industrial waste heat recovery, technologies and examples · zae bayern, richard gurtner page 19...
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Facilitator
www.german-energy-solutions.de
Richard Gurtner,
ZAE Bayern,
09.10.2018,
Riga
Industrial waste heat recovery, technologies and examples
From basic research to full-size demonstrators
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ZAE Bayern – Applied Energy Research for the Energy
Economy
ZAE fills the gap between
basic research and
commercialisation of new
ideas
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Ways of Waste Heat Utilization
Waste Heat
Direct Use Storage Transformation
Sensible ChemicalLatent
Into ElectricityThermal
Chiller Heat Pump ORC Thermo-ElectricEffect
Sterling-Engine
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Thermal Driven Heat Pumps/Chillers
Ambient
Cooling Demand
Chiller Heat Pump
Sink
Source
Sink
120°C
Source
Waste
Heat/Auxiliary
Power
Temperature
90°C
15°C
6°C/<0°C
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Thermal Energy Storage
Sensible
Chemical
Latent
0°C 100°C 500°C300°C
Zeolite
Water storage
Waterpressurized
Ruth storage
Thermal oil/Solid materials/Salt hydrates
Regenerators
State of the art Demonstration R&D
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Determination of Waste Heat Utilization Potentials
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• shift in time and location possible -> additional customers
• flexible energy transport where pipelines are not cost effective
• high storage capacity and thermal power by sorption technology
Mobile Thermal Energy Storage for Waste Incineration
Plant
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• charging station
Mobile Thermal Energy Storage for
Waste Incineration Plant
zeolite
AMB
waste heat(steam)150 °C
Tout = 45 - 50 °Crel. hum. = 85 - 95 %
30 °C
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• discharging station
Mobile Thermal Energy Storage for
Waste Incineration Plant
zeolite
dryer
zeolite
AMBOUTIN
ADS
auxiliaryheating
feed
Tout = 185 °Crel. hum. < 3 %
Tin = 58 °Crel. hum. = 64 %
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Waste heat recovery today
High Temperature Storage in a Foundry
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Waste heat recovery tomorrow
High Temperature Storage in a Foundry
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Dual-Media thermal storage
High Temperature Storage in a FoundrySensible thermal energy storage up to 220°C
• Replacing oil by cheap solid
material (e.g. rock) reduces costs
• Direct thermal contact between
solid material and HTO enables
good heat transfer
• Storage capacity can be increased
by using suitable solid material
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High Temperature Storage in a FoundrySensible thermal energy storage up to 220°C
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• R&D phase successfully completed
• Demonstration plant planned for 2019
High Temperature Storage in a FoundrySensible thermal energy storage up to 220°C
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Standard CHP-Unit in combination with a Single-Effect chiller
• state of the art
• decentral placement of CHP-Unit and chiller possible
• low efficiency and unflexible chiller process
CHP-Unit combined with an Absorption Chiller
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Adapted CHP-Unit in combination with an Double/Single-Effect chiller
• direct use of flue gas by the double effect chiller and simultaneous use of hot water by the single
stage increases the efficiency
• flexible supply with heating and cooling energy increases runtime of CHP-Unit
• CHP-Unit and chiller are more complex and no decentral placement possible
CHP-Unit combined with an Absorption Chiller
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• industrial area with hot and chilled water network in southern Germany
• hot water demand: 7500 MWh annual / 3 MW peak
• chilled water demand: 4000 MWh annual / 1.5 MW peak
CHP-Unit combined with an Absorption ChillerDemonstration Plant – Key Figures
CHP-Unit
Absorption-Chiller (DE/SE)
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• 3,7 MWh of cooling
demand could be covered
• Double/Single effect
concept can deliver 64%
more cooling energy
CHP-Unit combined with an Absorption ChillerDemonstration Plant – Results
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• Knowledge about waste heat situation and potentials
• Knowledge about technologies (costumer, planner)
• To get knowledge is costly without direct cost advantage
• High investment costs for waste heat recovery systems
• Investment is economic but payback time expectations often not realistic
• Suitable financing models are rare
• Main goal is production not energy efficiency
Obstacles and Challenges
09.10.2018
www.german-energy-solutions.de
Thank you for your attention!
ZAE Bayern, Richard Gurtner Page 2009.10.2018