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Energies 2016, 9(10), 851; doi:10.3390/en9100851

Efficient Solutions and Cost-Optimal Analysis for Existing School Buildings

1
Department of Engineering for Innovation, University of Salento, 73100 Lecce, Italy
2
Energy Efficiency and Renewables Unit, Energy, Transport and Climate Institute, Joint Research Centre (JRC)—European Commission, 21027 Ispra (VA), Italy
*
Author to whom correspondence should be addressed.
Academic Editor: Chi-Ming Lai
Received: 14 July 2016 / Revised: 21 September 2016 / Accepted: 26 September 2016 / Published: 21 October 2016
View Full-Text   |   Download PDF [4519 KB, uploaded 21 October 2016]   |  

Abstract

The recast of the energy performance of buildings directive (EPBD) describes a comparative methodological framework to promote energy efficiency and establish minimum energy performance requirements in buildings at the lowest costs. The aim of the cost-optimal methodology is to foster the achievement of nearly zero energy buildings (nZEBs), the new target for all new buildings by 2020, characterized by a high performance with a low energy requirement almost covered by renewable sources. The paper presents the results of the application of the cost-optimal methodology in two existing buildings located in the Mediterranean area. These buildings are a kindergarten and a nursery school that differ in construction period, materials and systems. Several combinations of measures have been applied to derive cost-effective efficient solutions for retrofitting. The cost-optimal level has been identified for each building and the best performing solutions have been selected considering both a financial and a macroeconomic analysis. The results illustrate the suitability of the methodology to assess cost-optimality and energy efficiency in school building refurbishment. The research shows the variants providing the most cost-effective balance between costs and energy saving. The cost-optimal solution reduces primary energy consumption by 85% and gas emissions by 82%–83% in each reference building. View Full-Text
Keywords: school; buildings; retrofit; nearly zero energy buildings (nZEBs); cost-optimal methodology school; buildings; retrofit; nearly zero energy buildings (nZEBs); cost-optimal methodology
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MDPI and ACS Style

Congedo, P.M.; D’Agostino, D.; Baglivo, C.; Tornese, G.; Zacà, I. Efficient Solutions and Cost-Optimal Analysis for Existing School Buildings. Energies 2016, 9, 851.

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