Heat Pump Energy Storage System Varmepumpe Energilagring fileThermal energy storage technologies Presenter: Researcher Erasmus Rothuizen Section of Thermal Energy Technical University

Community Power and Renewable Energy Storage in Denmark and in the EU Community power og vedvarende energi lagring i Danmark

og i EU Nordisk Folkecenter for Vedvarende Energi, 7760 Hurup, Denmark, 12.12.2016

The event is supported by Europa Nævnet/Arrangementet er støttet af

Heat Pump Energy Storage System Varmepumpe Energilagring

Erasmus Damgaard Rothuizen, DTU, Denmark

Thermal energy storage technologies

Presenter:

Researcher Erasmus Rothuizen

Section of Thermal Energy

Technical University of Denmark

Email: [email protected]

Thermal energy storage technologies

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Agenda

The Danish energy system

PTES and CAES

Introduction Thermal storage technologies

Conclusion

TEST

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Danish Energy System

• High share of combined heat and power

• Wind share 7 % of energy consumption 41,8 % of electricity

• Total share of renewables 28,6 %of energy consumption

• Fluctuating wind power and PV are challenges to power grid and plant control

• Demand-responding consumers are needed

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Danish Energy System

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Danish Energy System

0,0

1000,0

2000,0

3000,0

4000,0

5000,0

6000,0

0 1000 2000 3000 4000 5000 6000 7000 8000 9000

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h

Hours

DK-West: Brutto production DK-West: Gross consumption

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63

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29

29

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32

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34

78

36

61

38

44

40

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93

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76

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21

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04

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87

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19

86

02

DK

K/M

Wh

Hours

Danish Energy System

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Thermal storage technologies

• ISEC

– Electricity to hot water up to app. 90 C

• TEES/HPES

– Electricity

• Thermal storage for district heating from CHP’s and solar panels

– water up to 110 C

• High temperature latent aluminum storage for power plants

– Heat at app. 700 C (In research phase)

– Electricity

• CAES

– Electricity

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Thermal storage technologies

• ISEC

– Electricity to hot water up to app. 90 C

• TEES/HPES

– Electricity

• Thermal storage for district heating from CHP’s and solar panels

– water up to 110 C

• High temperature latent aluminum storage for power plants

– Heat at app. 700 C (In research phase)

– Electricity

• CAES

– Electricity

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Pumped themal energy storage concept

• Transcritical or Zeotropic refrigerant

– CO2

• Low temperature thermal storage 140 C

• Intermediate storage

– Less temperature lift per gas cooler

– Matching temperature glides

• Increase of efficiency

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Compressed air energy storage concept

• Reversible CAES

– No energy losses

• Adiabatic

– No heat loss

• Conventional

– Added fuel and gas turbine

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An Integrated PTES System

Gram: www.gram-fjernvarme.dk/index.php/solvarme-anlaegget-i-tal

Vind: www.danskenergi.dk/Aktuelt/Arkiv/2015/Oktober/15_10_09A.aspx

Mejeri: www.mariahedegaard.dk/fotoserie-fra-et-dogn-i-danmark/tapning-af-maelk-pa-christiansfeld-mejeri/

Hus: https://www.colourbox.dk/vektor/illustration-af-organisk-groenne-hus-vektor-1984187

On demand: https://str.llnl.gov/AprMay11/meike.html

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An integrated CAES

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Efficiency PTES

1 MWh electricity

4 MWh heat 1 MWh electricity

Heat pump COP 4

Expander

Efficincy 0.25

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Efficiency PTES

1 MWh electricity

3.2 MWh heat 0.5 MWh electricity

0.1 MWh electricity

Heat pump COP: 3.2

Expander

Efficincy 0.15

2.7 MWh heat

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Efficiency Conventional CAES

0.7 MWh heat 3 MWh electricity

0.3 MWh electricity

Fuel (NG or BG)

3.6 MWh

1.3 MWh

1 MWh electricity

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Comparaison of PTES and CAES

PTES

CAES

Reversible: 1

Optimized: 0.6

One stage: 0.5

1 Unit

Reversible: 1

Adiabatic: 0.7

Conventional: 0.4

1 Unit

Battery: 0.95

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Prove of concepts

CAES

• Huntorf CAES

– More than 20 years of operation

• Location

– Geographical decided

PTES

• Yet to be proven

• ABB

– Expander problems

– Still need demonstration

– Patents

• Location

– Where needed

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Summary

• Bulk electricity storage is needed in the future and will involve

– Large investments

– Significant losses du to irreversibilities

– Large volume and/or area

– Large price fluctuations or high consumer prices to be feasible

• Several ideas and concept are investigated

– Long term storage

– PTES

• Independent of location

• Multipurpose integration

• Still to be proven

– CAES

• Proven concept

• Dependent on location

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Thank you for your attention

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PTES extra slides

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PTES extra slides