Study of light-pipes for the use of sunlight in road tunnels: From a scale model to real tunnels

Gil‐Martín, Luisa María; Peña-García, Antonio; Jiménez, Antonia Aránega; Hernández‐Montes, Enrique

doi:10.1016/j.tust.2013.11.007

Cited by 68 publications

(31 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…While trying to find a solution to this kind of problem, some researches exploit solar energy to light the beginning and end of the tunnel [7]. Conversely, some other studies [8,9] suggest the implementation of solar energy to light the beginning and end of the tunnel [7], while other studies [8,9] suggest the exertion of pergols and diffusers materials in the zones preceding and following the tunnel.…”

Section: Introductionmentioning

confidence: 99%

Energy Optimization of Road Tunnel Lighting Systems

et al. 2015

View full text Add to dashboard Cite

A road tunnel is an enclosed and covered infrastructure for the vehicular traffic. Its lighting system provides 24 h of artificial sources only, with a higher amount of electric power used during the day. Due to safety reasons, when there is natural lighting outside the tunnel, the lighting levels in the stretches right after the entrance and before the exit must be high, in order to guide the driver's eye towards the middle of the tunnel where the luminance must guarantee safe driving, avoid any over-dimensioning of the lighting systems, and produce energy savings. Such effects can be reached not only through the technological advances in the field of artificial lighting sources with high luminous efficiency, but also through new materials for road paving characterized by a higher reflection coefficient than other ordinary asphalts. This case study examines different technical scenarios, analyzing and comparing possible energy and economic savings. Traditional solutions are thus compared with scenarios suggesting the solutions previously mentioned. Special asphalts are interesting from an economic point of view, whereas the high costs of LED sources nowadays represent an obstacle for their implementation. OPEN ACCESSSustainability 2015, 7 9665

show abstract

Section: Introductionmentioning

confidence: 99%

Energy Optimization of Road Tunnel Lighting Systems

et al. 2015

View full text Add to dashboard Cite

show abstract

“…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%

“…For this reason, the following proposals are presented: -Structures to use sunlight by shifting the most consuming zone, like classical pergolas or structures [29][30][31], should be constructed with cement originating from the treatment of sewage sludge, as seen in the preceding section. This is possible because these structures do not have to support heavy loads; their mission is just the filtering of natural light.…”

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

View full text Add to dashboard Cite

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.

show abstract

“…Light transmission efficiency of daylight guidance systems: An assessment approach based on simulations and measurements in a sun/sky simulator [21] Characterization of the photometric performance of tubular light guidance systems in terms of light Light Pipes Performance Prediction: inter model and experimental confrontation on vertical circular light-guides [22] Modeling and experimental analysis of vertical solar tubes Study of light-pipes for the use of sunlight in road tunnels: From a scale model to real tunnels [23] Evaluation of the application of light tubes in tunnel lighting Thermal analysis of light pipes for insulated flat roofs [24] Thermal analysis of solar tubes used in roofs Innovative daylighting systems challenges: A critical study [25] Analysis of existing natural light utilization technologies…”

Section: Title Informationmentioning

confidence: 99%

Proposal for an Experimental Methodology for Evaluation of Natural Lighting Systems Applied in Buildings

Spacek¹,

Neto²,

Bilessimo³

et al. 2017

Energies

View full text Add to dashboard Cite

This work has the objective of developing a methodology for the evaluation of indoor natural lighting systems, which, with speed and practicality, provides from real conditions of use a reliable result about the quality and performance of the proposed system. The methodology is based on the construction of two real-size test environments, which will be subjected to a natural light system through reflexive tubes made from recycled material, and to a commercial system already certified and consolidated, creating the possibility of comparison. Furthermore, the data acquired in the test environments will be examined in light of the values of solar radiation obtained from a digital meteorological station, such that it is possible to stipulate the lighting capacity of the systems at different times of the year.

show abstract

Study of light-pipes for the use of sunlight in road tunnels: From a scale model to real tunnels

Cited by 68 publications

References 11 publications

Energy Optimization of Road Tunnel Lighting Systems

Energy Optimization of Road Tunnel Lighting Systems

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

Proposal for an Experimental Methodology for Evaluation of Natural Lighting Systems Applied in Buildings

Contact Info

Product

Resources

About