Archivio Istituzionale della RicercaWe report on an experimental field trial of optical sensing for monitoring a geothermal energy harvesting solution installed in the tunnel lining of the Turin metro line 1 South extension, currently under construction. Fibre Bragg Grating sensors for temperature and strain are embedded into a concrete ring of the tunnel that also hosts the pipes connected to a heat pump. The readings from the optical sensors are remotely recorded and compared with measurements performed with conventional electrical sensors. The comparison shows a good agreement between the two monitoring technologies and highlights a non-negligible sensitivity to the environmental temperature. This sensitivity and any further information of strain and temperature of the energy rings will be considered for further optimization of the energy-harvesting process.
Fibre Bragg Gratings Monitoring in a Pilot Project of an Energy Tunnel / Olivero, M.; Insana, A.; Vallan, A.; Gaudino, R.; Barla, M.; Perrone, G.. - ELETTRONICO. - (2018), pp. 40-43. (Intervento presentato al convegno 20th Italian National Conference on Photonic Technologies (Fotonica 2018) tenutosi a Lecce nel May, 23-25, 2018) [10.1049/cp.2018.1649].
Fibre Bragg Gratings Monitoring in a Pilot Project of an Energy Tunnel
Olivero, M.;Insana, A.;Vallan, A.;Gaudino, R.;Barla, M.;Perrone, G.
2018
Abstract
We report on an experimental field trial of optical sensing for monitoring a geothermal energy harvesting solution installed in the tunnel lining of the Turin metro line 1 South extension, currently under construction. Fibre Bragg Grating sensors for temperature and strain are embedded into a concrete ring of the tunnel that also hosts the pipes connected to a heat pump. The readings from the optical sensors are remotely recorded and compared with measurements performed with conventional electrical sensors. The comparison shows a good agreement between the two monitoring technologies and highlights a non-negligible sensitivity to the environmental temperature. This sensitivity and any further information of strain and temperature of the energy rings will be considered for further optimization of the energy-harvesting process.
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https://hdl.handle.net/11583/2733773
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