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ENERGY HARVESTER EXPLOITING SEEBECK EFFECT IN TRADITIONAL DOMESTIC BOILER. S.Barberis, L. Di Fresco, V.A. Santamaria, A. Traverso Speaker : Alessandra Cuneo. University of Genoa, Italy Dipartimento di Ingegneria Meccanica - DIME. Nice, 1 – 3 October 2014. 1. How to Give Value to Waste Heat. - PowerPoint PPT Presentation
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University of Genoa, ItalyDipartimento di Ingegneria Meccanica - DIME
S.Barberis, L. Di Fresco, V.A. Santamaria, A. Traverso
Speaker: Alessandra Cuneo
ENERGY HARVESTER EXPLOITING SEEBECK EFFECT IN TRADITIONAL
DOMESTIC BOILER
Nice, 1 – 3 October 2014
How to Give Value to Waste Heat
Autonomy and Energy Everywhere
Energy Harvesting
Energy Efficiency
Autonomy for Remote Sensor Metering and
Control- 3000 Alpine
Hut in Italy
- 2 Mln of Trekkers in
Europe
Energy harvesting and TEG TechnologySure and Solid Technology
Modular and ScalableCheap, no maintenance, exploitable everywhere
Low Efficiency (0,6-3%), but able to exploit low ΔT
What is qb_HOT?
PV
Little Solar Concentrator
Conductive patch
Control Electronics
Heat Sink
4 TEG cells
8 cm 8 cm
8 cm
qb_HOT
Possible Integration
On the Market Components
USB Charger
What is belt_HOT?
belt_HOT
Traditional fossil and biomass boiler
Energy Autonomy for Remote Metering sensors in pipelines
etc.
Modular Version
What is qb_HOT producibility?
Conductive patch
Control Electronics
Heat Sink
4 TEG cells
8 cm 8 cm
8 cm
qb_HOT
Producibility is based on the thermal gradient exploitable in each situation and on the cold side temperature
ΔTteg = 0.8742 (Th – Tc)
qb_HOT mobile charger belt_HOT energy
harvester
How Much does qb_HOT cost?
8 cm
8 cm
8 cm
Thermal Patch 2€ +Heat Sink 2-3€ +4 TEG cells 20 € +Step Up DC/DC 6 € +_____________________
TOTAL = 30 €
On the Market Components
Peltier Cells cost 80% less than TEG, similar technology, larger market today
Price to the user: 50 – 60 €
belt_HOT
Depending on the number of TEG cells150 – 250 €
From 8-12,5 €/W to 4-6 €/W
belt_HOT Exploitation Scenario
Detached House(20 kWt Gas Boiler)
3000 kWh/year
belt_HOT configuration 6 belt made by 24 cells
Total Pmax installed 1 kW
Power Output with ΔT = 80°C 100-150 W
Total Year Energy Saving 200 kWh – 40 €
- Auxiliaries Autonomy- Smart Docking Station- LED Lighting in the
Garden
belt_HOT Exploitation Scenario
Condo(500 kWt Gas Boiler)
6000 kWh/year
belt_HOT configuration 5-10 belt made by 120 TEG cells
Total Pmax installed 4,2 – 8,4 kW
Power Output with ΔT = 80°C 600 W -1,2 kW
Total Year Energy Saving 1000 - 2000 kWh – 200 - 400 €
- Common Parts Lightning- Energy Bill Cuts 20%
belt_HOT Exploitation Scenario
Alpine Hut(20 kWt Biomass Boiler)
Higher Thermal Gradient(120 – 160°C)
- LED Lightning- Charging Plug In- Coupling with other
typically RES generators present in a Hut (PV, mini wind…) and batteries
belt_HOT configuration 4 belt made by 36 TEG cells
Total Pmax installed 1 kW
Power Output with ΔT = 180°C 200-250 W
Conclusion
qb_HOT belt_HOT
- The TEG is a heat recovery generator, even if it has a low efficiency (efficiency between 0,6 % to 3%) it can be easily incorporated in the structure of the heat source, producing whenever the boiler is on and guaranteeing a continuous and autonomous production as the maintenance is very light
- Designing the TEG, a strong attention to the heat dissipation at the cold side
- TEGs work with significant thermal gradient (70-100°C), so this technology can’t be coupled with more efficient heating system like condensing boiler
- Prices of the Harvesters are nowadays quite high, but they can reduce their costs looking at current TEC technology costs and thanks to size effect.
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University of Genoa, ItalyDipartimento di Ingegneria Meccanica - DIME
Thank you for your time
[email protected]@edu.unige.it
www.tpg.unige.it
