Study for optimizing the daylight “filter” in a pre-tunnel structure

Drakou, Dionysia; Celucci, Lucia; Burattini, Chiara; Nardecchia, Fabio; Gugliermetti, Franco

doi:10.1109/eeeic.2016.7555557

Cited by 16 publications

(4 citation statements)

References 4 publications

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“…Among the solutions proposed and implemented for this purpose, we can find semi-transparent structures (Abdul Salam and Mezher, 2014;Peña-García et al, 2010Gil-Martín et al, 2011, Peña-García, 2019; pergolas with empty space between beams (Peña-García and Gil-Martín, 2013) or using diffusive materials to avoid flicker effect on the road (Gil-Martín et al, 2015;Peña-García et al, 2016a); and structures with different patterns of holes (García Garay et al, 2012;Drakou et al, 2015Drakou et al, , 2016Drakou et al, ,2017Cantisani et al, 2018b;Cantisani et al, 2018c). A. Peña-García and J. Cabeza-Lainez 2) Transfer of sunlight inside the tunnel: this solution does not require threshold displacement, but just the installation to collect and distribute the solar luminous flux inside the tunnel.…”

Section: Strategies To Decrease the Impact Of The Lighting Installati...mentioning

confidence: 99%

Daylighting of road tunnels through external ground-based light-pipes and complex reflective geometry

Peña-García

Lainez

2023

Tunnelling and Underground Space Technology

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Section: Strategies To Decrease the Impact Of The Lighting Installati...mentioning

confidence: 99%

Daylighting of road tunnels through external ground-based light-pipes and complex reflective geometry

Peña-García

Lainez

2023

Tunnelling and Underground Space Technology

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“…In recent years, research groups around the world have focused their efforts on the development of strategies to introduce natural light inside the tunnels [31][32][33], or to shift the threshold zone, which is the most consuming part, out of the tunnel, using a part of the sunlight, properly filtered and attenuated [34][35][36][37][38][39]. The most promising strategy in this last case is the use of pre-tunnel pergolas, whose construction before the portal gate can yield energy savings in the threshold zone of about 40% [35].…”

Section: Lighting Infrastructures: Use Of Sunlight In Road Tunnelsmentioning

confidence: 99%

Proposal to Foster Sustainability through Circular Economy-Based Engineering: A Profitable Chain from Waste Management to Tunnel Lighting

et al. 2017

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Abstract:The increasing demands of infrastructures in terms of energy consumption, raw material demand, greenhouse gas emissions, waste management, treatment of components after their lifetime period, and financial costs are nowadays a serious threat for sustainability. Given that the resources are limited, it is difficult to ensure an accurate level of well-being for future generations. For this reason, new perspectives in design, production and consumption are necessary. In this work, the principles of circular economy are applied to concrete branches of engineering. Departing from a design orientated to new uses after life period of infrastructures, a circular economy-aimed engineering makes possible the connection and mutual profit of such different branches like waste management and tunnel lighting. The benefits in environmental and financial terms are a strong argument in favor of a stronger link between engineering and circular economy.

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“…As energy consumption has become a crucial factor for tunnel design, a number of control systems based on daylight compensation have been investigated for installation in the tunnel entrances [44][45][46][47].…”

Section: Introductionmentioning

confidence: 99%

Revision of Threshold Luminance Levels in Tunnels Aiming to Minimize Energy Consumption at No Cost: Methodology and Case Studies

Doulos

Sioutis²,

Tsangrassoulis

et al. 2020

Energies

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Because of the absence of lighting calculation tools at the initial stage of tunnel design, the lighting systems are usually over-dimensioned, leading to over illumination and increased energy consumption. For this reason, a fine-tuning method for switching lighting stages according to the traffic weighted L20 luminance is proposed at no additional cost. The method was applied in a real –case scenario, where L20 luminance of the access zone at eleven (11) existing tunnels was calculated. The traffic weighted method of CR14380 was used in order to calculate the actual luminance levels for the entrance zone. The new transition zone, which decreases luminance curves, was produced and compared with the existing ones. Thus, a new switching control was proposed and programed for the Supervisory Control and Data Acquisition (SCADA) system of the tunnel. The signals of the corresponding eleven L20 meters for a period of eight days were used and the corresponding annual energy consumptions were calculated using the proposed switching program for each tunnel. The results were compared with a number of scenarios in which the existing lighting system was retrofitted with Lighting Emitting Diodes (LED) luminaires. In these scenarios, the new luminaire arrangement was based not only on the existing luminance demand value for the threshold zone, but also on the newly proposed one with two different control techniques (continuous dimming and 10% step dimming). The fine-tuning method for switching resulted in energy savings between 11% and 54% depending on the tunnel when the scenario of the existing installation at no extra cost was used. Energy savings, when LED luminaires were installed, varied between 57% (for the scenario with existing luminance demand value for the threshold zone and 10% step dimming) and 85% (for the scenario with the new calculated luminance demand and continuous dimming).

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Study for optimizing the daylight “filter” in a pre-tunnel structure

Cited by 16 publications

References 4 publications

Daylighting of road tunnels through external ground-based light-pipes and complex reflective geometry

Daylighting of road tunnels through external ground-based light-pipes and complex reflective geometry

Proposal to Foster Sustainability through Circular Economy-Based Engineering: A Profitable Chain from Waste Management to Tunnel Lighting

Revision of Threshold Luminance Levels in Tunnels Aiming to Minimize Energy Consumption at No Cost: Methodology and Case Studies

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