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Sustainability 2015, 7(8), 10770-10788;

Maintenance and Energy Optimization of Lighting Systems for the Improvement of Historic Buildings: A Case Study

DIAEE—Area Fisica Tecnica, Università degli Studi di Roma "Sapienza", Via Eudossiana, Rome 18 00184, Italy
DIMI—Università degli Studi "Roma TRE", Via Vito Volterra, Rome 62 00146, Italy
Author to whom correspondence should be addressed.
Academic Editors: Marc A. Rosen, Francesco Asdrubali and Pietro Buzzini
Received: 28 May 2015 / Revised: 10 July 2015 / Accepted: 4 August 2015 / Published: 7 August 2015
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Proper lighting is vital to improve, from an artistic point of view, the surface expanse and decorative detailing of architectural heritage buildings considered valuable. When properly lit, monumental buildings can become to onlookers an essential part of the city. Nowadays, for design planners dealing with the improvement of buildings, whose architectural design should be valorized, the real challenge is to combine the lighting artistic requirements with scrupulous economic management in order to limit the energy demand and to respect the environment. For these reasons, this case study examines the lighting of the monumental façade and the cloister of St. Peter in Chains situated in the Faculty of Engineering of Sapienza University of Rome. The present lighting installation, characterized by metal halides, compact fluorescent and halogen lamps, is compared with an alternative scenario presenting LED lamps and scenographic lighting of the monumental façade. Such comparison is based on the evaluation of the lighting levels for different visual tasks and on energy and maintenance issues; the first analysis was performed through the software DIALux Evo 4.0, whereas the second was performed using ecoCALC. This study leads to the conclusion that the lighting levels of the solution presenting LED lamps are better than those of the present solution, and they comply with current standards. Finally, the higher costs of LED lamp installations and the scenographic lighting of the monumental façade are balanced by lower maintenance costs, with a payback period of seven years. View Full-Text
Keywords: lighting simulations; LED; historic buildings; maintenance; economic analysis lighting simulations; LED; historic buildings; maintenance; economic analysis

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Salata, F.; Golasi, I.; Falanga, G.; Allegri, M.; de Lieto Vollaro, E.; Nardecchia, F.; Pagliaro, F.; Gugliermetti, F.; Vollaro, A.L. Maintenance and Energy Optimization of Lighting Systems for the Improvement of Historic Buildings: A Case Study. Sustainability 2015, 7, 10770-10788.

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