-UTES

1970’s 1980’s 1990’s 2000’s 2010’s


NeuchatelLulevärme


Road: Därlingen

Solar:Anneberg

AttenkirchenCrailsheim

DLSC

Solar:Neckarsulm

ATES+BTES Stockton

LT + Hybrids:Näsbypark

OshawaZhungguancon

Akershus


ATES Hokkaido


ATES & BTES


HT ATES:Utrecht

ATES:Arlanda

OilCrisisSolar

HT-UTES

H/C UTES

Hybrid-UTES

LargeBTES

HT+DH

1970’s 1980’s 1990’s 2000’s 2010’s

ATES & BTES



NeuchatelLulevärme


Road: Därlingen

Solar:Anneberg

AttenkirchenCrailsheim

DLSC

HT:Xylem

BraedstrupLinköping

Solar:Neckarsulm

ATES+BTES Stockton

LT + Hybrids:Näsbypark

OshawaZhungguancon

Akershus

LargeBTES:Epic

TijanjinBSU

ELI-NPSibbo

Grids:NUS

Whisper VRotkreutz

Hönggerberg


ATES Hokkaido


HT ATES:Utrecht

ATES:Arlanda

Underground storage strategies

• Passive systems

• Active systems

• Active systems - balanced

HEATING RESOURCE

COOLING RESOURCE

ENERGY DEMAND

Energy demand

Illustration: Signhild Gehlin 2015

Illustration: Signhild Gehlin 2015

POWER

ENERGY DEMAND

LOCALHEAT SOURCE

POWER

LOCALCOLD SOURCE

UTES is both heat source and cold source

UTES is invisible, quiet and non-smelling.

The underground offers a range of costeffective possibilities to store solar, waste or

other heat or cold over seasons in a non-intrusive and sustainable way.

Both for smaller and larger scale.

UTES is invisible, quiet and non-smelling.

The underground offers a range of costeffective possibilities to store solar, waste or

other heat or cold over seasons in a non-intrusive and sustainable way.

Both for smaller and larger scale.

(If it weren’t, maybe we would have had more of it?)

Thank you!

storing thermal energy underground - utes · 2018-09-04 · caverns & pits energy piles deep...

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