38 slides 0 engine launching conference 12 15022006 kohler

8/2/2019 38 Slides 0 ENGINE Launching Conference 12 15022006 Kohler

1/18

Engine launching conference BRGM - Orleans 13. 16.02.2006

Trigeneration with geothermal energy

Potentials and pitfalls of combined supplywith power, heating, and cooling

S. Khler1, S. Kranz1, A. Saadat1, Felix Ziegler2

1GeoForschungsZentrum Potsdam (GFZ)2Technical University of Berlin (TUB)


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Trigeneration with geothermal energy

Temperature of the heat

source 100 C

250 C

Limited capacity, dependingon temperature and mass

flow rate

Products

Power

Cooling

Heating

Large office buildingsDistrict heating & cooling

systems

Airports

Indoor pools / water parks

Benefits

Improve exploitation

Improve cost-effectiveness

Reduce environmentalimpacts


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Power plantCooling station

Heating station

Subsystems and their Components


4/18

Power plant


> 120 C

power plantT

s

waste heatpower

brine outTb,out


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-

0.05

0.10

0.15

0.20

0.25

0.30

0 50 100 150 200

return temperature of the brine Tbout (C)

effic

iency

100 C

150 C

200 C

Tbrine

-

0.05

0.10

0.15

0.20

0.25

0.30

0 50 100 150 200


effic

iency

100 C

150 C

200 C

Tbrine

-

0.05

0.10

0.15

0.20

0.25

0.30

0 50 100 150 200


effic

iency

100 C

150 C

200 C

Tbrine


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cooling station

waste heatcooling

> 100 C

T

s

Base load

Power plantAbsorption chiller

Peak loadGrid

Compression chiller



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heating station

T

QH

THW,in

THW,outTH1

TH2

heating

Base load

Power plantAbsorption chiller

Heat exchanger

(Heat pump)

Peak loadGrid

Compression chiller

Furnace



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Trigeneration from Fossil Fuel

power

heating

cooling

fuel

flue gas

gas turbine

recoveryboiler

steam

Simultaneous production of useful energies!


9/18

Coupling of the Subsystems

heating station

T

QH

THW,in

THW,outTH1

TH2

heating

cooling station

waste heatcooling

T

s

power plant

T

s

waste heatpower

Serial Not necessarily simultaneous production


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heating station

T

QH

THW,in

THW,outTH1

TH2

heating

cooling station

waste heatcooling

T

s

power plantT

s

waste heatpower

Parallel Subsystems compete


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power plantT

s

waste heatpower

heating station

T

QH

THW,in

THW,outTH1

TH2

heating

cooling station

waste heatcooling

T

s


Seasonal variation


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Simultaneous production!

power plantT

s

waste heat

power

heating station

T

QH

THW,in

THW,outTH1

TH2

heating

cooling station

waste heatcooling

T

s

Efficient Low Temperature Geothermal Binary Power(LOW-BIN)


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Heating and Power

Examples

heating station

T

QH

THW,in

THW,outTH1

TH2

heating

power plantT

s

waste heatpower

Husavik


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Heating and Power

Examples

heating station

T

QH

THW,in

THW,outTH1

TH2

heating

power plant

T

s

waste heatpower

Altheim


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Heating and Power

Examples

Neustadt-Glewe

heating station

T

QH

THW,in

THW,outTH1

TH2

heating

power plantT

s

waste heatpower


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Heating and Power

Husavik

Altheim

Neustadt-Glewe

Examples

Cooling

Alaska Ice Hotel(double lift absorptionchiller)

Trigeneration?


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In search of the Optimum Design

Potential

Geothermal Base load energy

Renewable

Predictable

Trigeneration Power(Tbrine > 120 C)

Cooling (Tbrine > 100 C)

Heating

Challenge

Subsystems compete

Subsystems interact

Distribution of geothermalheat is necessary

Installed capacity (design)

Time (Controls)

Consider changes of massflow rate or temperature ofthe brine

Consider technical andeconomical aspects


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R&D Fields

Supply

ComponentsMaterials

Heat transfer

Turbo machinery

Subsystem Specific design

requirements

Size of the singlecomponents

Part load behaviour

System Design

Measuring and controls

Demand

Geothermal isrestricted to certaintemperature ranges

ArchitectureDistrict heating / cooling

system

Legal issues,administrative aspects

38 slides 0 engine launching conference 12 15022006 kohler

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