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General information |
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Name |
Colas Yverdon-les-Bains
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Country installed |
Switzerland
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Address |
Rue des Petits Champs, 1400 Yverdon-les-Bains
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Industry sector, NACE code |
F - Construction
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Solar thermal system owner / operator |
Colas Suisse SA
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Solar thermal engineering company |
SRB Energy
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Process integration engineering company |
MRI
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Year of operation start |
2014
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Technical parameters |
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Collector technology |
other or various collectors
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Collector name |
SRB type c2
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Installed collector area (gross), m² |
197.0
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Installed collector area (aperture), m² |
173.0
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Installed collector area (absorber), m² |
123.0
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Installed thermal power (actual), kWth |
96.0
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Solar collector loop heat transfer fluid |
thermo-oil
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Solar energy storage |
other
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Storage volume, m³ |
90
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Kind of conventional heat source |
other
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Kind of fuel used |
natural gas
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Process |
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Solar thermal energy used for |
Maintainging bitument into temperature>160°C and for building needs (Space heat + DHW)
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Unit operation |
melting
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Point of Solar Heat Integration |
B3) Heating of process heat storage
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--> Integration how and where |
Solar heat can be delivered either into a water storage to supply an administrative building needs or into a bitumen tank that needs to be maintained into temperature above 160°C (bitumen melting point)
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--> Temperature range process |
50-90°C/160-200°C
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--> Temperature range solar loop (min/max), C° |
50/300
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Economic parameters |
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Total investment costs (excl. VAT), € |
300,000.00
(Turnkey costs including solar collectors, piping, support construction, storage, design, commissioning reduced with subsidies)
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Solar loop (excl. VAT), € |
(Solar collectors, piping, support construction)
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Solar energy storage (excl. VAT), € |
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Others (excl. VAT), € |
(Design, commissioning, others)
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Process integration (excl. VAT), € |
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Subsidy, € or % of total investment costs |
no subsidies
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Cost for fuel replaced, €/MWhfuel |
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Calculated solar thermal system life time, a |
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Annual useful solar heat delivery, MWh/a |
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Specific annual useful solar heat delivery, MWh/am² |
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Specific investment costs, €/m² |
1522.84
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Solar fraction, % |
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Lessons learned |
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Initiative |
COLAS Suisse SA, member of COLAS group, the worldwide leader in the bitumen and road coatings sector, has decided to equip one of its regional sites with a solar thermal installation for temperatures up to 200°C. The principal objective of this project was to reduce the industrial site fossil energy consumption by 60%.
During 2013, a R&D project funded by the Swiss Federal Office of Energy was started aiming to analyze
and optimize the thermo-economic and environmental performance of this installation, but also to evaluate the performance of energy storage in bitumen
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Integration methodology |
Coupled with a gas boiler, the solar collectors were installed with the dual purpose of meeting the thermal energy needs of a workshop building and to maintain two bitumen storage tanks above its melting point.
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Crucial Interfaces |
The control of the system seems very difficult to establish (is it better to store solar energy into bitumen when available and then transfer it to the water storage or not?, etc.)
Several components (heat exchangers, heat pipes, etc) are used by both of the heat sources (solar and gas boiler) and it is not ideal because they don't have the same temperature levels, mass flow or supplied thermal power.
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Construction / Commissioning |
The storage tanks were existing and the whole installation had to be adapted to them.
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Operation / Performance |
Measurements are ongoing
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Recommendations |
Keep separated hydraulic circuits for solar and other heat source.
Attention should be paid to the exergetic losses of the system.
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Source |
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Author |
Mircea Bunea
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Company of author |
HEIG- VD - LESBAT
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E-mail |
mircea.bunea@heig-vd.ch
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Phone |
+41(0)245572817
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Homepage |
www.lesbat.ch
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